| A STUDY ON THE EFFECTS OF FINISHING/POLISHING TIMING ON SURFACE FEATURES OF COMPOSITE RESTORATION |
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Kyu-Ho Yang1, Nam-Ki Choi1, Eun-Hae Park1, Young-Jun Lee1, Seon-Mi Kim2 |
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| 연마시기에 따른 복합레진의 표면 특성에 관한 연구 |
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양규호1, 최남기1, 박은혜1, 이영준1, 김선미2 |
1전남대학교 치과대학 소아치과학교실 및 치의학연구소
2광주보건대학 치위생과 |
Correspondence:
Kyu-Ho Yang,
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| Abstract |
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Proper finishing/polishing of dental restorations are critical clinical procedures that enhance both esthetics and longevity of restored teeth. This study was to compare the effects of immediate and delayed finishing/polishing procedures on the surface roughness and surface hardness of tooth-colored restoratives including two microfilled composite resins, such as Filtek A110 and Silux Plus, two hybrid composite resins, such as Revolution formular2 and Palfique Estelite. A total of 48 specimens were made for each material. The first 16 specimens served as the control group and the remaining 32 specimens were randomly divided into two equal groups. The control group was stored in distilled water at 37℃ for 1 week after light polymerization against the Mylar sheet. The first experimental group was finished/polished immediately after light polymerization and stored for 1 week in distilled water at 37℃, whereas the while the second group was finished/polished 1 week after light polymerization and stored in distilled water at 37℃. The results were as follows: 1. The smoothest surface was produced by Mylar sheet and finishing/polishing procedure increased the surface roughness. However, the surface roughness of composite resins were not influenced by the finishing/polishing timing. 2. There were significant differences about surface roughness between Revolution formular 2 and Silux Plus, regarding immediate finishing/polishing, and between Palfique Estelite and Silux Plus regarding delayed finishing/polishing(p<0.05). 3. The sequence of the surface hardness was ascending order by Revolution formular 2, Silux Plus, Filtek A110 and Palfique Estelite. However there were no significant differences about hardness among the control group and two finishing/polishing timing groups. 4. The effects of finishing/polishing time on surface roughness and hardness appeared to be material-dependent. |
| Key Words:
Composite resin; Finishing/polishing timing; Surface roughness and hardness |
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