Semilunar Vestibular Incision Technique for Treatment of Multiple Gingival Recession in Maxillary Teeth - An Evaluative Study

Background: Recession is a mucogingival condition affecting teeth causing hypersensitivity. Although many techniques are there for recession coverage, semilunar vestibular incision technique (SVIT) is a novel procedure for management of multiple gingival recession in maxillary teeth. Aim: To evaluate the efficacy of root coverage in maxillary teeth with multiple gingival recession using SVIT. Methodology: Twenty systemically healthy patients were recruited with Miller’s class I and II gingival recessions in maxillary teeth. Parameters such as recession height (RH), recession weight (RW), avascular surface area (ASA), width of keratinized gingiva (WKG), width of attached gingiva (WAG), and clinical attachment level (CAL) were measured at baseline three and six months post?surgery. Results: The outcome measures were statistically significant at baseline, three and six months. A reduction of 86% was achieved in terms of RH and RW. Gain in WKG and WAG as achieved at six?month follow?up was 31.5% and 55%, respectively. An 87% decrease in ASA was obtained and reduction in CAL was 82.4%. Between three and six months there was a significant increase in WAG. Conclusion: SVIT results in improved measures of attached gingiva on six?month follow?up.

Cirugía plástica periodontal. Aplicación de la técnica de colgajo semilunar / Periodontal plastic surgery. Application of the semilunar flap technique / Cirurgia plástica periodontal. Aplicação da técnica de retalho semilunar

RESUMEN Introducción: cada día es más frecuente observar la preocupación de los pacientes por la presencia de trastornos mucogingivales, y dentro de estos, uno de los más comunes es la recesión periodontal. Esta puede acompañarse de sensibilidad radicular, mayor prevalencia de caries y abrasiones cervicales. Presentación de caso: el caso que presentamos se trató de un paciente de 25 años de edad del sexo masculino que acudió a nuestra consulta preocupado por su estética y sensibilidad dental a los cambios térmicos. El mismo presentaba una recesión periodontal de 3 mm a nivel del 13. Discusión: decidimos darle solución al problema con la técnica de colgajo semilunar, cumpliéndose el objetivo del trabajo al quedar resueltos los problemas de estéticas y sensibilidad del paciente una vez cubierta la raíz y aumentado el ancho la encía insertada. Conclusiones: al examen clínico los resultados mostraron un recubrimiento radicular, aumento del grosor de encía insertada, disminución de sensibilidad dental y estética aceptada por el paciente.

ABSTRACT Introduction: every day it is more frequent to observe the concern of patients for the presence of mucogingival disorders, and within these, one of the most common is periodontal recession. This can be accompanied by root sensitivity, increased prevalence of caries and cervical abrasions. Case presentation: the case we presented was a 25-year-old male patient who came to our office concerned about his aesthetics and dental sensitivity to thermal changes. It presented a periodontal recession of 3 mm at the level of 13. Discussion: we decided to solve the problem with the semilunar flap technique, fulfilling the objective of the work by solving the problems of aesthetics and sensitivity of the patient once the root is covered and the width of the inserted gum is increased. Conclusions: on clinical examination the results showed a root coating, increase in the thickness of the inserted gum, decrease in dental sensitivity and aesthetics accepted by the patient.

RESUMO Introdução: a cada dia é mais frequente observar a preocupação dos pacientes com a presença de distúrbios mucogingival, e dentro destes, um dos mais comuns é a recessão periodontal. Isso pode ser acompanhado de sensibilidade radicular, aumento da prevalência de cárter e abrasões cervicais. Apresentação do caso: o caso que apresentamos foi um paciente do sexo masculino de 25 anos que veio ao nosso consultório preocupado com sua estética e sensibilidade dentária às mudanças térmicas. Apresentou uma recessão periodontal de 3 mm ao nível de 13. Discussão: decidimos resolver o problema com a técnica de retalho semilunar, cumprindo o objetivo do trabalho resolvendo os problemas da estética e sensibilidade do paciente uma vez que a raiz é coberta e a largura da gengiva inserida é aumentada. Conclusões: no exame clínico os resultados mostraram revestimento radicular, aumento da espessura da gengiva inserida, diminuição da sensibilidade dentária e estética aceita pelo paciente.

Semilunar sign of cornea: A multimodal analysis of the posterior corneal opacity in non-infectious anterior scleritis

Purpose: To analyze the morphological outcomes of the posterior corneal opacity or 搒emilunar sign� in noninfectious anterior scleritis using multimodal imaging. Methods: This was a prospective observational case series. Patients with anterior scleritis from January 2018 to January 2019 were included. Clinical and demographic data were collected. Posterior cornea was visualized using the digital slit lamp photography (Elite, mega digital vision), spectral domain optical coherence tomography (MS39), and specular count analyzer (EM?3000). 揝emilunar sign� was defined by the (1) presence of posterior corneal opacity, (2) concave semilunar pattern, (3) absence of blood vessels, and (4) normal anterior cornea. Incidence, clinical characteristics and significance, correlation with Mantoux sensitivity, and role of multimodal valuation were assessed. Results: Overall 76 eyes of 72 patients were recruited with anterior scleritis. Fifteen eyes of 11 patients (15.3%) presented with semilunar sign. The scleritis was both nonnecrotizing (n = 8) and necrotizing (n = 7). The semilunar configuration appeared as isolated (n = 9) and continuous lesion (n = 6). The extent was directly related to the scleral disease extent (P = 0.002). The mean thickness measured 212.5 � 129.3 ?m. The mean central endothelial cell density (ECD) was 2540.8 � 351.7 cells/mm2, which was significantly higher than the involved peripheral cornea (P = 0.05). The mean surface area of the semilunar sign was 7.7 � 5.2 mm2. There was no significant correlation between the opacity thickness and the best?corrected visual acuity (P = 0.895, r = ?0.39), ECD (P = 0.52, r = ?0.188), and Mantoux (P = 0.696, r =? 0.142). Conclusion: Corneal semilunar sign of scleritis affected the peripheral cornea and caused no functional abnormality in early presentation. Multimodal analysis can aid in clinical assessment and severity.

Hernia semilunar estrangulada. Presentación de caso / Strangulated semilunar hernia. Case report

Una paciente de sexo femenino, obesa, presentó un cuadro de oclusión intestinal secundaria a una hernia de Spiegel estrangulada. Relatamos el proceso diagnóstico, su tratamiento y evolución. Realizamos una revisión bibliográfica de esta poco frecuente presentación, haciendo algunas consideraciones sobre su frecuencia, forma de estudio y posibilidades terapéuticas.

An obese female patient presented with intestinal obstruction secondary to a strangulated Spiegel hernia. We report the diagnostic process, its treatment and evolution. A bibliographical revision is done with considerations on the frequency, diagnostic workup and alternative therapies

Luxación inveterada del semilunar / Inveterate Lunate Dislocation

RESUMEN Las fracturas-luxaciones carpianas son lesiones poco frecuentes que ocurren tras traumatismos de alta energía y que, inicialmente, muchas veces pasan desapercibidas. Se presenta un paciente de 32 años de edad, masculino, que había sido atendido seis semanas antes en la consulta de trauma tras caer de una altura aproximada de 6 metros. Se diagnosticó luxación aislada del semilunar y se le realizó carpectomía parcial. La evolución fue satisfactoria, el paciente se incorporó a su vida social activa a las 16 semanas del acto operatorio. Tras un año de evolución presentó dolor leve y ocasional(AU)

ABSTRACT Carpal fracture-dislocations are rare injuries that occur after high-energy trauma and that, initially, often go unnoticed. A case of a 32-year-old male patient is reported, he had been treated six weeks earlier in the trauma clinic after falling from a six meter height approximately. An isolated lunate dislocation was diagnosed and partial carpectomy was performed. The evolution was satisfactory, the patient joined his active social life 16 weeks after the operation. After a year of evolution, he showed mild and occasional pain(AU)

Luxación palmar divergente del escafoides y semilunar: reporte de caso / Palmar divergent dislocation of the scaphoid and lunate: case report

Reportamos el caso de un hombre de 61 años de edad quien presentó una luxación palmar divergente del escafoides y semilunar de la muñeca derecha secundario a trauma por caída de una escalera en su casa, quien fue atendido a las 24 horas del accidente, se le realizó una resección de los dos huesos (desvascularizados completamente), y se redujo el hueso grande en la fosa semilunar del radio más reparación de la cápsula articular y los ligamentos palmares radiocarpales. Al control del primer año el resultado ha sido satisfactorio, con un buen desempeño de su actividad laboral, y con una congruencia de la articulacion radio hueso grande y estabilidad completa de la muñeca. Nivel de Evidencia: IV

We report the case of a 61-year-old man who presented a Palmar divergent dislocation of the scaphoid and lunate of the right wrist secondary to trauma due to the fall of a ladder in his house, who was seen 24hours after the accident, he underwent a resection of the two bones (completely devascularized), and the Capitate bone was reduced in the lunate fossa of the radius by adding a repair of the joint capsule and the radiocarpal palmar ligaments. After the first year of follow up the result has been broadly satisfactory, with good performance of his working activity, and with a congruence of the Radial-Capitate joint with complete stability of the wrist. Evidence Level: IV

Dorsal capsulodesis associated with arthoscopy-assisted scapholunate ligament reconstruction using a palmaris longus tendon graft / Capsulodese dorsal associada à reconstrução assistida por artroscopia do ligamento escafossemilunar com enxerto do tendão do músculo palmar longo

ABSTRACT OBJECTIVES: To measure the quality of life, the time to work return, and clinical, functional, and radiographic parameters of patients treated with dorsal capsulodesis associated with scapholunate (SL) reconstruction, assisted by arthroscopy. METHODS: From January 2015 to September 2016, 14 adult patients with SL dissociation underwent surgical treatment with the SL reconstruction procedure assisted by arthroscopy, using the new technique proposed in this study. All patients were assessed by the occupational therapy department at regular intervals after surgery and performed the same sequence of rehabilitation. The parameters analyzed were: range of motion (ROM), Disability of the Arm, Shoulder, and Hand (DASH), visual analog scale (VAS), and radiographic analysis to visualize the pre- and postoperative SL gap and the pre- and postoperative dorsal intercalated segment instability (DISI) deformity the. The complications and the time to return to work activities were described. RESULTS: The follow-up time was 12 months (3-17). The ROM averaged 321° (96.9% of the normal side). VAS was 1.79/10 (1-6). DASH was 6.50/100 (1-30). The time to work return work was 4.42 months (2-17). As for complications, one patient developed SLAC, and underwent four-corner fusion one year after ligament reconstruction. Currently, he has experienced pain relief, with a functional range of motion of the wrist, and has not yet returned to professional activities. The preoperative SL gap was 4.29 mm (2-7); in the postoperative period, it was 1.79 mm (1-4). The DISI deformity was present in ten patients with SL angle > 70° (preoperative) and it was corrected after surgery, in all patients. SLAC stage I was identified in a patient. Arthroscopy was performed in all cases. The SL instability was classified as Geissler grade III in four cases and as grade IV in ten cases. CONCLUSION: The new approach (dorsal capsulodesis associated with SL reconstruction, assisted by arthroscopy) presented in this study is safe and effective in the treatment of SL dissociation, since it offers satisfactory clinical, radiographic and functional results, showing low rates of complications. For patients, it allows the return to their social and professional activities, and increases their life quality.

RESUMO OBJETIVOS: Mensurar a qualidade de vida, o tempo de retorno ao trabalho, os resultados clínicos, funcionais e radiográficos dos pacientes submetidos à capsulodese dorsal associada à reconstrução ligamentar escafossemilunar assistida por artroscopia. MÉTODOS: De janeiro de 2015 a setembro de 2016, 14 pacientes, esqueleticamente maduros, adultos, com dissociação escafolunar (SL), foram submetidos ao tratamento cirúrgico com o procedimento de reconstrução do ligamento escafossemilunar assistido por artroscopia com a nova técnica proposta neste estudo. Todos os pacientes foram avaliados pelo setor de terapia ocupacional em intervalos regulares de pós-operatório e fizeram a mesma sequência de reabilitação. Os parâmetros analisados foram: arco de movimento (ADM), Disability Arm, Shoulder and Hand (Dash), escala visual analógica (EVA) e análise radiográfica pré e pós-operatória para visualizar o espaço escafolunar (sinal de Terry-Thomas) e deformidade em Dorsal Intercalated Segment Instability (DISI) pré e pós-operatória. Descrição das complicações e o tempo de retorno ao trabalho. RESULTADOS: O tempo de seguimento foi de 12 meses [3-17]. O ADM foi em média 321,07° (96,9% do lado normal). O valor da avaliação subjetiva da dor (VAS) foi 1,79/10 [1-6]. A mensuração da qualidade de vida pelo Dash foi de 6,50/100 [1-30]. O tempo de retorno ao trabalho foi de 4,42 meses [2-17]. Quanto às complicações, uma paciente evoluiu com SLAC e foi submetida à artrodese dos quatro cantos um ano após a reconstrução ligamentar. Evoluiu com melhoria da dor e está com o ADM do punho funcional, mas ainda não retornou às atividades profissionais. O intervalo do SL (gap) pré-operatório foi de 4,29 mm [2-7] e o pós-operatório foi de 1,79 mm [1-4]. A deformidade DISI estava presente em dez pacientes, com um ângulo SL acima de 70° (pré-operatório), e foi corrigida após a cirurgia em todos os pacientes. SLAC estágio I foi identificado em um paciente. A artroscopia foi feita em todos os casos. A instabilidade SL foi classificada como um grau Geissler III em quatro casos e grau IV em dez casos. CONCLUSÃO: A nova abordagem (capsulodese dorsal associada à reconstrução ligamentar escafossemilunar assistida por artroscopia) apresentada neste estudo é segura e eficaz no tratamento da dissociação escafolunar, já que apresenta resultados radiográficos, clínicos e funcionais satisfatórios, demonstra baixas taxas de complicações, permite o retorno às atividades sociais e profissionais e aumenta a qualidade de vida desses pacientes.

Spontaneous rupture of the digital extensor tendons of the hand in unrecognized carpal lunatefracture / Ruptura espontánea de los tendones extensores de los dedos de la mano en una fractura oculta del semilunar

Abstract: Spontaneous rupture of the digital extensor tendons of the hand has been reported after Kienbock's disease, rheumatoid arthritis, Vaughan-Jackson' syndrome, distal radial fracture. Rupture may also occur as a consequence of unrecognized carpal lunate fracture. We present a case report of a man affected with spontaneous rupture of the digital extensor tendons secondary to unrecognized carpal lunate fracture with partial dorsal dislocation. The edges of the tendon were debrided and sutured using a locked modified Kessler suture. A dynamic splinting cast was applied in moderate extension of the wrist. The aim of this case report is to highlight that in absence of a clear etiology for rupture of the extensor tendons of the hand, carpal lunate fracture, though rare, is an important cause of spontaneous extensor tendons rupture.

Resumen: La ruptura espontánea de tendones extensores digitales de la mano ha sido reportado después de la enfermedad de Kienböck, artritis reumatoide, síndrome de Jackson Vaughan, fractura del radio distal. La lesión del tendón también puede ocurrir como consecuencia de la fractura no reconocida de carpal semilunar. En este artículo, se presenta un caso de un hombre que sufre de rotura espontánea del tendón extensor digital secundaria a fractura semilunar no reconocida de los huesos del carpo con luxación dorsal del fragmento parcial. Los bordes del tendón se han limpiado y se sutura usando una sutura de Kessler. Un refuerzo dinámico se aplicó en extensión moderada de la muñeca. El propósito de este caso clínico es poner de relieve que, en ausencia de una etiología clara de la ruptura de los tendones extensores de la mano, una fractura de los huesos del carpo semilunar puede ser una causa importante de la ruptura espontánea de los tendones extensores de la mano.

Morphology and morphometry of the distal articular surface of lunate bone in a Kenyan population / Morfología y morfometría de la superficie articular distal del hueso semilunar en una población de Kenia

The morphology and morphometry of the distal articular surface of the lunate exhibits inter-population variations. They are of clinical importance to hand surgeons due to their influence on the occurrence of proximal pole arthrosis which is a cause of ulnar-side wrist pain. The objective of the study was to determine the morphology and morphometry of the distal articular surface of the lunate bone in an adult Kenyan population. A descriptive cross-sectional study at the Department of Human Anatomy, University of Nairobi. Fifty-six human hands obtained for routine dissection were used. The morphology of the distal articular surface of the lunate was classified as either Type I or Type II depending on the absence or presence of a medial facet for articulation with the hamate respectively. The width of the wrists and of the medial facet in Type II lunates was measured with SOMETTM CN-25 1234 vernier calipers (accurate to 1mm). Photomacrographs of representative lunate were taken. Data were analyzed using SPSS version 17.0. The Pearson correlation test was used to check for any correlations. Type II lunate morphology was more common with a prevalence of 34 (61 %) while 19 (34 %) were Type I. The mean width of wrists with Type I lunate was 41.1±2.8 mm while those with Type II had a mean width of 46.1±4.3 mm. The mean width of the medial facet in lunate type II was 4.4±1.4 mm. Lunotriquetral fusion was demonstrated in 3 (5 %) wrists. Prevalence of Type II lunate was higher than Type I. Wrists with a Type II lunate were wider than those with Type I. There was no correlation between the width of the wrist and the width of the medial facet of the lunate.

La morfología y morfometría de la superficie articular distal del hueso semilunar muestra variaciones entre la población. Es de importancia clínica para los cirujanos de mano debido a su influencia en la incidencia de la artrosis del polo proximal, que causa dolor ulnar en la muñeca. El objetivo fue determinar la morfología y morfometría de la superficie articular del hueso semilunar en una población adulta de Kenia. Estudio descriptivo de corte transversal, realizado en el Departamento de Anatomía Humana de la Universidad de Nairobi. Se utilizaron 56 manos humanas que fueron sometidas a disección de rutina. La morfología de la superficie articular distal del hueso semilunar se clasificó en Tipo I o Tipo II en función de la ausencia o presencia de una faceta medial de la articulación. El ancho de las muñecas y de la faceta medial en el Tipo II se midió con el caliper SOMETTM CN-25 1234 (precisión de 1 mm). Se tomaron macrofotografías representativas del hueso semilunar. Los datos fueron analizados con el programa SPSS versión 17.0. Se utilizó la prueba de correlación de Pearson. La morfología del hueso semilunar Tipo II fue más frecuente con una prevalencia de 34 casos (61 %), mientras que 19 casos (34 %) eran de Tipo I. El ancho promedio de las muñecas del hueso semilunar Tipo I fue de 41,1±2,8 mm, mientras que las de Tipo II fue de 46,1±4,3 mm. El ancho promedio de la cara medial del hueso semilunar Tipo II fue de 4,4±1,4 mm. Se demostró fusión semilunar-piramidal en 3 casos (5 %). La prevalencia del hueso semilunar Tipo II fue mayor que la del hueso semilunar Tipo I. Las muñecas que presentaban hueso semilunar Tipo II fueron más anchas que las de Tipo I. No hubo correlación entre el ancho de la muñeca y el ancho de la faceta medial del hueso semilunar.

Comparison of semilunar coronally advanced flap alone and in combination with button technique in the treatment of Miller’s Class I and II gingival recessions: A pilot study.

Background: Gingival recession (GR) is one of the most common esthetic and functional concerns associated with periodontal disease. A variety of surgical procedures has been introduced to the field of cosmetic periodontology for the treatment of GR. Aim: To evaluate and compare the clinical outcome of semilunar coronally advanced flap (SCAF) with and without button technique in the treatment of Miller’s Class I and II GRs. Study Design: A total of 12 subjects with bilateral single Miller’s Class I and II recession were selected for the study. Split mouth design was used. Materials and Methods: Surgical sites were randomly divided into test and control groups. In control sites, SCAF alone was done whereas in test site, a combination of SCAF and button technique was performed. The clinical parameters including GR, periodontal pocket depth, clinical attachment level (CAL), and width of keratinized gingiva were recorded at baseline and 6 months postsurgery. Data so collected were put to statistical analysis. Statistical Analysis: Student’s t‑test was used to find significance of parameters between baseline and 6 months. For inter‑group comparisons paired t‑test was performed. Results: Statistically significant improvements were recorded in both groups from baseline to 6 months. Inter‑group comparison yielded statistically significant differences in GR and CAL in favor of test group. Conclusion: Combination of SCAF and button technique resulted in statistically significant improvements in clinical parameters as compared to SCAF alone. Future clinical studies with much larger sample size and longer follow‑up periods are warranted.

Investigación histórica de las hernias laterales de la pared abdominal / Historical analysis of the lateral abdominal wall hernias

Objective: To analyze the history of lateral abdominal wall hernias. Method: Review of the literature. Critical analysis of articles, books and monographs published, using key words: "ventral, lateral or semilunar abdominal wall hernia". Results: Undocumented contributions, such as Mancke, Molliére, Reynier, Ferrand or Thèvenot, among others are discovered. Casseri was the first surgeon to illustrate the semilunar line, before Spiegel. Mancke was the first surgeon to use the term lateral ventral hernia. Molliére was the first surgeon to use the term semilunar hernia (not Klinkosch). Thévenot was the first surgeon to use the term Spiegel hernia. Conclusion: The story of the lateral hernias has errors and omissions of important authors. 1) semilunar line was known and illustrated first by Casseri, so we should call Spiegel-Casseri semilunar line; 2) Klinkosch was not the first to use the name of semilunar hernia, but Molliere, who defined them as a different group of ventral; 3) Mancke was first named as the lateral hernias, and Ferrand side who made the first thesis under that title, and 4) the contributions of Reignier and Thévenot, not mentioned in any treatise on surgery are discovered.

Objetivo: Analizar la historia de la hernia lateral de la pared abdominal. Método: Revisión de la literatura. Análisis crítico de los artículos, tesis, libros y monografías publicadas, utilizando como palabras clave: "hernia ventral, lateral o semilunar". Resultados: Se descubren aportaciones no documentadas, como las de Mancke, Molliére, Reynier, Ferrand o Thévenot, entre otros. Casseri fue el primer cirujano en ilustrar la línea semilunar, antes que Spiegel. Mancke, el primero que utilizó el nombre de hernia lateral del abdomen. Molliére fue el primero que usó el término hernia semilunar (no Klinkosch), y Thévenot el primero que usó el término hernia de Spiegel. Conclusión: La historia de las hernias laterales presenta errores y omisiones de autores importantes: 1) la línea semilunar fue conocida e ilustrada primero por Casseri, por lo que deberíamos llamarla línea semilunar de Spiegel-Casseri; 2) Klinkosch no fue el primero en utilizar el nombre de hernia semilunar, sino Molliére, quien las definió como un grupo diferente de las hernias ventrales; 3) Mancke fue el primero que las nombró como hernias laterales y Ferrand quien realizó la primera tesis bajo ese título, y 4) se descubren las aportaciones de Reignier y Thévenot, no mencionadas en ningún tratado de cirugía.

Pathology and therapeutic results in patients with intraosseous ganglia of the carpal bone / Patología y resultados terapéuticos en los pacientes con ganglión intraóseo del hueso carpiano

This study evaluated the pathology and therapeutic results of seven patients with intraosseous ganglia of the carpal bone. The mean age at the time of surgery was 27.6 years. The lesions were localized in the proximal carpal row in six patients and in the distal carpal row in only one. Surgical treatment was performed in all patients with good bone union. None had pain during activity or at rest and no recurrence had occurred. The intraosseous ganglia in four patients was of the idiopathic type, and in the other three patients was of the penetrating type. Although intraosseous ganglia of the carpal bone is reported as a rare disease, there were 159 cases in the literature. The pathology was intra- or extraosseous development, showing variation, but most cases were localized in the proximal carpal row.

Este estudio evaluó la patología y resultados terapéuticos de siete pacientes con ganglión intraóseo del hueso carpiano. La edad promedio en el momento de la cirugía fue 27.6 años. Las lesiones se localizaban en la fila proximal del carpo en seis pacientes y en la fila distal carpiana solamente en uno. El tratamiento quirúrgico se realizó en todos los pacientes con buena unión ósea. Ninguno tuvo dolor durante la actividad o el reposo, y no había tenido lugar recurrencia alguna. El ganglión intraóseo en cuatro pacientes fue de tipo idiopático, y en los otros tres pacientes fue de tipo penetrante. Aunque el ganglión intraóseo del hueso carpiano se informa como una enfermedad rara, se reportaban 159 casos en la literatura. La patología consistía en un desarrollo intra- o extraóseo, con variación, pero la mayoría de los casos se localizaban en la fila proximal carpiana.

The image appearances of intraosseous ganglion of the wrist / 中华放射学杂志

Objective To observe the imaging features of intraosseous ganglion of the wrist. Methods The radiographs (6 cases), CT (4 cases), and MR (1 case) in 6 cases (7 lesions) of surgically confirmed intraosseous ganglion were retrospectively reviewed. Results Typical intraosseous ganglion was seen as sharp margined and cystic lesion with the size of approximately 0.5 cm in diameter. All but one lesion showed no communication with joint. No degenerative changes were seen in the joints nearby. CT was able to depict the lesions better than radiographs in 4 cases. Intraosseous ganglion was seen as slight low signal on T 1WI and slight high signal on T 2WI MR images. Conclusion Intraosseous ganglion was typically seen as sharp-margined and cystic lesion on radiographs, and it could be better demonstrated with CT and MR. With typical imaging appearance, a suggestion to the diagnosis of intraosseous ganglion could be made.

Observation of scaphoid-lunate interval of the wrist by a new modified posterior-anterior view / 中华骨科杂志

Objective Normal radiographic scaphoid lunate (SL) interval is thought to be 2 mm and abnormal SL interval is a prerequisite for diagnosing scapholunate instability. However, in the routine neutral rotation posterior anterior (PA) view of the wrist, the frequent overlapping between scaphoid and lunate precludes proper interpretation of the interval. Moreover, the normative data in Chinese population has not been reported. We developed a new but simple technique in radiological assessment to evaluate the normal SL interval in Chinese. Methods With the forearm in neutral rotation, a PA view of the wrist was taken using a mobile Xiscan. A radiolucent cushion was put underneath the hypothenar eminence so that the metacarpal arch of hand became parallel to the receiver table of the Xiscan. The normal supination posture of the wrist was thus corrected and the true SL interval was revealed. Two hundred normal wrists were examined; there were 46 female and 54 male healthy Chinese subjects, with age ranging from 18 to 80. The SL interval was determined with wrist in neutral, radially deviated and ulnarly deviated position using the cushioned neutral rotation PA view. The length of capitate, hamate and lunate were also measured to correlate with the SL interval. Results By using the standard PA view, the SL interval could not be determined in 60% of cases. Using the new assessment method, the optimal intervals were seen in all cases. The average SL interval was (2.07?0.65) mm. There was no significant gender difference. The measurement of ulnar variance was not affected by the new method. Conclusion The modified (Cushioned) PA view was the optimal radiological assessment method for true SL interval. There was wide variation of the normal value of the SL interval in Chinese population.

A STUDY OF THE VERTICAL STRESS ON SEMILUNAR CARTILAGE MODEL USING THREE-DIMENSIONAL PHOTOELASTIC METHOD / 解剖学报

The characteristic of stress and load transmission in the semilunar cartilage model was studied with three-dimensional photoelastic method based on the principle of biomechanics. In addition to the liner function, the menisci may also provide with significant load-bearing capacity, The bearing capacity of external semilunar cartilage is larger than that of the internal one. Besides, the capsule and other soft tissue of the knee joint also participate in the load transmission. This study suggests that application of three-dimensional photoelastic method for the semilunar cartilage research may be a useful mean and with widespread prospect.

MORPHOGENESIS OF VALSALVA'S SINUS OF SEMILUNAR VALVES IN CHICK EMBRYO / 解剖学报

The morphogenesis of Valsalva's sinus of semilunar valves in chick embryo was studied with SEM and LM. The sinus began to develop at stage 30 and was basically formed at stage 34 (based on H-H staging). The endothelial cells on arterial and ventricular surfaces of the valve were morphologically different. Mesenchymal cells beneath the endothelium were distributed loosely or densely on different parts of the valve in accordance with the morphological changes of the endothelial cells. The study suggests that the formation of the sinus is associated with not only the growth of endothelial cells on the arterial surface of the valve into underneath mesenchyme, but also with the mesenchyme which is loosing and presents some cavities.