Abstract
Aim: To evaluate the clinical performance of a composite resin (CR) and a resin-modified glass-ionomer cement (RMGIC) for the treatment of abfraction lesions. Methods: Thirty patients with abfraction lesions in at least two premolar teeth were selected and invited to participate in this study. All restorations were made within the same clinical time frame. One tooth was restored with CR Z100TM (3M, St. Paul, MN, USA), and the other was restored with RMGIC VitremerTM (3M). The restorations were assessed immediately and 1, 6 and 12 months after the restoration, using modified US Public Health Service (USPHS) criteria: marginal integrity, marginal discoloration, wear, retention, secondary caries and hypersensitivity. The statistical analysis was based on Friedman ANOVA test and Mann-Whitney test, considering p<0.05 for statistical significance. Results: Both materials demonstrated satisfactory clinical performance after one year. In the individual analysis of each material, there was a significant difference (p<0.05) in the criteria marginal integrity and wear, for both CR and RMGIC. RMGIC exhibited more damage one year after the restoration. Comparing both materials, it was found a significant difference only for marginal discoloration, while the RMGIC restorations showed the worst prognosis after a year of evaluation. There was no significant difference in the number of retentions, caries or hypersensitivity between CR and RMGIC. Conclusions: It was concluded that CR exhibited the best clinical performance according to the cost-effectiveness and evaluation criteria used in this study.
Highlights
Received for publication: November 04, 2015 Accepted: December 12, 2015Correspondence to: Fabianna da Conceição Dantas de MedeirosDepartament of Dentistry Caicó Campus, Universidade Estadual do Rio Grande do Norte (UERN)Rua André Sales, 667, Paulo VI, CEP 59300-000 Caicó, Braz J Oral Sci. 14(4):[287-293]Abfraction is a concept that explains the pathological loss of cervical tooth structure caused by eccentric occlusal forces on the teeth[1,2]
The findings of this study are in line with the study by Santiago et al (2010)[12], who found no significant difference in marginal integrity and wear for composite resin (CR) at one year postplacement
The flaws identified in the marginal integrity of the CR restorations after six months may be due to failures in the interface between the tooth and the restorative material, especially near the cavosurface angle of the abfraction lesions
Summary
Received for publication: November 04, 2015 Accepted: December 12, 2015Correspondence to: Fabianna da Conceição Dantas de MedeirosDepartament of Dentistry Caicó Campus, UERNRua André Sales, 667, Paulo VI, CEP 59300-000 Caicó, Braz J Oral Sci. 14(4):[287-293]Abfraction is a concept that explains the pathological loss of cervical tooth structure caused by eccentric occlusal forces on the teeth[1,2]. Rua André Sales, 667, Paulo VI, CEP 59300-000 Caicó, Braz J Oral Sci. 14(4):[287-293]. Abfraction is a concept that explains the pathological loss of cervical tooth structure caused by eccentric occlusal forces on the teeth[1,2]. Problems such as dentinal hypersensitivity, increased bacterial biofilm retention and caries incidence are commonly related to abfraction lesions and require the replacement of the lost tooth tissue with restorative materials[3]. The dentist’s choice of the restorative material is usually determined by factors such as micromechanical adhesive retention, tooth structure preservation, and good aesthetic and functional outcomes[5]
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