Giray Figen Eren, Duzdar Lale, Oksuz Mustafa, Tanboga Ilknur
1 Department of Pediatric Dentistry, Faculty of Dentistry, University of Marmara , Istanbul, Turkey .
Photomed Laser Surg. 2014 Jul;32(7):413-21. doi: 10.1089/pho.2013.3701.
The purpose of this study was to investigate the shear bond strength (SBS) of two different adhesive resin cements used to lute ceramics on laser-etched dentin.
Erbium, chromium: yttrium, scandium, gallium, garnet (Er,Cr:YSGG) laser irradiation has been claimed to improve the adhesive properties of dentin, but results to date have been controversial, and its compatibility with existing adhesive resin cements has not been conclusively determined.
Two adhesive cements, one "etch-and-rinse" [Variolink II (V)] and one "self-etch" [Clearfil Esthetic Cement (C)] luting cement, were used to lute ceramic blocks (Vita Celay Blanks, Vita) onto dentin surfaces. In total, 80 dentin specimens were distributed randomly into eight experimental groups according to the dentin surface-etching technique used Er,Cr:YSGG laser and Er:YAG laser: (1) 37% orthophosphoric acid+V (control group), (2) Er,Cr:YSGG laser+V, (3) Er,Cr:YSGG laser+acid+V, (4) Er:YAG laser+V, (5) Er:YAG laser+acid+V, (6) C, (7) Er,Cr:YSGG laser+C, and (8) Er:YAG laser+C. Following these applications, the ceramic discs were bonded to prepared surfaces and were shear loaded in a universal testing machine until fracture. SBS was recorded for each group in MPa. Shear test values were evaluated statistically using the Mann-Whitney U test.
No statistically significant differences were evident between the control group and the other groups (p>0.05). The Er,Cr:YSGG laser+A+V group demonstrated significantly higher SBS than did the Er,Cr:YSGG laser+V group (p=0.034). The Er,Cr:YSGG laser+C and Er:YAG laser+C groups demonstrated significantly lower SBS than did the C group (p<0.05).
Dentin surfaces prepared with lasers may provide comparable ceramic bond strengths, depending upon the adhesive cement used.
本研究旨在调查两种不同的粘结树脂水门汀用于在激光蚀刻牙本质上粘结陶瓷时的剪切粘结强度（SBS）。
铒铬：钇钪镓石榴石（Er,Cr:YSGG）激光照射据称可改善牙本质的粘结性能，但迄今为止结果存在争议，其与现有粘结树脂水门汀的兼容性尚未最终确定。
使用两种粘结水门汀，一种“酸蚀冲洗型”[Variolink II（V）]和一种“自酸蚀型”[Clearfil Esthetic Cement（C）]粘结水门汀，将陶瓷块（Vita Celay Blanks，Vita公司）粘结到牙本质表面。根据使用Er,Cr:YSGG激光和Er:YAG激光的牙本质表面蚀刻技术，总共80个牙本质标本被随机分为8个实验组：（1）37%正磷酸+V（对照组），（2）Er,Cr:YSGG激光+V，（3）Er,Cr:YSGG激光+酸+V，（4）Er:YAG激光+V，（5）Er:YAG激光+酸+V，（6）C，（7）Er,Cr:YSGG激光+C，以及（8）Er:YAG激光+C。在进行这些处理后，将陶瓷圆盘粘结到制备好的表面，并在万能试验机上进行剪切加载直至断裂。记录每组的SBS，单位为MPa。使用Mann-Whitney U检验对剪切测试值进行统计学评估。
对照组与其他组之间无明显统计学差异（p>0.05）。Er,Cr:YSGG激光+酸+V组的SBS显著高于Er,Cr:YSGG激光+V组（p=0.034）。Er,Cr:YSGG激光+C组和Er:YAG激光+C组的SBS显著低于C组（p<0.05）。
根据所使用的粘结水门汀，用激光制备的牙本质表面可能提供相当的陶瓷粘结强度。
