OBJECTIVE This study explored factors affecting speech improvement in patients with an edentulous maxilla after the delivery of a complete-arch implant-supported fixed dental prosthesis (IFDP). MATERIALS AND METHODS Patients who had received IFDP for edentulous maxilla were enrolled, and various potential speech improvement-related factors were considered, including patient demographics, anterior residual bone volume, preoperative facial features, preoperative acoustic parameters, and adaptation time. Acoustic analysis and perceptual ratings were used to assess three fricatives [s], [f], and [ɕ]. Correlation and regression analyses were conducted to assess the association between changes in fricatives and potential factors (α = .05). RESULTS The study included 50 patients (18 females and 32 males, aged 50.62 ± 15.71 years, range 19-76). Significant correlations were found among the change in the center of gravity (ΔCoG) of [s] and anterior residual bone volume, zygomatic implants number and proportion (p < .05). These correlations were largely mirrored in the perceptual score (ΔPS) changes. After controlling for age, sex, preoperative acoustic parameters, and adaptation time, the ΔCoG and ΔPS of fricatives were mainly correlated with the anterior residual bone volume, preoperative acoustic parameters, and adaptation time. CONCLUSION Speech improvements post-IFDP delivery are mainly related to preoperative speech characteristics, anterior residual bone volume, and adaptation time. The residual bone volume's impact on consonants varies with specific articulatory gestures. This study provides insights into forecasting speech outcomes following IFDP restoration and provides recommendations and methods for data collection in developing future prediction models.

中文翻译：

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上颌全弓种植体支撑修复术后影响言语改善的因素：一项回顾性研究。


目的 本研究探讨了影响全牙弓种植体支撑固定牙科修复体 （IFDP） 后无牙颌上颌患者言语改善的因素。材料和方法 纳入接受无牙颌上颌 IFDP 的患者，考虑各种潜在的言语改善相关因素，包括患者人口统计学、前残余骨量、术前面部特征、术前声学参数和适应时间。声学分析和感知评分用于评估三个擦音 [s]、[f] 和 [ɕ]。进行相关性和回归分析以评估擦音变化与潜在因素之间的关联 （α = .05）。结果 该研究包括 50 名患者 （18 名女性和 32 名男性，年龄 50.62 ± 15.71 岁，年龄在 19-76 岁之间）。发现 [s] 的重心 （ΔCoG） 变化与前残余骨体积、颧骨植入物数量和比例之间存在显著相关性 （p < .05）。这些相关性在很大程度上反映在感知分数 （ΔPS） 变化中。在控制了年龄、性别、术前声学参数和适应时间后，擦音的 ΔCoG 和 ΔPS 主要与前残余骨体积、术前声学参数和适应时间相关。结论 IFDP 分娩后言语改善主要与术前言语特征、前残余骨体积和适应时间有关。残余骨量对辅音的影响因特定的发音手势而异。本研究提供了对 IFDP 恢复后预测语音结果的见解，并为开发未来预测模型的数据收集提供了建议和方法。