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Tissue reactions to breast implants coated with polyurethane.
The histological features noted in the capsules from 7 polyurethane coated silicone breast prostheses are described. The polyurethane provoked a definite foreign body reaction and was slowly degraded, with some particles ejected from the capsule into the surrounding tissues. Separation of the polyurethane coating from the silicone prosthesis and the degradation of the polyurethane took about two years. Another much more resistant foreign material was found to occur in conjunction with the polyurethane in the capsules. It may be an adhesive or flakes off the silicone shell. Vacuolated spaces were noted in the inner layers of 3 capsules; it was assumed that they contained liquid silicone.
[The effect of active removable orthodontic appliances on the dental enamel].
It could be demonstrated that enamel defects which are caused by maxillo-facial fixing elements of actively removable implements were reproducible in laboratory experiments. With minimal pressure of the wire bow of 50 grams and 250,000 lift, or individual vertical movements on the enamel surface resulted in a micrometer area of scouring.
The biologic and physical criteria for suture selection in cataract surgery.
This paper has disucssed histochemical, physical, and clinical considerations involved in proper suture selection for cataract surgery. Guidelines are proposed so that the surgeon can employ a standard method for evaluating each suture's performance. Accordingly, the surgeon can select the proper proper suture to satisfy his needs regardless of his operative technique.
Effects of copper intravasal device on the fertility of rat.
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Starch granuloma of the urinary bladder.
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[Foreign body granulomatous cyst of mesentery: a review of the literature and report of a case (author's transl)].
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The Herbert total knee replacement: a longer than three year follow-up.
Thirty personally performed Herbert total knee replacements, evaluated during a 3-year follow-up, were found not to function well. At the end of one postoperative year 6 knees had symptomatic metal synovitis and required replacement. By the end of 3 years the Herbert total knee replacement had functioned in only 12 patients. The largest single follow-up complication was foreign body synovitis, inflammation of the synovium secondary to small free metal fragments produced by the 2 components rubbing against each other during gait.
[Angiography of foreign body granuloma caused by gause, gauseoma (author's transl)].
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[Morphological changes in the subcutaneous connective tissue of rats implanted with the polymers used in stomatology].
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Epidermal lining in the capsule of a breast prosthesis.
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[Products due to wear in the tissues around the hip joint following hip joint implantations (author's transl)].
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[Local infection treatment in general, thoracic and vascular surgery. Fistula problem in soft tissue surgery - skin fistulas].
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Schistosomiasis--cancer: etiological considerations. A review.
Evidence for a causal connection between Schistosoma haematobium-infection and carcinoma of the urinary bladder is discussed. A group relationship of schistosomiasis cancer to cancers as+sociated with asbestosis, foreign body implants, and cicatrization is suggested on the basis of several criteria. Results of experimental foreign body tmuorigenesis in mice are presented and elaborated in relationship to schistosomiasis cancer. Carcinogenic development at the cellular level is discussed with emphasis on the essential role of tissue-environmental conditions, especially fibrotic changes and macrophage quiescence.
The demarcation of the foreign body (polymers).
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Tissue response to proplast in an experiment.
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[Uterine hemorrhage during intrauterine contraception. Pathophysiology and therapy].
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The osteoninductive property of decalcified bone matrix. An experimental study,.
Demineralised homologous bone-matrix implant was used to bridge a large circumferential osteoperiosteal gap in the diaphysis of the ulna of rabbits. Periodic observations of the graft were made clinically, radiologically, histologically and by tetracycline fluorescence up to forty-two weeks. By the twelfth week after operation 81 per cent of the animals revealed bone formation in the implant and complete bridging of the gap. The new bone was laid on the surface and in the substance of the matrix, suggesting that the inductive principle was acting locally. The bone, once formed, remodelled to the texture of a mature tubular bone and did not undergo absorption during a long follow-up period. Demineralise bone-matrix proved to be a highly osteoinductive and readily osteoconductive material. The graft did not evoke any appreciable local foreign-body or immunogenic reaction. The high degree of success in bridging massive bone defects justifies further serious studies and hopes for a useful substitute for massive autologous bone grafts.