PDF(Pubmed)
Abstract：
OBJECTIVE: White spot lesions are one of the most common side effects of orthodontic therapy with a multibracket appliance and may indicate a preliminary stage of caries, also known as initial caries. Several approaches may be utilized to prevent these lesions, such as reducing bacterial adhesion in the area surrounding the bracket. This bacterial colonization can be adversely affected by a number of local characteristics. In this context, the effects of excess dental adhesive in the bracket periphery were investigated by comparing a conventional bracket system with the APC flash-free bracket system.
METHODS: Both bracket systems were applied to 24 extracted human premolars, and bacterial adhesion with Streptoccocus sobrinus (S. sobrinus) was performed for 24 h, 48 h, 7 d, and 14 d. After incubation, bacterial colonization was examined in specific areas by electron microscopy.
RESULTS: Overall, significantly fewer bacterial colonies were found in the adhesive area around the APC flash-free brackets (n = 507 ± 13 bacteria) than the conventionally bonded bracket systems (n = 850 ± 56 bacteria). This is a significant difference (**p = 0.004). However, APC flash-free brackets tend to create marginal gaps with more bacterial adhesion in this area than conventional bracket systems (n = 265 ± 31 bacteria). This bacterial accumulation in the marginal-gap area is also significant (*p = 0.029).
CONCLUSIONS: A smooth adhesive surface with minimal adhesive excess is beneficial for reducing bacterial adhesion but also poses a risk of marginal gap formation with subsequent bacterial colonization, which can potentially trigger carious lesions.
CONCLUSIONS: To reduce bacterial adhesion, the APC flash-free bracket adhesive system with low adhesive excess might be beneficial. APC flash-free brackets reduce the bacterial colonization in the bracket environment. A lower number of bacteria can minimize white spot lesions in the bracket environment. APC flash-free brackets tend to form marginal gaps between the bracket adhesive and the tooth.
METHODS: Both bracket systems were applied to 24 extracted human premolars, and bacterial adhesion with Streptoccocus sobrinus (S. sobrinus) was performed for 24 h, 48 h, 7 d, and 14 d. After incubation, bacterial colonization was examined in specific areas by electron microscopy.
RESULTS: Overall, significantly fewer bacterial colonies were found in the adhesive area around the APC flash-free brackets (n = 507 ± 13 bacteria) than the conventionally bonded bracket systems (n = 850 ± 56 bacteria). This is a significant difference (**p = 0.004). However, APC flash-free brackets tend to create marginal gaps with more bacterial adhesion in this area than conventional bracket systems (n = 265 ± 31 bacteria). This bacterial accumulation in the marginal-gap area is also significant (*p = 0.029).
CONCLUSIONS: A smooth adhesive surface with minimal adhesive excess is beneficial for reducing bacterial adhesion but also poses a risk of marginal gap formation with subsequent bacterial colonization, which can potentially trigger carious lesions.
CONCLUSIONS: To reduce bacterial adhesion, the APC flash-free bracket adhesive system with low adhesive excess might be beneficial. APC flash-free brackets reduce the bacterial colonization in the bracket environment. A lower number of bacteria can minimize white spot lesions in the bracket environment. APC flash-free brackets tend to form marginal gaps between the bracket adhesive and the tooth.
摘要：
目的：白斑病变是多支架矫治器正畸治疗中最常见的副作用之一，可能表明龋齿处于初级阶段，也称为初始龋齿。可以使用几种方法来防止这些病变，例如减少支架周围区域的细菌粘附。这种细菌定植可能受到许多局部特征的不利影响。在这种情况下，通过比较常规支架系统与APC无闪光支架系统，研究了支架周围过量牙科粘合剂的影响。
方法：两种支架系统均应用于24颗提取的人类前磨牙，和细菌与链球菌的粘附(S.sobrinus)进行24小时，48h,7d,和14天。孵育后，通过电子显微镜检查特定区域的细菌定植。
结果：总体而言，在APC无闪光支架周围的粘附区域发现的细菌菌落(n=507±13个细菌)明显少于常规粘结支架系统(n=850±56个细菌).这是显著差异(**p=0.004)。然而,与常规支架系统（n=265±31个细菌）相比，APC无闪光支架倾向于在该区域产生更多细菌粘附的边缘间隙。这种细菌在边缘间隙区域的积累也是显著的(*p=0.029)。
结论：具有最小粘附量的光滑粘附表面有利于减少细菌粘附，但也存在形成边缘间隙和随后细菌定植的风险，这可能会引发龋齿病变。
结论：为了减少细菌粘附，具有低粘合剂过量的APC无闪光支架粘合剂系统可能是有益的。APC无闪光支架减少支架环境中的细菌定植。较低数量的细菌可以使支架环境中的白点病变最小化。APC无闪光托架倾向于在托架粘合剂和牙齿之间形成边缘间隙。
方法：两种支架系统均应用于24颗提取的人类前磨牙，
结果：总体而言，
结论：具有最小粘附量的光滑粘附表面有利于减少细菌粘附，但也存在形成边缘间隙和随后细菌定植的风险，
结论：为了减少细菌粘附，
