지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.1
- 수록면
- 332 - 341 (10page)
이용수
초록· 키워드
오류제보하기
Objectives: To determine the incidence of crack formation and propagation in apical root dentin after retreatment procedures performed using ProTaper Universal Retreatment (PTR), Mtwo-R, ProTaper Next (PTN), and Twisted File Adaptive (TFA) systems.
Materials and Methods: The study consisted of 120 extracted mandibular premolars. One millimeter from the apex of each tooth was ground perpendicular to the long axis of the tooth, and the apical surface was polished. Twenty teeth served as the negative control group. One hundred teeth were prepared, obturated, and then divided into 5 retreatment groups. The retreatment procedures were performed using the following files: PTR, Mtwo-R, PTN, TFA, and hand files. After filling material removal, apical enlargement was done using apical size 0.50 mm ProTaper Universal (PTU), Mtwo, PTN, TFA, and hand files. Digital images of the apical root surfaces were recorded before preparation, after preparation, after obturation, after filling removal, and after apical enlargement using a stereomicroscope. The images were then inspected for the presence of new apical cracks and crack propagation. Data were analyzed with χ2 tests using SPSS 21.0 software.
Results: New cracks and crack propagation occurred in all the experimental groups during the retreatment process. Nickel-titanium rotary file systems caused significantly more apical crack formation and propagation than the hand files. The PTU system caused significantly more apical cracks than the other groups after the apical enlargement stage.
Conclusions: This study showed that retreatment procedures and apical enlargement after the use of retreatment files can cause crack formation and propagation in apical dentin.
목차
등록된 정보가 없습니다.
참고문헌 (24)
참고문헌 신청
Adorno CG / 2013 / The effect of endodontic procedures on apical crack initiation and propagation ex vivo / Int Endod J 46 : 763 ~ 768
Alapati SB / 2009 / Metallurgical characterization of a new nickel-titanium wire for rotary endodontic instruments / J Endod 35 : 1589 ~ 1593
Bier CA / 2009 / The ability of different nickel-titanium rotary instruments to induce dentinal damage during canal preparation / J Endod 35 : 236 ~ 238
Capar ID / 2014 / Effects of ProTaper Universal, ProTaper Next, and HyFlex instruments on crack formation in dentin / J Endod 40 : 1482 ~ 1484
Friedman S / 1992 / Efficacy of removing glass ionomer cement, zinc oxide eugenol, and epoxy resin sealers from retreated root canals / Oral Surg Oral Med Oral Pathol 73 : 60
Alapati SB / 2009 / Metallurgical characterization of a new nickel-titanium wire for rotary endodontic instruments / J Endod 35 : 1589 ~ 1593
Bier CA / 2009 / The ability of different nickel-titanium rotary instruments to induce dentinal damage during canal preparation / J Endod 35 : 236 ~ 238
Capar ID / 2014 / Effects of ProTaper Universal, ProTaper Next, and HyFlex instruments on crack formation in dentin / J Endod 40 : 1482 ~ 1484
Friedman S / 1992 / Efficacy of removing glass ionomer cement, zinc oxide eugenol, and epoxy resin sealers from retreated root canals / Oral Surg Oral Med Oral Pathol 73 : 60
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