The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지

INFLUENCE OF VARIOUS PROPERTIES OF POST AND CORE ON THE STRESS DISTRIBUTION IN ENDODONTICALLY TREATED TOOTH

다양한 포스트와 코어의 물성이 근관치료된 치근의 응력분산에 미치는 영향

  • Cho Jin-Hyun (Department of Prosthodontics, School of Dentistry, Kyungpook National University) ;
  • Lee Cheong-Hee (Department of Prosthodontics, School of Dentistry, Kyungpook National University)
  • 조진현 (경북대학교 치과대학 보철학교실) ;
  • 이청희 (경북대학교 치과대학 보철학교실)
  • Published : 2006.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

Statement of problem : The various kinds of properties of post and core may affect the stress distribution to the root of endodontically treated teeth Purpose: To evaluate the influence of various kinds of properties of post and core to the stress distribution to the root of endodontically treated teeth. Material and methods: Mandibular first premolar, prepared by general shape of post and core with gold crown, was used to two dimensional axisymmetric modeling for finite element analysis. Then property values of 8 different kinds of post and core was substituted for each. Finally, stress distribution shown areas around the root of post and core was analysed after applying 50N of vortical and oblique load. Results: 1. Stress value of oblique load was much higher than the maximum stress value of vertical load. 2. Under oblique load, very concentrated stress was located on post periapical area and variations in stress were very severe. Contrary to this, stress distribution was relatively uniform in vertical load. 3. Post materials with higher elastic modulus showed relatively more apically focused stress, and post materials with lower elastic modulus showed stress focused on cervical area on the axial wall of post. 4. Stress change according to the properties of core was shown only in the cervical area of post and below core as the higher elastic modulus, then increased in stress. 5. Post and core with medium value of elastic modulus showed relatively uniform stress distribution. Conclusions: Post materials with higher elastic modulus showed relatively more apically focused stress, and post materials with lower elastic modulus showed stress focused on cervical area on the axial wall of post. Stress change according to the properties of core was shown only in the cervical area of post and below core.

Keywords

References

  1. Henry PJ, Bower RC. Post core system in crown and bridgework. Aust Dent J 1977:22:46-52 https://doi.org/10.1111/j.1834-7819.1977.tb04443.x
  2. Assif D. Restoration of endodontically treated teeth. A discussion out of reviews. 1979:28:15-9, 13-16
  3. Davy DT, Dilley GL, Krekci RF. Determination of stress patterns in root-filled teeth incorporating varous dowel designs. J Dent Res 1981:60: 1301-1310 https://doi.org/10.1177/00220345810600070301
  4. Travert KC, Caput AA, Abourass M. Tooth fracture - a comparison of endodontic and restorative treatments. J Endod 1978:4:341-345 https://doi.org/10.1016/S0099-2399(78)80232-5
  5. Kantor ME, Pines MS. A comparative study of restorative techniques for pulpless teeth. J Prosthet Dent 1977:38:405-412 https://doi.org/10.1016/0022-3913(77)90094-4
  6. Sorensen JA Martinoff JT. Intracoronal reinforcement and coronal coverage: a study of endodontically treated teeth. J Prosthet Dent 1984:51 :780-784 https://doi.org/10.1016/0022-3913(84)90376-7
  7. Assif D. Bitenski A, Pilo R. Oren E. Effect of post design on resistance to fracture of endodontically treated teeth with complete crowns. J Prosthet Dent 1993 :69:36-40 https://doi.org/10.1016/0022-3913(93)90237-I
  8. Cailleteau JG, Rieger MR, Akin JE. A comparison of intracanal stresses in post-restored tooth utilizing the finite element method. J Endod 1992:18:540-544 https://doi.org/10.1016/S0099-2399(06)81210-0
  9. Lee B. Handbook of finite element method. Donghwa Tech. 1989. pp. 1-22,411-414
  10. Im S. Introduction of finite element method. Dongmyung Co. 1996, pp. 3-4
  11. NISA II/DISPLAY III User's Manuel. Engineering Mechanics Research Corporation(EMRC)
  12. Wheeler RC. Dental anatomy. physiology and occlusion. W.B. Saunders Co., 5th ed., 1974. pp.216-236
  13. Mezzomo E, Massa F, Libera SD. Fracture resistance of teeth restored with two different post-and-core designs cemented with two different cements: an in vitro study. Part I. Quintessence Int 2003: 34:301-306
  14. Atmaram GH, Mohammed H. Estimation of physiologic stresses with a natural tooth considering fibrous PDL structure. J Dent Res 1981:60:873-877 https://doi.org/10.1177/00220345810600050301
  15. Chamay A, Tschantz P. Mechanical influences in bone remodelling Experimental research on Wolff's law. J Biomech 1972: 5173-180
  16. Kim J. Jo K. Lee C. A study of the stress distribution on the second abutment and supporting tissues in fixed partial denture using three dimensional finite element analysis method. MS thesis. Department of Dentistry, Kyungpook Nat. Univ., 2000
  17. Papavasiliou G, Kamposiora P. Bayne SC. Three-dimensional finite element analysis of stress-distribution around single tooth implants as a function of bony support. prosthesis type, and loading during function. J Prosthet Dent 1996:67:633-640
  18. Isidor F, Odman P. Brondum K. Intermittent loading of teeth restored using prefabricated carbon fiber posts. Int J Prosthodont 1996:9:131-136
  19. Castro JC. Poi WR, Manfrin TM. Zina LG. Analysis of the crown fractures and crownroot fractures due to dental trauma assisted by the Integrated Clinic from 1992 to 2002. Dent Traumatol 2005: 21: 121-126 https://doi.org/10.1111/j.1600-9657.2005.00276.x
  20. Fokkinga WA, Kreulen CM. Vallittu PK. Creugers NH. A structured analysis of in vitro failure loads and failure modes of fiber, metal, and ceramic post-and-core systems. Int J Prosthodont 2004:17:476-482
  21. Ellner S. Bergendal T, Bergman B. Four post-and-core combinations as abutments for fixed single crowns: a prospective up to 10-year study. Int J Prosthodont 2003: 16:249-254