The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지

EFFECTS OF ABUTMENT SPLINTING ON STRESS DISTRIBUTION IN UNILATERAL DISTAL EXTENSION RPD

지대치 연결고정에 따른 편측성 후방연장 국소의치에서의 응력분포

  • Ahn Hee-Young (Department of Prosthodontics, School of Dentistry, Wonkwang University) ;
  • Jin Tai-Ho (Department of Prosthodontics, School of Dentistry, Wonkwang University)
  • 안희영 (원광대학교 치과대학 치과보철학교실) ;
  • 진태호 (원광대학교 치과대학 치과보철학교실)
  • Published : 2004.04.01
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Abstract

Statement of problem: In distal extension removable partial denture, the preservation of health of abutment teeth are very important, but they are always subjected to unfavorable stress. Purpose: The purpose of this study was performed to investigate the effects of abutment splinting and design of direct retainer on the stress distribution of abutments in unilateral distal extension removable partial dentures. Material and method: Abutments were splinted by different method. In group 1, autment teeth were not splinted, in group 2, canine and 1st premolar were splinted, and in group 3, canine, 1st and 2nd premolars were all splinted. Three different types of direct retainer such as Akers clasp, RPI clasp, and wrought wire clasp were designed. Strain was measured with Switch & Balance Unit(SB-10, Measurement Group Instruments Division, Raleigh USA) and Strain Indicator(P-3500, Measurement Group Instruments Division, Raleigh, USA) 15kg of vertical and oblique loads was applied at central fossa of missing 2nd molar area. Results : The strain on lingual side of 2nd premolar was the greatest, and abutment splinting induced decrease of strain on buccolingual side of 2nd premolar. The strain of loaded area was decreased by abutment splinting and there was no statistical difference of strain between Group2 and Group 3, and strain on 2nd premolar in wrought wire clasp was the least. Conclusion: Within the limitations of this study, splinting of two distal abutment teeth is enough for stress distribution widely, and wrought wire clasp was more benefitable than others.

Keywords

References

  1. Ben-Ur Z. Gorfil C. Shifman A. Designing clasps for the asymmetric distal extension removable partial denture. Int J Prosthodont 1996:9:374-78
  2. Pezzoli M. Appendino P. Calcagno L. Celasco M. Midica R. Load transmission evaluation by removable distal-extension partial dentures using holographic interferometry. J Dent 1993:21:312-6
  3. Morikawa M. Masumi S. Kido H, Toyoda S. Kozono Y. Chou TM. Analysis of abutment tooth movement utilizing mandibular kinesiography (MKG). Part 2. Effects of clasp design in unilateral free-end denture. Dent Mater J 1989:8:56-64
  4. Kotowicz WE. Fisher RL. Reed RA. Jaslow C. The combination clasp and the distal extension removable partial denture. Dent Clin North Am 1973:17:651-60
  5. Holmes JB. Influence of impression procedures and occlusal loading on partial denture movement. J Prosthet Dent 2001: 86:335-41
  6. Levin B. Stressbreakers: A practical ap-proach. Dent Clin North Am 1979:23:7786
  7. Bickley RW. Combined splint-stress breaker removable partial denture. J Prosthet Dent 1969:21:509-12. https://doi.org/10.1016/0022-3913(69)90072-9
  8. Igarashi Y. Ogata A. Kuroiwa A. Wang CH. Stress distribution and abutment tooth mobility of distal-extenion removable partial dentures with different retainers: an in vivo study. Journal of Oral Rehabilitation 1999 :26: 111-6
  9. Linke BA. Nicholls JI. Faucher RR. Distortion analysis of stone casts made from impression materials. J Prosthet Dent 1985:54:794-802
  10. Wang HY. Lu YC, Shiau YY. Tsou D. Vertical distortion in distal extention ridges and palatal area of casts made by different techniques. J Prosthet Dent 1996:75:302-8
  11. Leupold RJ, Kratochvil FJ. An altered cast-procedure to improve tissue support for removable partial dentures. J Prosthet Dent 1965: 15:672-8
  12. Altay OT, Tsolka P, Preisket HW. Abutment teeth with extracoronal attachments: The effects of splinting on tooth movement. Int J Prosthodont 1990: 3:441-8
  13. Siegel SC, Driscoll CF, Feldman S. Tooth stabilization and splinting before and after periodontal therapy with fixed partial dentures. Dent Clin North Am 1999:43:45-76
  14. Carlsson GE, Hedegard B, Koivumaa KK. Studies in partial prosthesis N. Final result of a 4-year longitudinal investigation of dentogingivally supported partial dentures. Acta Odontal Scand 1965:23:443-69
  15. Kratochvil FJ, Thompson WD, Caputo AA. Photoelastic analysis of stress patterns on teeth and bone with attachment retainers for removable partial dentures. J Prosthet Dent 1981:46:21-8
  16. Aydinlik E, Dayangac B, Celik E. Effect of splinting on abutment tooth movement. J Prosthet Dent 1983:49:477-80
  17. Frechette A. Influence of partial denture design on distribution of forces on abutment teeth. J Prosthet Dent 1956:6: 195-212.
  18. Li M, Xiao M, Li H, Fu Q. Effects of clasp designs of Kennedy Class II RPD on the displacement of alveolar bone around the abutment tooth-an under load hologram. study. Hua Xi Kou Qiang Yi Xue Za Zhi 2001: 19:80-2
  19. Thompson WD, Kratochvil FJ, Caputo AA. Evaluation of photoelastic stress patterns produced by various designs of bilateral distal-extension removable partial dentures. J Prosthet Dent 1977: 38: 261-73
  20. Chou TM, Caputo AA, Moore DJ, Xiao B. Photoelastic analysis and comparison of force-transmission characteristics of intracoronal attachments with clasp distal-extension removable partial dentures. J Prosthet Dent 1989:62:313-9
  21. Chou TM, Eick JD, Moore DJ, Tira DE. Stereophotogrammetric analysis of abutment tooth movement in distal-extension removable partial dentures with intracoronal attachments and clasps. J Prosthet Dent 1991: 66: 343-9
  22. Steffel VL. Fundamental principles involved in partial denture design. J AmDent Assoc 1951 :42:534
  23. Berg T, Angelo A, Caputo. Load transfer by a maxillary distal-extension removable partial denture with cap and ring extracoronal attachments. J Prosthet Dent 1992:68:784-9
  24. Preiskel H, Precision retainers for free end saddle prostheses. Br Dent J 1969:127: 462-8
  25. Silness J. Periodontal conditions in patients treated with dental bridges. The relationship between the location of crown margin and preiodontal condition. J Periodontal Res 1970:5:225-9
  26. Itoh. H, Caputo. AA, Wylie. R. Berg. T. Effects of periodontal support and fixed splinting on load transfer by removable partial dentures. J Prosthet Dent 1998:79:465-71
  27. El Charkawi HG, El Wakad MT. The effect of splinting on load distribution of extracoronal attachment with distal extension prosthesis in vitro. J Prosthet Dent 1996: 76: 315-20
  28. Mizukawa K. Mega J. Swinglock removable partial denture and biting forces In partially edentulous patients. Comparison of individual biting forces with and without swinglock removable partial denture. J Nihon Univ. Sch. Dent. 1993:35:204-8
  29. Hochman N, Yaffe A, Ehrlich J. Splinting: a retrospective 17-year follow-up study. J Prosthet Dent. 1992:67:600-2
  30. Shohet H. Relative magnitudes of stress on abutment teeth with different retainers. J Prosthet Dent 1969:21:267-82
  31. Picon DCA, Manderson RD. On the biomechanics of complete and partial dentures, in Bates JF, Neill DJ, Preiskel HW (eds): Restoration of the Partially Dentate Mouth, Proceedings of the International Prosthodontic Symposium. Chicago, Quintessence Pub1Co, 1984:27-41
  32. Okazaki M. Studies on retainer's effect on unilateral designs of mandibular unilateral distal extension dentures. Nippon Hotetsu Shika Gakkai Zasshi 1990:34:40-53