Outcome comparison of primary trapeziectomy versus secondary trapeziectomy following failed total trapeziometacarpal joint replacement.

Purpose: To compare the clinical outcome between secondary trapezial excision after failed total trapeziometacarpal joint replacement and primary trapeziectomy.

Methods: Between October 2003 and July 2008, we performed 16 revision procedures in our institution because of failed trapeziometacarpal joint replacements. Of these patients, 15 were followed up.

The effect of defect localization on spontaneous repair of osteochondral defects in a Gottingen minipig model: a retrospective analysis of the medial patellar groove versus the medial femoral condyle.

Various animal models for experimental osteochondral defect healing have been used in orthopaedic research. Two main defect locations were chosen: the patellar groove or the central part of the medial femoral condyles (MFC). To date, it is not clear whether both locations display similar patterns in critical size osteochondral defect healing.

Comparison of cobalt chromium, ceramic and pyrocarbon hemiprosthesis in a rabbit model: Ceramic leads to more cartilage damage than cobalt chromium.

Cartilage wear after hemiarthroplasty remains a problem in orthopedic surgery. The main cause of cartilage wear, apart from incongruency of the joint partners, is generally considered to be the tribology of the material surfaces. This study evaluates in 27 rabbits the degree of cartilage wear of the tibia plateau after hemiarthroplasty with proximal interphalangeal prostheses made of three different materials [cobalt chromium (CoCr), pyrocarbon (PyCa), and ceramic (Cer)].

Trochanteric fractures in the elderly: the influence of primary hip arthroplasty on 1-year mortality.

Introduction: The aim of the study was to compare the mortality risk and complication rate after operative treatment of pertrochanteric fractures with primary arthroplasty, dynamic hip screw (DHS) or proximal femoral nail (PFN).

Patients And Methods: Clinical records including X-rays of all patients with trochanteric femoral fractures, except pathologic fractures and a minimum age of 60 years, which were treated between 1992 and 2005 were entered in this retrospective study. Of these 283 patients, 132 were treated by primary arthroplasty, 109 with a DHS and 42 with a PFN.

Reconstruction of Lower Extremity Fractures with Soft Tissue Defects.

Reconstruction of osseous and soft tissue defects after high-energy lower extremity trauma remains a challenge in trauma surgery. An initial planning of the reconstruction management is crucial in the therapeutic concept of these severe injuries. In Gustilo type II and IIIa fractures with minimal contamination a primary definite osseous stabilization by internal fixation along with primary soft tissue reconstruction is preferable.

Proximal row carpectomy: an adequate procedure in carpal collapse.

Proximal row carpectomy (PRC) is an established procedure in the treatment of advanced radiocarpal arthritis. The aim of this study was to evaluate the individual, functional and radiological results in relation to the initial diagnosis. Seventeen patients (15 men, two women), who had undergone PRC, were evaluated.

Amount of ulnar resection is a predictive factor for ulnar instability problems after the Sauvé-Kapandji procedure: a retrospective study of 44 patients followed for 1-13 years.

Background: The Sauvé-Kapandji procedure can result in instability of the proximal ulnar stump.

Patients And Methods: We reviewed 44 patients (mean follow-up time 6 (0.6-13) years) to investigate predictive factors for ulnar instability after Sauvé-Kapandji operation.

Osseointegration and mechanical stability of pyrocarbon and titanium hand implants in a load-bearing in vivo model for small joint arthroplasty.

Purpose: To test the mechanical stability and histologic osseointegration under load-bearing conditions of 2 different materials, pyrocarbon (Py) and titanium (Ti), in a rabbit model.

Methods: Proximal interphalangeal implants (9 Ti, 8 Py) were placed into rabbit knees and the animals were killed after 3 months. Subsidence was assessed by monthly x-rays.

Occurrence of carpal osteoarthritis after treatment of scaphoid nonunion with bone graft and herbert screw: a long-term follow-up study.

Purpose: To determine the occurrence, progression, and clinical results of osteoarthritis (OA) after bone grafting and Herbert screw fixation for scaphoid nonunion.

Methods: Fifty patients were reviewed (mean follow-up period, 12.0 +/- 1.

Vascularized os pisiform for reinforcement of the lunate in Kienböck's Disease: an average of 12 years of follow-up study.

Purpose: Little is known about the long-term results of vascularized bone transplantation for Kienböck's disease. This retrospective study investigated the long-term results of vascularized pisiform transfer.

Methods: We reviewed 23 patients to analyze results after vascularized pisiform transposition to a cored-out lunate for Lichtman stages II and III.

Lunate resection and vascularized Os pisiform transfer in Kienböck's Disease: an average of 10 years of follow-up study after Saffar's procedure.

Purpose: To investigate the long-term results of lunate replacement by vascularized bone transfer in advanced Kienböck's disease.

Methods: Twenty-one patients were reviewed (mean follow-up period +/- SD, 9.9 +/- 3.

Osteosarcoma of the hand and forearm: experience of the Cooperative Osteosarcoma Study Group.

Background: Osteosarcoma is extremely rare in the hand and forearm. Therefore, only limited data are available for planning treatment or predicting the outcome and prognosis of osteosarcoma in the peripheral upper extremity.

Methods: Epidemiological, clinical, and histopathologic data were analyzed in 39 patients with osteosarcoma of the forearm or hand who were enrolled in studies of the Cooperative German-Austrian-Swiss Osteosarcoma Study Group from 1977 to December 2000.

Ewing's sarcoma and primitive neuroectodermal tumor of hand and forearm. Experience of the Cooperative Ewing's Sarcoma Study Group.

Purpose: Because Ewing's sarcoma (EWS) is extremely rare in the hand and forearm, only limited data are available for planning treatment or predicting prognosis.

Methods: Data of 33 patients with EWS of the forearm or hand who were enrolled in studies of the German Association for Paediatric Oncology/Haematology and the European Intergroup Cooperative Ewing's Sarcoma Study Group were analyzed. Patients received neoadjuvant multi-agent chemotherapy according to the valid protocol.