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Overeruption without root exposure of third molars and periodontal health in the mandible

Clinical Oral Investigations volume 9, pages 192–196 (2005)Cite this article

Abstract

Bone formation is seen around the third molar even when the tooth is exposed to the oral environment due to overeruption. To determine if overeruption of the third molar with or without root exposure is related to the status of the exposure of other teeth in the mandible, using orthopantomographs, 424 third molars were studied in 371 patients who were over 41 years of age. The rate of overeruption and root exposure in third molars was measured, and its relationship to the number of teeth lost and the rate of root exposure in other teeth in the mandible was analyzed. Tooth loss in the group of third molars with overeruption without root exposure was greater than in that without overeruption or root exposure in men, whereas the relationship was not seen in women. We found that root exposures of other teeth in the group of third molars with overeruption without root exposure were significantly smaller than in those with root exposure in both genders. Third molars with overeruption without root exposure, in which bone formation was easy to observe for radiographic diagnosis, were correlated with periodontal health in the mandible, suggesting a component of precision determination for predicting resistance to periodontitis.

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References

  1. Blieden TM (1999) Tooth-related issues. Ann Periodontol 4:91–96

    Article  CAS  PubMed  Google Scholar 

  2. Craddock HL, Youngson CC (2004) A study of the incidence of overeruption and occlusal interferences in unopposed posterior teeth. Br Dent J 196:341–348

    Article  CAS  PubMed  Google Scholar 

  3. DeVore CH, Beck FM, Horton JE (1988) Retained “hopeless” teeth. Effects on the proximal periodontium of adjacent teeth. J Periodontol 59:647–651

    CAS  PubMed  Google Scholar 

  4. Hirshfeld I (1930) Food impaction. J Am Dent Assoc 17:1504–1528

    Google Scholar 

  5. Kugelberg CF (1990) Periodontal healing two and four years after impacted lower third molar surgery. A comparative retrospective study. Int J Oral Maxillofac Surg 19:341–345

    CAS  PubMed  Google Scholar 

  6. McGuire MK (1991) Prognosis versus actual outcome: a long-term survey of 100 treated periodontal patients under maintenance care. J Periodontol 62:51–58

    CAS  PubMed  Google Scholar 

  7. Melson B (1986) Tissue reaction following application of extrusive and intrusive forces to teeth in adult monkeys. Am J Orthod 89:469–475

    Article  PubMed  Google Scholar 

  8. Miyazaki H, Hanada N, Andoh MI, Yamashita Y, Saito T, Sogame A, Goto K, Shirahama R, Takehara T (1989) Periodontal disease prevalence in different age groups in Japan as assessed according to the CPITN. Commun Dent Oral Epidemiol 17:71–74

    CAS  Google Scholar 

  9. Nunn ME, Harrel SK (2001) The effect of occlusal discrepancies on periodontitis. I. Relationship of initial occlusal discrepancies to initial clinical parameters. J Periodontol 72:485–494

    Article  CAS  PubMed  Google Scholar 

  10. Polsen A, Caton J, Polsen AP, Nyman S, Novak J, Reed B (1984) Periodontal response after tooth movement into intrabony defects. J Periodontol 55:197–202

    PubMed  Google Scholar 

  11. Slemenda CW, Longcope C, Zhou L, Hui SL, Peacock M, Johnston CC (1997) Sex steroids and bone mass in older men. Positive associations with serum estrogens and negative associations with androgens. J Clin Invest 100:1755–1759

    CAS  PubMed  Google Scholar 

  12. Vardimon AD, Nemcovsky CE, Dre E (2001) Orthodontic tooth movement enhances bone healing of surgical bony defects in rats. J Periodontol 72:858–864

    Article  CAS  PubMed  Google Scholar 

Download references

Acknowledgements

This work was performed in part by consignment for the Creation and Support Program for Start-ups from Universities from the Japan Science and Technology Agency. We would like to thank Ms. Hitomi Koike for her contribution to this study.

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Affiliations

  1. Department of Oral and Maxillofacial Surgery, Matsumoto Dental University School of Dentistry, Shiojiri, Nagano, 399-0781, Japan

    M. Yamaoka, M. Hashimoto, M. Sugiura, T. Matsuura, T. Uematsu & K. Furusawa

  2. Fuji Rebio Inc., Frontier Research Division, Hachiouji, Tokyo, Japan

    T. Shiba

  3. Regenetiss Co. Ltd., Okaya, Nagano, Japan

    T. Shiba

Authors
  1. M. Yamaoka
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  2. M. Hashimoto
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  3. M. Sugiura
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  4. T. Matsuura
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  5. T. Shiba
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  6. T. Uematsu
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  7. K. Furusawa
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Correspondence to M. Yamaoka.

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Yamaoka, M., Hashimoto, M., Sugiura, M. et al. Overeruption without root exposure of third molars and periodontal health in the mandible. Clin Oral Invest 9, 192–196 (2005). https://doi.org/10.1007/s00784-005-0314-7

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  • DOI: https://doi.org/10.1007/s00784-005-0314-7

Keywords

  • Third molar
  • Root exposure
  • Mandible
  • Periodontium