ObjectiveTo evaluate whether a two‐piece abutment is equivalent to a one‐piece in peri‐implant esthetics, patients' satisfaction, and oral health–related quality of life (OHRQOL) for implant‐supported anterior single crown placement.Material and MethodsThirty implants were allocated sequentially: 15 in the one‐piece abutment group (OP) and 15 in the two‐piece abutment group (TP). Peri‐implant esthetics were evaluated by the pink esthetic score (PES) at temporary crown insertion (T1), after tissue conditioning (T2), and at 30 days after the final crown insertion (T3). OHRQOL was measured using the OHIP‐14 and satisfaction was evaluated using the visual analog scale (VAS) at baseline, T1, and T3. Treatment was considered equivalent if the 95% coefficient interval (CI) for mean difference in PES was between −1.5 and +1.5 points. Statistical analysis was performed using Mann–Whitney, SPANOVA, and Student's t‐test, with Sidak's posttest, adopting p < 0.05.ResultsNo differences were found between the groups for any variable and during follow‐up. A significant increase in OHRQOL and satisfaction was observed at T3, when compared to baseline (p < 0.05) for both groups. Significant improvements in peri‐implant esthetics were also observed throughout the treatment, particularly after tissue conditioning (p < 0.05). Primary and secondary outcomes were evaluated for equivalence, and both abutment types were considered equivalent following the insertion of the temporary crowns.ConclusionsTwo‐piece abutment was equivalent to one‐piece abutment for peri‐implant esthetics, quality of life, or the satisfaction of patients rehabilitated with metal‐free single crowns. Tissue conditioning and final crown insertion appear to play a role in improving these outcomes.

中文翻译：

---

美学区单牙冠的一件式与两件式基台：一项临床试验


目的评估两件式基台是否等同于种植体周围美学、患者满意度以及种植体支撑前单冠置入的口腔健康相关生活质量 （OHRQOL）。材料和方法依次分配 30 个种植体：15 个在一体式基台组 （OP），15 个在两件式基台组 （TP）。在临时牙冠插入 （T1） 、组织调节后 （T2） 和最终牙冠插入后 30 天 （T3） 通过粉红色美学评分 （PES） 评估种植体周围美学。使用 OHIP-14 测量 OHRQOL，并在基线、T1 和 T3 使用视觉模拟量表 （VAS） 评估满意度。如果 PES 平均差异的 95% 系数区间 （CI） 在 -1.5 和 +1.5 分之间，则认为治疗是等效的。使用 Mann-Whitney、SPANOVA 和 Student 的 t 检验进行统计分析，采用 sidak 的后测，采用 p < 0.05.结果组间在任何变量和随访期间均未发现差异。与基线相比，两组在 T3 观察到 OHRQOL 和满意度显着增加 （p < 0.05）。在整个治疗过程中，特别是在组织调节后，也观察到种植体周围美学的显着改善 （p < 0.05）。评估主要和次要结局的等效性，并且在插入临时牙冠后，两种基台类型被认为等效。结论两段式基台在种植体周围美学、生活质量或无金属单牙冠康复患者的满意度方面等同于一体式基台。组织调节和最终牙冠插入似乎在改善这些结果方面发挥作用。