Prognosis of Indirect Composite Resin Cuspal Coverage on Endodontically Treated Premolars and Molars: An In Vivo Prospective Study.
OBJECTIVE
This prospective clinical study evaluated the success rate of indirect composite resin cuspal coverage on endodontically treated molars and premolars and the survival rate of the restored teeth.


METHODS
One hundred fifty endodontically treated teeth were restored with total resin cuspal coverage and randomly selected for the study. Patients were recalled after 2 to 5 years for clinical evaluation. Data were subjected to standard tests of statistical correlations using Spearman test.


RESULTS
Out of the 150 teeth, 84 were molars and 66 were premolars. Of these teeth, 58.7% had mesio-occlusal-distal (MOD) cavities, 20.7% had mesio-occlusal (MO), and 20.7% had occlusal-distal (OD). A build-up procedure was performed in 51.3% of the teeth, and buccal veneer composite resins were placed at the margins of 96.7% of the teeth. Out of the 150 teeth, 30 (20%) presented margin discoloration, 3 teeth (2%) had restoration reparable fractures, 2 teeth (1.3%) had restoration irreparable fractures, and 1 tooth (0.7%) exhibited secondary recurrent caries. The opposing arch that occluded with the treated teeth presented 58% natural teeth (no restoration material), 26.7% ceramic crowns, and 15.3% implant-supported ceramic crowns. Statistically significant differences (p = 0.018) between irreparable restoration fractures and the type of support material present in the opposing arch were found.


CONCLUSIONS
In a period of up to 5 years, the resin cuspal coverage of endodontic treated teeth had a success rate of 96%, while the tooth survival rate was 100%. The type of support material on the opposing arch may influence the longevity of the restoration of endodontically treated teeth.
Clinical Assistant Faculty, Occlusion and Oral Rehabilitation, Lisbon University, School of Dental Medicine, Lisbon, Portugal.
Maria Carlos Real
MCR
Dias
Department of Endodontics, Implantology Institute, Lisbon, Portugal.
Jorge N R
JNR
Martins
Clinical Assistant Faculty, Implant Dentistry, Lisbon University, School of Dental Medicine, Lisbon, Portugal.
André
A
Chen
Assistant Professor of the Master of Endodontics, International University of Catalunya, Barcelona, Spain.
Sérgio André
SA
Quaresma
Professor of Statistics and Probabilities, University of Lisbon Dental School, Lisbon, Portugal.
Henrique
H
Luís
Full Professor and Chairman of the Implantology Department, Lisbon University, School of Dental Medicine, Lisbon, Portugal.
João
J
Caramês
D000328:Adult; D001641:Bicuspid; D003188:Composite Resins; D003731:Dental Caries / Q000628:therapy*; D003793:Dental Restoration, Permanent / Q000379:methods*; D003801:Dental Veneers; D005260:Female; D006801:Humans; D008297:Male; D008963:Molar; D011379:Prognosis; D011446:Prospective Studies; D019553:Tooth, Nonvital / Q000628:therapy*; D016896:Treatment Outcome
D003188:Composite Resins
Composite resins; dental cavity preparation; dental restoration failure; follow-up studies; root canal therapy