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Article in Chinese | WPRIM | ID: wpr-879436


OBJECTIVE@#To explore the treatment strategy and clinical efficacy for os odontoideum complicated with atlantoaxial dislocation.@*METHODS@#The clinical data of 17 patients with os odontoideum complicated with atlantoaxial dislocation surgically treated from January 2006 to January 2015 were retrospectively analyzed, including 7 males and 10 females, aged 17 to 53 (43.1±11.3) years old;course of disease was 3 to 27(10.2±6.9) months. All patients received cranial traction before operation, 12 of 14 patients with reducible dislocation were treated by posterior atlantoaxial fixation and fusion, and 2 patients with atlantooccipital deformity were treated by posterior occipitocervical fixation and fusion;3 patients with irreducible alantoaxial dislocation were treated by transoral approach decompression combined with posterior atlantoaxial fixation and fusion. The operation time, intraoperative blood loss and perioperative complications were recorded. Visual analogue scale (VAS) and Japanese Orthopaedic Association (JOA) score were used to evaluate the change of neck pain and neurological function. Atlantoaxial joint fusion rate was evaluated by CT scan.@*RESULTS@#The operation time of posterior fixation and fusion ranged from 86 to 170 (92.2±27.5) min, and the intraoperative blood loss was 200-350 (250.7±65.2) ml. No vertebral artery injury and spinal cord injury were recorded. Among the patients underwent atlantoaxial fixation and fusion, 1 patient with reducible dislocation fixed by C@*CONCLUSION@#Surgical treatment of os odontoideum complicated with atlantoaxial dislocation can achieve satisfactory results, improve the patient's neurological function and improve the quality of life, however the surgical options needs to be individualized.

Adolescent , Adult , Atlanto-Axial Joint/surgery , Axis, Cervical Vertebra , Female , Humans , Joint Dislocations/surgery , Male , Middle Aged , Quality of Life , Retrospective Studies , Spinal Fusion , Treatment Outcome , Young Adult
Article in Chinese | WPRIM | ID: wpr-879422


OBJECTIVE@#To compare the clinical efficacy of titanium cable biomimetic reconstruction of coracoclavicular ligament and clavicular hook plate in the treatment of acromioclavicular joint dislocation.@*METHODS@#The clinical data of 39 patients with severe acute acromioclavicular joint dislocation from January 2017 to December 2018 were retrospectively analyzed, 19 patients in double strand titanium cable group, including 13 males and 6 females, aged from 26 to 67 years old; Rockwood classification:10 cases of type Ⅲ, 4 cases of type Ⅳ and 5 cases of type Ⅴ;8 cases of traffic injury and 11 cases of fall injury;the time from injury to operation was 3 to 6 days. There were 20 patients in steel plate group, including 15 males and 5 females, aged from 25 to 71 years old. Rockwood classification:11 cases of type Ⅲ, 4 cases of typeⅣ, 5 cases of type Ⅴ;7 cases of traffic injury, 13 cases of fall injury;the time from injury to operation was 2 to 7 days. The length of incision, operation time, intraoperative blood loss, cost, VAS score before and after operation, and Constant-Murley score before and after operation were compared between two groups. Postoperative X-ray films were taken to observe the reduction and maintenance of acromioclavicular joint dislocation. Complications were recorded.@*RESULTS@#Thirty-six patients were followed up for 12 to 14 months. The amount of intraoperative blood loss in the two groups was basically the same. The operation incision in double strand titanium cable group was shorter, the operation time in steel plate group was shorter, and the operation cost in double strand titanium cable group was less. One week and one year after operation, the pain of double strand titanium cable group was less than that of steel plate group. One year after operation, the Constant-Murley score of double strand titanium cable group was higher than that of steel plate group. The postoperative X-ray showed that the acromioclavicular joint in double strand titanium cable group was well reduced, and there was 1 case with slight reduction loss. In the plate group, there was no reduction loss after removal of the clavicular hook plate, and 8 patients had distal clavicular bone atrophy or acromion bone resorption. In steel plate group, 4 cases had long-term postoperative pain, postoperative dysfunction and other complications.@*CONCLUSION@#The clinical effect of coracoclavicular ligament reconstruction with double strand titanium cable is better than that of clavicular hook plate in the treatment of severe acute acromioclavicular joint dislocation, with less trauma (no secondary operation) and lower cost.

Acromioclavicular Joint/surgery , Adult , Aged , Bone Plates , Female , Humans , Joint Dislocations/surgery , Male , Middle Aged , Retrospective Studies , Titanium , Treatment Outcome
Article in Chinese | WPRIM | ID: wpr-921941


OBJECTIVE@#To study the clinical efficacy and complications of Endobutton titanium plate and clavicle hook plate in the treatment of acromioclavicular dislocation.@*METHODS@#Total 48 patients with Rockwood Ⅲ to Ⅴ acromioclavicular joint dislocation from March 2015 to May 2019 were retrospectively divided into two groups according to different surgical methods. Among the patients, 23 patients were treated with Endobutton loop titanium plate fixation (observation group), including 15 males and 8 females, ranging in age from 23 to 59 years old, with an average of(36.2±8.1) years old;Rockwood type Ⅲ in 6 cases, type Ⅳ in 11 cases and type Ⅴ in 6 cases. Twenty-five patients were treated with clavicular hook plate(control group), including 17 males and 8 females, ranging in age from 22 to 54 years old, with an average of (34.7±6.4) years old; Rockwood type Ⅲ in 6 cases, type Ⅳ in 14 cases and type Ⅴ in 5 cases. The operation time, intraoperative bleeding, hospitalization time, visual analogue scale (VAS) of pain, Constant-Murley score of shoulder function and postoperative complications were compared between the two groups.@*RESULTS@#All the patients were followed up, and the duration ranged from 24 to 51 months, with a mean of (30.5±6.5) months. The amountof bleeding and hospitalization time in the observation group were (71.9±4.0) ml and(8.2±1.6) d respectively;and those in the control group were (97.6±13.4) ml and (12.8±1.2) d respectively. There was significant difference between the two groups (@*CONCLUSION@#Compared with clavicular hook plate internal fixation in the treatment of acromioclavicular joint dislocation, Endobutton loop titanium plate internal fixation technology has the advantages of less surgical bleeding, shorter hospitalization time, less postoperative pain, good recovery of shoulder joint function and less complications.

Acromioclavicular Joint/surgery , Adult , Bone Plates , Case-Control Studies , Female , Humans , Joint Dislocations/surgery , Male , Middle Aged , Retrospective Studies , Treatment Outcome , Young Adult
Prensa méd. argent ; 106(9): 537-544, 20200000. fig, graf
Article in English | LILACS, BINACIS | ID: biblio-1362876


Background : Chronic elbow dislocation is defined as untreated elbow dislocation for longer than 2 weeks. Goal of treatment is stable reduction of elbow joint and facilitation of early elbow motion for optimal end result. Known operative methods is the Kocher posterolateral approach.which can accumulate hematome, and longer time needed to identify Ulnar nerve. Therefore, we would like to introduce the new modified medial elbow joint incision approach. Methodology: This study utilized a cross-sectional review of patients with surgical treatment of simple chronic elbow dislocation. Questionnaires were taken using Oxford Elbow Score, Mayo Elbow Performance Index, and Disability of Arm, Shoulder, and Hand Questionnaire to assess current elbow status Result : Utilizing Oxford elbow score, the analytic group score value ranged from 21-46, while control group's score value were 37-42 (P-value <0.0001). Mayo Elbow Performance Index score, from the analytic group, scored ranges from 45 - 82. the control group, a mean value of 85 were scored (P-value <0.0001), the DASH score revealed total mean value of 8.3 in the analytic group, compared to score 6 in the control group (P-value = 0.0468 ). The range of motion is increased in total flexion and extension from both groups(P-value <0.0001) Conclusion: Modified medial elbow approach provides faster method of identifying ulnar nerve, requires less skin flap for closure and less space for blood accumulation. Modified medial elbow approach provides good functional outcome with no complications related to ulnar nerve reported in this study.

Humans , Ulnar Nerve/surgery , Skin Transplantation , Joint Dislocations/surgery , Elbow Joint/surgery , Surgical Wound , Hematoma/prevention & control
Chinese Journal of Traumatology ; (6): 367-371, 2020.
Article in English | WPRIM | ID: wpr-879649


Subtalar dislocation is defined as a separation of the talocalcaneal and talonavicular articulations, commonly caused by high-energy mechanisms, which include falls from height, motor vehicle crashes, and twisting leg injuries. The dislocations are divided into medial, lateral, anterior, and posterior types on the basis of the direction in which the distal part of the foot has shifted in relation to the talus. The most common type is medial dislocation resulted from inversion injury. Subtalar dislocation may accompany with other fractures. Physical examination must be performed carefully to assess for neurovascular compromise. Most of the subtalar dislocations can be treated with closed reduction under sedation. If this is not possible, open reduction without further delay should be conducted. After primary treatment, X-ray and computed tomography scan should be performed to evaluate the alignment and the fractures. We report a 37-year-old male patient sustained a subtalar dislocation without any bony injury when he was playing football. The patient was successfully treated by closed reduction, and a good alignment was observed at the last follow-up. The pathogenesis and treatment method of this case were analyzed, and the related literature were reviewed, which provided a reference for future clinical treatment.

Adult , Closed Fracture Reduction/methods , Follow-Up Studies , Football/injuries , Humans , Joint Dislocations/surgery , Male , Subtalar Joint/injuries , Tomography, X-Ray Computed , Treatment Outcome
Article in English | LILACS | ID: biblio-1177643


A simultaneous double dislocation (both proximal [PIP] and distal [DIP] interphalangeal joints) of a triphalangeal finger is a rare entity. The most common hand affected is the right hand. In the case of a closed triple dislocation (metacarpophalangeal [MCP], PIP and DIP joints); there are only two cases in the literature revised. In this case, we report an open triple dislocation in the index finger of the left-hand of a 54-year-old man treated by closed reduction and 3 weeks of immobilization followed by active mobilization with satisfactory results.

La luxación simultánea de las articulaciones interfalángicas proximal (IFP) y distal (IFD) de un dedo de tres articulaciones es una rara entidad. La mano que es afectada con más frecuencia es la derecha. Con relación a una triple luxación cerrada (articulación metacarpofalángica [MCF], IFP e IFD), sólo hay descritos dos casos en la literatura revisada. En este caso, describimos una triple luxación abierta del segundo dedo de la mano en un varón de 54 años de edad tratada mediante reducción cerrada,e inmovilización durante 3 semanas seguida de movilización activa supervisada, con resultado final satisfactorio.

Humans , Male , Middle Aged , Wounds and Injuries/complications , Joint Dislocations/surgery , Joint Dislocations/etiology , Finger Injuries/surgery , Finger Injuries/etiology , Closed Fracture Reduction/methods , Joint Dislocations/diagnostic imaging , Finger Injuries/diagnostic imaging , Finger Joint , Immobilization
Acta ortop. mex ; 33(5): 314-318, sep.-oct. 2019. tab, graf
Article in Spanish | LILACS | ID: biblio-1284963


Resumen: Introducción: La articulación acromioclavicular es parte importante del complejo articular del hombro, formada por el extremo lateral de la clavícula y el borde medial del acromion. Tiene un alto índice de lesión en grados asociados a actividad física y accidentes laborales. Predomina en jóvenes laboralmente activos. Objetivo: Analizar la funcionalidad a un año en pacientes con luxación acromioclavicular grado III, operados con sistema anclaje doble botón. Material y métodos: Estudio descriptivo, prospectivo, longitudinal, unicéntrico, durante Marzo de 2015 a Julio de 2016, en pacientes con luxación acromioclavicular grado III en el Hospital de Traumatología y Ortopedia de Puebla. Se incluyeron pacientes con edad de 18 a 45 años, trabajadores, con evolución mayor de siete días. La estadística fue descriptiva. Resultados: Fueron 17 pacientes; 14 (82.4%) hombres y tres (17.6%) mujeres. Edad promedio: 29.5 (19 a 44 años) ± 7.475 años; nueve (52.9%) pacientes en el hombro derecho y ocho (47.1%) en el izquierdo. Promedio de evolución: 2.88 (1 a 7) ± 2.147 días. Incapacidad promedio: 42.06 días. Conclusiones: La reducción abierta y estabilización dinámica mediante el sistema anclaje doble botón (Tight Rope) ofrece estancia intrahospitalaria corta, poco tiempo de incapacidad, reintegración rápida a la actividad laboral y resultados funcionales adecuados a un año de evolución.

Abstract: Introduction: The acromioclavicular joint, important part of the shoulder complex is formed by clavicular lateral end and acromial medial border, with high index of injury in different grades, associated to physical activity and work accidents, most commonly in active young adults. Objective: To analyze functional outcomes in patients with acromioclavicular dislocation with use of tight rope in one year. Material and methods: Descriptive, prospective, longitudinal, unicentric study, from March 2015 and July 2016 in post-operated patients with diagnosis of acromioclavicular dislocation grade III in Hospital de Traumatología y Ortopedia de Puebla. Patients aged 18 to 45 years were included, active workers, with evolution time < 7 days. Results: 17 patients with diagnosis of acromioclavicular dislocation, fourteen (82.4%) male and 3 (17.6%) female. Average age: 29.5 (19 to 44 years) ± 7.475 years; lesion occurred 9 (52.9%) patients in right shoulder and 8 (47.1%) in left side. Average time of the injury: 2.88 (1-7) ± 2,147 days. Average inability granted: 42.06 days. Conclusions: The open reduction technique and dynamic stabilization of the joint with Tight Rope offers short hospital stay, short time of inability and rapid reintegration to work activity, at 1 year of evolution.

Humans , Male , Female , Adolescent , Adult , Young Adult , Shoulder Dislocation , Acromioclavicular Joint , Joint Dislocations/surgery , Bone Plates , Prospective Studies , Treatment Outcome , Middle Aged
Rev. bras. anestesiol ; 69(5): 510-513, Sept.-Oct. 2019. graf
Article in English | LILACS | ID: biblio-1057461


Abstract Background and objectives: Costoclavicular brachial plexus block is an anesthesia performed through the infraclavicular route described in the literature as a safe and effective route for upper limb anesthesia distal to the elbow. The following report describes the case of a patient whose traditional plexus blocking techniques presented ultrasound visualization difficulty, but the costoclavicular approach was easy to visualize for anesthetic blockade. Case report: A grade 3 obese patient scheduled for repair of left elbow fracture and dislocation. Ultrasound examination revealed a distorted anatomy of the supraclavicular region and the axillary region with skin lesions, which made it impossible to perform the blockade in these regions. It was decided to perform an infraclavicular plexus block at the costoclavicular space, where the brachial plexus structures are more superficial and closer together, supported by a muscular structure, lateral to all adjacent vascular structures and with full view of the pleura. The anesthetic block was effective to perform the procedure with a single injection and uneventfully. Conclusion: Costoclavicular brachial plexus block is a good alternative for upper limb anesthesia distal to the elbow, being a safe and effective option for patients who are obese or have other limitations to the use of other upper limb blocking techniques.

Resumo Justificativa e objetivos: O bloqueio de plexo braquial via costoclavicular é uma anestesia feita por via infraclavicular, já descrita na literatura como uma via segura e efetiva para anestesia de membro superior distal ao cotovelo. O relato a seguir trata de um paciente em que as técnicas tradicionais para bloqueio de plexo apresentavam dificuldade de visibilização à ultrassonografia, já a via costoclavicular foi de fácil visibilização para execução do bloqueio anestésico. Relato de caso: Paciente com obesidade grau 3 a ser submetido a correção de fratura e luxação de cotovelo esquerdo apresentava anatomia da região supraclavicular distorcida à avaliação ultrassonográfica e região axilar com lesões de pele, que impossibilitavam o bloqueio nessas regiões. Optou-se por fazer o bloqueio de plexo via infraclavicular no espaço costoclavicular, região onde as estruturas do plexo braquial estão mais superficiais e unidas, amparadas por uma estrutura muscular, laterais a todas as estruturas vasculares adjacentes e com a visibilização plena da pleura. O bloqueio anestésico foi efetivo para a realização do procedimento sob punção única em pele e sem intercorrências. Conclusão: O bloqueio de plexo braquial via costoclavicular é uma boa opção para anestesia de membro superior distal ao cotovelo, é uma opção segura e efetiva para pacientes obesos ou que tenham outras limitações à aplicação de outras técnicas de bloqueio de membro superior.

Humans , Male , Adult , Arm , Ultrasonography, Interventional , Joint Dislocations/surgery , Joint Dislocations/complications , Elbow Joint/injuries , Fractures, Bone/surgery , Fractures, Bone/complications , Brachial Plexus Block/methods , Obesity/complications , Elbow Joint/surgery
Acta ortop. mex ; 33(4): 256-260, jul.-ago. 2019. graf
Article in Spanish | LILACS | ID: biblio-1284950


Resumen: Antecedentes: La fractura y la luxación aislada de los huesos cuneiformes son un evento no muy frecuente y sólo pocos casos han sido reportados en la literatura. Este tipo de eventos se presenta como una variación de las lesiones de Lisfranc. El presente reporte muestra un caso clínico poco frecuente de un paciente con luxación de la primera y segunda cuña y fractura in situ de la tercera cuña del pie izquierdo. Caso clínico: Mujer de 49 años de edad, que presentó traumatismo severo del dorso del pie con exposición de tejido óseo y blando como consecuencia de atropellamiento. La paciente fue sometida a cirugía en el Servicio de Urgencias, donde se realizó aseo quirúrgico, desbridamiento, reducción de la luxación de la primera y segunda cuña y fijación percutánea con clavillos Kirschner de 2.0 mm. Resultados: Posterior a la cirugía, la paciente se reportó con buen estado en general, orientada, sin facie de dolor, estable, consciente, sin huellas de sangrado activo por la herida y con presencia de clavillos Kirschner en adecuada posición. Discusión: Se recomienda una inspección exhaustiva de la lesión a través del análisis de las imágenes de rayos X, tomografía computarizada o imágenes de resonancia magnética, especialmente en lesiones no expuestas, pues con ello se puede aplicar el tratamiento adecuado y lograr una pronta recuperación del paciente.

Abstract: Backgrounds: The isolated fracture/dislocation of the cuneiform bones is a not very frequent event and only a few cases have been reported in the literature. This type of event is presented as a variation of the Lisfranc injuries. The present report shows a rare clinical case of a patient with dislocation of the first and second cuneiform bones and fracture in situ of the third cuneiform bone of the left foot. Case report: A 49-year-old female patient presented severe traumatism of the dorsum of the foot with bony and soft tissue exposure as a result of a car accident. The patient underwent surgery in the emergency department consisting of surgical cleaning, debridement, reduction of dislocation of the first and second cuneiform bones and percutaneous fixation with 2.0 mm Kirschner wires. Results: After the surgery, the patient was found to be in good general condition, oriented without pain, stable, conscious, without traces of active bleeding from the wound and with the presence of Kirschner wires in an appropriate position. Discussion: An exhaustive inspection of the injury is recommended through the analysis of X-ray images, CT scans or magnetic resonance imaging, especially in unexposed lesions in order to apply the appropriate treatment and be able to achieve a prompt recovery of the patient.

Humans , Female , Tarsal Bones/injuries , Joint Dislocations/surgery , Fractures, Bone , Bone Wires , Foot , Middle Aged
Acta ortop. mex ; 33(4): 247-251, jul.-ago. 2019. graf
Article in Spanish | LILACS | ID: biblio-1284948


Resumen: Introducción: La luxación de la articulación acromioclavicular es una lesión común que se observa principalmente en adultos jóvenes. Las indicaciones para el manejo quirúrgico y la técnica más adecuada siguen siendo controvertidas. Material y métodos: La técnica quirúrgica presentada se basa en una reconstrucción anatómica de los ligamentos coracoclaviculares mediante un injerto autólogo del tendón del semitendinoso, sin túneles en la clavícula y sin ningún dispositivo de fijación, ya que se utilizan sólo suturas. Resultados: Se logró la reconstrucción anatómica y biológica de los ligamentos coracoclaviculares, la cual utilizó un autoinjerto tendinoso sin ningún dispositivo de fijación adicional, lo que minimiza el riesgo de complicaciones relacionadas con el uso de tornillos o implantes metálicos. Discusión: Este procedimiento es un método eficaz y confiable para estabilizar la articulación. Se requieren estudios que informen los resultados funcionales y radiológicos con el empleo de esta técnica quirúrgica para entonces poder asegurar que tiene ventajas sobre otras opciones terapéuticas existentes en la actualidad.

Abstract: Introduction: Dislocation of the acromioclavicular joint is a common injury, which is observed mainly in young adults; indications for surgical management and the most appropriate technique remain controversial. Material and methods: We present a surgical technique, whose objective is the anatomical reconstruction of the coracoclavicular ligaments with autologous semitendinous graft, without tunnels in the collarbone and without fixing devices. Results: This technique is reliable for stabilizing the joint in the short term and we consider that it could neutralize the anteroposterior translation of the distal collarbone. Discussion: Studies are required to report on functional and radiological results, with the use of this surgical technique so that we can then point out that it has advantages over other therapeutic options existing today.

Humans , Tendons/transplantation , Acromioclavicular Joint/surgery , Joint Dislocations/surgery , Hamstring Muscles , Clavicle , Autografts , Ligaments, Articular
Acta ortop. mex ; 33(2): 88-95, mar.-abr. 2019. tab, graf
Article in Spanish | LILACS | ID: biblio-1248640


Resumen: Introducción: En la luxación acromioclavicular inestable verticalmente es elemental el tratamiento quirúrgico mediante la reconstrucción de los ligamentos coracoclaviculares, con la finalidad de recuperar su estabilidad y función normal. Existen técnicas de un solo túnel o de dos en la clavícula (anatómica) con material biológico o sintético. Material y métodos: Es un estudio cuasiexperimental prospectivo longitudinal; se incluyeron 33 pacientes entre 20 y 50 años de edad con diagnóstico de luxación acromioclavicular completa con inestabilidad vertical. Se les efectuó plastía sólo de los ligamentos coracoclaviculares con técnica anatómica de Mazzocca usando injerto tendinoso autólogo del peroneo lateral corto. La evaluación de resultados fue con el test de PENN. Resultados: 100% de los pacientes se encuentran sin dolor y con un arco de movilidad normal del hombro un año después de la cirugía. Radiográficamente, la distancia coracoclavicular comparada con el lado sano tuvo una diferencia promedio de 1.0 mm en reposo y 0.9 mm bajo carga. Discusión: La plastía tendinosa de los ligamentos coracoclaviculares con técnica anatómica mediante injerto tendinoso autólogo del peroneo lateral corto permite recuperar la estabilidad acromioclavicular y la función normal del hombro a 12 meses de seguimiento.

Abstract: Introduction: In the dislocation acromioclavicular unstable vertically, the surgical treatment is elementary by the plasty of the ligaments coracoclaviculares, with the purpose of recovering its stability and normal function. There are techniques of a single tunnel in the clavicle or two tunnels (anatomical), with biological or synthetic material. Material and methods: It is a longitudinal prospective experimental study; we included 33 patients between 20 and 50 years of age with diagnosis of complete acromioclavicular dislocation with vertical instability. Reconstruction was performed only of the coracoclavicular ligaments with Mazzoca's technique of using autologous tendon graft of the short lateral peroneus. The evaluation of results was with the PENN test. Results: 100% of patients are painless and with an arch of normal shoulder mobility one year after surgery. Radiographically, the coracoclavicular distance compared to the healthy side had an average difference of 1.0 mm at rest and 0.9 mm under load. Discussion: The reconstruction of the coracoclavicular ligaments with anatomical technique by autologous tendon graft of the short lateral peroneus, allows to recover the acromioclavicular stability and the normal function of the shoulder.

Humans , Adult , Young Adult , Acromioclavicular Joint/surgery , Acromioclavicular Joint/injuries , Joint Dislocations/surgery , Ligaments, Articular/surgery , Tendons , Prospective Studies , Clavicle , Middle Aged
Article in Spanish | LILACS, BNUY, UY-BNMED | ID: biblio-1088683


Introducción: Las luxaciones carpo-metacarpianas son lesiones poco frecuentes, que van del 0.5 al 1% de las luxaciones de los huesos de la mano. Siendo extremadamente infrecuente la luxación simultanea de los 5 dedos. Objetivo: El objetivo de nuestro trabajo es documentar una lesión poco frecuente producida en un paciente asistido en nuestro centro. Así como realizar una puesta a punto sobre las medidas diagnósticas y terapéuticas de dicha lesión. Caso clínico: Se presenta el caso de un hombre de 63 años, diestro, artesano en hierro y madera, que sufre un accidente de tránsito de alta energía en moto versus auto, sufriendo traumatismo en mano derecha, sin presentar otros traumatismos. De la exploración física, en el departamento de emergencia, se constata la mano derecha dolorida con gran deformidad en dorso. Se diagnosticó: luxación dorsal carpo-metacarpiano de los 5 metacarpianos, con fractura del sector distal del trapecio, trapezoide, hueso grande y ganchoso. Se realizó reducción cerrada en block quirúrgico con anestesia general, siendo la reducción inestable se colocan agujas de Kirschner para su estabilización. Se confecciona, además, una férula de yeso de protección. Se solicitó una tomografía computada de control donde se objetiva buena reducción de las 5 articulaciones carpo-metacarpianas. Se retiraron las agujas de Kirschner a las 6 semanas. A los 3 meses de la lesión presenta una mano indolora, con buen rango de movilidad, con disminución a la fuerza prensil máxima comparada con la contralateral. El paciente reanuda sus tareas, incorporándose totalmente al trabajo a los 6 meses. Presenta, al año de la cirugía, un score de DASH excelente. Discusión: Las luxaciones de los 5 metacarpianos son lesiones extremadamente raras. Se han reportado en el mundo menos de 20 casos. A pesar de los elementos clínicos sugestivos, el diagnostico de esta lesión es difícil, siendo fundamental contar con un enfoque radiológico de perfil estricto de mano. Los resultados de esta lesión son inciertos, la función de la mano y la muñeca se mantiene pero frecuentemente asociado a una reducción de fuerza prensil. Este tipo de trauma lleva, en mayor o menor grado, al desarrollo de artrosis carpo metacarpiana a largo plazo.

Introduction: Carpometacarpal join dislocations, are really infrequent injuries, with an incidence that goes from 0,5 to 1% of all bone hand dislocations. Being extremely rare the simultaneous luxation of all five fingers. Objectives: Our work objective is to report a very infrequent injury found on a patient treated at our medical center. As well as getting up to date with diagnosis and treatment of such injury. Clinical case: A 63 year old male case is presented, right-handed, wood and iron artisan, who was involved in a high-impact car crush against a motorbike, suffering a trauma on his right hand, without any other injuries. At the emergency room, the physical examination showed a painful right hand deformed on the back. His diagnosis was dorsal carpometacarpal luxation of all 5 metacarpus, with a distal fracture of the trapezium, trapezoid, capitate and hamate bones. A closed reduction at the surgical room was performed, with general anesthesia, being the reduction unstable therefore Kirschner needles were used for stabilization. A plaster cast was used for its protection. A control tomography was performed showing good reduction of all 5 carpometacarpal joints. Kirschner needles were taken out 6 weeks later, at which point the rehabilitation program was started with the physiatrist team. Three months after the injury, the hand was painless, with a good range of movement, a diminished maximum catching strength compared with the other hand. The patient restarted his usual chores, fully reincorporating to his job 6 months later. He presents an excellent DASH score one year after surgery. Discussion: Luxation of all 5 metacarpus is an extremely rare injury. It has been reported less than 20 cases worldwide. In spite of clinical suggestive elements, the diagnosis of this injury is quite difficult, being of great importance to count with x-rays with a straight profile incidence of the hand. The results of this injury are uncertain; the functionality of the hand and wrist is frequently sustained associated with a reduction of the catching strength. This type of trauma will end up developing in greater or lesser degree, long term carpometacarpal arthrosis.

Introdução: As luxações carpo-metacarpianas são lesões raras, variando de 0,5 a 1% das luxações dos ossos da mão. O deslocamento simultâneo dos 5 dedos é extremamente incomum. Objetivo: O objetivo do nosso trabalho é documentar uma lesão rara produzida em um paciente assistido em nosso centro. Bem como realizar um set-up nas medidas diagnósticas e terapêuticas da referida lesão. Caso clínico: O caso de um homem de 63 anos, destro, artesão em ferro e madeira, que sofre um acidente de motocicleta de alta energia em uma motocicleta contra um carro, sofrendo traumatismo em sua mão direita, sem apresentar outras lesões, é apresentado. A partir do exame físico no pronto-socorro, há uma dor na mão direita com grande deformidade nas costas. Foi diagnosticado: luxação metacarpal do dorsal do carpo dos 5 metacarpos, com fratura do setor trapézio distal, trapézio, osso grande e hamato. Uma redução fechada foi realizada em um bloco cirúrgico com anestesia geral, com a redução instável sendo colocada com fios K para estabilização. Uma tala de gesso protetora também é feita. Solicitou-se tomografia computadorizada de controle, onde foi observada boa redução das 5 articulações carpo-metacarpianas. Os fios de Kirschner foram removidos às 6 semanas. Aos 3 meses após a lesão, ele apresenta uma mão indolor, com boa amplitude de mobilidade, com diminuição da força preênsil máxima em comparação com a força contralateral. O paciente retoma suas tarefas, ingressando totalmente no trabalho aos 6 meses. Um excelente escore DASH é apresentado um ano após a cirurgia. Discussão: As luxações dos 5 metacarpos são lesões extremamente raras. Menos de 20 casos foram relatados no mundo. Apesar dos elementos clínicos sugestivos, o diagnóstico dessa lesão é difícil, sendo fundamental a abordagem radiológica do perfil estrito da mão. Os resultados dessa lesão são incertos, a função da mão e do punho é mantida, mas freqüentemente associada a uma redução na força de preensão. Este tipo de trauma leva, em maior ou menor grau, ao desenvolvimento de artrose metacarpal do carpo a longo prazo.

Humans , Male , Middle Aged , Joint Dislocations/surgery , Joint Dislocations/diagnostic imaging , Carpometacarpal Joints/injuries , Hand Injuries/surgery , Hand Injuries/diagnostic imaging , Bone Wires , Hand Injuries/rehabilitation
Clinics ; 73: e259, 2018. tab
Article in English | LILACS | ID: biblio-952816


OBJECTIVES: To investigate the primary clinical value of atlantoaxial pedicle screw placement assisted by a modified 3D-printed navigation template. METHODS: We retrospectively analyzed the cases of 17 patients treated from June 2015 to September 2016 with atlantoaxial pedicle screw placement assisted by a modified 3D-printed navigation template. All procedures were performed prior to surgery, including thin-slice CT scanning, medical image sampling and computerized 3D modeling of the atlantoaxial joint, optimal pedicle screw trajectory determination, and anatomical trait acquisition for the atlantoaxial pedicle, spinous process of the axis, vertebral lamina and posterior lateral mass, and design of a reverse template. During surgery, a navigation template was tightly attached to the atlantoaxial joint to assist in pedicle screw placement. Surgeons subsequently used an electric drill to remove the template through a guide channel and then placed the atlantoaxial pedicle screw. Observed indexes included the VAS score, JOA improvement rate, surgery duration, and blood loss. RESULTS: Surgery was successful in all 17 patients, with an average operation duration of 106±25 min and an average blood loss of 220±125 ml. Three days postoperatively, the VAS score decreased from 6.42±2.21 to 3.15±1.26. Six months postoperatively, the score decreased to 2.05±1.56. The postoperative JOA score increased significantly from 7.68±2.51 to 11.65±2.72 3 d after surgery and to 13.65±2.57 after 6 months. Sixty-eight pedicle screws were inserted successfully, with 34 in the atlas and 34 in the axis. According to the Kawaguchi standard, 66 screws were in grade 0 (97.06%), and 2 were in grade 1 (2.94%). The pre- and postoperative transverse and sagittal screw angles showed no significant differences. CONCLUSIONS: Atlantoaxial pedicle screw placement assisted by a modified 3D-printed navigation template is worth recommending due to the improved accuracy in screw placement, improved patient safety and beneficial clinical effects.

Humans , Male , Female , Adult , Middle Aged , Atlanto-Axial Joint/surgery , Joint Dislocations/surgery , Pedicle Screws/standards , Printing, Three-Dimensional/standards , Reference Values , Time Factors , Tomography, X-Ray Computed , Reproducibility of Results , Retrospective Studies , Treatment Outcome , Recovery of Function , Imaging, Three-Dimensional/methods , Joint Dislocations/rehabilitation , Equipment Design , Visual Analog Scale
Rev. Asoc. Argent. Ortop. Traumatol ; 82(4): 299-305, dic. 2017. []
Article in Spanish | LILACS, BINACIS | ID: biblio-896272


Se presentan dos casos clínicos y la revisión de la literatura actual sobre luxación convergente de codo. En el primer caso, se muestra cómo un retraso en el diagnóstico conducirá a una reducción abierta y fijación con agujas de Kirschner, mientras que un diagnóstico temprano permite la reducción cerrada y el tratamiento conservador como se describe en el segundo caso. La clave de diagnóstico para la luxación convergente de codo radica en la correcta interpretación de las radiografías y el bloque de prono-supinación en el examen físico. Se recomienda el uso de indometacina para evitar calcificaciones heterotópicas. El resultado final es mejor cuando el diagnóstico es precoz, independientemente del método de reducción. Nivel de Evidencia: IV

We describe two clinical cases and review the available literature on convergent elbow dislocation. Our first case shows how a delay in the diagnosis will lead to an open reduction and internal fixation with K-wires. On the other hand, an early diagnosis prompts a closed reduction without fixation as it is described in the second case. The diagnostic key for the convergent dislocation of the elbow lies in the correct interpretation of radiographs and the prono-supination block on physical examination. The use of indomethacin is recommended to avoid heterotopic calcifications. The final outcome is better when an early diagnosis is achieved regardless of the reduction method. Level of Evidence: IV

Child , Indomethacin/therapeutic use , Joint Dislocations/surgery , Joint Dislocations/diagnosis , Joint Dislocations/therapy , Elbow Joint/injuries
Acta ortop. mex ; 30(6): 284-290, nov.-dic. 2016. tab
Article in Spanish | LILACS | ID: biblio-949765


Resumen: Objetivo: Valorar las complicaciones y secuelas del tratamiento de la fractura-luxación de Lisfranc (FLL). Material y métodos: Se realizó un estudio de cohortes ambispectivo trasversal de 83 pacientes con diagnóstico de fractura-luxación de Lisfranc. Se utilizó un protocolo de recopilación de datos con variables relacionadas con la lesión, parámetros clínicos, terapéuticos, complicaciones y escalas de valoración clínica. Resultados: 66 pacientes (79.5%) presentaron complicaciones tanto precoces como tardías. Las complicaciones precoces sumaron nueve casos de edema postoperatorio, tres de infección superficial, dos de necrosis cutánea que precisó injerto libre de piel (ILPH), uno de lesión vascular, uno de tromboembolismo pulmonar (TEP), uno de pérdida de reducción en el postoperatorio precoz, uno de mala reducción que precisó de nueva intervención. Entre las complicaciones tardías, 41 pacientes (49.40%) presentaron signos radiológicos de artrosis en la articulación tarsometatarsiana, cinco con enfermedad de Sudeck que precisó tratamiento, ocho con descalcificación por desuso, 12 con edema residual, uno con pérdida de reducción en fase tardía, uno con cicatriz hipertrófica y brida retráctil, uno con osteomielitis crónica, uno con seudoartrosis, tres con intolerancia/infección tardía al material de osteosíntesis; también hubo reintervención de siete pacientes en fase de secuelas donde se les realizó artrodesis. No se observó ninguna rotura de material de osteosíntesis. Casi la mitad de los pacientes (49.4%) recibieron algún tipo de indemnización económica tras el accidente. Conclusiones: El tratamiento de las FLL debe realizarse lo antes posible, ya que la estabilización en un breve plazo de tiempo puede ayudar a mejorar los resultados. La reducción anatómica no predice los buenos resultados. Un número importante de pacientes refirió dolor residual.

Abstract: Objective: To value the complications and sequels for patients with Lisfranc's fracture-luxation (FLL). Material and methods: A transverse ambispective study of cohorts was realized of 83 patients by diagnosis of Lisfranc's fracture-luxation. There was in use a protocol of withdrawal of information with variables related to the injury, clinical, therapeutic parameters, complications and scales of clinical valuation. Results: 66 patients (79.5%) presented complications grouping early and late. Analyzing the early complications, we observe 9 cases of postoperatory edema with inflammation and swelling, 3 cases of superficial infection, 2 cases of necrosis cutaneous that precise graft should free of skin (ILPH), 1 case of vascular complication, 1 case of pulmonary embolis (TEP), 1 case of loss of reduction in the precocious postoperatory, 1 case of bad reduction that was necessary new intervention. The late complications presented the following distribution: 41 patients (49.40%) presented radiological signs of degenerative osteoarthritis in the tarsometatarsal joint, 5 cases of Sudeck's disease that needed treatment, 8 cases of decalcification for disuse, 12 cases of edema and residual inflammation, 1 case of loss of reduction in late phase, 1 case of hypertrophic scar with retractable bridle, 1 case of chronic osteomyelitis, 1 case of seudodegenerative osteoarthritis, 3 cases of late intolerance/infection to the osteosynthesis material, reintervention of 7 patients in phase of sequels where they were realized artrodesis. No break of material was observed of osteosynthesis. Almost the half of the patients (49.4%) they received some type of economic indemnification after the accident. Conclusions: The treatment of the FLL must be realized as soon as possible, providing that the general condition of the patient and of the soft parts allows it, since the stabilization in the brief space of time can help to improve the results. The anatomical reduction cannot grant a good result. An important number of patients had residual pain.

Humans , Joint Dislocations/surgery , Joint Dislocations/complications , Fractures, Bone/surgery , Fractures, Bone/complications , Fracture Fixation, Internal , Osteoarthritis , Radiography , Treatment Outcome , Edema/etiology , Necrosis/etiology
Acta ortop. mex ; 30(2): 57-60, mar.-abr. 2016. graf
Article in Spanish | LILACS | ID: biblio-837757


Resumen: La luxación de los tendones extensores a nivel metacarpofalángico (MCF) de los dedos es una alteración mecánica poco frecuente que se caracteriza por incompetencia o ruptura de la banda sagital (BS), estructura que estabiliza dichos tendones. Se manifiesta por desplazamiento cubital del tendón extensor (en raras ocasiones, la luxación es radial o divergente), que limita su función y puede causar dolor o chasquido. El diagnóstico se hace al observar el tendón extensor del lado cubital de la articulación MCF en flexión del dedo. El tratamiento debe ser conservador cuando el diagnóstico se efectúa en las primeras tres semanas. Se recomienda tratamiento quirúrgico cuando el diagnóstico es tardío. Existen varias técnicas de reparación quirúrgica. Material y métodos: Se revisaron bases de datos electrónicas (Ovid y Medline) en busca de artículos relacionados con esta patología. Se examinaron los casos de luxación de tendones extensores en zona V en nuestros pacientes. Resultados: Se encontraron 10 artículos y cuatro libros relacionados con esta patología. Analizamos 18 individuos con 21 lesiones de Abril de 1978 a Agosto de 2011; de ellos, 10 fueron hombres y ocho mujeres, con edad de 21 a 73 años (promedio, 47 años). El dedo más afectado fue el medio (con 13 casos), seguido del índice (con cinco casos), el meñique (con dos casos) y el anular (con un caso). Trece sujetos fueron tratados quirúrgicamente y ocho de forma conservadora. Las técnicas quirúrgicas utilizadas fueron: de Wheeldon en siete personas, combinación de reparación primaria con técnica de Wheeldon en cuatro casos, reparación primaria de la BS y técnica de Carroll en un paciente cada una. El seguimiento mínimo fue de un año y el más largo de 34 años (promedio, 17.5 años). Discusión: Las lesiones de tendones extensores en zona V son poco frecuentes. Cuando el diagnóstico es tardío, requieren tratamiento quirúrgico.

Abstract: Traumatic dislocation of the extensor tendon over the metacarpophalangeal (MCP) joint is a rare lesion that is caused by the dysfunction or rupture of the sagittal band, which is an important stabilizing structure of the extensor tendon. This mechanical alteration presents itself as instability that affects function and may cause pain or snapping during finger motion. The diagnosis is made when ulnar dislocation of the extensor tendon is observed over the MCP joint. Nonsurgical treatment is successful and should be attempted when injuries are diagnosed within the first three weeks. Several surgical repairs have been described. Material and methods: We searched medical databases (Ovid, Medline) for papers on extensor tendon dislocation. We also revised our own cases of this injury. Results: Our search resulted in 10 articles and four books. We found 18 patients with 21 injuries, 10 men and eight women. The most frequently affected finger was the middle one (in thirteen cases), followed by the index (in five cases), the fourth finger (in two cases) and the third one (in one case). Eight of our patients were treated conservatively and thirteen required surgical treatment. The surgical procedures performed were Wheeldon's in seven cases; primary repair of the sagittal band and Wheeldon in four cases; primary repair alone in one case; and Carroll's in one case. The follow-up was between one and 34 years (average: 17.5 years). Discussion: Extensor tendon dislocation in zone V is rare. When the diagnosis is made after three weeks of the lesion, the surgical treatment is recommended.

Humans , Male , Female , Tendon Injuries/surgery , Joint Dislocations/surgery , Metacarpophalangeal Joint/surgery , Metacarpophalangeal Joint/injuries , Tendons , Finger Phalanges/surgery , Finger Phalanges/injuries
Artrosc. (B. Aires) ; 23(3): 115-119, 2016. []
Article in Spanish | LILACS, BINACIS | ID: biblio-830970


Introducción: La elección del tratamiento quirúrgico de la luxación acromioclavicular, es aún motivo de controversia. En este trabajo se describe una técnica combinada: realizamos un primer tiempo artroscópico, y un segundo tiempo con abordaje mini invasivo. Material y Métodos: Se intervinieron 41 pacientes con luxación acromioclavicular grados III, IV y V. Para el seguimiento Se incluyeron luxaciones agudas, crónicas y cirugías de revisión; se excluyeron pacientes con otras patologías de hombro asociadas, obteniendo un total de 24 pacientes en el seguimiento final. Con una edad promedio de 28,6 años, 20 siendo del sexo masculino. Los pacientes fueron evaluados con el Score de Ucla, el Score de Constant, la evaluación del dolor mediante la Escala Visual Analógica (VAS) preoperatorio, a los 6 y 12 meses Postoperatorio. Resultados: Obtuvimos un Score de Constant preoperatorio de 41,3;: 89.4 a los 6 meses; 92.3 al año. El Score de UCLA, respectivamente: 21.7; 29.1; 31.4 Preoperatorio, a los 6 y 12 meses respectivamente. VAS: 8,4; 2,3; 1,2. Hubo 2 casos de reruptura por trauma y un caso de insatisfacción estética de la cicatriz. Conclusión: Esta técnica brinda una reconstrucción anatómica sólida, estable en plano coronal y axial, combinando dos métodos de reducción, uno sintético y otro biológico, donde el primero aporta la resistencia adecuada hasta la revascularización e integración del aloinjerto, con muy buenos resultados a mediano plazo. Tipo de estudio: Serie de casos. Nivel de evidencia: IV.

Introduction: The optimal surgical technique of AC jont dislocations is still controversial. This paper describes a combined reconstructive technique wich involves a first arthroscopic step, and a second one with minimally invasive approach. Meterials and methods: We performed 41 interventions in patients with acromioclavicular dislocation grade III, IV and V. Acute and chronic dislocations and revision surgeries were included. We excluded patients with other associated pathologies that may cause shoulder pain or function limitation, leaving 24 cases for the final sample. The average age was 28.6 years. 20 patients were male. We use UCLA, VAS and Constant scores before the procedure, and in the postoperative period at 6 and 12 months. Results: The scores achieved the following results: Constant preoperative 41.3; 6 months: 89.4; and 12 months: 92.3. UCLA, respectively: 21.7; 29.1; 31.4. VAS: 8,4; 2,3; 1,2. A case of an esthetic dissatisfaction and two traumatic ruptures were reported. Conclusions: This technique provides a solid, stable and anatomical reconstruction in both axial and coronal planes. It involves two reduction methods, synthetic and biological, where the first one provides adequate strength until allograft revascularization and integration occurs, with goods results in the medium term. Type of Study: Case series. Level of evidence: IV.

Adult , Acromioclavicular Joint/surgery , Acromioclavicular Joint/injuries , Shoulder Joint/surgery , Arthroscopy/methods , Joint Dislocations/surgery , Minimally Invasive Surgical Procedures , Treatment Outcome
Acta ortop. mex ; 29(2): 118-122, mar.-abr. 2015. ilus
Article in Spanish | LILACS | ID: lil-771825


La luxación de codo en niños es un evento traumático muy poco frecuente descrito por primera vez por Stimson en 1900 y por Tachdjian en 1990, con una incidencia estimada que va de 3 a 6% de todas las lesiones en codo, con un pico de incidencia entre los 13 y 14 años, el trauma de codo se clasifica basándose en la dirección que toma el desplazamiento de la articulación radio ulnar proximal con el húmero, dividiéndolas en luxaciones posteriores y anteriores, siendo la primera más frecuente, ocurriendo en 95% de los casos, por otra parte las luxofracturas del codo son eventos aún más raros presentándose fractura por avulsión del epicóndilo medial con una incidencia de 25 a 36%; cóndilo lateral 4%, olécranon 1.7%, cabeza radial 8%, apófisis coronoides 3.5%, y otras 3.5%, hasta el momento no existe en la literatura un consenso sobre cómo manejar este tipo de lesiones, en especial porque hay autores que respaldan el manejo no quirúrgico, y otros que proponen el manejo quirúrgico como método definitivo; sin embargo, lo que sí se tiene claro es que un diagnóstico tardío o un manejo inoportuno puede repercutir en el crecimiento del niño llevando a serias complicaciones, de esta manera con el presente estudio pretendemos dar a reconocer nuestra experiencia en el manejo quirúrgico de estos casos tan poco frecuentes obteniendo buenos resultados.

Elbow dislocation in children is a very infrequent traumatic event which was first described by Stimson in 1900 and then by Tachdjian in 1990. Its estimated incidence ranges from 3% to 6% of all elbow injuries, peaking at 13-14 years. Elbow trauma is classified considering the direction in which the proximal radioulnar joint shifts with respect to the humerus, into posterior and anterior dislocation. The former is the most frequent and accounts for 95% of cases. Elbow fracture dislocation is an even rarer event. The incidence rate of avulsion fracture of the medial epicondyle is 25-36%, of the lateral condyle 4%, of the olecranon 1.7%, of the radial head 8%, of the coronoid process 3.5%, and others, 3.5%. At present there is no consensus in the literature on how to treat this type of lesions, particularly because some authors advocate nonsurgical management, while others propose surgical management as the definitive treatment. What is clear, however, is that a late diagnosis or untimely treatment may affect the child's growth and lead to serious complications. The purpose of this study is to share our experience and good results with the surgical management of these infrequent cases.

Child , Child, Preschool , Female , Humans , Joint Dislocations/pathology , Elbow/injuries , Fractures, Bone/pathology , Joint Dislocations/diagnosis , Joint Dislocations/surgery , Elbow/pathology , Elbow/surgery , Fractures, Bone/diagnosis , Fractures, Bone/surgery
Acta ortop. mex ; 28(6): 369-373, nov.-dic. 2014. ilus
Article in Spanish | LILACS | ID: lil-745198


La luxación traumática del codo en la población pediátrica es un evento particularmente raro, descrito por primera vez por Stimson en 1900 y casi 100 años después retomada por Tachdjian en 1990, asociándose en 3% de las veces con fractura del epicóndilo lateral, constituyendo de esta manera una patología poco frecuente que ha sido descrita en contadas publicaciones como reportes de caso, no conociéndose claramente el mecanismo del trauma, el manejo que debe hacerse para estos pacientes ni las complicaciones derivadas; de esta manera presentamos el caso de una niña de cinco años con luxofractura de epicóndilo lateral manejada con reducción cerrada y fijación percutánea con clavos de Kirschner y con buenos resultados funcionales...

Traumatic elbow dislocation in the pediatric population is a particularly unusual injury. It was first described by Stimson in 1900 and almost 100 years later revisited by Tachdjian in 1990. Three percent of cases are associated with lateral epicondyle fracture, so this is an infrequent injury that has been described in only a few papers as case reports. The mechanism of injury is not clearly known, nor is the best type of treatment or its complications. We report herein the case of a five year-old girl with fracture dislocation of the lateral epicondyle who was managed with closed reduction and percutaneous fixation with Kirschner nails, with good functional results...

Child, Preschool , Female , Humans , Joint Dislocations/complications , Elbow/injuries , Fractures, Bone/complications , Joint Dislocations , Joint Dislocations/surgery , Elbow , Elbow/surgery , Fractures, Bone , Fractures, Bone/surgery
Clinics ; 69(11): 750-757, 11/2014. tab, graf
Article in English | LILACS | ID: lil-731106


OBJECTIVES: The transoral atlantoaxial reduction plate system treats irreducible atlantoaxial dislocation from transoral atlantoaxial reduction plate-I to transoral atlantoaxial reduction plate-III. However, this system has demonstrated problems associated with screw loosening, atlantoaxial fixation and concealed or manifest neurovascular injuries. This study sought to design a set of individualized templates to improve the accuracy of anterior C2 screw placement in the transoral atlantoaxial reduction plate-IV procedure. METHODS: A set of individualized templates was designed according to thin-slice computed tomography data obtained from 10 human cadavers. The templates contained cubic modules and drill guides to facilitate transoral atlantoaxial reduction plate positioning and anterior C2 screw placement. We performed 2 stages of cadaveric experiments with 2 cadavers in stage one and 8 in stage two. Finally, guided C2 screw placement was evaluated by reading postoperative computed tomography images and comparing the planned and inserted screw trajectories. RESULTS: There were two cortical breaching screws in stage one and three in stage two, but only the cortical breaching screws in stage one were ranked critical. In stage two, the planned entry points and the transverse angles of the anterior C2 screws could be simulated, whereas the declination angles could not be simulated due to intraoperative blockage of the drill bit and screwdriver by the upper teeth. CONCLUSIONS: It was feasible to use individualized templates to guide transoral C2 screw placement. Thus, these drill templates combined with transoral atlantoaxial reduction plate-IV, may improve the accuracy of transoral C2 screw placement and reduce related neurovascular complications. .

Adult , Humans , Atlanto-Axial Joint/injuries , Bone Screws , Cervical Vertebrae/surgery , Joint Dislocations/surgery , Orthopedic Procedures/instrumentation , Bone Plates , Cadaver , Equipment Design , Feasibility Studies , Imaging, Three-Dimensional , Internal Fixators , Medical Illustration , Orthopedic Procedures/methods , Reference Values , Reproducibility of Results , Tomography, X-Ray Computed