‘‘Clinical and laboratory performance of glass ceramics partial veneers versus direct composite resin restorations in fractured anterior permanent teethʼʼ

Abstract

Crown fractures have been documented to account for up to 92% of all traumatic injuries to the permanent dentition. Some fractures are minor; others are severe enough to result in the untimely loss of the tooth involved. The number and extent of the tissues involved in the traumatic injury determine the management needs. Damage restricted to the dental hard tissues is simpler to deal with than that associated with the inclusion of pulpal and/or periodontal tissue trauma.

I Invitro groups: 28 freshly extracted permanent incisors were collected having sound walls. Teeth were prepared to simulate fractured class IV using CNC machine. Teeth were divided into 2 groups according to type of restoration Group D: direct composite resin restoring enamel-dentine which involve mesial and or distal coronal angle and incisal edge Group I :indirect laminate veneer restoring enamel-dentine which involve mesial and or distal coronal angle and incisal edge

Composite layering technique was used for group D and Emax glass ceramic fabricated by CAD/CAM technology was used for laminate veneer fabrication. Fracture resistance was measured using universal testing machine. Load was applied vertical on incisal edge until fracture. Data were collected and tabulated