미성숙 치아 모델에서 포스트의 종류와 크기가 치아의 파절 저항성에 미치는 영향에 관한 연구
INFLUENCE OF POST TYPES AND SIZES ON FRACTURE RESISTANCE IN THE IMMATURE TOOTH MODEL
0
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
본 연구의 목적은 미성숙 우치를 가타퍼챠 및 다양한 포스트와 코아 시스템을 이용하여 수복한 후 술식에 따른 파절 강도를측정하였다. 우치의 백악상아경계 상방 8 mm, 하방 12 mm 지점을 절단하여 제작한 미성숙 우치 모델에서 가타퍼챠와 이원중합형 복합레진 LuxaCore로 코어 수복을 시행하거나, 각각 D.T. LIGHT-POST, ParaPost XT 및 다양한 크기의EverStick Post와 LuxaCore로 수복하였다. 이후 시편을 72시간 동안 증류수에 저장한 후 6,000회의 thermocycling을 진행하였다. 실험적으로 치주인대의 물성을 재현하고, Instron에 시편을 45도로 위치시켜 압축부하를 가해 파절 강도를 측정하고,파절 부위를 분석하였다. 실험 결과, 포스트를 이용하여 수복하였을 때 파절 강도가 통계적으로 유의하게 증가하였고(p < 0.05), 포스트의 종류 및 적합도는 결과에 통계적으로 유의한 차이를 나타내지 않았다. 대부분의 시편에서 수복 가능한 파절이 나타났으며, 실험군에 따른파절 부위의 유의한 차이는 나타나지 않았다. 이상의 결과로 볼 때 미성숙 치아의 상기 치근 강화 술식은 치아의 파절 강도를 증가시키고, 포스트의 종류 및 적합도는 파절저항성에 거의 영향을 미치지 않는 것으로 나타났다
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 postand-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. [J Kor Acad Cons Dent 35(4):257-266, 2010]
참고문헌 (35)
- Takuma S, "Preliminary report on the mineralization of human dentin", J Dent Res, 39, pp.964~972 (1960)
- Doyon GE, "Fracture resistance of human root dentin exposed to intracanal calcium hydroxide", J Endod, 31(12), pp.895~897 (2005)
- Cvek M, "Prognosis of luxated non-vital maxillary incisors treated with calcium hydroxide and filled with gutta-percha. A retrospective clinical study", Endod Dent Traumatol, 8(2), pp.45~55 (1992)
- Goncalves LA, "Fracture resistance of weakened roots restored with a transilluminating post and adhesive restorative materials", J Prosthet Dent, 96(5), pp.339~344 (2006)
- Carvalho CA, "Structural resistance in immature teeth using root reinforcements in vitro", Dent Traumatol, 21(3), pp.155~159 (2005)
- Bortoluzzi EA, "Fracture strength of bovine incisors after intra-radicular treatment with MTA in an experimental immature tooth model", Int Endod J, 40(9), pp.684~691 (2007)
- Bramante CM, "Use of MTA and intracanal post reinforcement in a horizontally fractured tooth: a case report", Dent Traumatol, 22(5), pp.275~278 (2006)
- Tay FR, "Monoblocks in root canals: a hypothetical or a tangible goal", J Endod, 33(4), pp.391~398 (2007)
- Radovic I, "Light transmission through fiber post: The effect on adhesion, elastic modulus and hardness of dual-cure resin cement", Dent Mater (2009)
- D'Arcangelo C, "The effect of resin cement film thickness on the pullout strength of a fiber-reinforced post system", J Prosthet Dent, 98(3), pp.193~198 (2007)
- Yoldas O, "An experimental analysis of stresses in simulated flared root canals subjected to various post-core applications", J Oral Rehabil, 32(6), pp.427~432 (2005)
- 김진우, "레진 시멘트를 이용한 레진 파이버 강화 레진포스트의치근 상아질에 대한 미세인장결합강도", 대한치과보존학회지, 28(1), pp.80~88 (2003), 대한치과보존학회
- Schmage P, "Effect of surface treatment of titanium posts on the tensile bond strength", Dent Mater, 22(2), pp.189~194 (2006)
- Krejci I, "In-vitro test results of the evaluation of dental restoration systems. Correlation with in-vivo results", Schweiz Monatsschr Zahnmed, 100(12), pp.1445~1449 (1990)
- Soares CJ, "Influence of root embedment material and periodontal ligament simulation on fracture resistance tests", Braz Oral Res, 19(1), pp.11~16 (2005)
- Moosavi H, "Fracture resistance of endodontically-treated teeth restored using three root-reinforcement methods", J Contemp Dent Pract, 9(1), pp.30~37 (2008)
- Naumann M, "Reinforcement effect of adhesively luted fiber reinforced composite versus titanium posts", Dent Mater, 23(2), pp.138~144 (2007)
- Brown WS, "Thermal fatigue in teeth", J Dent Res, 51(2), pp.461~467 (1972)
- Sano H, "Tensile properties of mineralized and demineralized human and bovine dentin", J Dent Res, 73(6), pp.1205~1211 (1994)
- Valois CR, "Influence of the thickness of mineral trioxide aggregate on sealing ability of rootend fillings in vitro", Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 97(1), pp.108~111 (2004)
- Hachmeister DR, "The sealing ability and retention characteristics of mineral trioxide aggregate in a model of apexification", J Endod, 28(5), pp.386~390 (2002)
- Coneglian PZ, "In vitro sealing ability of white and gray mineral trioxide aggregate (MTA) and white Portland cement used as apical plugs", J Appl Oral Sci, 15(3), pp.181~185 (2007)
- 서민석, "FINITE ELEMENT ANALYSIS OF MAXILLARY CENTRAL INCISORS RESTORED WITH VARIOUS POST-AND-CORE APPLICATIONS", 대한치과보존학회지, 34(4), pp.324~332 (2009), 대한치과보존학회
- 임동열, "STRESS DISTRIBUTION OF ENDODONTICALLY TREATED MAXILLARY SECOND PREMOLARS RESTORED WITH DIFFERENT METHODS: THREE-DIMENSIONAL FINITE ELEMENT ANALYSIS", 대한치과보존학회지, 34(1), pp.69~79 (2009), 대한치과보존학회
- P. Beck TG, "Evaluation of Flexural Strength and Elastic Modulus of Endodontic Posts", ~ (2009)
- Al-Omiri MK, "An ex vivo study of the effects of retained coronal dentine on the strength of teeth restored with composite core and different post and core systems", Int Endod J, 39(11), pp.890~899 (2006)
- Abdul Salam SN, "Cyclic loading of endodontically treated teeth restored with glass fibre and titanium alloy posts: fracture resistance and failure modes", Eur J Prosthodont Restor Dent, 14(3), pp.98~104 (2006)
- Mitsui FH, "In vitro study of fracture resistance of bovine roots using different intraradicular post systems", Quintessence Int, 35(8), pp.612~616 (2004)
- Akkayan B, "Resistance to fracture of endodontically treated teeth restored with different post systems", J Prosthet Dent, 87(4), pp.431~437 (2002)
- Lassila LV, "Vallittu PK. Flexural properties of fiber reinforced root canal posts", Dent Mater, 20(1), pp.29~36 (2004)
- Mannocci F, "Penetration of bonding resins into fibre-reinforced composite posts: a confocal microscopic study", Int Endod J, 38(1), pp.46~51 (2005)
- Abo El-Ela OA, "Microtensile Bond Strength of Nonmetallic Dowels Bonded to Radicular Dentin with Self-Etch Adhesives", J Prosthodont (2008)
- Hagge MS, "Effect of dowel space preparation and composite cement thickness on retention of a prefabricated dowel", J Prosthodont, 11(1), pp.19~24 (2002)
- Pereira JR, "Effect of a crown ferrule on the fracture resistance of endodontically treated teeth restored with prefabricated posts", J Prosthet Dent, 95(1), pp.50~54 (2006)
- Isidor F, "The influence of post length and crown ferrule length on the resistance to cyclic loading of bovine teeth with prefabricated titanium posts", Int J Prosthodont, 12(1), pp.78~82 (1999)