A comparison of joint line height after revision total knee replacement using a rotating hinge versus a condylar revision knee system.

Purpose: This retrospective study aimed to assess the effects of two differing revision total knee implants designs (condylar and rotating hinge) on joint line height.

Method: The use of distal augmentation and pre and post revision radiographic joint line heights were compared in 19 condylar type knee replacements (Zimmer NexGen Legacy Constrained Condylar Knee - LCCK) and 40 LINK-Endo-rotating hinge knee replacements. Joint line and patellar heights were determined for each implant using four validated methods.

Patellofemoral kinematics in mobile-bearing and fixed-bearing posterior stabilised total knee replacements: a cadaveric study.

Purpose: The aim was to compare the patellar kinematics in the normal knee, fixed-bearing (FB) and mobile-bearing total knee replacement (MB-TKR). The hypothesis that a mobile-bearing TKR has a more natural patellar movement was tested.

Methods: Computer navigation was used to track the patella in nine whole lower extremities in the natural knee and in the same knee with a posterior stabilised FB-TKR and a posterior stabilised MB-TKR from 0° to 90° flexion.

Digital templating in hip replacement with and without radiological markers.

Digital templating in hip replacement is commonly performed with radiological markers to determine the magnification. The latter can also be determined by measuring the distance from the x-ray focal spot to the object and the distance from the x-ray focal spot to the radiological cassette or image receptor. We used post-operative radiographs of total hip replacements and hemiarthroplasties from 22 patients to calculate the magnification using both methods.

Pressure sores and hip fractures.

Development of pressure sores during hospital admission causes morbidity and distress to the patient, increases strain on nursing resources, delaying discharge and possibly increasing mortality. A hip fracture in elderly patients is a known high-risk factor for development of pressure sores. We aimed to determine the current incidence of pressure sores and identify those factors which were associated with an increased risk of pressure sores.

Intramedullary osteosynthesis of complex proximal femoral fractures with the Targon PF nail.

We evaluated the performance of the Targon PF nailing system in the treatment of complex proximal femoral fractures with a retrospective analysis of prospectively collected data for 94 patients with a complex proximal femoral fracture (subtrochanteric fracture or fracture with reversed fracture line pattern) treated with a Targon PF nail. There were no intra-operative femoral fractures. Late complications requiring reoperation were one femoral fracture and one fracture around the nail secondary to tumour.