Clinical study on prognostic factors for autotransplantation of teeth with complete root formation

Sugai, T.; Yoshizawa, M.; Kobayashi, T.; Ono, K.; Takagi, R.; Kitamura, N.; Okiji, T.; Saito, C.

doi:10.1016/j.ijom.2010.06.018

« Previous Next »International Journal of Oral & Maxillofacial Surgery
Volume 39, Issue 12 , Pages 1193-1203, December 2010

Clinical study on prognostic factors for autotransplantation of teeth with complete root formation

T. Sugai
- Division of Reconstructive Surgery for Oral and Maxillofacial Region, Department of Tissue Regeneration and Reconstruction, Course for Oral Life Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
M. Yoshizawa
- Division of Reconstructive Surgery for Oral and Maxillofacial Region, Department of Tissue Regeneration and Reconstruction, Course for Oral Life Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
- Address: Michiko Yoshizawa, Division of Reconstructive Surgery for Oral and Maxillofacial Region, Department of Tissue Regeneration and Reconstruction, Course for Oral Life Science, Niigata University Graduate School of Medical and Dental Sciences, 2-5274 Gakkocho-Dori, Chuo-ku, Niigata 951-8514, Japan. Tel.: +81 25 227 2878; fax: +81 25 223 6516.
T. Kobayashi
- Division of Reconstructive Surgery for Oral and Maxillofacial Region, Department of Tissue Regeneration and Reconstruction, Course for Oral Life Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
K. Ono
- Division of Dental Hygiene and Health Promotion, Department of Health and Welfare, Niigata University Faculty of Dentistry, Niigata, Japan
R. Takagi
- Division of Oral and Maxillofacial Surgery, Department of Oral Health Science, Course for Oral Life Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
N. Kitamura
- Division of Information Science and Biostatistics Department of Informatics and Pharmaceutics, Course for Community Disease Control, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
T. Okiji
- Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Course for Oral Life Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
C. Saito
- Division of Reconstructive Surgery for Oral and Maxillofacial Region, Department of Tissue Regeneration and Reconstruction, Course for Oral Life Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan

Accepted 14 June 2010. published online 14 July 2010.

Abstract

Autotransplantation is often performed to replace a missing tooth, but tooth autotransplantation has been reported in fewer teeth with complete root formation than those with incomplete root formation. The aim of this prospective study was to evaluate the factors that affect the prognosis of autotransplantation of teeth with complete root formation. 109 patients with 117 transplants were studied. Of the 117 transplants investigated, 14 (12%) failed during the observation period. The overall 1-year survival rate was 96%; the 5-year survival rate was 84%. The major causes of failure were unsuccessful initial healing and replacement root resorption with periodontal inflammation. Factors significantly associated with unsuccessful transplantation, in single factor analysis, were age 40 years or more, molar tooth as donor, probing pocket depth to 4mm or more, history of root canal treatment, multi-rooted teeth and fixation with sutures. Pocket depth of 4mm or more and history of root canal treatment appeared to increase the risk of unsuccessful transplantation in multivariate analysis. It is suggested that the pocket depth of the donor tooth and history of root canal treatment are related to the healing of paratransplantal tissue and root resorption.