牙膏對不同聚合方式製成的義齒用樹脂之磨耗影響

The Effect of Dentifrice on the Abrasion of Denture Resin Fabricated by Different Polymerization Method

許洺菘(Ming-Sung Hsu)

指導教授 ： 吳如惠

高雄醫學大學/口腔醫學院/口腔衛生學系碩士在職專班/碩士(2018年)

摘要

目的：探討電腦輔助設計與製造義齒用樹脂與傳統製程義齒用樹脂在抗磨耗表現上的差異，以及分別使用牙膏與水進行刷磨後對不同聚合方式的義齒用樹脂所產生的表面影響與重量變化。
材料與方法：選用四種不同聚合方式之義齒用樹脂材料，分別為自聚式Triplex Cold Polymer (SR)、熱聚式Palapress® vario (PA)、熱凝注射成型式ThermoSens (NY)與注射成型式IvoBase CAD (IB)製作成25×25×2.5 mm試片，分為牙膏組與自來水組，每組共20片試片。每個樣品在拋光後進行前測與觀察，包括：重量、表面粗糙度之量測以及利用掃描式電子顯微鏡進行表面形態觀察。本研究之模擬義齒刷磨是以線性磨耗試驗機以荷重200g模擬刷磨共50,000次，並在每10,000次做為一個量測點，進行與前測相同的量測與觀察。數據結果分析使用SPSS 20.0進行重複測量變異數統計分析，並進行事後比較。
結果：在重量變化方面，牙膏組中的刷磨次數對於重量損失具有顯著性差異 (p<0.001)，其事後比較結果為：SR大於NY、PA大於NY、IB大於NY。而自來水組則不具有顯著差異 (p=0.078)，其事後比較結果為：SR大於PA、SR大於NY、SR大於IB、IB大於NY以及PA大於NY。而在表面粗糙度變化方面，牙膏組中的刷磨次數對於粗糙度上升具有顯著性差異 (p<0.001)，事後比較為SR大於PA、SR大於IB、SR大於NY、PA大於IB、PA大於NY以及IB大於NY。另外；自來水組刷磨次數對於粗糙度上升也具有顯著性差異 (p=0.004)，事後比較結果為：IB大於PA、IB大於SR、IB大於NY、PA大於SR、PA大於NY以及SR大於NY。
結論：義齒用樹脂在經過長期使用之後，皆會產生劣化，導致義齒用樹脂重量損失與表面粗糙度改變。不同聚合方式之義齒用樹脂在表面抗磨耗能力亦不同，以注射成型式NY表現最佳，自聚式SR表現最差。另外；電腦輔助設計與製造所使用之義齒用樹脂有較低的重量損失與較佳的抗磨耗表現。

關鍵字

義齒基底 ； 磨耗 ； 粗糙度 ； 牙膏 ； 聚合物 ； 義齒用樹脂

並列摘要

Objective: The study was to investigate the differences in wear resistance between CAD/CAM denture resins and traditional polymerized denture resins, as well as the effects of dentifrice and water on the surface roughness and weight changes of different polymerized denture resins.
Materials and methods: Four different polymerized denture resin materials were selected: Triplex Cold Polymer (SR), Palapress® vario (PA), ThermoSens (NY) and IvoBase CAD (IB). The specimens were made into size of 25×25×2.5 mm, and were divided into dentifrice group and water group. Each experiment group consisted of 20 samples. After polishing, the weight, surface roughness and surface morphology of each sample were measured (pre-test). In this study, the samples were simulated brushing for 50,000 times using a linear abrasion tester with a load of 200g, and investigated the same measurement (post-test) every 10,000 times of brushing. The surface morphology of samples were observed by SEM and the statistical analysis of repeated measurements of variance was performed using SPSS 20.0 and the post-hoc comparisons were made by Bonferroni.
Results: In terms of weight change, there was a significant difference in dentifrice group (p<0.001), SR>NY, PA>NY, IB>NY in post-hoc, but not in water group (p=0.078), the post-hoc were SR>PA, SR>NY, SR>IB, IB>NY, PA>NY. In terms of surface roughness changes, dentifrice group had a significant difference (p<0.001) with brushing, showing SR>PA, SR>IB, SR>NY, PA>IB, PA>NY, IB>NY in post-hoc. There was also a significant difference in water group (p=0.004) between roughness and brushing, the post-hoc were IB>PA, IB>SR, IB>NY, PA>SR, PA>NY, SR>NY.
Conclusion: The denture resin will deteriorate after long-term use, resulting in a change in weight loss and a higher surface roughness of the denture resin. The resin used for dentures with different polymerization methods showed different wear resistance on the surface. Overall, the injection-molded NY was the best material which perform a better against wear of dentifrice and the performance of self-polymerized SR was the worst. In addition, the CAD/CAM denture resins had lower weight loss and better wear resistance than traditional polymerized denture resins.

並列關鍵字

denture base ； abrasion ； roughness ； dentifrice ； polymerization ； denture resin

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