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At least 1,315 records · Page 73Linked to original sources
PubMed1988

Replantation of an autoclaved autogenous segment of bone for treatment of chondrosarcoma. Long-term follow up.

Seven patients who had a low-grade chondrosarcoma of the proximal part of the humerus or femur were treated by resection, autoclaving of the excised segment, and reinsertion of that segment with supplementary fresh autogenous grafts. The length of follow-up ranged from fourteen to twenty-four years, and sequential roentgenograms were made during the follow-up period. A biopsy of the autoclaved segments was done in one patient eleven years after the operation, and examination of the specimen showed predominantly live bone; there were very few spicules of dead bone. Although the principal roentgenographic changes were demonstrated by the end of the first year, serial roentgenograms showed a continuing process of remodeling for two decades. No secondary procedures were required for treatment of fracture, resorption, infection, or loss of function.

Adult↗
PubMed1976

[Early general complications of total hinged knee prosthesis].

16 early deaths (within 24 hours) were observed after 758 knee joint replacements. In eight instances the patient died during the operation, and the other eight few hours later. The author discussed several possible causes: toxicity of the monomere, fat embolism hyperpressure in the medullary canal, hemorrhage. Several per and post operative precautions are recomanded.

Anesthesia, General↗
PubMed2006

NeuFlex compared with Sutter prostheses: a blind, prospective, randomised comparison of Silastic metacarpophalangeal joint prostheses.

Forty patients (156 metacarpophalangeal joints) with mutilating rheumatoid arthritis were randomly allocated in a blinded manner to have either NeuFlex or Sutter implants. Indications for operation were pain and severe deformity. Thirty-nine patients were followed up postoperatively for one year. An independent physiotherapist and occupational therapist examined each one. Grip strength, range of motion, and pain during activity and at rest were measured. The Canadian Occupational Performance Measure (COPM) assessed the patients' evaluation of their occupational performance. Both groups had overall good results, but it seems that though patients' mobility and grip strength improve considerably, pain seems to do so only relatively. Most patients seem to be satisfied with the operation and their functional gain. Five out of 78 Sutter and two out of 78 NeuFlex implants broke. We found no major differences between the two designs, but the patients in the NeuFlex group seemed to be more satisfied with their occupational performance (COPM performance) (p=0.05).

Adult↗
PubMed1998

A prospective randomized comparison of Sutter and Swanson silastic spacers.

This study compares two currently available prostheses for the reconstruction of rheumatoid joints. A single operator performed 72 resection arthroplasties with Swanson or Sutter prostheses being randomly allocated. Assessment of each patient was carried out preoperatively, and at 6 months and 12 months postoperatively by a single investigator. In the Swanson group an improvement of the flexion arc was seen, from 29 degrees to 44 degrees at 6 months but this reduced to 36 degrees at 12 months. In the Sutter group there was no significant difference between flexion arcs pre- and postoperatively. Grip strength improved in the Swanson group, but not in the Sutter group. Extensor lag was improved in both groups. Patient satisfaction measured by linear analogue scales for pain, function and deformity was high in both groups.

Aged↗
PubMed1986

[Long-term results after the surgical treatment of saddle joint arthrosis with Swanson's silastic prosthesis].

The use of a silastic implant in resection arthroplasty of the carpometacarpal joint of the thumb allows the joint space to be preserved. With the Swanson type arthroplasty relief of pain, good function, as well as stability and improved pinch force can be obtained, avoiding the consequence of carpal instability by narrowing of the joint space associated with resection of the trapezium alone or in combination with tendon interposition arthroplasty. The two main problems associated with Swanson arthroplasty are prosthetic dislocation and longterm stability of the prosthesis itself. The joint surface of the prosthesis wears out asymmetrically, and mild to severe foreign body reactions can be seen in the carpal bones, mainly the scaphoid. Clinical and radiological results of a series of 77 operations in 65 patients from 1975-1981 are presented and discussed.

Adult↗
PubMed1989

[Polyethylene wear and late loosening of a total prosthesis of the hip joint. New perspectives for metal/metal pairing of the capsule and head].

Twenty-nine years' experience with total hip replacement surgery, including continuing quality control and follow-up studies, indicate that late loosening after 10-15 years is related to wear of the polyethylene cup. Metal-to-metal prostheses implanted 20 years ago and longer, on the other hand, show no signs of wear or loosening. In conclusion, polyethylene does not last long enough when compared to biocompatible precision-made artificial metal-metal hip joints.

Biocompatible Materials↗
PubMed1991

Use of a hinged silicone prosthesis for replacement arthroplasty of the first metatarsophalangeal joint.

A series of ninety consecutive total joint replacements of the first metatarsophalangeal joint with a flexible hinged prosthesis was reviewed after an average duration of follow-up of three years (range, twenty-four to sixty-one months). Although subjectively the results were satisfactory in most of the patients, and pain, the most common preoperative symptom, was reduced, mechanical failure of the implant was common, as determined radiographically. The frequency of failure of the implant and the extent to which it failed were related to the length of time that the implant had been in place. The range of motion of the metatarsophalangeal joint was decreased from normal. Dorsiflexion averaged 26 degrees and plantar flexion, 18 degrees. Callosities under at least one metatarsophalangeal joint were noted in fifty (69 per cent) of the feet that had a physical examination. Pedobarographic analysis of the distribution of plantar pressure revealed that none of the patients exerted weight-bearing pressures on the affected great toe. However, the subjective results were not significantly associated with radiographic evidence of failure of the implant. Despite its success in relieving the symptoms in our patients, we have abandoned this procedure because of the high and increasing rate of failure of the implant, as demonstrated radiographically.

Adult↗
PubMed1997

Crack-growth properties of various elastomers with potential application in small joint prostheses.

Silastic small joint spacers for the metacarpophalangeal joint fail catastrophically at a reported rate ranging from 2 to 26%. Although the exact cause of this problem is not known, it is speculated that failure is due to the propagation of flaws generated in the material surface. In addition to wear secondary to bony impingement, these flaws can be introduced through manufacturing, surgical handling, and in vivo frictional wear. In an effort to identify an elastomeric material that will function similarly to Silastic as a self-hinging joint spacer but provide an increased functional life, we have investigated and compared the crack-growth properties of two polyurethanes, ChronoFlex and Medicaflex, and a thermoplastic elastomer, Santoprene, with those of Silastic. The materials were evaluated after sterilization by either ethylene oxide or gamma irradiation in an ASTM standard flexing machine under conditions of high humidity and body temperature both before and after artificially aging. In each case, the materials investigated presented significantly lower crack-growth rates than Silastic (p < 0.001).

Biocompatible Materials↗