Naseh Roya, Fallahzadeh Farnoosh, Atai Mohammad, Mortezai Omid, Setayeshrad Raheleh
Associate Professor of Orthodontics, Dental Caries Prevention Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
Assistant Professor of Operative Dentistry, Dental Caries Prevention Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
J Clin Exp Dent. 2017 Aug 1;9(8):e1002-e1007. doi: 10.4317/jced.54017. eCollection 2017 Aug.
The aim of study was to evaluate the application of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) and fluoride regarding their effect on the shear bond strength (SBS), bond failure pattern of brackets using the adhesive remnant index (ARI) and assessing the quality of enamel surface using the enamel damage index (EDI).
Sixty extracted premolar teeth were randomly divided into four groups regarding pretreatment application of CPP-ACP and fluoride. Brackets were bonded using the conventional method. Specimens were thermocycled for 1000 cycles and were subsequently tested for the SBS in a universal testing machine. After debonding, the teeth were examined under a stereomicroscope to evaluate the ARI. Then, The EDI was assessed using a scanning electron microscope (SEM). Data were analyzed using ANOVA and the Chi-square test.
Evaluation of SBS, ARI and EDI scores showed no significant difference among the study groups. However, a correlation was found between the ARI and EDI scores, indicating that with more adhesive remnants on enamel surface, enamel damage was lower.
The use of CPP-ACP and fluoride can be considered a prophylactic application since these agents did not compromise bracket bond strength although they did not reduce iatrogenic damage to the enamel. CPP-ACP, Enamel damage, SEM, Shear bond strength, ARI.
本研究旨在评估酪蛋白磷酸肽-无定形磷酸钙（CPP-ACP）和氟化物的应用，观察其对剪切粘结强度（SBS）、使用粘结剂残留指数（ARI）评估托槽的粘结失败模式以及使用釉质损伤指数（EDI）评估釉质表面质量的影响。
60颗拔除的前磨牙根据CPP-ACP和氟化物的预处理应用随机分为四组。采用传统方法粘结托槽。样本进行1000次热循环，随后在万能试验机上测试SBS。脱粘后，在体视显微镜下检查牙齿以评估ARI。然后，使用扫描电子显微镜（SEM）评估EDI。数据采用方差分析和卡方检验进行分析。
SBS、ARI和EDI评分的评估显示各研究组之间无显著差异。然而，发现ARI和EDI评分之间存在相关性，表明釉质表面的粘结剂残留越多，釉质损伤越低。
CPP-ACP和氟化物的使用可被视为一种预防性应用，因为这些制剂虽然没有减少对釉质的医源性损伤，但并未损害托槽粘结强度。CPP-ACP、釉质损伤、SEM、剪切粘结强度、ARI。
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