Abstract：
This randomized, controlled clinical trial compares the clinical performance of glass-fibre and resorbable polylactic acid (PLA) intracanal posts used to restore carious primary incisors in young patients. The study sample includes 180 primary upper central incisors of 90 children aged 3 to 4 years. All patients were randomly divided into two equal groups of 45 children who received PLA and glass-fibre (GFP) intracanal posts. The clinical assessment of incisor restorations was carried out immediately upon completion and at months 3, 6 and 12 according to the following criteria: anatomical form, marginal adaptation, surface roughness, marginal pigmentation, colour match, secondary caries and contact point. The Gingival Index (GI), the Bleeding Index (Cowell modification; mBI), and bite force (BF) were measured. At the 3-month follow-up, the occlusal BF of patients who received PLA posts was higher than the baseline; the GI and mBI scores were lower, by contrast (p < 0.05). This tendency was even more pronounced 6 and 12 months after the restoration. The incidence of side effects or symptoms (apical inflammation, cervical fracture, loosening of the crown) after the PLA posts was significantly lower than after the GFP (p < 0.05). No statistically significant differences were present between the two groups with respect to colour matching, anatomical form, marginal adaptation, marginal pigmentation, surface roughness, occlusal contact and secondary caries. Based on the results, applying PLA intracanal posts and cyanoacrylate to residual anterior crowns in young children can improve their gingival health, reduce side effects, and increase the likelihood of successful restoration.
摘要：
这个随机的，对照临床试验比较了玻璃纤维和可吸收聚乳酸（PLA）肛内桩的临床表现，用于恢复年轻患者的龋齿初级切牙。研究样本包括90名3至4岁儿童的180个主要上中央切牙。将所有患者随机分为两组，每组45名接受PLA和玻璃纤维（GFP）肛门内支架的儿童。根据以下标准，在完成后立即进行门牙修复的临床评估，并在第3、6和12个月进行：解剖形式，边际适应，表面粗糙度,边缘色素沉着，颜色匹配,继发性龋齿和接触点。牙龈指数（GI），出血指数(Cowell修改；MBI)，和咬合力（BF）进行了测量。在3个月的随访中，接受PLA职位的患者的咬合BF高于基线；GI和mBI评分较低，相比之下(p<0.05)。恢复后6个月和12个月，这种趋势更加明显。副作用或症状的发生率（顶端炎症，颈椎骨折,牙冠松动)后PLA柱显着低于GFP后(p<0.05)。在颜色匹配方面，两组之间没有统计学上的显着差异。解剖形式，边际适应，边缘色素沉着，表面粗糙度,咬合接触和继发性龋齿。根据结果,将PLA内桩和氰基丙烯酸酯应用于幼儿残余的前冠可以改善他们的牙龈健康，减少副作用，并增加成功恢复的可能性。
