The use of acetabular cup revision arthroplasty is on the rise as demands for total hip arthroplasty, improved life expectancies, and the need for individual activity increase. For an acetabular cup revision to be successful, the cup should gain stable fixation within the remaining supportive bone of the acetabulum. Since the patient's remaining supportive acetabular bone stock plays an importa...

OBJECTIVES/HYPOTHESIS To provide a description of the techniques and limitations of nasoseptal flap takedown and reuse during second-stage and revision endoscopic skull base surgery and review the institutional experience with the use of this reconstructive technique. STUDY DESIGN : Case series. METHODS A retrospective analysis of cerebrospinal fluid (CSF) leak outcomes was performed for a ...

Cervical disc replacement (CDR) has emerged as an alternative surgical option to cervical arthrodesis. With increasing numbers of patients and longer follow-ups, complications related to the device and/or aging spine are growing, leaving us with a new challenge in the management and surgical revision of CDR. The purpose of this study is to review the current literature regarding reoperations fo...

The number of revision total knee arthroplasty procedures performed annually is increasing and, subsequently, so is the number of patients presenting following a failed revision. Rerevising a total knee arthroplasty after one or more failed revision procedures presents many challenges, including diminished bone stock for prosthetic fixation. "Off the shelf" implants may not offer the best alter...

Total knee arthroplasty (TKA) is a cost effective and extremely successful operation. As longevity increases, the demand for primary TKA will continue to rise. The success and survivorship of TKAs are dependent on the demographics of the patient, surgical technique and implant-related factors. Currently the risk of failure of a TKA requiring revision surgery ten years post-operatively is 5%. Th...

Model checking is one of the most robust techniques in automated system verification. But, although this technique can handle complex verifications, model checking tools usually do not give any information on how to repair inconsistent system models. In this paper, we show that approaches developed for CTL model update cannot deal with all kinds of model changes. We introduce the concept of CTL...

Revision anterior cruciate ligament reconstruction can be performed in a 1- or 2-stage procedure. Restoration of bone stock using bone grafting is often required for good results. The authors performed 1-stage revision surgery with a more lateral and oblique femoral tunnel and an impacted bone graft to avoid the bone defect caused by the previous screw removal from a malpositioned tunnel. No ev...

during a period of nine years (1982-1991), pauwels' osteotomy was performed for 38 cases of femoral neck non-::::union::::. 32 led to consolidation with one osteotomy (84%) and 6 failed (3 needed revision (92%), one died and two were lost to follow-up). the length of follow-up was 2-11 years, the average time of non-::::union:::: 12 months (ranging from 4 months to 13 years) and the mean p...