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- Title
Dentin thickness as a risk factor for vertical root fracture in endodontically treated teeth: a case-control study.
- Authors
Silva, Lorena Rosa; de Lima, Kaique Leite; Santos, Ananda Amaral; Leles, Cláudio Rodrigues; Estrela, Carlos; de Freitas Silva, Brunno Santos; Yamamoto-Silva, Fernanda Paula
- Abstract
Objectives: This study evaluated factors associated with vertical root fracture in endodontically treated teeth, using a cone-beam computed tomography (CBCT) image database. Materials and methods: The sample for this case-control study consisted of 81 CBCT scans of teeth with vertical root fracture (VRF) and 81 CBCT scans of non-fractured teeth, matched by age, sex, and tooth position. The analyzed variables included dentin thickness, an intraradicular post, an adjacent implant, and a missing adjacent tooth. Student's t test test was used to compare the quantitative variables. The chi-square test was used to compare the categorical variables. Logistic regression was performed to evaluate the association between the presence of VRF and the independent factors assessed. Results: The mean dentin thickness of fractured teeth was 1.3 mm, whereas that of non-fractured ones was 1.5 mm (p < 0.001). There was no difference between the fractured and non-fractured groups, regarding implant frequency or missing adjacent tooth (p > 0.05). There were a significantly larger number of teeth with posts in the fractured versus non-fractured group (p = 0.007). However, dentin thickness ≤ 1.3 mm was the only factor associated with VRF in the multiple regression model (OR = 3.60, 95%CI = 1.76–7.37). Conclusions: Dentin thickness may influence the development of VRF. Dentin thickness ≤ 1.3 mm is associated with a greater likelihood of fracture than ≥ 1.4 mm. Clinical relevance: This study suggests there may be a minimum amount of safe dentin thickness that should be preserved after endodontic instrumentation.
- Subjects
TOOTH fractures; DENTIN; CONE beam computed tomography; TEETH; CASE-control method; TOOTH roots
- Publication
Clinical Oral Investigations, 2021, Vol 25, Issue 3, p1099
- ISSN
1432-6981
- Publication type
Article
- DOI
10.1007/s00784-020-03406-1