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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한치과보철학회 The Journal of Advanced of Prosthodontics The Journal of Advanced of Prosthodontics 제8권 제6호
- 발행연도
- 2016.1
- 수록면
- 489 - 493 (5page)
이용수
초록· 키워드
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PURPOSE. This in-vitro study aimed to evaluate the fracture resistances and failure modes of endodontically treated mandibular premolars restored with endocrowns and conventional post-core retained crowns.
MATERIALS AND METHODS. Thirty mandibular premolars were assigned into three groups (n=10): GI, intact teeth; GE, teeth with endocrowns; GC, teeth with conventional post-core supported crowns. Except for the teeth in group GI, all specimens were cut to 1.5 mm above the cementoenamel junction and endodontically treated. Both endocrowns and conventional crowns were fabricated from lithium-disilicate blocks using a CEREC 3D CAD/CAM unit. All specimens were subjected to thermocycling and then to 45° oblique compressive load until fracture occurred. The fracture resistance and failure mode of each specimen were recorded. Data were analyzed with one-way ANOVA and LSD Post Hoc Test (α=.05).
RESULTS. The fracture resistances of GE and GC were significantly lower than that of GI (P<.01), while no significant difference was found between GE and GC (P=.702). As of the failure mode, most of the specimens in GE and GC were unfavorable while a higher occurrence of favorable failure mode was presented in GI.
CONCLUSION. For the restoration of mandibular premolar, endocrown shows no advantage in fracture resistance when compared with the conventional method. Both of the two methods cannot rehabilitate endodontically treated teeth with the same fracture resistances that intact mandibular premolars have.
목차
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참고문헌 (22)
참고문헌 신청
Reeh ES / 1989 / Reduction in tooth stiffness as a result of endodontic and restorative procedures / J Endod 15:512~516
Huang TJ / 1992 / Effects of moisture content and endodontic treatment on some mechanical properties of human dentin / J Endod 18:209~215
Linn J / 1994 / Effect of restorative procedures on the strength of endodontically treated molars / J Endod 20:479~485
Assif D / 1994 / Biomechanical considerations in restoring endodontically treated teeth / J Prosthet Dent 71:565~567
Soares PV / 2008 / Influence of restorative technique on the biomechanical behavior of endodontically treated maxillary premolars. Part I: fracture resistance and fracture mode / J Prosthet Dent 99:30~37
Huang TJ / 1992 / Effects of moisture content and endodontic treatment on some mechanical properties of human dentin / J Endod 18:209~215
Linn J / 1994 / Effect of restorative procedures on the strength of endodontically treated molars / J Endod 20:479~485
Assif D / 1994 / Biomechanical considerations in restoring endodontically treated teeth / J Prosthet Dent 71:565~567
Soares PV / 2008 / Influence of restorative technique on the biomechanical behavior of endodontically treated maxillary premolars. Part I: fracture resistance and fracture mode / J Prosthet Dent 99:30~37
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