RADIOGRAPHICAL EVALUATION OF Sr-HASi BIOCERAMIC SUBSTITUTE FOR CRITICAL SIZE BONE DEFECT IN A GOAT – CLINICAL ST

Abstract

Strontium (50%) incorporated calcium hydroxyapatite coated with silica based ceramic (Sr-HASi) is a biodegradable graft substitute used in the treatment of bone defects and osteoporotic conditions. The material was reported to degrade in par with the regrowth of bone tissue, but a long term clinical study to assess the fate of the material was lacking. The study was done in a two month old male Jamunapari cross bred kid with distal comminuted fracture of metacarpal bone and treated by bioceramic graft substitution. Radiography was used for evaluating the changes of the graft and time taken for degradation, along with evaluation of bone healing. Postoperative orthogonal views of the graft substituted bone was taken on 2nd, 4th, 6th, 8th and 24th week after surgery. The graft was found to remain stable and completely radiopaque till 4th week and thereafter signs of gradual degradation could be noticed. On the radiograph taken after twenty four weeks, the central core of the graft material got completely degraded leaving only the peripheral outline. The graft material remained intact and well incorporated within the bony callus till the secondary callus development was complete and degradation was noticed once the remodelling process has started. Hence, it was concluded that complete resorption of the material might require more than six months in a clinical situation

Keywords

• bioceramic graft
• sr-hasi
• comminuted fracture
• critical size defect