ArticleJournal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.]2026
Effectiveness of Periodic Repolishing on the Surface and Mechanical Properties of Resin-Based CAD/CAM Materials After Different Cycles of Combined Simulated Toothbrushing and Mechanical Cycling.
Article in Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.], 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectiveThis study aimed to evaluate the effectiveness of periodic repolishing on the surface and mechanical properties of resin-based CAD/CAM materials subjected to combined mechanical cycling and simulated toothbrushing, with or without periodic repolishing.
methodsTwo resin-based CAD/CAM materials were investigated (Tetric CAD [TC] and Shofu HC [SH]). Groups (n = 12) were assigned according to the evaluation period and repolishing (RPL) condition. The aging protocol comprised simulated toothbrushing (ST-200 g load, 250 cycles/min) combined with mechanical cycling (MC-50 N load, 1.67 Hz frequency) performed in aging intervals (AI-2.4 × 10
resultsAging significantly increased surface roughness and reduced microhardness in both resin-based CAD/CAM materials (p < 0.05). Periodically repolished groups (T
conclusionAging significantly affected the surface roughness and microhardness of both materials. Periodic repolishing proved to be an effective strategy for minimizing the effects of aging, thereby reducing surface roughness and preserving microhardness. CLINICAL SIGNIFICANCE: Intraoral repolishing at yearly recall intervals may help control surface degradation, maintain smoother surfaces, and preserve microhardness over time, particularly for indirect restorations fabricated from resin-based CAD/CAM materials.
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