Microcasting : a Technique to Study the Vascular Supply to Porous, Subctaneous Dacron Velour, Implants
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The success of any implant is dependent on a variety of factors. One of the most influential factors is porosity. The degree of tissue ingrowth is dependent on the size and structure of pores. The ingrowth of tissue is an optimal condition, since it provides stabilization, by forming a strong tissue-implant bond, without interfering in the implant's function. However, it is also necessary that the porous material be capable of supporting a sufficient capillary system, in order to maintain viable tissue within the implant. The present study attempts to use microcasting to characterize the vascularization of a porous implant. Briefly, in this technique the vascular system of the implant area is perfused with a polymer, in order to make a microcast of the capillaries within•the implant. The implants were retrieved and the tissue surrounding the microcast and the implant was macerated. The remaining implant-microcast combination was then studied using scanning electron microscopy. Difficulties were encountered with the selection of an agent to dissolve the tissue from the implant-microcast combination.