Experimental osteotomy fixed with a composite resin.

Some composite resins used in dentistry are claimed to have qualities superior to those of the commercial bone cements. A bis-GMA composite resin was used for the fixation of experimental tibial osteotomies in rats. The osteotomies were fixed with bis-GMA in 84 rats, while intramedullary nailing was used in 28 rats. In 28 rats used as controls the osteotomy was left unfixed. Radiologic, histologic, microradiographic and oxytetracycline (OTC) fluorescence studies were performed after 1,2,3,6, 12, 18 and 24 weeks. The most favorable results as regards the healing of osteotomy were obtained in the intramedullary nailing group, but the results with bis-GMA fixation were more favorable than those obtained in the untreated group. It is concluded that the material employed is suited for the fixation of osteotomies and that the bone tolerated the tested material well.