Building a Screen for Cancer Survivorship-Occupational Therapy Services (SOCS-OTS): a classical Delphi study.

Purpose: The purpose of this study was to develop and validate items for the Screen of Cancer. Survivorship - Occupational Therapy Services (SOCS-OTS), a patient-driven screening tool to be used by frontline workers and filled out by cancer survivors that can indicate a need for appropriate occupational therapy (OT) referral.

Methods: Five rounds of a classical Delphi study were conducted to determine item inclusion.

The C-stem in clinical practice: fifteen-year follow-up of a triple tapered polished cemented stem.

The triple tapered polished cemented stem, C-Stem, introduced in 1993 was based on the original Charnley concept of the "flat back" polished stem. We present our continuing experience with the C-Stem in 621 consecutive primary arthroplasties implanted into 575 patients between 1993 and 1997. Four hundred and eighteen arthroplasties had a clinical and radiological follow-up past 10 years with a mean follow-up of 13 years (10-15).

The effect of cup inclination and wear on the contact mechanics and cement fixation for ultra high molecular weight polyethylene total hip replacements.

The present study aimed to investigate individual and combined influences of the cup inclination and wear on the contact mechanics and fixation of a Charnley hip replacement using finite element method. The effects of cup inclination and penetration on the contact mechanics of articulating bearings as well as the stress within the cement and at the bone-cement interface were examined. The maximum contact pressure and the von Mises stress on the cup were reduced by ~30% and ~20% respectively when even a small penetration occurred.

Computational assessment of the effect of polyethylene wear rate, mantle thickness, and porosity on the mechanical failure of the acetabular cement mantle.

Clinical studies have revealed that aseptic loosening is the dominant cause of failure in total hip arthroplasty, particularly for the acetabular component. For a cemented polyethylene cup, failure is generally accompanied by the formation of fibrous tissue at the cement-bone interface. A variety of reasons for the formation of this tissue have been suggested, including osteolysis and mechanical overload at the cement-bone interface.

Effect of reduced diameter neck stem on incidence of radiographic cup loosening and revisions in Charnley low-frictional torque arthroplasty.

Previous studies of the Charnley low-frictional torque arthroplasty have established an exponential correlation between the depth of cup penetration and the incidence of ultrahigh molecular weight polyethylene cemented cup migration. Impingement of the neck of the stem on the rim of the cup was considered to be the cause. We compared the incidence of radiographic loosening and revision of the cup in 2 groups of patients: those with 12.

Charnley low-frictional torque arthroplasty in young rheumatoid and juvenile rheumatoid arthritis: 292 hips followed for an average of 15 years.

Introduction: In the early 1960s, Charnley was cautious with his patient selection for total hip replacement. As follow-up increased and confidence in the operation grew, younger patients were selected. We present our results of the Charnley LFA in young patients with rheumatoid and juvenile rheumatoid arthritis with a followup of up to 36 years.

Wear of ultra-high-molecular-weight polyethylene cup articulating with 22.225 mm zirconia diameter head in cemented total hip arthroplasty.

A number of studies have highlighted the increasing incidence of aseptic cup loosening with increasing depth of cup penetration by the metal head. We present our experience with a 22.225 mm diameter zirconia head on a 9-10 taper articulating with an ultra-high-molecular-weight polyethylene (UHMWPE) cup in cemented total hip arthroplasties.

Surface-active phospholipid in total hip arthroplasty.

This is the first report of surface-active phospholipid as the boundary lubricant in total hip arthroplasty. Aspirate and rinsings from the bearing surfaces of 25 revision operations and one primary surgery were analyzed from 3 weeks to 26 years postoperatively. All samples contained substantial amounts of surface-active phospholipids ranging from 14 to 4186 microg.