치과 임플랜트 시술시 골천공기구의 회전속도가 주위 골조직의 온도 및 골일체성에 미치는 영향에 관한 연구
A STUDY ON THE EFFECT OF ROTATIONAL SPEEDS OF THE TREPHINE MILL ON THE TEMPERATURE OF SURROUNDING BONE DURING DENTAL IMPLANTATION PROCEDURE AND OSSEOINTEGRATION OF IMPLANTS
이진걸, 양재호, 이선형,
소속 상세정보
이진걸 ( Lee Jin-Geol ) - Seoul National University College of Dentistry Deptarment of Prosthodontics
양재호 ( Yang Jae-Ho ) - Seoul National University College of Dentistry Deptarment of Prosthodontics
이선형 ( Lee Sun-Hyung ) - Seoul National University College of Dentistry Deptarment of Prosthodontics
KMID : 0362819920120010001
Abstract
Frictional heat produced by cutting tools during dental implantation procedure may destroy the surrounding bone tissue and regenerative capacity and interfere ossointegration by formation of undifferentiated connective tissue. To study the effect of frictional heat according to various rotational speeds on the regenerative capacity of surrounding bone tissue, 13 ITI HS implants (8 mm) were inserted at 4 mongrel dogs. Temperatures were measured using thermocouple located 6 mm below from the marginal crest and 0.5 mm from the periphery of trephine mill during implant bed preparation. After 4 and 9 months, animals were sacrificed and specimens were examined using x-rays and light microscope. Results were as follows: 1. With drill speeds of 300，800，2,000, 3,500 rpm and saline irrigation, temperatures of surrounding bone were decreased from -2.9° to -1.7°C. Temperature rises of 2.0° and 2 .1°C were recorded with a drill speed of 5,000 rpm and irrigation. 2. With drill speeds of 800，3,500, 5,000 rpm and no irrigation, temperatures of surrounding bone rose from +1.5° to +6.8°C, but maximum temperature was 40°C at 5,000 rpm. 3. On radiographic examination, bone resorptions were observed at the upper half of implant of 5.000 rpm without irrigation and one case of 5,000 rpm with irrigation. 4. Osseointegration was unsuccessful in cases of 3,500, 5,000 rpm without irrigation due to fibrous connective tissue formation to the outer surface and hollow, but it was successful in a case of 800 rpm without irrigation. 5. Osseointegration was successful in cases of 300，800，2,000 and 3,500 rpm with irrigation. But fibrous connective tissue formation was observed at the hollow of implant inserted with 5.000 rpm with irrigation.
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