하악 구치부에 식립한 sintered porous surfaced implants의 후향적 다기관 연구
A Retrospective Study of Sintered Porous-surfaced Dental Implants in Restoring the Edentulous Posterior Mandible: Up to Eight Years of Functioning
김우성, 신임희, 안경미, 손동석, 정희승,
소속 상세정보
김우성 ( Kim Woo-Sung ) - 대구가톨릭대학교 의과대학 치과 구강악안면외과학교실
신임희 ( Shin Im-Hee ) - 대구가톨릭대학교 의과대학 의학통계학교실
안경미 ( An Kyoung-Mi ) - 대구가톨릭대학교 의과대학 치과 구강악안면외과학교실
손동석 ( Sohn Dong-Seok ) - 대구가톨릭대학교 의과대학 치과 구강악안면외과학교실
정희승 ( Jung Heui-Seung ) - 대구 서문치과
KMID : 0362720090470120823
Abstract
Purpose : The aim of this study was to evaluate the survival rate of sintered porous-surfaced implants placed in the edentulous posterior mandibles, in relation to implant length and diameter, crown-to-implant ratio, and types of prostheses, for a maximum of eight years of functioning.
Material and Methods : The study group consisted of 43 partially edentulous patients who visited Catholic University Hospital of Daegu and one private dental clinic. A total of 122 sintered porous-surfaced implants -- Endopore?? (Innova Life Sciences, Toronto, Ontario, Canada) -- were placed in the edentulous posterior mandibles. Two diameter sizes (4.1㎜ and 5.0㎜) and four lengths (5.0㎜, 7.0㎜, 9.0㎜, and 12.0㎜) were used. One hundred and three implants were splinted and 21 implants were nonsplinted. The survival rates of the implants in relation to length, diameter, crown-to-implant ratio, and types of prostheses were investigated. Statistical data were analyzed using SPSS Win.Ver 14.0 software with the Chi-square test.
Results : The survival rate of the 4.1mm diameter implants was 100% and 91.2% for the 5.0㎜ diameter implants. The survival rates of the implants of differing diameters were found to be statistically different (p=0.005). The survival rates of both the 5.0㎜ and 7.0㎜ length implants were 100%. The survival rate of the 9.0㎜ length implants was 97.9% and for the 12.0㎜ length implants was 95.1%. There was no statistical difference in survival rates for the differing lengths of implants. Of the 103 prostheses that were splinted, the survival rate was 98.0%. The survival rate of splinted prostheses was higher than that of the non-splinted prostheses, but was found to be not statistically different. There were no failed cases when the crown-to-implant ratio was under 1.0. When the crown-to-implant ratio was between 1.0 and 1.5, the failure rate of the implants was 6.7%. No failure was recorded with the ratio range of 1.5 to 2.0. Relative to the crown-to-implant ratio of 1.0, the failure rates were statistically different (p=0.048).
Discussion and Conclusion : The cumulative survival rate of the porous-surfaced implants placed in the edentulous posterior mandibles was 97.5%. Short porous-surfaced implants showed satisfactory results after a maximum of nine years of functioning in the edentulous posterior mandibles.
키워드
porous-surfaced dental implan;posterior mandible;survival rate;crown-to-root ratio;implant size
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