Effects of finishing/polishing time on surface characteristics of tooth‐coloured restoratives

Abstract

This study compared the effects of immediate and delayed finishing/polishing procedures on the surface characteristics (surface roughness and hardness) of tooth-coloured restoratives including a microfilled, a heavily filled and a polyacid-modified composite resin and a resin-modified glass-ionomer cement. Eighty-four specimen discs were made for each material; the first 12 were used as controls and the remaining 72 specimens were randomly divided into two equal groups. The first group was finished/polished immediately after light polymerization and stored for 1 week in distilled water at 37 degrees C while the second group was finished/polished after 1 week storage in distilled water at 37 degrees C. Finishing and polishing was carried out using the following systems: Enhance system, white stones with Vaseline and Super-snap disks system. The finished/polished surfaces were subjected to profilometric evaluation and microhardness testing. The effects of delayed finishing/polishing procedures on surface roughness and hardness appear to be both material and technique dependent. Delayed finishing/polishing of polyacid-modified composite resins and resin-modified glass-ionomer cements generally resulted in a smoother surface. The surface roughness of composite resins after finishing/polishing procedures were generally not influenced by the finishing/polishing time. For all materials, delayed finishing/polishing with the various techniques generally resulted in a surface of similar hardness to or harder than that obtained with immediate finishing/polishing and the control group.

The Effect of Polishing Techniques and Time on the Surface Characteristics and Sealing Ability of Resin Composite Restorations After One-year Storage

“…26,35 In this experiment, all the evaluations were conducted after one-year storage in saline at 37°C for all specimens. In this way, the maturity of the composites was common at the evaluation time, and any differences in hardness could be attributed to the effects of the polishing procedures at both intervals.…”

“…23 Different methods can be used for restorations' finishing and polishing; 21 however, there is a lack of consensus as to which material and technique provides the smoothest surfaces for composites, 15,[24][25] and little research has been conducted on the influence of delay in polishing on surface roughness, hardness and the marginal sealing of composite restorations. 15,[26][27][28] Still, there are no publications that address the effect of aging processes or long-term storage related to these properties.…”

Alternative Technique for Class V Resin Composite Restorations with Minimum Finishing/Polishing Procedures

“…However, properly contoured restorations are seldom achieved without the need to remove excess material. [35][36][37] Specifically, in Class V restorations, finishing and polishing procedures frequently lead to iatrogenic damage to the soft and hard tissues.…”

Influence of the Surface roughness on translucency and surface color of the dental composite resins

“…또한 거친 복합레 진의 표면은 색소 침착에 따른 착색과 변색 등으로 색조의 안정성을 저하시킴으로써 수복물을 재수복해야 하는 결과 를 초래하기도 한다 7) . 많은 학자들의 연구에서 보고되었듯이 [1][2][3][8][9][10][11][12][13][14][15][16][17][18][19][20][21] 복합레진 수 복물에서 얻을 수 있는 가장 평활한 면은 기계적인 활택술 을 시행하지 않고 matrix strip으로 형성된 표면이다. 하지 만 실제 임상에서 matrix strip 만으로 외형을 완성하기는 불가능하며, 적절한 외형 형성을 위해 별도의 연마 과정이 요구된다.…”

“…하지만 표면 연마를 시행하면 표면의 organic-inorganic ratio는 증가하나 이는 표면이 거칠어져 biofilm을 증가시 키게 된다 24) . 결론적으로 거친 표면에 의해 발생되는 많은 문제점들을 최소화하기 위해서는 최상의 활택을 얻을 수 있는 연마 방 법을 개발하는 것이며, 이전의 많은 연구 [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] 에서 보고된 것 처럼 현재 임상에서 사용하고 있는 다양한 연마 기구들 중 에서는 Sof-Lex 디스크와 같은 aluminum oxide 디스크를 건조한 상태에서 25) , planar motion 26) 으로 사용하는 방법이 가장 효과적일 것이다. 하지만 이 방법도 복합 레진에 한정 해 적용되며 자가 중합형 혹은 광중합형 글래스 아이오노머 시멘트나 컴포머와 같이 복합레진에 비해 표면 연마가 어려 운 다른 심미수복 재료에는 matrix strip의 적절한 응용이 나 다른 연마 방법의 모색이 더 필요할 것이다 [27][28][29][30][31] .…”