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KMID : 0363020080380030535
Journal of Korean Academy of Periodontology
2008 Volume.38 No. 3 p.535 ~ p.541
Analysis on cause of failure of guided bone regeneration during implant placement: A retrospective study
Ko Sun-Young

Oh Jun-Ho
Lee Seung-Jae
Kim Hyung-Seop
Abstract
Purpose: The aim of this retrospective study is to evaluate survival rate of implant and bone formation, to analyze failure contribution factor.

Material and Methods: A total of 52 consecutive patients(35 male, 17 female, mean age 49 years) with 104 osseous defects were treated during the period from October 2004 to June 2007 with a simultaneous or staged GBR approach using non-resorbable or resorbable membranes combined with autogenous bone grafts or xenograft(Bio-Oss, Bio-cera, BBP).

Result: A total of 32(30.8%) of 104 GBR-treated sites failed the bone formation and a total of 5(5.6%) of 89 implants were removed. Early exposure of the membrane has significantly affected bone formation(p<0.05). Non-resorbable membrane showed more exposure of the membrane and low success rate of bone formation than resorbable membrane(p<0.05). There were no difference between success rate of bone formation and using autogenous bone or graft materials. There were no statistically significant difference between success rate of bone formation and smoking or using PRP. Mandible showed more success rate of bone formation than maxilla(p<0.05).

Conclusion: Early exposure of the membrane, membrane type and maxilla/mandible type have influence on success rate of bone formation during GBR.
KEYWORD
Guided bone regeneration, implant failure, implant survival rate
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