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Dentin thickness as a risk factor for vertical root fracture in endodontically treated teeth: a case-control study
Lorena Rosa Silva1, Kaique Leite de Lima1, Ananda Amaral Santos1
1Department of Stomatologic Sciences, School of Dentistry, Federal University of Goiás, Goiânia, Brazil.
Clinical Oral Investigations
|June 28, 2020
Summary
Reduced dentin thickness in endodontically treated teeth is linked to vertical root fracture (VRF). Preserving at least 1.4 mm of dentin may reduce the risk of VRF.
Area of Science:
- Endodontics
- Dental Radiology
- Biomaterials
Background:
- Vertical root fracture (VRF) is a common complication in endodontically treated teeth.
- Factors influencing VRF remain incompletely understood, necessitating further investigation.
Purpose of the Study:
- To evaluate the association between dentin thickness, intraradicular posts, adjacent implants, and missing adjacent teeth with VRF.
- To identify critical factors contributing to VRF in endodontically treated teeth.
Main Methods:
- A case-control study utilizing cone-beam computed tomography (CBCT) scans of 81 teeth with VRF and 81 matched controls.
- Analysis included dentin thickness, presence of posts, adjacent implants, and missing teeth.
- Statistical analysis involved t-tests, chi-square tests, and logistic regression.
Main Results:
- Mean dentin thickness was significantly lower in fractured teeth (1.3 mm) compared to non-fractured teeth (1.5 mm).
- Teeth with posts showed a higher prevalence of VRF.
- Dentin thickness ≤ 1.3 mm was the sole significant predictor of VRF (OR = 3.60).
Conclusions:
- Dentin thickness is a critical factor influencing the development of VRF.
- A minimum dentin thickness of 1.4 mm appears to be associated with a lower risk of VRF.
- Preserving adequate dentin thickness during endodontic treatment is crucial for long-term tooth survival.
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