Department of Prosthodontics/Dental Materials Science, Institute of Odontology, The Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden.
Clin Exp Dent Res. 2024 Feb;10(1):e820. doi: 10.1002/cre2.820. Epub 2023 Dec 3.
The objective of this in vitro study was to evaluate the shear bond strength between the ceramic veneer and additively manufactured titanium with different surface treatments, and to compare with milled titanium. Also, to characterize the surface and the presence of an α-case layer of additively manufactured and milled titanium.
Sixty additively manufactured titanium grade 23, and 20 milled titanium grade 4 cylindrical specimens were divided into four groups based on surface treatments, air-particle abrasion and grinding. After ceramic veneering half of each group were thermocycled. The bond strength was analyzed using a shear bond strength test. The surfaces were analyzed using interferometry and scanning electron microscopy.
The grinding procedure and air-particle abrading pressure had no significant effect on the shear bond strength (p = .264 and p = .344). Thermocycling showed a tendency towards an effect but not significant (p = .052). The group with the highest air-abrading pressure showed the highest surface roughness. No presence of an α-case layer was detected in any of the groups.
Additively manufactured titanium grade 23 may be veneered with ceramics without prior grinding of the surfaces.
本体外研究的目的是评估不同表面处理的陶瓷贴面与增材制造钛之间的剪切结合强度，并与铣削钛进行比较。此外，还对增材制造和铣削钛的表面和α-相层的存在进行了特征描述。
将 60 个增材制造的 23 级钛和 20 个铣削的 4 级钛圆柱形试件根据表面处理（空气颗粒喷砂和研磨）分为四组。在对每组试件的一半进行陶瓷贴面后，对其进行热循环。使用剪切结合强度测试来分析结合强度。使用干涉仪和扫描电子显微镜对表面进行分析。
研磨程序和空气颗粒喷砂压力对剪切结合强度没有显著影响（p=0.264 和 p=0.344）。热循环显示出有影响的趋势，但不显著（p=0.052）。喷砂压力最高的组显示出最高的表面粗糙度。在任何一组中都未检测到α-相层的存在。
无需对表面进行研磨，即可在增材制造的 23 级钛上进行陶瓷贴面。
