BACKGROUND To evaluate the clinical performance of the two types of InVu ceramic brackets. The clinical performance of these brackets was measured by determining failure as well as survival rates and tie-wing fractures. Enamel surface evaluation following bracket and remnant removal was performed. SUBJECTS AND METHODS Forty non-extraction patients (31 females, 9 males) with a mean chronological age of 16 years 4 months composed this study. Bonding was performed with a split-mouth design using operator-coated and Readi-Base eXact InVu brackets. During the treatment period (45.89 ± 2.0 weeks), the failed brackets were recorded as well as the brackets with tie-wing fractures. Debracketing was undertaken with a ligature cutter (delamination technique) as recommended by the manufacturer. A modified remnant index (MRI) was used to visually evaluate the amount of remnants remaining on the tooth surface. Horizontal crack evaluation was carried out via transillumination. RESULTS Operator-coated InVu brackets demonstrated a bond failure rate of 2.6%. This value was 6.8% for the Readi-Base eXact InVu brackets. Failure rates as well as survival rates presented a statistically significant difference (P = 0.006). A higher bond failure for the premolar teeth when compared to incisor teeth, as well as a higher bond failure in the lower arch when compared to the upper arch was found. These findings were statistically significant (P = 0.000 and P = 0.007, respectively). The effect of gender on bond failure rate (P = 0.508) and survival rate (P = 0.503) was not statistically significant. Both bracket types showed comparable results for tie-wing fractures (P = 0.174). A statistically significant difference was obtained for the MRI scores (P = 0.000). No horizontal enamel cracks were observed for both bracket types. CONCLUSION The operator-coated InVu brackets demonstrated a lower failure rate when compared to the Readi-Base eXact pre-applied adhesive InVu brackets. The debonding procedure was safe for both bracket types.

中文翻译：

---

未涂覆和预涂覆的聚合物网状陶瓷支架的临床性能。

背景技术评估两种类型的InVu陶瓷支架的临床性能。这些支架的临床表现通过确定失败率，存活率和系翼骨折来衡量。括号和残留物去除后进行搪瓷表面评估。研究对象和方法40例平均年龄为16岁4个月的非拔牙患者（31例女性，9例男性）组成了本研究。使用操作员涂层和Readi-Base eXact InVu托架，采用裂口设计进行粘合。在治疗期间（45.89±2.0周），记录了失败的托槽以及伴有翼翼骨折的托槽。根据制造商的建议，使用结扎切割机（分层技术）进行包围曝光。使用改良的残留指数（MRI）直观评估牙齿表面残留的残留量。通过透照进行水平裂纹评价。结果涂有操作剂的InVu托槽的粘结失效率为2.6％。对于Readi-Base eXact InVu支架，该值为6.8％。失效率和生存率存在统计学差异（P = 0.006）。与门牙相比，前磨牙的粘结失效更高，而与上牙弓的粘结相比，下牙弓的粘结失效更高。这些发现具有统计学意义（分别为P = 0.000和P = 0.007）。性别对债券失败率（P = 0.508）和生存率（P = 0.503）的影响在统计学上不显着。两种类型的托槽都显示出可比较的结扎翼骨折结果（P = 0.174）。MRI得分获得了统计学上的显着差异（P = 0.000）。两种托架类型均未观察到水平搪瓷裂纹。结论与Readi-Base eXact预涂的粘合InVu支架相比，操作员涂覆的InVu支架表现出更低的故障率。两种托架类型的脱胶步骤都是安全的。