International Journal of Prosthodontics and Restorative Dentistry

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VOLUME 8 , ISSUE 2 ( April-June, 2018 ) > List of Articles

RESEARCH ARTICLE

Time-dependent Changes in Occlusal Status in an Implantsupported Prosthesis at the Mandibular First Molar from Prosthesis Placement to 3 Months After

Yuji Sato, Noboru Kitagawa, Mayumi Terazawa, Tokiko Osawa, Yoshiki Imamura

Keywords : BiteEye, Clenching strength, Cohort study, Implant, Occlusal contact area, Occlusal load, Occluzer, Time-dependent change.

Citation Information : Sato Y, Kitagawa N, Terazawa M, Osawa T, Imamura Y. Time-dependent Changes in Occlusal Status in an Implantsupported Prosthesis at the Mandibular First Molar from Prosthesis Placement to 3 Months After. Int J Prosthodont Restor Dent 2018; 8 (2):44-53.

DOI: 10.5005/ijoprd-8-2-44

License: CC BY-SA 4.0

Published Online: 01-12-2010

Copyright Statement:  Copyright © 2018; The Author(s).


Abstract

Aim: The purpose of this study was to elucidate time-dependent changes in occlusal status over a 3-month period to understand dynamic factors that act on implant-supported prosthesis. We used pressure-sensitive film for occlusal force diagnostics and silicone testing material to measure the occlusal status of a mandibular first molar implant-supported prosthesis under controlled clenching strengths. Materials and methods: The subjects were eight patients who had an implant-supported prosthesis inserted at the mandibular first molar and did not have any missing teeth other than the implants. We performed the following tests immediately and 3 months after fitting the prosthesis. First, we monitored masseter muscle activity and defined maximum clenching strength as 100% maximum voluntary contraction (MVC). We then used pressure-sensitive film and a clenching strength measuring device to measure occlusal load and occlusal contact area at clenching strengths of 40, 60, 80, and 100% MVC. Finally, we used silicone testing material and an occlusal contact measurement device to measure occlusal contact area at clenching strengths of 20, 40, and 60% MVC. Results: Occlusal load and occlusal contact area of the bilateral molar region increased at all clenching strengths 3 months after fitting the prosthesis. However, the quotient of bilateral molar occlusal contact area divided by occlusal load (contact area/ load) showed no significant changes after 3 months for any of the clenching strengths. There was also no significant change observed in occlusal load of the prosthesis, occlusal contact area of the prosthesis and contact area/load significantly Conclusion: Wearing an implant-supported prosthesis for 3 months increased clenching strength, which increased the overall bilateral molar occlusal contact area and occlusal load. Our findings suggest that implant-supported prostheses increase occlusal contact area at high clenching strengths after 3 months of use. Clinical significance: This study suggested that implantsupported prosthesis which have ideal occlusal contact status need to be checked and occlusal status adjusted regularly for its prediction.


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  1. Esposito M, Hirsch JM, Lekholm U, Thomsen P. Biological factors contributing to failures of osseointegrated oral implants. (I). Success criteria and epidemiology. Eur J Oral Sci 1998 Feb;106(1):527-551.
  2. Chiapasco M. Early and immediate restoration and loading of implants in completely edentulous patients. Int Oral Maxillofac Implants 2004;19 (Suppl):76-91.
  3. Esposito M, Hirsch JM, Lekholm U, Thomsen P. Biological factors contributing to failures of osseointegrated oral implants. (II). Etiopathogenesis. Eur J Oral Sci 1998 Jun;106(3):721-764.
  4. Miura H. Occlusal function and periodontal tissue. J Stomatol Soc Jpn 2000;67(1):1-10. [in Japanese]
  5. Morikawa O. Influence of occlusal contacts of implant on adjacent teeth and antagonists displacements. J Stomatol Soc Jpn 2003 Dec;70(4):224-233. [in Japanese]
  6. Dario LJ. How occlusal forces change in implant patients: a clinical research report. J Am Dent Assoc 1995 Aug;126(8): 1130-1133.
  7. Rangert BR, Sullivan RM, Jemt TM. Load factor control for implants in the posterior partially edentulous segment. Int J Oral Maxillofac Implants 1997 May-Jun;12(3):360-370.
  8. Kim Y, OH TJ, Misch CE, Wang HL. Occlusal considerations in implant therapy: clinical guidelines with biomechanical rationale. Clin Oral Implants Res 2005 Feb;16(1):26-35.
  9. Doi N, Inoue M, Inai T, Watanabe M, Sasaki K. Occlusal force on the dental arch in patients with dental implants at the free-end edentulous area. J Jpn Soc Oral Implantol 2006;19(4):466-477.
  10. Okuyama T, Sato Y, Ozawa K, Kitagawa N, Uchida K. Occlusion of prostheses supported by an implant for a single intermediate missing posterior tooth with satisfactory prognosis. J Jpn Soc Oral Implantol 2010;23(2):209-219. [in Japanese]
  11. Imamura Y, Sato Y, Kitagawa N, Uchida K, Osawa T, Omori M, Okada Y. Influence of occlusal loading force on occlusal contacts in natural dentition. J Prosthodont Res 2015 Apr;59(2): 113-120.
  12. Smith DE, Zarb GA. Criteria for success of osseointegrated endosseous implants. J Prosthet Dent 1989 Nov;62(5):567-572.
  13. Albrektsson T, Zarb GA. Current interpretations of the osseointegrated response: clinical significance. Int J Prosthodont 1993 Mar-Apr;6(2):95-105.
  14. Sakaguchi N, Kawano S. Opposing teeth of implants observed over long-term and in statistic data. Shikai Tenbou 2013;121(2):270-280. [in Japanese]
  15. Ren S, Lin Y, Hu X, Wang Y. Changes in proximal contact tightness between fixed implant prostheses and adjacent teeth: a 1-year prospective study. J Prosthet Dent 2016 Apr;115(4):437-440.
  16. Tanaka M, Johnston LE. The prediction of the size of unerupted canines and premolars in a contemporary orthodontic population. J Am Dent Assoc 1974 Apr;88(4):798-801.
  17. Hidaka O, Iwasaki M, Saito M, Morimoto T. Influence of clenching intensity on bite force balance, occlusal contact area, and average bite pressure. J Dent Res 1999 Jul;78(7):1336-1344.
  18. Kurosawa M. Studies on human biting force gender differences and lateral dominance with development and growth. J Jpn Acad Occlusion Health 2002;8:8-16. [in Japanese]
  19. Maezawa N, Wakabayashi N, Yokoyama S, Shiota M, Suzuki T. Influence of intensity of occlusal contact in implant-retained single restoration on stress distributions of crown surface and supporting bone. J Jpn Prosthodont Soc 2007 Jul;51(3):582-591. [in Japanese]
  20. Yamaguchi T, Hisatsune Y, Kimura T, Komatsu K, Uchiyama Y. Examination of occlusal contacts by using Dental Prescale: special reference to the rate of detected occlusal contacts in the intercuspal position. J Prosthodont Res 1995;39(6):1113-1120. [in Japanese]
  21. Suzuki T, Kumagai H, Yoshitomi N, Minakuchi S, Watanabe T, Uchida T, Ishinabe S, Sekita T, Kobayashi K, Kobayashi K, et al. Clinical evaluation of measuring system of occlusal force. J Stomatol Soc Jpn 1994 Sep;61(3):437-445. [in Japanese]
  22. Kondo H, Ozawa S, Sawase T, Yokoyama A, Sekine H, Maida T, Ayukawa Y, Nakano T, Kubo T, Hosokawa R, et al. Occlusal consideration for fixed implant prosthesis in mandibular posterior region. Ann J Prosthodont Soc 2016;8(1):1-9. [in Japanese]
  23. Daizo O. Teeth displacements and occlusal contacts depending on clenching force. J Jpn Prosthodont Soc 1998;42(6): 1013-1023.
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