Clinical study on prognostic factors for autotransplantation of teeth with complete root formation.
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.
Sugai
T
T
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.
Yoshizawa
M
M
Kobayashi
T
T
Ono
K
K
Takagi
R
R
Kitamura
N
N
Okiji
T
T
Saito
C
C
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D015993:Life Tables; D008297:Male; D008875:Middle Aged; D008963:Molar / Q000637:transplantation; D015999:Multivariate Analysis; D010514:Periodontal Pocket; D011379:Prognosis; D016016:Proportional Hazards Models; D011446:Prospective Studies; D012307:Risk Factors; D012390:Root Canal Therapy; D014070:Tooth / Q000637:transplantation*; D014092:Tooth Root / Q000033:anatomy & histology / Q000254:growth & development*; D017211:Treatment Failure; D055815:Young Adult