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W N Capello

Publications and source records attributed to W N Capello.

45 records · Page 3Linked to original sources
PubMed1984

The Indiana conservative (surface-replacement) hip arthroplasty.

We reviewed the clinical results of the Indiana conservative hip arthroplasty in 116 hips with a two to seven-year follow-up. There were seventeen failures (14.6 per cent). The rate of non-traumatic loosening was 10 per cent and the failure rate for patients with inflammatory arthritis was 33 per cent. No infections, dislocations, subluxations, pulmonary emboli, or deaths were associated with the procedure. For forty-two hips with a successful result and a minimum follow-up of three years, the radiographs were analyzed. Factors that were found to have a high correlation with success of the arthroplasty were preservation of the acetabular subchondral bone, complete coverage of the acetabular component, and selection of the appropriate sizes of femoral and acetabular components. Radiolucency was not found to be a reliable diagnostic sign of, or prelude to, symptomatic loosening of the prosthetic implant.

Adult↗
PubMed1983

Intertrochanteric fractures after hip surface arthroplasty. A report of two cases.

Intertrochanteric fractures of the femur recently occurred following trauma in two young adult patients who had undergone Indiana Conservative Hip (ICH) surface arthroplasty. Although femoral neck fractures have occurred following ICH surface arthroplasty, these are the only two patients treated by the authors for intertrochanteric fractures following ICH surface arthroplasty.

Adult↗
PubMed1982

Conservative total hip arthroplasty.

Surface replacement arthroplasty of the hip is a relatively new procedure by orthopedic standards. The test of time is not yet far enough along to allow sound conclusions to be made, but the early results have been encouraging. Most of our failures occurred early in our experience, and our resulting have been steadily improving as our knowledge grows. Significant improvements have been made in surgical technique and prosthetic design. Refinements continue, and we are confident that surface replacement will withstand the test of time and prove to be a useful procedure, especially in younger patients suffering from severe cox arthrosis.

Adult↗
PubMed1982

The femoral head remnant in resurfacing arthroplasty.

The femoral head remnant was examined in six patients after Indiana resurfacing arthroplasty. Four hips failed by femoral neck fracture and two by acetabular loosening. Three of the four specimens that failed by fracture had total osteonecrosis, as assessed by histological criteria. The tissue did not evidence foreign body response to methyl-methacrylate, suggesting that osteonecrosis may have occurred at the time of resurfacing arthroplasty. Bony remodeling at the site of fracture indicates that fracture may have occurred through a weakened zone at the junction of viable and necrotic bone. In contrast, examination of the femoral specimens removed owing to acetabular loosening revealed viable bone, membrane formation and a foreign body reaction. The small number of specimens and lack of tetracycline labeling prohibit firm conclusions. These observations nevertheless suggest that resurfacing arthroplasty may, in some cases, cause osteonecrosis of the femoral head remnant, which may play a role in femoral neck fracture. Efforts should be made to obtain the femoral head remnant at autopsy and at revision surgery when indicated so that the state of the femoral head remnant after resurfacing arthroplasty and its role in the success or failure of the various procedures could be better understood.

Adult↗
PubMed1982

Analysis of revision surgery of resurfacing hip arthroplasty.

Results of revision of 24 resurfacing hip prostheses followed up for a minimum of one year are encouraging. The average Iowa Hip Rating after salvage was higher than the average highest rating prior to failure of the original resurfacing procedure. There were no intraoperative complications in revising any of the failed resurfacing procedures. Results of revision of the failed component of a resurfacing procedure are comparable with those of conversion to a conventional hip arthroplasty. Thorough, prompt evaluation of hip pain in recipients of a hip resurfacing procedure is necessary for preservation of remaining bone stock. In comparison to revision of conventional hip arthroplasty, revision of failed resurfacing hip arthroplasty is technically easier and has a better prognosis in providing the patient with a pain-free, functional hip.

Equipment Failure↗
PubMedDate not supplied

Conservative total hip arthroplasty: a procedure to conserve bone stock. Part I: analysis of sixty-six patients. Part II: analysis of failures.

Pain relief, function, and range of motion in surface replacement hip arthroplasty is comparable to the Charnley-type conventional arthroplasty. Patients with primary and secondary degenerative hip disease are the most suitable candidates for surface replacement. Previous operations, especially mold arthroplasty, increases incidence of failure. Osteopenia, obesity, or congenital deficiency of the acetabulum also increases the incidence of failure. Intraoperative preservation of abductor continuity and rigorous postoperative abductor strengthening are necessary to insure the success of the procedure. A minimum of 18 months is necessary to adequately evaluate the procedure. Acetabular loosening is avoidable. Hemispherical reaming of the femoral head did not contribute to femoral component loosening. Traumatic femoral neck fracture is a concern, but atraumatic femoral neck fracture can be avoided through improved operative technique, and by a program of rehabilitation of hip musculature. The procedure is indicated in the relatively young, well-motivated, non-obese patient with degenerative joint disease who has normal hip musculature.

Acetabulum↗