Journal article

Cuspal deflection, strain and microleakage of endodontically treated premolar teeth restored with direct resin composites

Nessrin A Taha, Joseph EA Palamara, Harold H Messer

JOURNAL OF DENTISTRY | ELSEVIER SCI LTD | Published : 2009

Abstract

OBJECTIVES: To measure cuspal deflection and tooth strain, plus marginal leakage and gap formation caused by polymerization shrinkage during direct resin composite restoration of root-filled premolars. METHODS: Thirty-two first and second maxillary premolars were divided into four groups (n=8). Group 1 had standardised mesio-occlusal-distal (MOD) cavities and served as the control group. Group 2 had endodontic access and root canal treatment through the occlusal floor of the MOD cavity, leaving the axial dentine intact. Group 3 had endodontic access and root canal treatment with the mesial and distal axial dentine removed. Group 4 had endodontic access and root canal treatment with axial den..

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