하악 제1, 2대구치 단일 임플란트의 생존율에 관한 연구
The study on success rate of single implant replacing the mandibular first and second molars
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연구 목적: 치과 임플란트가 소개된 이후로 단일 치아 상실에 따른 임플란트 수복에 관한 성공적인 연구 결과들이 보고되고 임상적으로도 널리 사용되고 있다. 구강내의 다양한 부위에 따른 연구들이 있어 왔으나, 교합력이 강한 구치부 특히 하악 구치부에서 단일 임플란트에 관한 연구가 필요할 것이다. 본 연구는 하악의 제1대구치와 제2대구치 부위에 식립된 단일 임플란트의 생존율에 관해 연구, 분석하였다. 연구 대상 및 방법: 2002년부터 2009년까지 대구광역시 소재의 7개 치과의원에서, 하악 제1, 2대구치에 단일 임플란트 치료를 받은 환자 284명에게 식립된 308개의 임플란트를 대상으로 하였다. 하악 제1대구치에 168개의 임플란트가 식립되었고, 하악 제2대구치에 140개의 임플란트가 식립되었다. 이들 임플란트는 식립위치, 환자의 성별, 연령, 임플란트의 직경 및 길이에 따라 분석하였다. 결과: 하악 제1대구치에서는 4개의 임플란트가, 하악 제2대구치에서는 10개의 임플란트가 실패하였다. 하악 제1대구치에서는 97.6%, 하악 제2대구치에서는 92.9%의 성공률을 나타내었다. 환자의 연령, 성별, 식립방법, 임플란트의 직경 등에 따른 차이는 관찰할 수 없었다. 결론: 하악 제1대구치 단일 임플란트의 생존율은 하악 제2대구치 단일 임플란트의 생존율보다 높게 나타났다. 이는 하악 제2대구치 부위의 골질이 좋지 않고, 하악의 해부학적인 구조로 인해 하악 제2대구치 부위에 과도한 교합력이 가해질 우려가 있기 때문이라 생각된다.
Abstract
Purpose: After the introduction of concept of osteointegration, dental implantology have been successful procedure in the dental field. Recently, it has shown successful results when used to restore single tooth missing. Considering the difference in bone quality of the mandible and maxilla, and the increased occlusal force in the posterior region, the success rates in each region may be different. In this study, success rates of single implants placed in the mandibular first and second molar areas were analyzed. Materials and methods: The subjects were patients (284 patients, 308 implants) who had been operated with single implant installation from 2002 to 2009 in seven dental clinics in Daegu city. One hundred sixty eight implants were placed in the mandibular 1st molar and 140 implants were placed in the mandibular 2nd molar. They were analyzed according to implant site, age, sex, length and diameter. Results: The survival rates of single implant of this study were 97.6% in the mandibular 1st molar and 92.9% in the mandibular 2nd molar. In the mandibular 1st molar, 4 implants were failed. In the mandibular, 2nd molar, 10 implants were failed. Conclusion: The restoration of the mandibular 1st molar using single implant was found to be clinically acceptable treatment and showed higher survival rate than mandibular 2nd molar single implant. Single implant in mandibular 2nd molar needs careful consideration of poor bone quality, risk of overloading and anatomical structure of the mandible.
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