热机械负载后块状填充型复合树脂的磨损。

Wear of Bulk-fill Composite Resins After Thermo-mechanical Loading.

机构信息

Tariq A Alsahafi, BDS, MS, Division of Comprehensive Oral Health, University of North Carolina, Adams School of Dentistry, Chapel Hill, NC, USA; Division of Conservative Dentistry, Qassim University, School of Dentistry, Qassim, Saudi Arabia.

Ricardo Walter, DDS, MS, Division of Comprehensive Oral Health, University of North Carolina, Adams School of Dentistry, Chapel Hill, NC, USA.

出版信息

Oper Dent. 2023 Jul 1;48(4):416-424. doi: 10.2341/22-039-L.

DOI:10.2341/22-039-L

PMID:37226712

Abstract

STATEMENT OF PROBLEM

Wear of conventional composite resin presented many challenges when restoring posterior teeth and resulted in clinical complications. Bulk-fill composite resins have been proposed as a more suitable and wear-resistant alternative.

OBJECTIVE

To evaluate and compare the volumetric wear (mm3) of bulk-fill composite resins to a conventional composite resin and enamel after thermo-mechanical loading.

METHODS AND MATERIALS

Five composite resins (n=10) were evaluated: four bulk-fill composite resins (Filtek One Bulk Fill [3M Oral Care], Tetric EvoCeram Bulk Fill [Ivoclar Vivadent], Tetric PowerFill [Ivoclar Vivadent], SonicFill 3 [Kerr Corp]); and one conventional composite resin (Filtek Supreme Ultra [3M Oral Care]). Enamel from recently extracted human teeth was used as a control. Specimens were subjected to a 2-body volumetric wear evaluation using a chewing simulator (CS-4.8, Mechatronik). Disc-shaped specimens (10 mm in diameter × 3 mm in thickness) received 500,000 load cycles against steatite antagonists while simultaneously thermocycled (5000 cycles, 5-55°C). Volumetric wear (mm3) was measured using the Geomagic Control X software (3D Systems) based on digital scans of the specimens obtained before and after thermo-mechanical loading, with a Trios 3 (3Shape) digital scanner. Scanning electron microscopy analysis of wear facets and composite resin filler shape and size was performed. Volumetric wear was statistically analyzed using the one-way ANOVA and Tukey's post-hoc test (α=0.05).

RESULTS

All tested composite resins wore at rates significantly higher than enamel (p<0.05). The mean volumetric wear of the composite resins ranged from 1.01 mm3 to 1.48 mm3, while enamel had a mean volumetric wear of 0.25 mm3. Bulk-fill composite resins showed higher wear resistance than the conventional composite resin (p<0.05).

CONCLUSIONS

Bulk-fill composite resins showed higher wear resistance than the conventional composite resin, and both types of composite resin were not as wear-resistant as enamel.

摘要

问题陈述

传统复合树脂在修复后牙时出现了许多磨损问题，并导致了临床并发症。块状填充型复合树脂作为一种更合适且耐磨的替代材料被提出。

目的

评估和比较块状填充型复合树脂与传统复合树脂和釉质在热机械负载下的体积磨损（mm3）。

方法和材料

评估了五种复合树脂（n=10）：四种块状填充型复合树脂（Filtek One Bulk Fill[3M Oral Care]、Tetric EvoCeram Bulk Fill[Ivoclar Vivadent]、Tetric PowerFill[Ivoclar Vivadent]、SonicFill 3[Kerr Corp]）和一种传统复合树脂（Filtek Supreme Ultra[3M Oral Care]）。釉质取自最近拔除的人类牙齿作为对照。使用咀嚼模拟器（CS-4.8，Mechatronik）对圆盘形试件（直径 10mm，厚度 3mm）进行了 2 体体积磨损评估。在与滑石对牙同时进行 50 万次负载循环的同时，对试件进行热循环（5000 次，5-55°C）。使用 Geomagic Control X 软件（3D Systems）根据试件在热机械负载前后的数字扫描测量体积磨损（mm3），使用 Trios 3（3Shape）数字扫描仪。对磨损面和复合树脂填料形状和尺寸进行扫描电子显微镜分析。使用单因素方差分析和 Tukey 事后检验（α=0.05）对体积磨损进行统计学分析。