J Korean Assoc Maxillofac Plast Reconstr Surg.  1997 Feb;19(1):45-54.

Biomechanical Study of The Calvarial Defects After Implantation of The Toothash And Plaster In The Rat

• Kim YK
• Ko YM

Abstract

The purpose of this investigation was to determine the biomechanical property of calvarial defects reconstructed using toothash, plaster and tooth-plaster mixture. Full-thickness bony defects were made on the rat calvaria with size of 10mm x 10mm. Group 1 was filled with toothash only, group 2: toothash-plaster mixture, and group 3: plaster only. The defects were allowed to heal for l2 and 20 weeks before killing the animals. Light microscopic examinations vas taken after 12 week after operation. The hardness was evaluated for test of mechanical property. The following results were obtained: l. In light microscopic eaxmination 12 week after operation, there were no inflammatory and foreign body reaction. Implanted particles were resorbed gradually or united directly with newly formed bone. 2. In hardness test, the hardness of newly formed bone was lower than that of normal bone and there was significant difference(P<0.01). The site of new bone formation has enough hardness to resist the mechanical stress. These results suggest that toothash and plaster are biocompatible and osteoconductive material.

MeSH Terms

Animals
Foreign-Body Reaction
Hardness
Hardness Tests
Homicide
Osteogenesis
Rats*
Skull
Stress, Mechanical