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At least 919 records · Page 51Linked to original sources
PubMed1998

Bone loss around 2 different types of hip prostheses.

Dual energy x-ray absorptiometry (DXA) allows the measurement of bone mineral density (BMD) around an uncemented hip prosthesis. The aims of this study were: 1) to determine the reproducibility of periprosthetic BMD measurements; 2) to delineate the time course of bone loss that occurs after insertion of a hip prosthesis; and 3) to compare the bone loss around two different types of hip prosthesis. We studied 20 patients: 11 had Bateman and 9 had porous-coated anatomic prostheses inserted. The mean bone loss in 20 patients between 6 and 52 weeks after surgery was 6%. The greatest loss during this period was 18% and occurred from the proximal medial cortex. We conclude that measurement of periprosthetic bone mass by DXA is a precise technique. Bone loss was rapid in the first 6 months following total hip replacement. There was no difference in the bone loss occurring around the two prostheses studied.

Absorptiometry, Photon↗
PubMed1991

A prosthesis augmentation device for the prevention of recurrent hip dislocation. A preliminary report.

At present, revision is the only standard option for cases of recurrent hip prosthesis dislocation. A device is described that contains the head of the femoral component, preventing dislocation, while only slightly restricting external rotation of the affected leg. The device can be inserted through a small incision, minimizing operation time. This device differs from others, e.g., the reversed acetabular cup, by being predrilled (with drill guide supplied), modular in design, and tailored to the dimensions of the cup site.

Aged↗
PubMed2000

[Anchoring principles in hip endoprostheses. I: Prosthesis stem].

Total hip replacement is one of the most successful procedures in surgery. In Germany there is a great variety of cemented and uncemented implants with different principles of fixation. We reviewed the different principles, with particular reference to long-term clinical outcome, and discuss the most popular systems available in Germany. Despite many new developments which have been made in the field of cementless hip replacement, cemented total hip arthroplasty will remain the "gold standard" until prospective long-term data (> 15 years) of cementless systems become available.

Arthroplasty, Replacement, Hip↗
PubMed2004

[Vascularized fibular transplant for avascular necrosis of the femoral head: 16 cases].

PURPOSE OF THE STUDY: We report our experience with vascularized fibular transplant using the technique described by Urbaniak for the treatment of avascular necrosis of the femoral head. MATERIAL AND METHODS: Sixteen patients, mean age 39 years 4 months at surgery, were evaluated at mean 3 years 6 months follow-up (minimum 15 months). Mean pain score (analog visual scale) was 6.25/10. Mean Postel-Merle-d'Aubigné (PMA) function score was 12. The Ficat classification was grade 2A (n=9) or grade 2B (n=7). RESULTS: There were no cases of infection or migration of the fibula. The only complication at the donor site was one case of paresia of the long extensor of the hallux which resolved spontaneously. There were five failures which required a hip prosthesis (31%). Three failures occurred early during the first 18 months. Two were late. These patients had grade 2B (n=4) or grade 2A (n=1) necrosis. At last follow-up, eleven hips had not required prosthetic revision (69%). The pain score improved in 81% of patients: mean score=2.3. Nine patients were satisfied or very satisfied (81%). Among these eleven hips, function was good or excellent in eight (72%). Walking distance was improved in nine patients, unchanged in one and worse in one. Joint motion improved in nine patients, was unchanged in one and decreased in one. Nine patients resumed their full-time job. Mean sick leave was 13.3 months. Radiographically, only two of the initial Ficat grade 2A hips remained at this stage. Likewise only one of the three hips initially rated grade 2B remained at this stage. Overall radiographic results were: failure (n=5), worsening (n=9), stabilization and no improvement (n=2). Among the nine 2A hips, one was converted to a total hip prosthesis and five femoral heads remained spheric. Among the seven 2B hips, four were converted to a total hip prosthesis and two femoral heads collapsed. DISCUSSION: At mean follow-up (3.5 years), 69% of the hips had not required total hip arthroplasty. The grade 2A hips did better but the small sample size did not allow statistical comparison. There was a clear discordance between the clinical presentation and the radiographic findings among the hips which were not treated with a prosthesis: good function score, maintained occupational and daily life activities contrasting with unfavorable radiographic evolution. Results could be improved by detailed quantification of the lesion using 3D imaging and by associating intraoperative navigation.

Adult↗
PubMed1989

[Complications following hip joint prosthesis].

Complications seen after long-term follow-up examinations of total hip replacement should be treated immediately and completely. In the past decade a considerable increase in revisions has been noted. Radiographic assessment may be regarded as an effective means in diagnosing prosthetic complications from the surgeon's point of view. Examples are given. The difficulties in radiographic assessment of complications after cementless implantation or cemented prostheses without contrast media are mentioned. Prosthesis-related complications, such as mechanical loosening, infection with and without loosening, fatigue fractures and wear, fractures of the femur or pelvis, dislocations and surgical failures, are illustrated, as are clinical courses with gross loss of bone stock after repeated surgery and delayed revisions. Complications not related to the prosthesis such as periarticular ossification, muscle deficiencies, and nervous and vascular lesions are also explained using examples.

Hip Prosthesis↗
PubMed2002

The use of snowboard boot bindings in a hip disarticulation prosthesis.

This report describes a new technique for fastening a hip disarticulation socket. It was developed at the request of the patient who needed to fasten his prosthesis using only one hand, because of a left upper limb disability. Snowboard boot bindings were secured to the socket of the prosthesis and allowed it to be securely fastened and released using his dominant hand only. The design of the bindings permitted a high closing force with minimum one-handed effort by the user.

Adult↗