FINITE ELEMENT ANALYSIS OF MAXILLARY CENTRAL INCISORS RESTORED WITH VARIOUS POST-AND-CORE APPLICATIONS
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초록
The purpose of this study was to investigate the effect of rigidity of post core systems on stress distribution by the theoretical technique, finite element stress-analysis method. Three-dimensional finite element models simulating an endodontically treated maxillary central incisor restored with a zirconia ceramic crown were prepared and 1.5 mm ferrule height was provided. Each model contained cortical bone, trabecular bone, periodontal ligament, 4 mm apical root canal filling, and post-and-core. Six combinations of three parallel type post (zirconia ceramic, glass fiber, and stainless steel) and two core (Paracore and Tetric ceram) materials were evaluated, respectively. A 50 N static occlusal load was applied to the palatal surface of the crown with a 60angle to the long axis of the tooth. The differences in stress transfer characteristics of the models were analyzed. von Mises stresses were chosen for presentation of results and maximum displacement and hydrostatic pressure were also calculated. An increase of the elastic modulus of the post material increased the stress, but shifted the maximum stress location from the dentin surface to the post material. Buccal side of cervical region (junction of core and crown) of the glass fiber post restored tooth was subjected to the highest stress concentration. Maximum von Mises stress in the remaining radicular tooth structure for low elastic modulus resin core (29.21 MPa) was slightly higher than that for high elastic modulus resin core (29.14 MPa) in case of glass fiber post. Maximum displacement of glass fiber post restored tooth was higher than that of zirconia ceramic or stainless steel post restored tooth.
Abstract
The purpose of this study was to investigate the effect of rigidity of post core systems on stress distribution by the theoretical technique, finite element stress-analysis method. Three-dimensional finite element models simulating an endodontically treated maxillary central incisor restored with a zirconia ceramic crown were prepared and 1.5 mm ferrule height was provided. Each model contained cortical bone, trabecular bone, periodontal ligament, 4 mm apical root canal filling, and post-and-core. Six combinations of three parallel type post (zirconia ceramic, glass fiber, and stainless steel) and two core (Paracore and Tetric ceram) materials were evaluated, respectively. A 50 N static occlusal load was applied to the palatal surface of the crown with a 60angle to the long axis of the tooth. The differences in stress transfer characteristics of the models were analyzed. von Mises stresses were chosen for presentation of results and maximum displacement and hydrostatic pressure were also calculated. An increase of the elastic modulus of the post material increased the stress, but shifted the maximum stress location from the dentin surface to the post material. Buccal side of cervical region (junction of core and crown) of the glass fiber post restored tooth was subjected to the highest stress concentration. Maximum von Mises stress in the remaining radicular tooth structure for low elastic modulus resin core (29.21 MPa) was slightly higher than that for high elastic modulus resin core (29.14 MPa) in case of glass fiber post. Maximum displacement of glass fiber post restored tooth was higher than that of zirconia ceramic or stainless steel post restored tooth.
참고문헌 (30)
- Albuquerque RC, "Stress analysis of an upper central incisor restored with different posts", J Oral Rehabil, 30, pp.936~943 (2003)
- Hunter AJ, "Effects of post placement on endodontically treated teeth", J Prosthet Dent, 62, pp.166~172 (1989)
- Ottl P, "Fracture characteristics of carbon fiber, ceramic and non-palladium endodontic post systems at monotonously increasing loads", J Oral Rehabil, 29, pp.175~182 (2002)
- Ko CC, "Effects of posts on dentin stress distribution in pulpless teeth", J Prosthet Dent, 68, pp.421~427 (1992)
- Assif D, "Biomechanical considerations in restoring endodontically treated teeth", J Prosthet Dent, 71, pp.565~567 (1994)
- Caputo AA, "Biomechanics in Clinical Dentistry", pp.185~203 (1987), Chicago Quinte ssence Publishing Co, Inc
- Rosnetritt M, "Comparison of in vitro fracture strength of metallic and tooth-coloured posts and cores", J Oral Rehabil, 27, pp.595~601 (2000)
- Yaman SD, "Analysis of stress distribution in a maxillary central incisor subjected to various post and core applications", J Endod, 24, pp.107~111 (1998)
- Holmes DC, "Influence of post dimension on stress distribution in dentin", J Prosthet Dent, 75, pp.140~147 (1996)
- Pegoretti A, "Finite element analysis of a glass fibre reinforced composite endodontic post", Biomaterials, 23, pp.2667~2682 (2002)
- Eskitascioglu G, "Evaluation of two post core systems using two different methods (fracture strength test and a finite elemental stress analysis)", J Endod, 28, pp.629~633 (2002)
- Boschian PL, "Stress distribution in a post-restored tooth using the three-dimensional finite element method", J Oral Rehabil, 33, pp.690~697 (2006)
- Manning KE, "Factors to consider for predictable post and core build-ups of endodontically treated teeth. Part Ⅱ: clinical application of basic concepts", J Canad Dent Assoc, 61, pp.696~707 (1995)
- Sorrentino R, "Three-dimensional finite element analysis of stress and strain distributions in post-and-core treated maxillary central incisors", J Adhes Dent, 9, pp.527~536 (2007)
- Sorrentino R, "Three-dimensional finite element analysis of strain and stress distributions in endodontically treated maxillary central incisors restored with different post, core and crown materials", Dent Mater, 23, pp.983~993 (2007)
- Pierrisnard L, "Corono-radicular reconstruction of pulpless teeth: a mechanical study using finite element analysis", J Prosthet Dent, 88, pp.442~448 (2002)
- Asmussen E, "Finite element analysis of stresses in endodontically treated, dowelrestored teeth", J Prosthet Dent, 94, pp.321~329 (2005)
- Eskitascioglu G, "The influence of occlusal loading location on stresses transferred to implant- supported prostheses and supporting bone: A three-dimensional finite element study", J Prosthet Dent, 91, pp.144~150 (2004)
- 박정길, "탄성계수가 다른 복합레진의 혼합수복이 5급 수복물의 응력분포에 미치는 영향에 관한 3차원 유한요소법적 연구", 대한치과보존학회지, 33(3), pp.184~197 (2008), 대한치과보존학회
- 박찬석, "교합력이 치경부 복합레진 수복물의 응력분포에 미치는 영향에 관한 3차원 유한요소법적 연구", 대한치과보존학회지, 33(3), pp.246~257 (2008), 대한치과보존학회
- Sorensen JA, "Ferrule design and fracture resistance of endodontically treated teeth", J Prosthet Dent, 63, pp.529~536 (1990)
- Ausiello P, "Fracture resistance of endodontically treated premolars adhesively restored", Am J Dent, 10, pp.237~241 (1997)
- Sahafi A, "Resistance to cyclic loading of teeth restored with posts", Clin Oral Investig, 9, pp.84~90 (2005)
- Eraslan O, "Finite element analysis of the effect of ferrule height on stress distribution at post-and-core restored all-ceramic anterior crowns", Clin Oral Invest, 12 (2008)
- Ho MH, "Three-dimensional finite element analysis of the effects of posts on stress distribution in dentin", J Prosthet Dent, 72, pp.367~372 (1994)
- Mannocci F, "Intermittent loading of teeth restored using quartz fiber, carbon-quartz fiber, and zirconium dioxide ceramic root canal posts", J Adhes Dent, 1, pp.153~158 (1999)
- Asmussen E, "Stiffness, elastic limit, and strength of newer types of endodontic posts", J Dent, 27, pp.275~278 (1999)
- Toksavul S, "Analysis of dentinal stress distribution of maxillary central incisors subjected to various postand- core applications", Oper Dent, 31, pp.89~96 (2006)
- 박정길, "5급 복합레진수복물의 응력분포에 관한 3차원 유한요소법적 연구", 대한치과보존학회지, 33(1), pp.28~38 (2008), 대한치과보존학회
- Barjau-Escribano A, "Influence of prefabricated post material on restored teeth: fracture strength and stress distribution", Oper Dent, 31, pp.47~54 (2006)