| Objective:To study the clinical efficacy of the transitional repair of young permanent anterior teeth by using fiber post to link broken crown, and discuss the factors influencing the effect of treatment.Method:110cases(135teeth) of crown fracture patients with the integrity of the young permanent anterior teeth were divided into directly binding group (26cases,30) and fiber post bonding group (84cases,105). According to clinic sequence number, the fiber post bonding group was divided into LuxaCore group and RelyX Unicem group randomly, and the LuxaCore group (42cases,53), according to the location of the broken part(in the middle1/3or cervical1/3) was divided into middle1/3group (19cases,24) and cervical1/3group (23cases,29), and RelyX Unicem group (42cases,52) was divided into1/3group (20cases,23) and cervical1/3group (22cases,29). The other67cases(77teeth) of crown broken patients with the integrity of the young permanent anterior teeth were enrolled in the fiber post and resin repair group as a comparative reference. The directly bonding group was directly bonded with autologous fracture crown, while the fiber post bonding group used the fiber pile connection on autologous crown, and the fiber post and resin repair group applied fiber post and resin to repair the broken crown. After6months to2years’follow-up clinical observation, a permanent repair will be conducted when the patients grow up to be adults. After transitional repair and before permanent repair, patients’satisfaction evaluation and intentions of permanent repair were conducted, using self-made satisfaction evaluation scale. For those who chose to remove the broken part and bond broken part directly with permanent tooth, a follow-up clinical observation will be conducted to observe the repairing effects.Result:Within1year, the success rate of both LuxaCore group and RelyX Unicem group was100%, which is higher than that of the directly bond group (93.33%). The difference was statistically significant (chi square test,χ2=7.1053, P<0.05). the success rate of LuxaCore group (betweenl years and2years) was92.86%, while that of RelyX Unicem group was92.68%, higher than those of the directly bond group73.91%.The difference was also statistically significant (chi square test, χ2=6.3803, P<0.05). The success rate of LuxaCore group (over2years) was84.62%, and that of RelyX Unicem group was81.82%, still higher than those of the directly bonding group which was53.33%. There was a statistically significant difference between them (chi square test,χ2=6.033, P<0.05). The success rate of fiber post bonding in the middlel/3group was higher than that of the cervical1/3group, but no significant difference between the two groups. In the fiber post bonding group, there are21cases choosing not to remove the broken part and directly do the tooth preparation for permanent repair, and1case failed, whose failure rate was4.76%. There is no significant difference among the rate of failure and fiber post and resin repair group. Immediate repair satisfaction survey suggested that the score of fiber post bonding group satisfaction was8.41±1.41, higher than that of directly bonding group, which was7.67±2.09and fiber post and resin repair group (6.58±1.37). The difference was statistically significant (t test, P<0.05). The long-term satisfaction survey suggested that the score of fiber post bonding group satisfaction was6.15±1.76, higher than that of directly bonding group, which was4.58±2.27and fiber post and resin repair group (4.30±1.35). The difference was statistically significant (t test, P<0.01). The survey results of the intention to permanent repair showed that the main reason to refuse the permanent repair was that the appearance and function of the original repair are still good enough. Among all the groups, the percentage of the fiber post bonding group was the highest, up to72.97%, higher than that of fiber post and resin repair group55.81%.Analyzing the factors influencing failure cases, on the factor of the occlusal relationship, the failure rate of cases in normal occlusion group in directly bond is lower than that of the deep overbite and overjet cases. There was a statistically significant difference between them (chi square test,χ2=6.2382, P<0.05). On the root development factors, the failure rate of cases in fiber post bonding group with incomplete root is higher than the completed cases. There was statistically significant difference between them (chi square test t, x2=6.0287, P<0.05). On tooth mobility situation in traumatic tooth, in fiber post bonding group, the failure rate of loosening I°is higher than no loosening cases. There was statistically significant difference between them (chi square test, x2=5.564, P<0.05). On broken line location factors, in directly bonded group, the failure rate of case whose broken location is upgingival is lower than those subgingival. There was statistically significant difference between them (chi square test, x2=5.5767, P<0.05). And in fiber post bonding group, the failure rate of those upgingival is lower than those subgingival, with a statistically significant difference (chi square test,χ2=25.556, P<0.01). Conclusion:The curative effect obtains affirmation by using fiber post to repair the broken crown of young permanent anterior teeth, which is better than the repair of conventional adhesive and fiber post+resin. What’s more, the degree of patients’ immediate and long-term satisfaction is high, and the permanent repair will not be affected in later times. Therefore, it is a good transitional repair method. However, during the process of repair, dentists should pay attention to the impact of the broken parts, occlusal relationship, the development situation of root, tooth mobility situation, and the position of broken line on the success rate of repair. |
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