Tratamiento mínimamente invasivo/percutáneo de fracturas de pilón tibial con asistencia artroscópica en Hospital Regional de Talca / Minimally invasive/percutaneous treatment of tibial pilon fractures with arthroscopic assistance at the Regional Hospital

Tibial pilon fractures are a complex injury to treat due to the great involvement of soft and bone tissues. The classic surgical treatment is based on open reduction with internal fixation (ORIF), adding morbidity to the soft tissues, increasing the risk of complications. This has motivated the development of minimally invasive and/or percutaneous techniques to reduce complications, and with the advent of arthroscopy, achieve anatomical reductions. METHODS: A retrospective observational study of twelve patients with tibial pilon fractures who were treated in our center with minimally invasive and/ or percutaneous osteosynthesis with arthroscopic support was carried out between January 2019 and June 2021. Fractures were characterized using the AO/OTA classification for tibial pilon. Age, sex, fracture mechanism, exposure and initial management in the emergency department (cast immobilization or external fixation), definitive treatment, complications and clinical and functional evaluation twelve months after definitive osteosynthesis. For this last point, plantar flexion, dorsiflexion and the AOFAS and FAOS Score were measured. RESULTS: The operated patients were 12, 8 were men (67%) and 4 were women (33%). The average age was 49 (17-68) years. The definitive treatment was carried out after an average of 8 days (5-12 days). Surgical treatment schemes were as follows: percutaneous osteosynthesis with medial anatomical plate and arthroscopic support (OPAA), minimally invasive osteosynthesis with cannulated screws and arthroscopic support (OMIAA) and osteosynthesis with external circular guide and arthroscopic support (OTCAA). In the AOFAS Score, three patients had excellent results (≥ 90 points), 6 patients had good results (≥ 80 points) and 3 patients had acceptable results (≥ 70 points). In the FAOS Score, eight patients had over 80% (good results) and 4 patients had over 60% (accep - table results). DISCUSSION: Historically, tibial pilon fractures have been considered non-reconstructable and with poor long-term results. Initially this paradigm changed with the principles of Rüedi for the reconstruction of the tibial pilon and improve the results. ORIF has been widely used until today, it allows achieving an anatomical joint reduction, it allows to give stability and length to the fibula, graft contribution and sta - bilization with the medial plate. Today this concept is changing again, since the emphasis is on the care of the soft tissues to allow a better recovery of the patient and reduce the complications of the classic approach, it is in this context that the appearance of minimally invasive and/or percutaneous techniques with arthroscopic assistance has allowed us to have excellent functional and clinical results with less da - mage to the soft tissues. CONCLUSION: The proper management and care of the soft tissues in a high-energy fracture of the tibial pilon is essential to obtain favorable clinical results and thus achieve restoration of ankle function. Percutaneous and minimally invasive management has optimized management of the tibial pilon, redu - cing the rates of complications, amputation, and pri - mary arthrodesis.

Resultados a corto plazo del tratamiento de fracturas de cadera en población infantil / Short-term results of the treatment of hip fractures in children

INTRODUCCIÓN Las fracturas del fémur proximal pediátricas son infrecuentes, se asocian a traumas de alta energía, y presentan complicaciones devastadoras. La mayoría de los casos se tratan en forma quirúrgica utilizando diversos tipos de fijación. El objetivo de este estudio es reportar los resultados de una serie de casos de pacientes quirúrgicos en dos hospitales de referencia en Chile. MATERIALES Y MÉTODOS Serie de casos tratados entre el 2004y el 2018, en la que se incluyeron pacientes pediátricos con diagnóstico de fractura de fémur proximal que fueron operados. Se realizó estadística descriptiva de las variables demográficas, la energía del accidente, la clasificación según Delbet, el tipo de tratamiento, la técnica de osteosíntesis, la aparición de complicaciones, y la evaluación clínico-radiológica. RESULTADOS Se evaluaron 17 casos, de los cuales un 76,5% fueron secundarios a accidentes de alta energía. La mediana de edad de la muestra fue de 7 años, y había un 58,8% de niñas. Hubo 3 casos de tipo II en la clasificación de Delbet, 9 de tipo III, y 5 de tipo IV. Como método de fijación, se utilizaron tornillos canulados (9 casos), placa de compresión de bloqueo (locking compression plate, LCP, en inglés; 5 casos), tornillo dinámico de cadera (dynamic hip screw, DHS, en inglés; 2 casos), y placa de compresión dinámica (dynamic compression plate, DCP, en inglés; 1 caso). La mediana de seguimiento fue de 2,3 años (rango: 0,5 a 12,8 años). Se presentaron complicaciones: coxa vara en un caso, y discrepancia de longitud de extremidades inferiores en otro caso, y no hubo osteonecrosis. Se realizó retiro de osteosíntesis en siete pacientes. Se obtuvieron buenos resultados en todos los pacientes según los criterios de Ratliff. CONCLUSIONES La mayoría de las fracturas se asociaron a traumas de alta energía, siendo el tipo más frecuente el III de Delbet. Todos los pacientes fueron tratados en forma quirúrgica, con buenos resultados, sin observar osteonecrosis.

INTRODUCTION Pediatric hip fractures are infrequent, associated with high-energy trauma, and present devastating complications. Most cases are treated surgically using different types of fixation. The objective of the present study is to report the results of a series of cases of surgical patients in two reference hospitals in Chile. MATERIALS AND METHODS A case series which included pediatric patients diagnosed with hip fractures and treated surgically between 2004 and 2008. We performed descriptive statistics for the demographic variables, the energy of the accident, the Delbet classification, the type of treatment, the osteosynthesis technique, of complications, and the clinico-radiological evaluation according to evaluation. RESULTS A total of 17 cases were evaluated, 76.5% of which were secondary to high-energy accidents. The median age of the sample was of 7 years, and it was composed of 58.8% of girls. There were 3 cases of Delbet type II, 9 of type III, and 5 of type IV. As fixation method, we used cannulated screws (9 cases), locking compression plates (LCPs; 5 cases), dynamic hip screws (DHSs; 2 cases), and dynamic compression plates (DCPs; 1 case). The median follow-up was of 2.3 years (range: 0.5 to 12.8 years). Complications were observed: coxa vara in one case, and discrepancy in the length of the lower extremities in another case, and there were no cases of osteonecrosis. Osteosynthesis removal was performed in seven patients. Good results were obtained in all patients according to Ratliff criteria. CONCLUSIONS Most fractures were associated with high energy trauma, with the most frequent being type III on the Delbet classification. All the patients were treated surgically, with good results, with no cases of osteonecrosis.

Uso de placa malla en el manejo de fracturas conminutas de patela: reporte de caso / Use of mesh plate for the treatment of comminuted patellar fractures: case report

OBJETIVOS Describir la técnica quirúrgica para el uso de placa malla en un caso de fractura conminuta de patela y sus resultados en el seguimiento a mediano plazo. MATERIALES Y MÉTODOS Presentamos un caso de fractura conminuta de patela manejada con el uso de una placa malla y un tornillo canulado asociado, evitando de esta forma la patelectomía parcial y sus posibles complicaciones. RESULTADOS El paciente presentó una evolución satisfactoria, con rango de movimiento de rodilla completo y en condiciones de alta laboral a los cuatro meses desde la cirugía, sin complicaciones ni reintervenciones. DISCUSIÓN El uso de placas malla permite el manejo de fracturas conminutas de patela preservando stock óseo y restaurando la indemnidad del aparato extensor, con una osteosíntesis estable y poco prominente. Casos en que antiguamente la única alternativa era la patelectomía parcial y reinserción del tendón patelar ahora tienen etas placas como opción de manejo. CONCLUSIÓN El uso de placas malla en fracturas conminutas de patela es una alternativa atractiva por la estabilidad que brindan, la capacidad de reservar stock óseo, y la baja tasa de reintervenciones

OBJETIVE To describe the surgical technique for the use of a mesh plate in a case of comminuted patellar fracture and the mid-term follow up outcomes. MATERIALS AND METHODS We present a case of comminuted patella fracture managed with the use of a mesh plate and an associated cannulated screw, thus avoiding partial patellectomy and its possible complications. RESULTS Four months postoperatively, the patient presented full knee range of motion and could be discharged to return to work, with no complications or reinterventions. DISCUSSION The use of mesh plates enables the management of comminuted patellar fractures preserving bone stock and restoring the extensor mechanism with a stable and little prominent osteosynthesis. Cases which previously would only have been treated by partial patellectomy and patellar tendon reinsertion can be treated with these plates. CONCLUSION The use of mesh plates for comminuted patellar fractures is an attractive option due to their stability, their ability to preserve bone stock, and the low rates of reintervention.

Management of diacapitular mandibular condyle fracture using a single lag screw fixation: case report / Manejo de fractura de cóndilo mandibular diacapitular mediante fijación con tornillo de tracción único: reporte de caso

Introduction: Mandibular fractures are the most common facial fractures affecting various anatomical sites of the mandible. Among the various mandibular fractures, management of condylar fractures remains a challenging task for surgeons. Case Report: We report the case of a 28 year old male patient who presented with pain in the chin and restricted mouth opening. Computed tomography revealed a sagittal fracture of the right condylar head with medial displacement of the fractured fragments. Management of diacapitular fractures includes open reduction and internal fixation of the right condyle using a single lag-screw. Results: The postoperative outcomes were favorable, where normal mandibular movements, desired dental occlusion and exact positioning of the condyle with rigid fixation were established thereby maintaining the shape of the condyle. Conclusion: Use of single lag screw fixation is highly recommended as it greatly supports the stabilized fracture fragments and also aid in prevention of fracture fragment rotation medially.

Introducción: Las fracturas mandibulares son las fracturas faciales más comunes que afectan a diversos sitios anatómicos de la mandíbula. Entre las diversas fracturas mandibulares, el manejo de las fracturas condilares sigue siendo una tarea desafiante para los cirujanos. Reporte del Caso: Presentamos el caso de un paciente masculino de 28 años que consultó por dolor en el mentón y restricción de la apertura de la boca. La tomografía computarizada reveló una fractura sagital de la cabeza condilar derecha con desplazamiento medial de los fragmentos fracturados. El tratamiento de las fracturas diacapitulares incluye la reducción abierta y la fijación interna del cóndilo derecho con un solo tirafondo. Resultados: Los resultados postoperatorios fueron favorables, donde se establecieron los movimientos mandibulares normales, la oclusión dentaria deseada y el posicionamiento exacto del cóndilo con fijación rígida manteniendo así la forma del cóndilo. Conclusión: Se recomienda encarecidamente el uso de una fijación con un solo tornillo de tracción, ya que soporta en gran medida los fragmentos de fractura estabilizados y también ayuda a prevenir la rotación medial de los fragmentos de fractura.

Luxofractura compleja del codo con compromiso del húmero distal: reporte de caso clínico / Complex elbow fracture-dislocation with distal humerus involvement: clinical case report

Es conocido que el codo se disloca con frecuencia, y corresponde a la primera causa de luxación en niños y a la segunda causa en adultos. Respecto a las fracturas distales, representan un tercio de todas las fracturas del húmero en población adulta. Por lo general, se presentan en una distribución bimodal que afecta a hombres jóvenes o a mujeres ancianas. En este artículo, reportamos un caso clínico poco frecuente de luxación de codo izquierdo complicada, producto de fractura del húmero distal, en una mujer de 64 años. La lesión comprende una luxación posterolateral de codo izquierdo complicada con fractura articular parcial (compromiso del cóndilo y de la tróclea humeral externa), sagital, multifragmentaria, de húmero distal que requirió tres intervenciones quirúrgicas y terapia de rehabilitación por seis meses que finalizaron en recuperación funcional de la estabilidad de la articulación del codo. El caso reportado es particular debido a la individualidad del paciente con sus comorbilidades, el mecanismo de producción de la luxofractura, el abordaje quirúrgico, y el éxito del tratamiento instaurado. Sin embargo, este éxito terapéutico debe ser confirmado en series de casos

It is known that the elbow is dislocated frequently, representing the first cause of dislocation in children and the second cause in adults. Regarding distal humerus fractures, they represent a third of all humerus fractures in the adult population. They generally occur in a bimodal distribution, affecting young men or elderly women. In the present article, we report a rare clinical case of a complicated left elbow dislocation due to a distal humerus fracture in a 64-year-old woman. The lesion includes a posterolateral dislocation of the left elbow complicated by a sagittal, multifragmentary, partial articular fracture (compromise of the condyle and external humeral trochlea) of the distal humerus which required three surgical interventions and rehabilitation therapy for six months and resulted in functional recovery of the stability of the elbow joint. The case herein reported is particular due to the individuality of the patient, with her comorbidities, the mechanism of production of the fracture-dislocation, the surgical approach, and the success of the established treatment. This therapeutic success must be confirmed in series of cases

Principios y recursos clásicos y modernos: combinación en el manejo de fracturas tipo Le Fort / Classical and modern principles and resources: their combination in the management of Le Fort fractures

Introducción: Las lesiones traumáticas maxilofaciales son un problema de salud importante en todo el mundo. Suponen una carga para la salud pública. Objetivo: Reflexionar sobre la necesidad de combinar en el contexto cubano principios y recursos clásicos y modernos en el manejo de fracturas tipo Le Fort. Comentarios principales: El tratamiento de las fracturas faciales ha evolucionado mucho a lo largo de los años. Tradicionalmente, el alambre de acero inoxidable se utilizaba para la osteosíntesis en cirugía maxilofacial hasta la aparición de las miniplacas. Los sistemas de osteosíntesis de titanio son actualmente los de elección en cirugía maxilofacial. A pesar de sus ventajas indiscutibles, en los países en desarrollo ocasionalmente no se cuenta con todo el equipamiento necesario para su empleo. Consideraciones globales: El manejo del trauma maxilofacial se centra en la reobtención de la forma y la función original de la región afectada. Sin vulnerar los principios teóricos de manejo de fracturas tipo Le Fort, se impone de los profesionales cubanos la búsqueda de soluciones en concordancia con la disponibilidad de recursos. La unión de técnicas clásicas y recursos modernos como las suspensiones craneofaciales alámbricas, los arcos barra y los tornillos de fijación maxilomandibular puede ser una alternativa terapéutica confiable(AU)

Introduction: Traumatic maxillofacial lesions are an important global health problem, as well as a public health burden. Objective: Reflect on the need to combine classical and modern principles and resources in the management of Le Fort fractures in the Cuban context. Main remarks: Treatment of facial fractures has evolved considerably through the years. Before the appearance of miniplates, stainless steel wire was used for osteosynthesis in maxillofacial surgery. Titanium osteosynthesis systems are currently the systems of choice in maxillofacial surgery. Despite their undeniable advantages, developing countries occasionally do not have all the equipment required for their use. General considerations: Management of maxillofacial trauma is aimed at recovering the original form and function of the affected area. Without disregarding the theoretical principles of the management of Le Fort fractures, Cuban professionals should search for solutions in keeping with the resources available. The combination of classical techniques and modern resources, such as wired craniofacial suspensions, bar arches and maxillomandibular fixation screws, may be a reliable therapeutic alternative(AU)

Research of Building 3D Model in External Fixator for Proximal Femoral Fracture Based on Locking Plate Shape / 中国医疗器械杂志

The software of 3D-Modeling(UG NX 10.0) was used to design a new external fixator model for proximal femoral fracture, and fresh femoral cadaver specimens were used to simulate experimental operation. The results showed that the external fixator designed with the proximal femoral locking plate shape can improve the accuracy of Kirschner wire penetration into the femoral neck, reduce fluoroscopic and soft tissue incision injuries, and make a good stability and is easy to operate, which has a certain value for patients with proximal femoral fracture, such as intolerant surgery and poor physical condition.

Virtual surgical planning is a useful tool in the surgical management of mandibular condylar fractures / 中华创伤杂志(英文版)

PURPOSE@#The aim of this study is to evaluate the application value of virtual surgical planning in the management of mandibular condylar fractures and to provide a reliable reference.@*METHODS@#This was a prospective randomized controlled study and recruited 50 patients requiring surgical treatment for their mandibular condylar fractures. The inclusion criteria were patients (1) diagnosed with a condylar fracture by two clinically experienced doctors and required surgical treatment; (2) have given consent for the surgical treatment; and (3) had no contraindications to the surgery. Patients were excluded from this study if: (1) they were diagnosed with a non-dislocated or only slightly dislocated condylar fracture; (2) the comminuted condylar fracture was too severe to be treated with internal reduction and fixation; or (3) patients could not complete follow-up for 3 months. There were 33 male and 17 female patients with 33 unilateral condylar fractures and 17 bilateral condylar fractures included. The 50 patients were randomly (random number) divided into control group (25 patients with 35 sides of condylar fractures) and experimental group (25 patients with 32 sides of condylar fractures). Virtual surgical planning was used in the experimental group, but only clinical experience was used in the control group. The patients were followed up for 1, 3, 6 and 12 months after operation. Variables including the rate of perfect reduction by radiological analysis, the average distance of deviation between preoperative and postoperative CT measurements using Geomagic software and postoperative clinical examinations (e.g., mouth opening, occlusion) were investigated for outcome measurement. SPSS 19 was adopted for data analysis.@*RESULTS@#The average operation time was 180.60 min in the experimental group and 223.2 min in the control group. One week postoperatively, CT images showed that the anatomic reduction rate was 90.63% (29/32) in the experimental group and 68.57% (24/35) in the control group, revealing significant difference (X2 = 4.919, p = 0.027). Geomagic comparative analysis revealed that the average distance of deviation was also much smaller in the experimental group than that in the control group (0.639 mm vs. 0.995 mm; t = 3.824, p < 0.001).@*CONCLUSION@#These findings suggest that virtual surgical planning can assist surgeons in surgical procedures, reduce operative time, and improve the anatomic reduction rate & accuracy, and thus of value in the diagnosis and treatment of condylar fractures.

Bilateral triceps tendon approach is flexible and efficient in the treatment of type C distal humerus fractures / 中华创伤杂志(英文版)

PURPOSE@#The purpose of this study was to assess and compare elbow range of motion, triceps extension strength and functional results of type C (AO/OTA) distal humerus fractures treated with bilateral triceps tendon (BTT) approach and olecranon osteotomy (OO). At the same time, we are also trying to know whether BTT approach can provide sufficient vision for comminuted intra-articular fractures of the distal humerus, and whether it is convenient to convert to the treatment to total elbow arthroplasty (TEA) or OO.@*METHODS@#Patients treated with OO and BTT approaches for type C distal humerus fractures between July 2014 and December 2017 were retrospectively reviewed. Inclusion criteria include: (1) patients' age were more than 18 years old, (2) follow-up was no less than 6 months, and (3) patients were diagnosed with type C fractures (based on the AO/OTA classification). Exclusion criteria include: (1) open fractures (Gustillo type 2 or type 3), (2) treated by other approaches, and (3) presented with combined injuries of ipsilateral upper extremities, such as ulnar nerve. Elbow range of motion and triceps extension strength testing were completely valuated, when the fractures had healed. Assessment of functional results using the Mayo elbow performance score and complications were conducted in final follow-up. The data were compared using the two tailed Student's t-test. All data were presented as mean ± standard deviation.@*RESULTS@#Eighty-six patients of type C distal humerus fractures, treated by OO and BTT approach were retrospectively reviewed between July 2014 and December 2017. Fifty-five distal humerus fractures (23 males and 32 females, mean age 52.7 years) treated by BTT approach or OO were included in this study. There were 10 fractures of type C1, 16 type C2 and 29 type C3 according to the AO/OTA classification. Patients were divided into two surgical approach groups chosen by the operators: BTT group (28 patients) and OO group (27 patients). And the mean follow-up time of all patients was 15.6 months (range, 6-36 months). Three cases in BTT group were converted to TEA, and one converted to OO. Only one case in BTT group presented poor articular reduction with a step more than 2 mm. There were not significantly different in functional outcomes according to the Mayo elbow performance score, operation time and extension flexion motion are values between BTT group and OO group (p > 0.05). Complications and reoperation rate were also similar in the two groups. Triceps manual muscle testing were no significant difference in the two groups, even subdivided in elder patients (aged >60 years old).@*CONCLUSION@#BTT is a safe approach to achieve similar functional result comparing with OO. BTT were not suitable for every case with severe comminuted pattern, but it avoids the potential complications related to OO, and has no complications concerning with triceps tendon. It is convenient for open reduction internal fixation and flexible to be converted to OO, as well as available to be converted to TEA in elder patients.

Comparative study between intramedullary interlocking nailing and minimally invasive percutaneous plate osteosynthesis for distal tibia extra-articular fractures / 中华创伤杂志(英文版)

PURPOSE@#Treatment of distal tibia fractures poses significant challenge to orthopedic surgeon because of poor blood supply and paucity of soft tissue coverage. There is considerable controversy regarding the superior option of treatment for distal tibia fracture between the minimally invasive percutaneous plate osteosynthesis (MIPPO) technique and intramedullary interlocking (IMIL) nailing for extra-articular distal tibia fractures. The aim of our study is to compare the functional outcome between the two treatment methods.@*METHODS@#This was the prospective comparative study of 100 patients with distal third tibia fractures divided into two groups. The first group of patients were treated with MIPPO technique while the second group of patients were managed by IMIL nailing. Patients were followed up in outpatient department to assess the functional outcomes, malunion, delayed union, nonunion, superficial and deep infection between the two groups. Statistical analyses were performed using the SPSS software (version 16.0).@*RESULTS@#Average malunion (degrees) in the MIPPO group was 5 (3-7) ± 1.41 vs. 10.22 (8-14) ± 2.04 in the IMIL group (p = 0.001). Similarly postoperative knee pain in the IMIL group was 10% vs. 2% in the MIPPO group (p = 0.001). In terms of superficial infection and nonunion, the results were 8% vs. 4% and 2% vs. 6% for the MIPPO and IMIL group, respectively (p = 0.001).@*CONCLUSION@#Both procedures have shown the reliable method of fixation for distal extra-articular tibia fractures preserving the soft tissue, bony vascularity and fracture hematoma that provide a favourable biological environment for fracture healing. Considering the results of the study, we have slightly more preference for the MIPPO technique.

Treatment of abduction and insertion femoral neck fracture with closed reduction technique / 中国骨伤

OBJECTIVE@#To explore feasibility of closed reduction technique under monitoring of C-arm and three screws in the fixation of abduction and insertion femoral neck fracture.@*METHODS@#Seventeen patients with abduction and insertion femoral neck fracture operated from January 2014 to December 2019 were analyzed retrospectively, including 10 males and 7 females, aged from 21 to 59(42.09±7.30) years old. According to preoperative X-ray and CT data, angle of retroversion and abduction displacement of femoral head were determined. Two 2 mm diameter Kirschner wires crossed and gently knocked into the bone of the acetabular roof from outside and front of femoral head. The proximal fracture segment was fixed on the acetabulum. Under the monitoring of C-arm, lower limb (distal fracture segment) was gradually rotated inward and retracted against direction of fracture displacement, three cannulated screws were used for internal fixation after anatomical reduction of the distal fracture end and the proximal fracture end. Garden index was evaluated, postoperative complications were observed, and Harris functional score was performed.@*RESULTS@#All 17 cases of femoral neck fracture with abduction and insertion were successfully completed closed reduction and internal fixation. The operation time was 36 to 68(43.87±7.63) min and intraoperative bleeding was 15 to 50(28.36±5.93) ml. The quality of fracture reduction was evaluated by garden index during operation. There were 12 cases of anatomical reduction, 5 cases of acceptable reduction, and no cases of unsuccessful reduction were changed to open reduction. 17 cases were followed up for 3 to 41(27.5±8.4) months. There were no complications such as femoral head necrosis, fracture nonunion, hip impingement and femoral neck shortening. MR examination showed no femoral head necrosis and articular cartilage injury. Two years after operation, Harris score of hip joint was excellent in 13 cases and good in 4 cases.@*CONCLUSION@#Closed reduction and three screws internal fixation can obtain good anatomical reduction rate and therapeutic effect in the treatment of abduction and insertion femoral neck fracture.

Fixation of anterior pelvic ring fracture with long reconstruction plate combined with MIPPO technique / 中国骨伤

OBJECTIVE@#To evaluate the efficacy of long reconstruction plate combined with minimally invasive percutaneous plate osteosynthesis(MIPPO) technique in the treatment of unstable pelvic anterior ring fractures.@*METHODS@#From January 2013 to February 2019, 16 patients with unstable pelvic fracture were treated, including 12 males and 4 females, aged from 20 to 60 years(mean 46.5 years). According to Tile classification, there were 4 cases of type B1, 6 cases of type B2, 4 cases of type C1 and 2 cases of type C2. The fracture of all patients was closed, and the time from injury to operation was 7 to 10 days with an average of 6.2 days. The operation time, intraoperative blood loss, fracture reduction quality, fracture healing time, complications and limb function during the final follow-up were evaluated in 16 patients.@*RESULTS@#All 16 patients were followed up for 12 to 23 months (mean 19.1 months). The operation time was 60 to 180 min (mean 107.8 min). The intraoperative blood loss was 120 to 600 ml (mean 368.1 ml). The fracture healing time was 12 to 20 weeks (mean 16.3 weeks). According to Matta criteria, the fracture reduction was excellent in 6 cases, good in 8 cases and fair in 2 cases. One patient suffered from lateral femoral cutaneous nerve injury during the operation, and the lateral thigh sensation decreased after operation, which recovered after 6 months. One patient had pain stimulated by internal fixation at the iliac fossa. The symptoms were improved after the internal fixation was removed. The fractures of 16 patients were healed satisfactorily and there was no internal fixation loosening. Majeed score at the final follow-up was 67 to 95, excellent in 10 cases, good in 4 cases and fair in 2 cases.@*CONCLUSION@#Closed reduction and fixation of pelvic anterior ring fracture with long reconstruction plate combined with MIPPO technique through anterior approach has the advantages of less injury, less bleeding time during operation, saving operation time, high intraoperative safety, high fracture healing rate, early functional exercise after operation, and effective treatment of pelvic anterior ring fracture.

Effect of computer virtual technique combined with pelvic reduction frame in the treatment of type C pelvic fracture / 中国骨伤

OBJECTIVE@#To investigate the short-term clinical effect of the computer virtual technique combined with pelvic reduction frame in the treatment of complex pelvic fractures.@*METHODS@#Thirty patients with Tile C pelvic fractures treated by percutaneous minimally invasive pelvic reduction frame from April 2018 to April 2020 were retrospectively analyzed, including 21 males and 9 females, aged from 19 to 57 (39.40±9.85) years old. The patient's pelvic CT DICOM data were imported into Mimics software to reconstruct the virtual fracture model. Virtual reduction and nail placement were carried out on the fracture model, and then simulated fluoroscopy was carried out to record the ideal fluoroscopy orientation and angle to guide the correct fluoroscopy during operation. The operation time, fluoroscopy times and intraoperative blood loss were recorded. The quality of fracture reduction was evaluated by Matta image score standard, and the postoperative function was evaluated by Majeed function score standard.@*RESULTS@#All 30 patients achieved closed reduction and percutaneous screw fixation. According to Matta score, the excellent and good rate of fracture reduction was 93.3%(28/30). A total of 67 channel screws were inserted, and the excellent and good rate was 98.5%(66/67). The operation time was (173.54±79.31) min, fluoroscopy time was (90.81±41.11) times, intraoperative blood loss was (81.21±43.97) ml. All incisions healed at one stage without broken nails or re-displacement of fractures. All patients were followed up for 12 months. At the final follow-up, Majeed function score was 73 to 94(85.66±5.33) scores.@*CONCLUSION@#Computer virtual technology combined with pelvic reduction frame could rapidly, accurately and safely reduce and fix unstable pelvic fractures. Computer virtualization could help surgeons to recognition and understanding pelvic fractures, pelvic reduction frame could improve the surgeon's ability to manage complex and unstable pelvic injuries.

Intraoperative assisted O-arm navigation imaging for unstable pelvic fractures in INFIX / 中国骨伤

OBJECTIVE@#To investigate the effect of internal external fixator assisted O-arm navigation imaging in the treatment of unstable pelvic fractures.@*METHODS@#From May 2019 to November 2019, 15 patients with unstable pelvic fractures were treated by intraoperative O-arm navigation imaging using INFIX technology. There were 6 males and 9 females. The age ranged from 24 to 66 years old. The course of disease ranged from 2 to 14 days. According to Tile classification, there were 1 case of B1 type, 8 cases of B2 type, 3 cases of C1 type, and 3 cases of C2 type. According to Young-Burgess classification, there were 8 cases of LC, 1 case of APC, 4 cases of VS, 2 cases of CM. Preoperative routine pelvic anteroposterior film, entrance position, exit position and pelvic CT three-dimensional reconstruction were performed. Intraoperative O-arm navigation system three-dimensional reconstruction and triplane scanning imaging were used to evaluate the effect of intraoperative reduction. The anterior pelvic ring was fixed with internal external fixator, and the posterior ring was fixed with sacroiliac screw, plate screw or lumbar iliac screw. The operation time, intraoperative bleeding and nail placement were observed and recorded. The quality of fracture reduction was evaluated by Matta standard, and the postoperative function was evaluated by Majeed function score.@*RESULTS@#Wound healing was good in all patients without vascular, nerve and local irritation complications. All the 15 patients were followed up for 10 to 16 months. The fracture reduction was evaluated according to the Matta scoring standard, 9 cases were excellent results, 5 cases were good, and 1 case was medium. The Majeed functional score was 0 to 95 points.@*CONCLUSION@#The built-in external fixator assisted O-arm navigation imaging system in the treatment of unstable pelvic fractures. The reduction effect is evaluated in advance, the operation time is shortened, and the accuracy of internal fixation is improved. The operation is simple, safe and less bleeding. The operation is in line with the principles of minimally invasive medical treatment and precision medical treatment in orthopedics, which is conducive to the recovery of patients' postoperative function and rapid recovery.

Progress in the research of medial column reconstruction of proximal humerus fractures in the elderly / 中国骨伤

The proximal medial column of the humerus is a continuous cortical region in the inner and lower part of the humerus head, which has attracted more and more attention in clinical and scientific research since it was proposed. It has been shown to increase the stability of internal fixation, maintain the height of the humeral head to prevent varus, and reduce the risk of screw penetration. Biomechanical studies have also shown that the medial column has an outstanding performance in increasing the stiffness, torsion resistance, and shear resistance of the locking plate. Although it has many benefits, there is no unified definition of its concept and specific region, and the existing classification does not include the medial column, therefore more researches are required to provide supporting information. The methods of medial column reconstruction mainly include locking plate combined with talus screw, locking plate combined with bone grafting, internal and external double plate combined support, locking plate combined with bone cement, and humeral cage. These methods have their own characteristics, however they will increase the cost of surgery and bring new complications. How to determine the best way of reconstruction is one of the focuses of future research. In this review, the concept of the proximal medial humerus column, the role of maintaining internal fixation, the role of biomechanics and the reconstruction methods are reviewed.

Clinical analysis of external micro-locking plate in the treatment of fifth metatarsal comminuted fractures / 中国骨伤

OBJECTIVE@#To explore the clinical efficacy of external micro-locking plate combined with closed reduction in the treatment of fifth metatarsal comminuted fracture with severe soft tissue injury.@*METHODS@#From January 2018 to December 2019, 13 patients received micro-locking plate combined with closed reduction treatment due to the fifth metatarsal comminuted fracture with severe soft tissue injury. There were 11 males and 2 females patients, ranging in age from 21 to 69 years. According to the fracture AO fracture classification, 9 cases belonged to type 87(S)-C2.2 and 4 cases belonged to type 87(S)-C2.1. The fifth metatarsal cuneiform articular surface was not involved, and all of them were comminuted fractures of the fifth metatarsal shaft. All soft tissues were damaged to varying degrees. Three patients got small defect of skin and soft tissue, and they were treated with debridement and suture after one-stage emergency surgery. The fracture healing and complications were observed, and the clinical efficacy was evaluated according to the midfoot function score of American Orthopaedic Foot & Ankle Society (AOFAS) at the latest follow-up.@*RESULTS@#All patients were followed up, and the duration ranged from 3 to 12 months. One patient had delayed union. One patient had local skin necrosis and was treated with second-stage skin grafting to repair the wound surface. No external screw breakage or infection was reported, the skin soft tissue healed satisfactorily and reached bony union, with the union time ranging from 8 to 19 weeks. The postoperative functional recovery was rated according to the midfoot score of AOFAS, the score ranged from 49 to 98, and 7 patients got an excellent result, 4 good, 1 fair and 1 poor.@*CONCLUSION@#The external micro-locking plate combined with closed reduction in the treatment of fifth metatarsal comminuted fracture with severe soft tissue injury has the advantages of simple operation, good stability and low infection rate, which is helpful to the repair of soft issue injury, and the fixation can be removed early in outpatient clinic. To sum up, this surgical procedure is suitable for patients with severe soft tissue injury and comminuted fracture to avoid periosteum stripping. The space occupying is smaller than the micro-external fixator, which is convenient for patients with early functional exercise.

Clinical observation on plastic splint treatment of middle clavicle fracture based on a new classification / 中国骨伤

OBJECTIVE@#According to 73 patients with middle clavicle fracture treated conservatively, a new classification of middle clavicle fracture was proposed, and the clinical effect of plastic splint in the treatment of middle clavicle fracture was observed.@*METHODS@#Total 73 patients with middle clavicle fracture treated with plastic splint from September 2018 to August 2020 were analyzed retrospectively. All the patients were divided into 4 types according to the degree of fracture displacement. There were 16 cases of typeⅠ, including 7 males and 9 females, ranging in age from 18 to 37 years old, with a mean of (28.6±7.8) years old;12 cases of mild disease, 3 cases of moderate disease and 1 case of severe disease. There were 16 cases of type Ⅱ, including 6 males and 10 females, ranging in age from 25 to 49 years old, with a mean of (37.3±9.4) years old;5 cases of mild disease, 8 cases of moderate disease and 3 cases of severe disease. There were 7 cases of type Ⅲ, including 4 males and 3 females, ranging in age from 33 to 57 years old;2 cases of mild disease, 3 cases of moderate disease and 2 cases of severe disease. There were 34 cases of type Ⅳ, including 16 males and 18 females, ranging in age from 48 to 82 years old, with a mean of(66.4±14.9) years old;7 cases of mild disease, 17 cases of moderate disease and 10 cases of severe disease. All patients received plastic splint external fixation for 4 weeks. Visual analgue scale (VAS) and Constant-Murley shoulder scores before treatment and 1, 3 and 9 months after treatment were observed and recorded to evaluate the change of pain degree and shoulder function recovery before and after treatment. The patients' satisfaction with the appearance after treatment was recorded at the latest follow-up. The X-ray findings at the latest follow-up were used to judge whether the patient had fracture nonunion. And according to the fracture healing time and imaging findings, the excellent and good rate of clinical curative effect in patients with different types was obtained.@*RESULTS@#All patients were followed up, and the duration ranged from 9 to 11 months, with a mean of (9.8±0.7) months. The VAS scores of typeⅠ, typeⅡand type Ⅳ before treatment were 2.88±0.83, 3.67±0.80 and 6.92±1.71 respectively, which were decreased to 0.54±0.19, 0.77±0.25 and 1.18±0.17 respectively after 9 months of treatment. The Constant-Murley shoulder scores of typeⅠ, typeⅡand type Ⅳ were 65.81±2.09, 63.50±2.22 and 47.93±2.91 respectively before treatment, and increased to 88.56±2.11, 85.12±2.23 and 71.25±2.16 respectively after 9 months of treatment. Five patients were not satisfied with the appearance after treatment;6 patients had no obvious continuous callus passing through after 9 months of treatment, which was fracture nonunion.@*CONCLUSION@#The classification of middle clavicle fracture is more appropriate to the clinic, which has a certain clinical guiding significance for the selection of treatment methods and prognosis of middle clavicle fracture. Plastic splint is effective in the treatment of middle clavicle fracture without obvious displacement and overlapping displacement, and the incidence of complications is low. It can be popularized in clinic.

Clinical results of modified medial approach in the treatment of Pilon fracture with medial column compression / 中国骨伤

OBJECTIVE@#To explore the clinical results of modified medial incision in the treatment o f Pilon fracture with medial column compression and evaluate its safety.@*METHODS@#Thirty-one patients of Pilon fracture with medial column compressiom accepted surgical treatments in the Department of Foot and Ankle at Honghui Hospital of Xi'an Jiaotong University from January 2015 to January 2019. According to the imaging data at admission, 31 cases were diagnosed as closed Pilon fractures, and both preoperative X-ray and 3D CT scan were shown as medial column compressive fractures. All patients underwent modified medial incision with complete data, including 23 males and 8 females;ranging in age from 22 to 65 years old, with an average of (39.5±16.2) years old. All patients underwent modified medial approach combined with other approaches to expose the broken end of fracture. The time from trauma to operation ranging from 7 to 20 days, with a mean of(9.5±5.5) days. The incision and fracture healing were followed up regularly after operation.@*RESULTS@#All patients were followed up with an average of(15.7±5.5) months(ranged, 13 to 25 months). Preoperative and postoperative routine X-ray and 3D CT examination showed anatomical reduction in 8 cases, and the anatomical reduction rate was 25.81%. Up to the latest follow-up, all 31 fractures had achieved bone healing, and the healing time ranged from 11 to 22 weeks, with a mean of (14.3±4.7) weeks. At the latest follow-up, the American Orthopaedic Foot and Ankle Society (AOFAS) ankle and hindfoot scores ranged from 75 to 89, with a mean of 80.5±4.9, 24 patients got a good result, 7 fair.@*CONCLUSION@#The improved medial approach for Pilon fracture can directly expose the posterior medial, medial and anterior medial of the distal tibia. After reduction under direct vision, the medial compressed and collapsed articular surface are fixed. The clinical curative effect is satisfactory and the wound complications are less. It is recommended for Pilon fracture where compression of the medial articular surface is predominant.

Locking plate fixation with fibular strut allograft versus locking plate fixation alone for the treatment of proximal humeral fractures in adults:a Meta-analysis / 中国骨伤

OBJECTIVE@#To compare the clinical efficacy of locking plate fixation with a fibular strut allograft (FA group) and locking plate fixation alone (LP group) in the treatment of proximal humeral fractures in adults by Meta-analysis.@*METHODS@#Databases including PubMed, The Cochrane Library, Embase, Chinese BioMedical Literature Database(CBM), China National Knowledge Infrastructure(CNKI), WanFang Data, and China Science and Technology Journal Database (cpvip Database) were searched by computer from establishing to March 2020 to collect studies about locking plate fixation with fibular strut allograft versus locking plate fixation alone for proximal humeral fractures in adults. Two reviewers independently screened literature, extracted data, and assessed the risk of bias of included studies. The postoperative humeral head height changes, neck-shaft angle changes, Constant-Murley score, American Shoulder and Elbow Surgeons(ASES)score, visual analogue scale(VAS), varus malunion rate, and screw penetration rate were compared by RevMan 5.3 software for Meta-analysis.@*RESULTS@#Ten cohort studies were enrolled in a total of 749 patients, 300 patients in the FA group and 449 patients in the LP group. The results of Meta-analysis showed that locking plate with fibular strut allograft was superior to locking plate fixation alone in the changes in humeral head height [MD=-2.69, 95%CI(-3.24, -2.13), P<0.000 01], the changes in neck-shaft angle [MD=-5.65, 95%CI(-7.18, -4.12), P<0.000 01], Constant-Murley score [MD=9.00, 95%CI(4.26, 13.73), P=0.000 2], the ASES score [MD=5.56, 95%CI(4.29, 6.84), P=0.000 01], VAS score [MD=-0.23, 95%CI(-0.37, -0.09), P=0.001], the varus malunion rate [RR=0.22, 95%CI(0.09, 0.53), P=0.000 7] and the screw penetration rate [RR=0.26, 95%CI(0.13, 0.55), P=0.000 3], respectively.While there was no significant difference in the rate of osteonecrosis of the humeral head [RR=1.18, 95%CI(0.57, 2.45), P=0.65].@*CONCLUSION@#For proximal humeral fractures in adults, current evidence shows that locking plate fixation with fibular strut allograft is superior to single locking plate fixation in improving postoperative radiological outcomes and shoulder function, relieving postoperative pain, reducing varus malunion rate and screw penetration rate. However, the efficacy in decreasing the osteonecrosis rate is not clear. Due to limited quality and quantity of the included studies, more high-quality studies are required to verify the above conclusion.

Application of spinal surgical robots in minimally invasive surgery for thoracolumbar fracture / 中国骨伤

OBJECTIVE@#To evaluate the safety and accuracy of Renaissance robot navigation system in minimally invasive surgery for thoracolumbar fracture.@*METHODS@#The clinical data of patients with thoracolumbar fracture who underwent posterior minimally invasive pedicle screw internal fixation from July 2016 to July 2019 was retrospectively analyzed. And the patients were divided into robot group and artificial group. Robot navigation assisted screw placement was used in robot group, and traditional unarmed screw placement was used in artificial group. There were 20 patients in robot group, including 13 males and 7 females, aged from 23 to 69 years old with an average of(45.05±11.81)years old, one case was T11 fracture, 2 cases were T12, 10 cases were L1, 6 cases were L2 and 1 case was L3. There were 20 patients in artificial group, including 11 males and 9 females, aged from 26 to 65 years old with an average of(43.40±11.22)years old, 2 cases were T11 fractures, 7 cases were T12, 10 cases were L1, and 1 case was L3. The numbers of fluoroscopy, operation time and intraoperative blood loss were observed. The screw position was evaluated by Neo method.@*RESULTS@#A total of 126 screws were implanted in robot group and 124 screws were implanted in artificial group. The operation time, fluoroscopy times, intraoperative blood loss were(115.75±14.26) min, (7.95±0.89) times and (132.50±29.36) ml in robot group and (129.50±10.50) min, (14.40±2.56) times and(182.50±23.14) ml in artificial group, respectively, there was significant difference between the groups(P<0.05). According to Neo classification method, there were 122 screws at grade 0, 4 screws at grade 1 in robot group, and there were 108 screws at grade 0, 9 screws at grade 1 and 7 screws at grade 2 in artificial group. The accuracy of the robot group was better than that of artificial group(P<0.05).@*CONCLUSION@#Compared with free hand screw placement, Renaissance robot navigation system can effectively improve the accuracy of pedicle screw placement, reduce the number of fluoroscopy times and intraoperative blood loss, thereby improving the safety of operation.