Back to Search Start Over

Surface morphology changes of acrylic resins during finishing and polishing phases

Authors :
Glaucio Serra
Liliane Siqueira de Morais
Carlos Nelson Elias
Source :
Dental Press Journal of Orthodontics, Vol 18, Iss 6, Pp 26-30 (2013)
Publication Year :
2013
Publisher :
Dental Press Editora, 2013.

Abstract

INTRODUCTION: The finishing and polishing phases are essential to improve smoothness and shining on the surface of acrylic resins used to make removable orthodontic appliances. A good surface finishing reduces roughness, which facilitates hygiene, prevents staining and provides greater comfort to the patients. OBJECTIVE: The aim of this paper was to analyze the changes on surface morphology of acrylic resins during finishing and polishing phases. METHODS: Thirty discs (10 mm in diameter and 5 mm in length) were made with acrylic resin and randomly divided into ten groups. The control group did not receive any treatment while the other groups received gradual finishing and polishing. The last group received the entire finishing and polishing procedures. Surface morphology was qualitatively analyzed through scanning electron microscopy and quantitatively analyzed through a laser profilometer test. RESULTS: The acrylic resin surfaces without treatment showed bubbles which were not observed in the subsequent phases. Wearing out with multilaminated burs, finishing with wood sandpaper and finishing with water sandpaper resulted in surfaces with decreasing irregularities. The surfaces that were polished with pumice and with low abrasive liquids showed high superficial smoothness. CONCLUSION: Highly smooth acrylic resin surfaces can be obtained after mechanical finishing and polishing performed with multilaminated burs, wood sandpaper, water sandpaper, pumice and low abrasive liquids.

Details

Language :
English, Portuguese
ISSN :
21776709 and 21769451
Volume :
18
Issue :
6
Database :
Directory of Open Access Journals
Journal :
Dental Press Journal of Orthodontics
Publication Type :
Academic Journal
Accession number :
edsdoj.0597cacf04fd4a58a5f244291ce51c38
Document Type :
article
Full Text :
https://doi.org/10.1590/S2176-94512013000600005