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At least 91 records · Page 5Linked to original sources
PubMed1982

[Total hip-joint prosthesis. Critical long-term review of the new McKee Arden CAD stem prosthesis as compared with the usual McKee Arden prosthesis].

The article makes a comparison between the results of total arthroprosthesis operation of the hip with traditional Mckee Arden prosthesis (50 cases operated in the two-year period 1976-77) and those with the new McKee Arden model with C.A.D. stem (52 cases operated in the two-year period 1977-78). All operations were performed at the "G. Pini" Orthopaedic Institute by the same team and with the same surgical technique. The results are based mainly on three parameters (according to McKee): pain, amplitude of movement, and need to use supports. THe Authors conclude by stressing the efficiency of the new model of prosthesis and noting a decrease in intra and post-operative complications.

Adult↗
PubMed1997

[Temporomandibular joint prosthesis. A retrospective study from 1947].

Degenerative troubles of the temporo-mandibular joint constitute a major pathology for the maxillo-facial surgeon. While articular replacements have long been developed and used by orthopedic surgeons, none of these seem to give satisfaction in the TMJ. After a short historical and physiological recall, a number of techniques are described, together with a short evaluation of their use. In all 597 cases are reported, whilst an attempt at classification is made in the different types of prostheses used, ie interpositional, endo-osseous, extra-cortical, and prostheses designed for extensive reconstruction.

Alloys↗
PubMed2001

[Problems with the metacarpophalangeal joint in the surgical treatment of osteoarthritis by inserting an ARPE type joint prosthesis].

Progressive ankylosis of the trapeziometacarpal joint in flexion-adduction with closure of the first web in advanced trapeziometacarpal osteoarthritis gradually leads to compensatory dislocation of the metacarpophalangeal joint with hyperextension in the sagittal plane and abduction in the frontal plane. This deformity of the MP joint, initially reducible, but subsequently irreducible, results in the classical 'Z' deformity of the thumb in the sagittal plane. A less well known 'Z' deformity can also occur in the frontal plane due to distension of the medial collateral ligament. Surgical treatment of trapeziometacarpal osteoarthritis by arthroplasty must correct this secondary deformity of the MP joint to obtain an optimal result. The classical sagittal 'Z' deformity of the thumb can be easily corrected while this deformity is still reductible by releasing the fist metacarpal by tightening the abductor pollicis longus. When it is irreducible, this deformity can only be treated by MP arthrodesis, which contraindicates insertion of the ARPE trapeziometacarpal implant. Correction of the frontal 'Z' deformity of the thumb requires repair of the medial collateral ligament of the MP joint by ligamentorraphy (retightening) or ligamentoplasty.

Arthroplasty, Replacement↗
PubMed1994

Temporomandibular joint reconstruction of the complex patient with the Techmedica custom-made total joint prosthesis.

A study of 56 patients (55 female, one male) with 100 reconstructed temporomandibular joints (TMJ) using the Techmedica custom-made total joint system (Techmedica Inc, Camarillo, CA) is presented. The patients ranged in age from 15 to 61 years (average, 39 years) and had 16 to 46 months' follow-up (average 30 months). Outcome groups were categorized as good, fair, or poor, based on clinical assessment. Results show that 35 patients (63%) with 58 joints (58%) had a good outcome, and 13 patients (23%) with 26 joints (26%) had a fair outcome, and 8 patients (14%) with 16 joints (16%) had a poor outcome. Patients with one or no previous temporomandibular joint surgeries had 86% in the good group, 14% in the fair group, and no patients in the poor group. In patients with two or more previous surgeries, the success rate decreased to 55% with good results, 26% with fair results and 19% with poor results. Long-term morbidity included five ramus prostheses that were removed or revised. Seventeen patients (30%) received further operations because of heterotopic bone formation, fibrosis, calcification, inflammation, and/or pain which occurred mostly in patients with previous Proplast/Teflon (Vitek, Inc, Houston, TX) implants. Continued pain has been associated with the poor group, which may be related to problems such as cervical neuropathy, sympathetic dystrophy, a residual inflammatory or immunologic reaction to Proplast/Teflon or silastic particles, fibrosis, calcification, heterotopic bone, or other unidentified factors.

Adolescent↗
PubMed1998

Loading of a unilateral temporomandibular joint prosthesis: a three-dimensional mathematical study.

The load on the prosthetic side and the influence of the design on the remaining natural contralateral TMJ must be known before a unilateral temporomandibular joint (TMJ) prosthesis can be developed. The aim of the present study was to determine the maximum loading of the TMJ prosthetic side and the natural contralateral TMJ and to investigate the influence of the location of the center of rotation of the prosthesis on the maximum loading. For this purpose, a mathematical model of the mandible with a unilateral TMJ prosthesis with a fixed center of rotation (CR) was developed. The location of the CR of the TMJ prosthesis was varied from the middle of the natural mandibular condyle to 15 mm inferior to this location. Although the maximum joint reaction forces changed as a result of a unilateral TMJ prosthesis, the trend of the loading curves was similar to that of an intact mandible. A unilateral TMJ prosthesis resulted in a 50% higher loading of the prosthetic side, while the load on the natural contralateral TMJ remained within normal limits. The maximum load on the prosthetic side occurred during molar bites and could reach 100 N in the cranial direction, 30 N in the ventral direction, and 25 N in the medio-lateral direction. The location of the CR did not have a significant influence on the loading of the TMJ prosthesis and the natural contralateral TMJ.

Adult↗