The influence of obesity on early outcomes in primary hip arthroplasty.

Obesity is considered an independent risk factor for adverse outcome after arthroplasty surgery. Data on 191 consecutive total hip arthroplasties were prospectively collected. Body mass index (BMI) was calculated for each patient and grouped into nonobese (BMI <30 kg/m(2)), obese (BMI 30-34.

Accuracy of patellar resection in total knee replacement. A study using the medial pivot knee.

A series of 80 patellae were randomly allocated to osteotomy by sawing or milling while implanting the medial pivot knee. Three landmarks were used to control the plane of the cut in the coronal plane. The lateral edge of the patellar tendon distally, and both medial and lateral edges of the quadriceps tendon proximally.

Varus/valgus alignment of the femur in total knee arthroplasty. Can accuracy be improved by pre-operative CT scanning?

In a series of 80 consecutive knee replacements, pre-operative scout scans of the femur were taken and the angle between the slope of the worn femur and the mechanical axis was measured. At surgery the angle of the distal femoral cut was adjusted to make it perpendicular to the mechanical axis. Post-operative scans revealed that 97.