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Abstract：
The appropriate loading protocol to improve masticatory performance (MP) is still unclear in elderly patients and two-implant overdentures (2-IODs) wearers. This study aimed to compare the long-term MP and maximum occlusal force of immediate loading (IL) and conventional loading (CL) of 2-IODs retained by magnetic attachments. Nineteen edentulous patients were randomly assigned to either an IL (n=10) or CL group (n = 9). In the IL group, the implant was loaded on the same day as insertion, whereas it was loaded 3 months after insertion in the CL group. Magnetic attachments were used to retain all overdentures to the implants. MP, measured by a piece of color-changeable chewing gum and a gummy jelly test, and maximum occlusal force, measured using an occlusal force measuring device, were assessed in both groups at baseline and at 3-, 4-, and 5-year follow-ups.
No significant differences were observed in the MP and the maximum occlusal force between the IL and CL groups at any time point. However, a significantly higher MP was observed at the 3-year time point in the IL group (P = 0.036). The maximum occlusal force revealed a significant correlation with MP, both with the color-changeable chewing gum and gummy jelly at 5 years.
After long-term observation, no significant differences in MP and maximum occlusal force were observed between the IL and CL groups. However, compared to pre-implant insertion of the complete denture, the MP in the IL group significantly improved at 3 years. Furthermore, the maximum occlusal force was significantly correlated with MP at 5 years.
UMIN, UMIN000009889 . Registered on 28 January 2013.
No significant differences were observed in the MP and the maximum occlusal force between the IL and CL groups at any time point. However, a significantly higher MP was observed at the 3-year time point in the IL group (P = 0.036). The maximum occlusal force revealed a significant correlation with MP, both with the color-changeable chewing gum and gummy jelly at 5 years.
After long-term observation, no significant differences in MP and maximum occlusal force were observed between the IL and CL groups. However, compared to pre-implant insertion of the complete denture, the MP in the IL group significantly improved at 3 years. Furthermore, the maximum occlusal force was significantly correlated with MP at 5 years.
UMIN, UMIN000009889 . Registered on 28 January 2013.
摘要：
对于老年患者和双种植体覆盖义齿（2-IOD）佩戴者，改善咀嚼性能（MP）的适当加载方案仍不清楚。这项研究旨在比较由磁性附件保留的2-IOD的长期MP和立即加载（IL）和常规加载（CL）的最大咬合力。19例无牙患者被随机分配到IL组（n=10）或CL组（n=9）。在IL组中,植入物在插入的同一天装载，而CL组在插入后3个月加载。使用磁性附件将所有覆盖义齿保留到植入物上。MP,通过一块变色口香糖和软糖果冻测试来测量，和最大咬合力,使用咬合力测量装置测量，在基线和3-，4-,5年随访。
在任何时间点，IL和CL组之间的MP和最大咬合力均未观察到显着差异。然而,在3年时间点,IL组的MP显著增高(P=0.036).最大咬合力显示与MP有显著相关性，在5年时都使用了变色口香糖和软糖果冻。
经过长期观察，IL组和CL组之间MP和最大咬合力没有显着差异。然而,与植入前插入全口义齿相比，IL组MP在3年时显著改善。此外，5年时最大咬合力与MP显著相关。
UMIN,UMIN000009889。2013年1月28日注册。
在任何时间点，IL和CL组之间的MP和最大咬合力均未观察到显着差异。然而,在3年时间点,IL组的MP显著增高(P=0.036).最大咬合力显示与MP有显著相关性，在5年时都使用了变色口香糖和软糖果冻。
经过长期观察，IL组和CL组之间MP和最大咬合力没有显着差异。然而,与植入前插入全口义齿相比，IL组MP在3年时显著改善。此外，5年时最大咬合力与MP显著相关。
UMIN,UMIN000009889。2013年1月28日注册。
