Journal of implantology and applied sciences ISSN:2765-7833(Print) 2765-7841(Online) 대한구강악안면임플란트학회지

"When dental Implants are installed in the alveolar bone which needs augmentation, various methods are being used. Among those, method of using bone graft to alveolar bone augmentation is more commonly used. Based on the immunity, this study had put graft bone into groups of ; autogenous bone graft group, allogenous bone graft group, xenogenous bone graft group and control group. In the case of autogenous bone graft group, bones taken from the skull of same rabbit were used without being altered ; in the allogenous bone graft group, bones taken from different skulls of same kind of rabbit were treated through deproteinized process ; xenogenous bone graft group used bovine cancellous bone after deproteinized process. This study was designed to evaluate the stability of implant with RFA(resonance frequency analyser), histologic observation and histomorphometric analysis. Threaded type titanium dental implants were placed with various bone grafts on tibias of 18 rabbits. Placed implants were measured RFA, immediately after the procedure, and every 4 weeks during next 16 weeks. After 16 weeks, 8 rabbits survived and were sacrificed for histologic analysis. 1. RFA value was diminished in order of autogenous graft group, xenogenous graft group, control group, allogenous graft group. But, only RFA value between allogenous graft group and autogenous graft group was statistically significant (p<0.05). 2. RFA measurement, as elapsed time, was increased significantly in each period except on the forth week and on the eighth week (p<0.05). 3. No born growth was seen on the exposed area of implant in control group but bone growth was seen in other groups according to graft. Autogenous graft group showed the best bone formation histologically. 4. Histomorphometric analysis value was diminished in order to xenogenuos graft group, autogenous graft group, allogenous graft group, and control group. But, there was no statistical significance between groups (p>0.05). As a conclusion, measuring the stability of implant by using RFA is thought to be accomplished without damaging implant and the useful method for implant stability test and the best result could be expected from autogenous graft. But xenogenous graft and allogenous graft, also, are thought to produce not bad results if used proper method on proper area."