Resultados de la técnica septum bisagra en desviación de la punta nasal

Introducción: La desviación de la punta nasal suele producir alteración estética y funcional nasal. Generalmente, asocia alteraciones morfológicas de los cartílagos alares, además de dismorfia del cartílago septal. Objetivo: Presentar una técnica quirúrgica alternativa para el tratamiento de la laterorrinia en tercio inferior nasal y sus resultados. Material y Método: Se trataron 27 pacientes con una laterorrinia en punta nasal con la técnica del septum bisagra, incluyendo la colocación de uno o dos injertos de expansión. Describimos el protocolo de anamnesis y exploración que seguimos en estos pacientes y la descripción detallada de la técnica quirúrgica. Resultados: En 19 pacientes se utilizó un injerto de expansión unilateral para completar la técnica y en ocho de forma bilateral. Se obtuvo una puntuación media en la escala visual analógica (EVA) de ventilación de 8,3, con una mejoría de seis puntos, y en la EVA de aspecto estético de 8,1, mejorando en 4,6 puntos. Conclusión: la utilización de la técnica del septum bisagra es beneficiosa para el tratamiento de la desviación de la punta nasal, tanto a nivel funcional como estético. Presenta ciertas diferencias frente a otras técnicas descritas. La indicación se debe adecuar a cada paciente de manera individualizada.

Introduction: Deviation of nasal tip usually produces aesthetic disturbance and nasal ventilation decrease. It is usually associated with alar cartilages morphologic disturbances and dysmorphia of the septal cartilage. Aim: To present an alternative surgical technique for treating laterorrhinia in the nasal inferior third and its outcomes. Material and Method: 27 patients with nasal tip laterorrhinia were treated with the hinge septum technique, including the placement of one or two spreader grafts. We describe the anamnesis and exploration protocol that we carried out in these patients and a detailed description of the surgical procedure. Results: Unilateral spreader graft was used in 19 patients to complete the technique, and bilateral spreader graft was used in eight. The average score in visual analogue scale (VAS) related to nasal flow was 8.3, which means an improvement of six points, and in VAS related to aesthetic appearance the score was 8.1, improving 4.6 points. Conclusion: The use of the hinge septum technique is useful to treat the deviation of the nasal tip in a functional and aesthetic way. There are several differences compared to other described techniques. The indication has to be suitable for each patient individually.

Wear Simulation on Tibiofemoral Joint Surface of Rotating Hinge Knee Prosthesis / 医用生物力学

Objective To study the wear condition of rotating hinge knee prosthesis (RHKP) during horizontal walking gait, and provide technical references for wear prediction and clinical application of this kind of prosthesis. Methods A finite element wear model of RHKP was established based on the standard ISO 14243, and the simulation results including the wear distribution and mass wear rate of tibiofemoral joint surface were compared with the results from in vitro experiments on the same type of prosthesis. Results The mass wear rate of the polyethylene insert was 26.01 mg/MC (million cycle)from finite element analysis (FEA) and (30.06±1.21) mg/MC from in vitro experiments, and the mass wear rate of the upper surface of polyethene insert from FEA was about 3.3 times that of the lower surface. The wear area obtained by FEA was basically consistent with that obtained by in vitro wear measurement. The main wear area was symmetrically distributed in the middle and back of the upper surface. Conclusions The mass wear rate of RHKP, as a semi-restrictive prosthesis, is obviously higher than that of primary total knee joint prosthesis. More attention should be paid to wear test and evaluation of RHKP.

Kinematics and Comfortability Analysis of Orthosis for Patients Associated With Anterior Cruciate Ligament Injury: Hinge Versus Sleeve

@#Introduction: Every month, Sports National Institute (ISN) in Malaysia received around 3 to 4 cases associated with anterior cruciate ligament (ACL) injury involving athletes in hockey, kick volleyball and netball. Knee orthosis is one of treatment method and has been shown to support lower limb joint mechanics, which may protect the ACL injury for becoming worst. In this paper, an investigation was conducted to evaluate the performance of existing knee orthosis for treating ACL injury. Methods: Ten participants which have been grouped into two; six ACL patients (Group 1) and four healthy subjects (Group 2), where they took part in two bracing conditions; 1) with hinge (Brace 1) and 2) sleeve with bilateral hinges (Brace 2). A non-braced condition was included as a baseline measure. Three-dimensional kinematics data were used to calculate knee joint motions. Results: From the findings of ACL subjects, the knee flexion in non-braced condition (49.9°) has high value than others two braces, in which Brace 1 (40.9°) is less value than Brace 2 (44.6°). This shows the Brace 2 have higher degree of freedom than Brace 1. Other than that, the comfortability assessment found that Brace 2 is the most favourable options by participants in terms of less slippage and comfortless condition. Conclusion: In conclusion, the Brace 2 give best performance during dynamic balance activity in individuals who benefit from high degree of freedom and less slippage issue.

The effects of hinge structure on the biological activity of antimicrobial peptides and its application in molecular design: a review / 生物工程学报

The hinge structure, also known as hinge region or bend, is a special structure found in some antimicrobial peptides. Most studies on antimicrobial peptides focused on the standard secondary structure of α-helix and β-sheet, while the hinge structure and its functions were rarely studied. The hinge structure confers the antimicrobial peptides an improved structural flexibility, which may promote their disruptive effect on bacterial membrane or their binding efficiency to the intracellular targets, thus resulting in a higher antibacterial activity. Meanwhile, the hinge structure may reduce the structural rigidity, which may eliminate the cytotoxicity of antimicrobial peptides to eukaryotic cells. This article reviews the structural characteristics of the hinge structure, its effects on the biological activity of antimicrobial peptides and application in the molecular design, with the aim to provide a reference for the design and development of new antimicrobial peptides.

Early effectiveness analysis of lateral hinge fracture during medial opening-wedge high tibial osteotomy / 中国修复重建外科杂志

Objective: To compare the clinical and radiologic effectiveness in patients with versus without lateral hinge fracture during medial opening-wedge high tibial osteotomy (MOWHTO) to evaluate the effect of lateral hinge fracture on short-term effectiveness. Methods: The clinical data of 84 patients (97 knees) with medial compartment osteoarthritis who treated with MOWHTO between September 2015 and July 2018 was retrospectively analyzed. There were 10 males (10 knees) and 74 females (87 knees). The age ranged from 45 to 65 years with an average of 57.7 years. Lateral hinge fracture was recognized by the intraoperative fluoroscopy or immediate postoperative X-ray film. Fractures were classified into types Ⅰ, Ⅱ, and Ⅲ according to the Takeuchi classification. The healing of osteotomy was observed by radiographs during follow-up; the femur tibia angle (FTA), medialproximal tibial angle (MPTA), and hip-knee-ankle angle (HKA) were also calculated. The knee joint function was evaluated by Hospital for Special Surgery (HSS) score and knee society score (KSS). Results: The incision healed by first intention. All patients were followed up 15-48 months with an average of 24.8 months. No hinge fracture occurred in 78 knees (80.41%, group A), and lateral hinge fractures were observed in 19 knees (19.59%, group B) and were divided into the type Ⅰ (13 knees, 13.40%) and type Ⅲ (6 knees, 6.19%) groups. Type Ⅰ fractures were not additionally treated, type Ⅲ fractures were anatomic reduced fixed with additional lag screws. X-ray film and CT examination showed that all patients had bone healing at 3 months after operation without delayed healing or nonunion. During follow-up, there was no loosening or fracture of internal fixation plates and screws. HKA, FTA, and MPTA of patients in group A and group B (type Ⅰ and Ⅲ) were significantly improved at each time point after operation compared with preoperative values ( P0.05). After operation, the pain of knee joint was alleviated and the function of joint was improved. At last follow-up, KSS score and HSS score of groups A and B were significantly improved compared with those before operation ( P0.05). Conclusion: The lateral hinge fracture may occur during MOWHTO. As long as the treatment and rehabilitation were guided according to the fracture classification of the hinge, the effectiveness can be similar to those without the hinge fracture.

Design and clinical application of a self-designed acromion & clavicle anatomic plate with combinatorial hinge / 中华创伤骨科杂志

Objective To design and evaluate a new type of acromion & clavicle anatomic plate with combinatorial hinge more suitable for acromioclavicular joint dislocation and distal clavicular fracture.Methods The new type of acromion & clavicle anatomic plate with combinatorial hinge we had designed was used in 21 patients (21 shoulders) who were treated for acromioclavicular joint dislocation or distal clavicular fracture from October 2016 to April 2017 at Department Ⅰ of Orthopaedics,The 2nd People's Hospital of Lu'an.They were 15 men and 6 women,aged from 24 to 63 years(average,41.5 ±4.2 years).Of the 14 cases of acromioclavicular joint dislocation,7 were type Ⅲ,5 type Ⅳ and 2 type Ⅴ,according to the Rockwood classification;all the 7 distal clavicular fractures were Neer type Ⅱ.They were all treated by open reduction and internal fixation with our self-designed acromion & clavicle plate with combinatorial hinge.They were followed up at the outpatients department at 3 weeks,3,6,12 and 15 months postoperatively for evaluation of their shoulder functions by Constant-Murley score,changes in coracoclavicular clearance before and after operation and loss of coracoclavicular clearance after removal of internal fixation by X-ray.Results All the 21 patients were effectively followed up for 15 to 20 months (average,18 months).As for their Constant-Murley scores,preoperation (49.7±4.9) ＜3 weekspostoperation (57.6±5.9) ＜3 monthspostoperation (83.2±5.7) ＜6 months postoperation (90.4 ±4.0) ＜ 12 months postoperation (94.3 ±4.2) ＜ 15 months postoperation (98.1 ±4.2),with significant differences between different time points (P ＜ 0.05).The postoperative coracoclavicular clearances at different time points were all significantly decreased than the preoperative value (P ＜ 0.05).With the aid of our new type of acromion & clavicle anatomic plate,the shoulder functions of the patients were gradually improved,the postoperative acromioclavicular joint and reduction of the distal clavicular fracture were stable,and no re-dislocation occurred after removal of internal fixation.Conclusion Our new handy type of acromion & clavicle anatomic plate with combinatorial hinge can provide more effective internal fixation for acromioclavicular joint dislocation and clavicular distal fracture,facilitating functional recovery of the shoulder.

Study on lateral hinge fracture during open wedge high tibial osteotomy / 中国修复重建外科杂志

Objective: To summarize the related research results of open wedge high tibial osteotomy (OWHTO) complicated with lateral hinge fracture. Methods: To review the relevant literature of OWHTO at home and abroad in recent years and summarize and analyse the clinical experience. Results: The lateral hinge rupture may occur during the OWHTO, which may lead to the loss of correction angle after operation, delayed healing or non-union of osteotomy and so on. The lateral hinge plays an important role in the stability of the osteotomy. During the operation, the "safe zone" internal osteotomy can be used to protect the bone. Once the lateral hinge breaks, the TomoFix plate can be used to obtain the sufficient stability. For patients with lateral hinge rupture, functional exercise and full weight loading time should be guided by hinge breakage classification. Conclusion: The intact lateral hinge is beneficial to the healing and rehabilitation of OWHTO. The lateral hinge should be paid enough attention by clinicians.

Back out of Locking Pin with Hinge Fracture after High Tibial Osteotomy

Low-profile fixation devices for medial opening wedge high tibial osteotomy (OWHTO) were developed in order to avoid skin irritation and additional invasion. However, the low-profile system is associated with additional risks. We report three cases of locking pin back out with the low-profile locking plate system for medial OWHTO.

The Effect of Hinge Direction on Posterior Tibial Slope in Medial Open-wedge High Tibial Osteotomy: A Study Based on Three-dimensional Computed Tomography Modelling / 中国运动医学杂志

Objective To explore factors affecting posterior tibial slope changes after the medial openwedge high tibial osteotomy.Methods The open-wedge high tibial osteotomy was simulated and performed on the three-dimensional proximal tibia model reconstructed based on the computed tomography (CT) scanning,and the roles of hinge axis direction and correction of genu varum in postoperative posterior tibial slope changes were analyzed separately.Results Hinge axis pointing anterolaterally was significantly associated with the increase of postoperative posterior tibial slope with regard to the axis along the anterior-posterior direction.Meanwhile,the correction of the genu varum at a larger angle was also a crucial factor for the increase of postoperative posterior tibial slopes.Conclusion Postoperative posterior tibial slope changes after open-wedge high tibial osteotomy is closely associated with the hinge axis direction and correcting angle of the genu varum.

Hinge axis - location, clinical use and controversies

The hinge axis is an imaginary line around which the condyles can rotate without translation. Terminal hinge position is the most retruded hinge position and it is significant because it is a learnable, repeatable and recordable position that coincides with the position of centric relation. There are many schools of thought regarding hinge axis. The proponents of Gnathology say that there is one transverse hinge axis common to both condyles which can be accurately located. The proponents of transographics claim that each condyle has a different transverse hinge axis and that a transograph is the only instrument that can duplicate this. Still others claim that an exact duplication of jaw movement is not possible on any machine. The aim of this article is to throw light on location, clinical use and controversies of hinge axis.

Risk Factors for Delayed Hinge Fracture after Plate-Augmented Cervical Open-Door Laminoplasty

OBJECTIVE: Delayed hinge fracture (HF) that develops after cervical open door laminoplasty can be a source of postoperative complications such as axial pain. However, risk factors related to this complication remain unclear. We performed a retrospective clinical series to determine risk factors for delayed HF following plate-only open-door cervical laminoplasty. METHODS: Patients who underwent plate-only open-door laminoplasty and had available postoperative computed tomography (CT) scans (80 patients with 270 laminae) were enrolled. Hinge status, hinge gutter location, open location, hinge width, number of screws used, operation level, and open angle were observed in the CT to determine radiographic outcome. Demographic data were collected as well. Radiographic and clinical parameters were analyzed using univariate and multivariate logistic regression analysis to determine the risk factors for HF. RESULTS: Univariate logistic regression analysis results indicated poor initial hinge status, medially placed hinge gutter, double screw fixation on the elevated lamina, upper surgical level, and wide open angle as predictors for HF (p<0.05). Initial hinge status seemed to be the most powerful risk factor for HF (p=0.000) and thus was collinear with other variables. Therefore, multivariate logistic regression analysis was performed excluding initial hinge status, and the results indicated that medially placed hinge gutter, double screw fixation on the elevated lamina, and upper surgical level were risk factors for HF after adjustment for other confounding factors. CONCLUSION: To prevent HF and to draw a successful postoperative outcome after cervical laminoplasty, surgical and clinical precautions should be considered.

A comparative study of the bony fusion in different degrees of vertebral plate hinge fracture after single open-door cervical expansive laminoplasty with centerpiece mini-plate fixation / 中国医师进修杂志

Objective To compare the bony fusion in different degrees of vertebral plate hinge fracture after single open-door cervical expansive laminoplasty with centerpiece mini-plate fixation.Methods The clinical data of 79 patients received the unilateral simple open-door cervical expansive laminoplasty with centerpiece mini-plate fixation from January 2010 to December 2012 were retrospectively analyzed.The vertebral plate hinge fracture was divided into incomplete fracture and complete fracture according to thepostoperative CT scan.The complete fracture was divided into four types:type Ⅰ in which there was no displacement;type Ⅱ in which there was mild to moderate displacement;type Ⅲ in which there was complete displacement or separated; type Ⅳ in which there was hinge' s collapse into cervical canal.The hinge fracture healing was observed and the difference of different types of fracture healing rate was compared.Results Follow-up of 12-45 (21.2 ± 5.6) months.CT scan found 395 segments 1 week after the operation,vertebral plate hinge complete fracture accounted for 58.2％ (230/395).And type Ⅰ accounted for 66.1％ (152/230),type Ⅱ accounted for 25.7％(59/230),type Ⅲ accounted for 6.5％(15/230) and type Ⅳ accounted for 1.7％ (4/230).The fusion rate of incomplete fracture at 6 months after the operation was higher than that complete fracture [97.6％(161/165) vs.80.9％(186/230)],there was significant difference (P＜ 0.05).The fracture rate in different types of complete fracture at 3,6 months after the operation had significant difference (P ＜ 0.05).Type Ⅲ fracture had the lowest healing rate.Conclusion Type Ⅰ fracture is the major type for vertebral plate hinge complete fracture,complete fracture get a relatively bad bony fusion and type Ⅲ fracture has the lowest healing rate.

Application of Bilateral De-epithelialized Hinge Flap to Correct the Deep Depressed Scar

BACKGROUND: Depressed scars are usually corrected using subcutaneous fillers such a dermal fat grafting or an autologous fat grafting. But, fillers are absorbed over time and cannot be appropriately used for the correction of large or deep depressed scars. Therefore, we tried new methods to correct challenging cases of deep depressed scars. METHODS: From 2005 to 2013, deep depressed scar were corrected in 10 patients. The location of the scars were as follows: 6 neck, 4 lower extremities. Preoperative marking was done involving the scar on the skin in an oval shape including the long axis of relaxed skin tension line, and the epithelium of the scar was removed. Both ends of the dermal layer of the residual scar were dissected and then isolated from the subcutaneous layer of the adjacent skin. Then, we folded both ends of the flap like hinge flaps and thereby appropriately restored the depressed part of the dermal layer. And we directly closed skin for scar revision. RESULTS: All ten patients had a good result and satisfaction without complication, such as wound infection, dehiscence, at a mean follow-up of seven months. Correction of depression area made the depressed scar less noticeable. Moreover, the problems like donor morbidity, color and texture matching in case of using our techniques, are not issued. CONCLUSIONS: We folded residual scar tissue like a hinge flap in the correction of depressed scar. We obtained good outcomes and report our new methods and their outcomes with a review of literatures.

Comparison of Clinical Results according to the Complications after or during Open Door Laminoplasty Surgery for Cervical Myelopathy / 대한정형외과학회잡지

PURPOSE: The purpose of this study is to compare and analyze the clinical results according to the complications occurring after laminoplasty for cervical myelopathy patients. MATERIALS AND METHODS: Among patients diagnosed as cervical myelopathy, 152 cases in which patients underwent cervical laminoplasty from March 2006 to March 2011 from Chungnam National University Hospital and had follow-up for at least two years were selected for the study, and the mean follow-up period was 39.7 months. The cases were divided into two groups; cases that underwent plate fixation for hinge fracture during cervical laminoplasty or showed postoperative spontaneous interlamina fusion were included in group A and cases that did not show such complications were included in group B. Clinical results were measured using visual analogue scale (VAS) score and Neck Disability Index (NDI) preoperatively, postoperatively, and on the final follow-up. RESULTS: Among 152 cases, 31 cases were included in group A and 121 cases in group B. Group A consisted of 11 cases of fixation due to intraoperative hinge fracture and 20 cases of postoperative spontaneous interlamina fusion. Mean preoperative VAS score was 7.52 in group A and 7.26 in group B, and mean postoperative VAS score was 2.87 in group A and 3.03 in group B. Mean NDI improved from 74.32% preoperatively to 43.84% postoperatively in group A and 75.74% preoperatively to 45.36% postoperatively in group B. In both groups, on postoperative follow-up, no significant difference of VAS score and NDI was found and both showed improvement compared to before surgery. CONCLUSION: The clinical results of cases that underwent plate fixation for hinge fracture that occurred during cervical laminoplasty and postoperative spontaneous interlamina fusion showed no significant difference compared to cases that did not show any complications.

Oclusión dental: ¿doctrina mecanicista o lógica morfofisiológica? / Dental occlusion: mechanistic doctrine or morphophysiological logical?

Las escuelas de oclusión han creado un constructo mecanicista que busca explicar, bajo un modelo reduccionista y determinista, una dinámica cráneo-cervical y estomatognática compleja. Estos modelos de oclusión le dedican más importancia a la morfología dental y sus geometrías interpretativas que a la morfofisiología estomatognática. La configuración musculo-esquelética cráneo-cervical tiene el poder ganado de influir concomitantemente en la ubicación espacial de la mandíbula e implícitamente en las relaciones interoclusales. La visión actual de la oclusión sigue basándose en observaciones empíricas de un siglo de antigüedad que carecen de soporte apropiado en el marco del nivel de evidencia. En la dimensión funcional los modelos de oclusión conservan los mismos vacíos que existían desde su estructuración en el siglo pasado, particularmente en sus representaciones espaciales estáticas, uniáxicas y anti-dinámicas que desestiman la individualidad de cada sujeto. Cada especialidad puede tener tantas razones como puntos de vista diferentes de "maloclusión" así como formas de tratarla.

Occlusion schools have created a mechanistic construct that seeks to explain, under a reductionist and deterministic model, a craneal-cervical and stomatognathic complex dynamic. These occlusion models dedicate more importance to dental morphology and its interpretative geometries than a stomatognathic morphophysiology. Craneocervical musculoskeletal configuration has the gained power to concomitantly influence the jaw location in the space and implicitly in the interocclusal relations. The current vision of the occlusion is based on empirical observations of almost a century that lack support in the level of evidence framework. In the functional dimension occlusion models maintain the same gaps that existed from its origins since the last century, particularly in its static, uniaxic and anti-dynamic spatial representations that dismiss the individuality of each subject. Each specialty can have as many reasons as different points of view about "malocclusion" as well as techniques to treat it.

Meta analysis of randomized controlled clinical trial in the effect of hinge location on dry eye syndrome after LASIK / 中华实验眼科杂志

Background Dry eye syndrome is a frequent postoperative complication of laser in situ keratomileusis (LASIK).Some studies reported that the hinge location of corneal flap has influence on dry eye syndrome following LASIK,but others showed inverse views.Objective This systematic review was to evaluate and compare the effects of a superior-and nasal/temporal-hinge location on dry eye syndrome after LASIK.Methods A systematic literature retrieval was conducted in the Medline,Embase,Cochrane Library and CNKI from 1990 to 2011 according to designed searching strategy and relevant words.Published randomized-controlled clinical trial (RCT) data of the effect of superior-and nasal/temporal-hinge location on dry eye syndrome were extracted by two researchers separately.The outcome parameters,such as tear film breakup time (BUT),Schirmer Ⅰ test and corneal sensation were analyzed 1 week,3 months and 6-12 months postoperatively.The statistical analysis was performed using a RevMan 5.0 software and the quality of included literatures were graded according to the Jadad scale.Fixedeffect model was used for the inhomogeneity multiple studies (P≥0.1,homogeneity test I2 ＜50％),and random-effect model was used for the homogeneity studies.Results Ten pieces RCT papers were searched and 3 of them were rejected because of the lack of outcome data.In 7 included studies,652 eyes of 331 patients were involved in the Meta analysis,with the Jadad scores ≥ 3.BUT assessment was performed in 5 trials (530 eyes),Schirmer Ⅰ test evaluation was in 7 trials (652 eyes) and corneal sensation observation was in 4 trials (320 eyes),without significant homogeneity among the relevant literature(I2＜50％).Meta analysis revealed that BUT in the eyes with superior-hinge group was obvious shorter than that in the eyes nasal/temporal-hinge group at 1 week (WMD =-0.42,95％ CI:-0.79 to-0.06,P=0.020),but there was no signifieant difference in 3 months and 6-12 months duration postoperatively.Better corneal sensation was found at postoperative 3 months (WMD=-0.62,95％CI:-l.09 to-0.19,P=0.005) in the nasal/temporal-hinge group,but there was no difference in 1 week and 6-12 months duration postoperatively.No significant difference was seen between the two groups in Schirmer Ⅰ test during the follow-up period (P＞0.05).Conclusions LASIK with nasal/temporal-hinge corneal flap can improve the corneal sensation and relief the dry eye syndrome after LASIK to some extent.More high-quality evidence-based studies are still needed for the further clinical evaluation.

Larval development of Brachidontes solisianus (Bivalvia, Mytilidae): with notes on differences between its hinge system and that of the mollusk Perna perna

This work, which is part of a study program on meroplankton larvae, aims to gain more in-depth knowledge about planktonic larvae. This study began with the mollusk Brachidontes solisianus (Bivalvia - Mytilidae), which is abundant on the rocky shores of the Cabo Frio region (state of Rio de Janeiro, Brazil). Brachidontes solisianus larvae were grown under controlled conditions for a period of 26 days and were fed with Isochrysis galbana and Tetraselmis chui. The temperature was kept at 26 °C and the saltiness at 28‰. Images of the larvae were taken daily with a light camera and measured with a micrometric lens until settlement occurred. The average size of the first D-shaped veliger stage was 90 µm in length and 70 µm in height, while the size in the last stage before settlement (pediveliger) was 273 µm in length and 257 µm in height. The comparative study of the hinge system involved the most abundant intertidal species of the study area: Brachidontes solisianus and Perna perna. The B. solisianus species were found to have more visible denticles at the extremities of the provinculum, whereas the denticles of the P. perna species occur along the entire provinculum.

Este trabalho faz parte de um programa de estudo sobre larvas meroplanctônicas que tem como objetivo o reconhecimento mais preciso das larvas no plâncton. Este estudo foi iniciado com a espécie Brachidontes solisianus (Bivalvia - Mytilidae) que é muito abundante nos costões rochosos da região de Cabo Frio. O desenvolvimento larvar foi realizado sob condições controladas durante 26 dias. A alimentação foi feita com Isochrysis galbana e Tetraselmis chui. A temperatura e a salinidade foram mantidas a 26° C e 28 ‰ , respectivamente. Diariamente, as larvas foram desenhadas em câmara clara e medidas com ocular micrométrica até a fixação. A primeira fase de véliger em forma de "D" ou Prodissoconcha I, mediu em média, 90 µm de comprimento por 70 µm de altura e a última, antes da fase de fixação (Pedivéliger), mediu 273 µm de comprimento e 257 µm de altura. No estudo comparativo das charneiras, duas espécies foram consideradas: Brachidontes solisianus e Perna perna. Observou-se que a espécie B. solisianus apresenta dentes mais evidentes nas extremidades do provinculum, enquanto na espécie P. perna aparecem ao longo de todo o provinculum.

Medium-term clinical report of rotating hinge knee prostheses / 中国矫形外科杂志

[Objective]To refine operative indications of rotating hinge prostheses and report the medium term results of these implants,and to analyze the reasons for postoperative complications.[Method]From 1999 to 2007,42 Endo-Model(Link) rotating hinge prostheses were used in 34 patients.The cases were all gonarthrosis with severe genu varus,genu valgus or flexion contracture.Bone defect or instability was found in these cases before operation.The mean follow-up was 6.4 years(2.3-10.4 years).[Result]One case of deep infection,and one periprosthetic fracture were noted.And 3 cases of patella subluxation or tilt were detected by postoperative X-ray.All patients had excellent pain relief and restoration of walking capability.The average HSS score improved from 40.5 points to 89 points after surgery.[Conclusion]Besides being used in revision surgery,rotating hinge prostheses are indicated in primary arthroplasties for patients with severe ligament laxity,substantial deformity or bone losses.With appropriate indication selection and accurate operative skill,satisfactory medium term result can be obtained.

Periprosthetic fracture after hinge knee prosthesis / 中国矫形外科杂志

Periprosthetic fracture,a complication of prosthetic replacement of joint,is intimately related to the type of prosthesis and the situation of patient,while the treatment is sophisticated.This review highlights the current mechanisms and various treatment methods for periprosthetic fractures after Hinge Knee Prosthesis,providing important implications for the selection of therapeutic strategy and author's understanding of this case.

Treatment of severe knee deformity using Endo-Model rotating-hinge prosthesis / 中国矫形外科杂志

[Objective]To study the clinical result of Endo-Model rotating-hinge prosthesis in the treatment of severe knee deformity. [Method]Twenty-two patients(10 males and 12 females;12 right knees,8 left knees,and 2 bilateral knees) were selected for total knee arthorplasty using Endo-Model rotating-hinge prosthesis.The average age was 56.2 years.All the patients were evaluated by HSS score system.[Result]All incisions healed at one-stage and all malformations were corrected.The functional result was good.Mile deep vein thrombosis was found in one case after operation.All the patients were followed up for 6-55 months.No infection or prosthetic loosening was developed.[Conclusion]Endo-Model rotating-hinge prosthesis is an effective and reliable prosthesis for severe knee deformity.