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

A total of 246 patients (648 implants) treated with bone grafting and implant placement from June 2003 to May 2007were evaluated. We investigated bone grafting methods, bone grafting materials, implantation type (immediate implantationafter extraction or delayed implantation, submerged or non-submerged), healing time after implantation, when to start load-ing, the type of final prosthesis and implant failure. We evaluated the marginal bone loss one year after loading and the finalrecall time with a scaling tool provided in digital radiography. The crestal bone loss one year after loading and final recalltime (31.75±12.09 months after loading) were 0.15±0.43 mm and 0.31±0.65 mm, respectively. The crestal bone loss hadno statistically significant relationship with the healing time after implantation or the occlusal loading timing (p>.05). Thevertical augmentation guided bone regeneration and nasal floor augmentation methods showed more bone loss than otherbone grafting techniques (p<.05). The overdenture and fixed hybrid denture showed large crestal bone loss around the den-tal implant (p<.05). Immediate implantation made no significant difference in bone loss one year after loading but showedless bone loss at the final recall time (p<.05). Bone grafting materials, implant placement time with bone grafting (simulta-neous or delayed), and implantation type (submerged or non-submerged) had no significant difference in crestal bone loss(p>.05). In conclusion, the occlusal loading timing had no significant association with crestal bone loss around the dentalimplant, but bone grafting methods and the final prosthesis type showed significant differences in crestal bone loss.