Dominguez Reyes A, Muñoz Muñoz L, Aznar Martín T
School of Dentistry, University of Seville, Seville, Spain.
Dent Traumatol. 2005 Jun;21(3):141-5. doi: 10.1111/j.1600-9657.2005.00289.x.
This study was carried out in order to observe the effectiveness of apexification in young permanent incisors. The sample comprised 26 young permanent incisors with necrotic pulp and open apices. The time taken to obtain apical closure, its form and size were analysed in order to find out if closure was influenced by existing pathology or size of apex. The treated teeth were compared with their corresponding contralateral teeth. The test of McNemar and anova was used and a result of P = 0.05 was considered significant. Teeth with pretreatment apical shapes that were convergent or parallel all resulted in physiological apical shapes after treatment. Eight teeth had divergent apical shapes before treatment. Of these, one had a physiological shape, five ended with rounded apices and two teeth had straight apices post-treatment. Apical closure was obtained in 100% of the cases studied, of these 88.4% needed three to four sessions of calcium hydroxide treatment (an average of 3.23 sessions) in order to obtain apical closure, the average time employed was 12.19 months. Clinical symptoms resolved in all teeth that presented with symptoms. Preoperative symptoms did not affect outcome. Pathology of the tooth before treatment does not influence the time needed to obtain apical closure.
本研究旨在观察年轻恒牙切牙根尖诱导成形术的疗效。样本包括26颗牙髓坏死且根尖孔开放的年轻恒牙切牙。分析获得根尖闭合所需的时间、其形态和大小，以确定闭合是否受现有病变或根尖大小的影响。将治疗后的牙齿与其相应的对侧牙齿进行比较。采用McNemar检验和方差分析，P = 0.05的结果被认为具有显著性。治疗前根尖形态为汇聚型或平行型的牙齿在治疗后均形成生理性根尖形态。8颗牙齿治疗前根尖形态为发散型。其中，1颗形成生理性形态，5颗治疗后根尖呈圆形，2颗治疗后根尖呈直线形。在所研究的所有病例中均实现了根尖闭合，其中88.4%的病例需要进行三到四次氢氧化钙治疗（平均3.23次）才能实现根尖闭合，平均用时12.19个月。所有出现症状的牙齿临床症状均得到缓解。术前症状不影响治疗结果。治疗前牙齿的病变情况不影响获得根尖闭合所需的时间。
