Molar cusp deformation evaluated by micro-CT and enamel crack formation to compare incremental and bulk-filling techniques

Conclusions Micro-CT was an effective method for evaluating the cusp deformation. Transillumination was effective for detecting enamel cracks. There were fewer negative effects of polymerization shrinkage in bulk-fill resin restorations using XTRA than for the conventional incremental filling technique using conventional composite resin Z100. Clinical significance Shrinkage and cusp deformation are directly related to the formation of enamel cracks. Cusp deformation and crack propagation may increase the risk of tooth fracture.
Source: Journal of Dentistry - Category: Dentistry Source Type: research