Estudo comparativo da rugosidade superficial de resinas compostas submetidas a diferentes métodos de polimento

Abstract

INTRODUCTION: Resin composites should exhibit a smooth surface in order to decrease plaque accumulation, therefore preventing secondary caries, discoloration, gingival inflammation and wear of opposing teeth. OBJECTIVE: To evaluate the surface roughness of two direct use resin composites, after polishing with two different polishing systems. MATERIALS AND METHODS: Eighteen anterior human teeth were prepared with a cavity on the incisal third and restored randomly with two resin composites (Heliomolar®, Ivoclar Vivadent Inc., Principality of Liechtenstein - microfilled; Enamel Plus HRi®, Micerium S.p.A., Italy - nanohybrid). Each specimen of both grups recieved one of the three following surface treatments: no treatment (control group – polyester matrix), finishing and polishing with Sof-LexTM system and finishing and polishing with Enamel Plus SHINY® system. Surface roughness was determined by profilometry. Results were analyzed at a significance level of 0.05. RESULTS: Among all materials, the smoothest surfaces were obtained under a matrix strip in the control group (p<0.05). The finishing and polishing system Enamel Plus SHINY® revealed lower roughness values comparing with the Sof-LexTM system. Both finishing and polishing systems showed lower surface roughness when used in Enamel Plus HRi® resin composite than when used with Heliomolar® resin composite (p<0.05). Apart from the control group, the lowest surface roughness values were obtained using the Enamel Plus SHINY® system for finishing and polishing the Enamel Plus HRi® resin composite. CONCLUSION: The paste-based system Enamel Plus SHINY® appears to result in lower surface roughness values than the Sof-LexTM disc system, and this finding is more pronounced on the Enamel Plus HRi® resin composite.

Date of Award	17 Sept 2012
Original language	Portuguese
Awarding Institution	Universidade Católica Portuguesa
Supervisor	Jorge Leitão (Supervisor) & Vânia Barros (Co-Supervisor)