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Cuspal Coverage Direct Resin Composite Restorations for Cracked Teeth: A Five-Year Clinical Study.
Operative Dentistry
|June 8, 2026
Summary
Direct resin composite restorations for cracked teeth show a high survival rate, improving durability. However, endodontic treatment or periodontal lesions increase the risk of tooth loss.
Area of Science:
- Dentistry
- Restorative Dentistry
- Dental Materials
Background:
- Cracked teeth present a restorative challenge with no consensus on optimal treatment.
- Long-term clinical data on direct restorative treatments for cracked teeth are limited.
Purpose of the Study:
- To evaluate the five-year survival rate of posterior cracked teeth treated with direct resin composite restorations with cuspal coverage.
- To identify risk factors associated with tooth loss in these cases.
Main Methods:
- Retrospective evaluation of 321 patients with posterior cracked teeth treated between 1991 and 2018.
- Direct resin composite restorations with either full or partial cusp coverage were used.
- Survival analysis and logistic regression were employed to assess outcomes and risk factors.
Main Results:
- A five-year survival rate of 94.1% was observed (302/321 teeth).
- Endodontic treatment (OR: 2.67) and development of periodontal lesions (OR: 10.52) were significant risk factors for tooth loss.
- Fracture type and other tooth factors did not significantly impact survival.
Conclusions:
- Direct resin composite restorations with cuspal coverage demonstrate good long-term durability for cracked teeth.
- While effective, the need for subsequent endodontic treatment can negatively impact the long-term prognosis.
- Early intervention and management of periodontal complications are crucial for preserving cracked teeth.
