ABSTRACT
A simple method to take macrophotographs that show details even in the microsurgical field was discussed. The method uses any single lens up to 80 mm or any zoom lens in the reverse position with a single-lens reflex camera. In this manner, high reproduction ratios larger than the actual size of the object can be achieved.
Subject(s)
Microsurgery/instrumentation , Photography/instrumentation , Surgery, Plastic/instrumentation , Documentation/methods , Equipment Design , HumansABSTRACT
The behavior, under burn scars, of three different alloplastic materials, silicone, Medpor and Proplast, was compared in an animal model. A standard burn wound was created in rats, and 3 months later silicone, medpor and proplast alloplasts were placed under the burn scar. The rats were followed for another 3 months and ulceration and/or alloplast exposure rates were evaluated. At the end of this period specimens were examined histologically for the thickness of the fibrous capsule around the implant, thickness of the overlying tissue, tissue ingrowth and vascularization of the implants. Ulceration and exposure occurred in 2 of the 12 Medpor, 2 of the 12 Proplast and none of the 12 silicone implants. Fibrous capsule was significantly thicker around the silicone implants. Tissue ingrowth and vascularization were most prominent in Medpor implants while thickness of the overlying tissue was maximum in Proplast implants. These findings suggest that complications with silicone implants may be less than with other porous implants when used under burn scarred tissue.
Subject(s)
Biocompatible Materials/administration & dosage , Burns/surgery , Cicatrix/pathology , Polyethylenes/administration & dosage , Proplast/administration & dosage , Silicones/administration & dosage , Analysis of Variance , Animals , Burns/pathology , Burns/physiopathology , Disease Models, Animal , Female , Prostheses and Implants , Random Allocation , Rats , Rats, Sprague-Dawley , Reference Values , Wound Healing/physiologyABSTRACT
An experimental study in adult rats was designed to test whether infant dura, when transplanted as an isograft to different recipient beds, can maintain its osteogenic potential. There was bone regeneration in more than 50% of the defects in all animals in which infant dura was present. There was minimal bone regeneration in defects in which adult dura remained alone and in which the dural defect repaired with adult dural graft. Ectopic bone did not form on the abdominal fascia or in the abdominal muscles from either infant or adult dural transplantation.
Subject(s)
Bone Regeneration/physiology , Brain Tissue Transplantation/physiology , Dura Mater/physiology , Dura Mater/transplantation , Osteogenesis/physiology , Animals , Rats , Rats, Sprague-Dawley , Skull/surgery , Statistics, Nonparametric , Wound Healing/physiologyABSTRACT
A small rectangular wire loop was designed to harvest dural graft from rats. This loop was used successfully to take 40 dural grafts from 20 infant and 20 adult rats. The technique is presented in detail.
