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미성숙 치아 모델에서 포스트의 종류와 크기가 치아의 파절 저항성에 미치는 영향에 관한 연구

Other Titles
 INFLUENCE OF POST TYPES AND SIZES ON FRACTURE RESISTANCE IN THE IMMATURE TOOTH MODEL 
Authors
 Jong-Hyun Kim  ;  Sung-Ho Park  ;  Jeong-Won Park  ;  Il-Young Jung 
Citation
 Journal of Korean Academy of Operative Dentistry (대한치과보존학회지), Vol.35(4) : 257-266, 2010 
Journal Title
Journal of Korean Academy of Operative Dentistry(대한치과보존학회지)
ISSN
 1225-0864 
Issue Date
2010
Keywords
Immature tooth ; Fracture resistance ; Fiber post ; Titanium post ; EverStick� Post ; Post size
Abstract
The purpose of this study was to determine the effect of post types and sizes on fracture resistance in immature tooth model with various restorative techniques. Bovine incisors were sectioned 8 mm above and 12 mm below the cementoenamel junction to simulate immature tooth model. To compare various post-and-core restorations, canals were restored with gutta-percha and resin core, or reinforced dentin wall with dual-cured resin composite, followed by placement of D.T. LIGHT-POST, ParaPost XT, and various sizes of EverStick Post individually. All of specimens were stored in the distilled water for 72 hours and underwent 6,000 thermal cycles. After simulation of periodontal ligament structure with polyether impression material, compressive load was applied at 45 degrees to the long axis of the specimen until fracture was occurred. Experimental groups reinforced with post and composite resin were shown significantly higher fracture strength than gutta-percha group without post placement (p < 0.05). Most specimens fractured limited to cervical third of roots. Post types did not influence on fracture resistance and fracture level significantly when cement space was filled with dual-cured resin composite. In addition, no statistically significant differences were seen between customized and standardized glass fiber posts, which cement spaces were filled with resin cement or composite resin individually. Therefore, root reinforcement procedures as above in immature teeth improved fracture resistance regardless of post types and sizes
Files in This Item:
T201003412.pdf Download
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Conservative Dentistry (보존과학교실) > 1. Journal Papers
Yonsei Authors
Park, Sung Ho(박성호) ORCID logo https://orcid.org/0000-0003-2171-235X
Park, Jeong Won(박정원) ORCID logo https://orcid.org/0000-0002-2517-8150
Jung, Il Young(정일영) ORCID logo https://orcid.org/0000-0001-8972-2664
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/102178
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