PDF(Pubmed)
Abstract：
OBJECTIVE: this study aimed to digitally compare wear behavior and retention between PEEK and nylon retentive inserts used in locator-retained, mandibular implant overdentures when attachment design and size were standardized.
METHODS: A total of sixty-four inserts (32 PEEK and 32 nylon inserts); were picked-up in implant overdentures. Overdentures of both groups were submerged in artificial saliva and mounted to chewing simulator. After 480,000 chewing cycles (equivalent to 2 years of clinical use) all inserts were scanned by scanning electron microscope (SEM), then all acquired images were digitally analyzed by software to detect and compare quantitative and qualitative changes of inserts in both groups. On the other hand, retention of both groups was measured by universal testing machine and the collected data was statistically analyzed using one-way Analysis of Variance (ANOVA) test with significance level set at P ≤ 0.05.
RESULTS: PEEK inserts showed significantly higher mean retentive values compared to the nylon inserts in the control group. Also, PEEK retentive inserts exhibited statistically lower mean wear values than the control group P ≥ 0.000. Qualitative investigation revealed significant and more pronounced changes in the surface roughness of nylon inserts compared to PEEK ones.
CONCLUSIONS: Regarding retention, wear behavior and dimension stability, PEEK can be recommended as retentive insert material in cases of locator-retained mandibular implant overdentures.
CONCLUSIONS: PEEK inserts offer enhanced retention, reduced wear, and greater dimensional stability over two years time interval. Clinically, this reduces prosthodontic maintenance and adjustments, improving patient satisfaction and long-term prosthetic success.
METHODS: A total of sixty-four inserts (32 PEEK and 32 nylon inserts); were picked-up in implant overdentures. Overdentures of both groups were submerged in artificial saliva and mounted to chewing simulator. After 480,000 chewing cycles (equivalent to 2 years of clinical use) all inserts were scanned by scanning electron microscope (SEM), then all acquired images were digitally analyzed by software to detect and compare quantitative and qualitative changes of inserts in both groups. On the other hand, retention of both groups was measured by universal testing machine and the collected data was statistically analyzed using one-way Analysis of Variance (ANOVA) test with significance level set at P ≤ 0.05.
RESULTS: PEEK inserts showed significantly higher mean retentive values compared to the nylon inserts in the control group. Also, PEEK retentive inserts exhibited statistically lower mean wear values than the control group P ≥ 0.000. Qualitative investigation revealed significant and more pronounced changes in the surface roughness of nylon inserts compared to PEEK ones.
CONCLUSIONS: Regarding retention, wear behavior and dimension stability, PEEK can be recommended as retentive insert material in cases of locator-retained mandibular implant overdentures.
CONCLUSIONS: PEEK inserts offer enhanced retention, reduced wear, and greater dimensional stability over two years time interval. Clinically, this reduces prosthodontic maintenance and adjustments, improving patient satisfaction and long-term prosthetic success.
摘要：
目的：这项研究旨在数字比较PEEK和用于定位器保留的尼龙保留插入物之间的磨损行为和保留，当附件设计和尺寸标准化时，下颌种植体覆盖义齿。
方法：总共64个嵌入物（32个PEEK和32个尼龙嵌入物）；在种植体覆盖义齿中拾取。两组的覆盖义齿都浸没在人工唾液中，并安装在咀嚼模拟器上。经过480,000次咀嚼循环（相当于2年的临床使用），所有插入件均通过扫描电子显微镜（SEM）进行扫描，然后通过软件对所有获取的图像进行数字分析，以检测并比较两组插入物的定量和定性变化。另一方面,两组患者的保留率采用万能试验机进行测量,收集的数据采用单因素方差分析(ANOVA)检验进行统计学分析,显著性水平设定为P≤0.05.
结果:与对照组中的尼龙插入物相比,PEEK插入物显示出显著更高的平均保持值。此外，PEEK保持刀片的平均磨损值在统计学上低于对照组P≥0.000。定性调查显示，与PEEK相比，尼龙插入物的表面粗糙度发生了显着且更明显的变化。
结论：关于保留，磨损行为和尺寸稳定性，在定位器保留的下颌植入物覆盖义齿的情况下，可以推荐PEEK作为保留插入材料。
结论：PEEK插入提供增强的保留，减少磨损,和更大的尺寸稳定性在两年的时间间隔。临床上,这减少了口腔修复的维护和调整，提高患者满意度和长期假肢的成功。
方法：总共64个嵌入物（32个PEEK和32个尼龙嵌入物）；在种植体覆盖义齿中拾取。两组的覆盖义齿都浸没在人工唾液中，并安装在咀嚼模拟器上。经过480,000次咀嚼循环（相当于2年的临床使用），所有插入件均通过扫描电子显微镜（SEM）进行扫描，然后通过软件对所有获取的图像进行数字分析，以检测并比较两组插入物的定量和定性变化。另一方面,两组患者的保留率采用万能试验机进行测量,收集的数据采用单因素方差分析(ANOVA)检验进行统计学分析,显著性水平设定为P≤0.05.
结果:与对照组中的尼龙插入物相比,PEEK插入物显示出显著更高的平均保持值。此外，PEEK保持刀片的平均磨损值在统计学上低于对照组P≥0.000。定性调查显示，与PEEK相比，尼龙插入物的表面粗糙度发生了显着且更明显的变化。
结论：关于保留，磨损行为和尺寸稳定性，在定位器保留的下颌植入物覆盖义齿的情况下，可以推荐PEEK作为保留插入材料。
结论：PEEK插入提供增强的保留，减少磨损,和更大的尺寸稳定性在两年的时间间隔。临床上,这减少了口腔修复的维护和调整，提高患者满意度和长期假肢的成功。
