Masticatory Function of Immediately Loaded Two-Implant Mandibular Overdentures: A 5-year Prospective Study
Masticatory Function of Immediately Loaded Two-Implant Mandibular Overdentures: A 5-year Prospective Study
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DOI：
10.11607/jomi.7565
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发表时间：
2019-11-01
影响因子：
2
通讯作者：
Minakuchi, Shunsuke
中科院分区：
文献类型：
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作者：
Iwaki, Maiko;Kanazawa, Manabu;Minakuchi, Shunsuke
目的：目的：通过引导下不翻瓣种植即刻加载双种植体覆盖义齿修复下颌无牙颌患者，评价其咀嚼功能。材料与方法：本研究纳入了东京医科齿科大学牙科医院的19名下颌无牙患者（平均年龄：69.8岁;范围：60 - 85岁）。一个新制作的全口义齿被用来作为一个放射学指导。计算机规划遵循设计程序，并为每位患者制作手术指南。使用该导向器进行无翻瓣手术，并将两个种植体放置在犬齿位置。手术当天，安装了由两个球形附着体支撑的可移动覆盖义齿。咀嚼功能评价的基础上咀嚼性能的变色口香糖，最大咬合力的咬合力计，咬合接触面积的咬合诊断系统。结果：术后48个月咀嚼功能明显改善。术后24个月最大咬合力显著增加。咬合接触面积从术后6个月开始显著增加。这项前瞻性研究表明，最大咬合力和咬合接触面积在种植手术后相对较早的时期显着改善，并通过带螺柱附着体的双种植体覆盖义齿的立即加载保持长达5年。但咀嚼效能的改善比最大咬合力和咬合接触面积的改善需要更长的时间。结论：根据这项为期5年的前瞻性研究，咀嚼性能，最大咬合力和咬合接触面积分别在术后4至5年，2年和6个月后显着改善。
Purpose: To treat mandibular edentulous patients by fitting immediately loaded two-implant overdentures via guided flapless surgery and evaluate their masticatory performance. Materials and Methods: Nineteen patients who presented with edentulous mandibles (mean age: 69.8 years; range: 60 to 85 years) at the Dental Hospital, Tokyo Medical and Dental University, were enrolled in this study. A newly fabricated complete denture was used as a radiographic guide. Computer planning followed the design procedure, and surgical guides were fabricated for each patient. Flapless surgery was performed using this guide, and two implants were placed in the canine positions. On the day of surgery, a removable overdenture supported by two ball attachments was fitted. Masticatory function was evaluated on the basis of masticatory performance with a color-changeable chewing gum, maximum occlusal force with an occlusal force meter, and occlusal contact area with an occlusal diagnostic system. Results: The masticatory performance significantly improved from 48 months after surgery. The maximum occlusal force significantly increased 24 months after surgery. The occlusal contact area significantly increased from 6 months after surgery. This prospective study indicated that maximum occlusal force and occlusal contact area significantly improved at a comparatively earlier period after implant surgery and were maintained for up to 5 years with the immediate loading of two-implant overdentures with stud attachments. However, masticatory performance took more time to improve than maximum occlusal force and occlusal contact area. Conclusion: According to this 5-year prospective study, masticatory performance, maximum occlusal force, and occlusal contact area showed significant improvement after 4 to 5 years, 2 years, and 6 months postsurgery, respectively.