Restorative Dentistry and Endodontics
- 제14권2호
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- Pages.49-64
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- 1989
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- 2234-7658(pISSN)
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- 2234-7666(eISSN)
치근단 손상부의 치유에 영향을 미치는 제재에 관한 병리조직학적 연구
HISTOPATHOLOGIC STUDY ON THE HEALING PROCESS OF APICAL WOUND IN APPLYING SEVERAL MATERIALS
- 조영곤 (조선대학교 대학원 치의학과)
- Cho, Young-Gon (Department of dentistry, Graduate School, Chosun University)
- 발행 : 1989.09.25
초록
The purpose of this study was to evaluate the effect of several materials on the healing process of apical wound. Sixteen mandibular premolars obtained from 4 healthy dogs were used for this study. Under general anesthesia, the pulpal chamber of each tooth was opened and the pulps were extirpated. The root canals were then instrumented with H-file and irrigated with physiologic saline solution ; the apices were purposely perforated and enlarged with the engine K-reamer. In the experimental groups, apical wounds were filled with one of calcium hydroxide, hydroxylapatite, and tricalcium phosphate materials, mixture of each materials and physiologic saline solution, with a lentulo spiral. In the control group, apical wounds were not filled with any material. All the root canals were filled by the lateral condensation technique with gutta-percha cone and ZOE sealer. The access opening of all the teeth were closed with amalgam. On the 10, 20, 40 and 60th day after experiment, experimental animals were sacrificed. Segments of jaws, each containing one tooth, were fixed in 10% formalin solution and decalcified in Plank-Rychlo solution. The specimens were embedded in paraffin and serially sectioned to an average thickness of
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