PDF(Pubmed)
Abstract：
BACKGROUND: Effect of aging on tissue adaptability and retention of digital obturator is still under investigation.
METHODS: A maxillary Armany (class I) epoxy reference model was scanned to fabricate digital obturator fabricated from milled Co-Cr framework and 3D printed bulb. A color map of the scanned reference and digital obturator was made using Geomagic software to evaluate the accuracy of fit before and after cyclic loading using ROBOTA chewing simulator at 37,500, 75,000 and 150,000 cycles to simulate clinically 3-, 6- and 12-months chewing condition. Insertion-removal condition simulating the placement and removal of the obturator was done using repeated 360, 720 and 1440 cycles and retention was evaluated before and after the repeated cycles. Data were collected, tabulated and statistically analyzed using Statistical Package for Social Sciences (IBM SPSS Statistics 26). Student t-test and multi variable ANOVA test were used to detect significance. P-value < 0.05 was considered significant difference.
RESULTS: For retention test: There was a significant difference between baseline and 3, 6 and12 months. For the tissue surface adaptation test: There was significant difference at all measured areas (P-value < 0.05) before and after application of load.
CONCLUSIONS: digitally designed and fabricated obturator was highly retentive and has excellent tissue surface adaptation upon fabrication, After application of load; reduction of retention and lack of tissue adaptation were resulted. THE CLINICAL IMPLICATION: of this manuscript is that digital obturator can be used successfully with the shortcomings of loosening retention and adaptation afterwhile. So, clinical trials should investigate the clinical acceptance of these shortcomings.
METHODS: A maxillary Armany (class I) epoxy reference model was scanned to fabricate digital obturator fabricated from milled Co-Cr framework and 3D printed bulb. A color map of the scanned reference and digital obturator was made using Geomagic software to evaluate the accuracy of fit before and after cyclic loading using ROBOTA chewing simulator at 37,500, 75,000 and 150,000 cycles to simulate clinically 3-, 6- and 12-months chewing condition. Insertion-removal condition simulating the placement and removal of the obturator was done using repeated 360, 720 and 1440 cycles and retention was evaluated before and after the repeated cycles. Data were collected, tabulated and statistically analyzed using Statistical Package for Social Sciences (IBM SPSS Statistics 26). Student t-test and multi variable ANOVA test were used to detect significance. P-value < 0.05 was considered significant difference.
RESULTS: For retention test: There was a significant difference between baseline and 3, 6 and12 months. For the tissue surface adaptation test: There was significant difference at all measured areas (P-value < 0.05) before and after application of load.
CONCLUSIONS: digitally designed and fabricated obturator was highly retentive and has excellent tissue surface adaptation upon fabrication, After application of load; reduction of retention and lack of tissue adaptation were resulted. THE CLINICAL IMPLICATION: of this manuscript is that digital obturator can be used successfully with the shortcomings of loosening retention and adaptation afterwhile. So, clinical trials should investigate the clinical acceptance of these shortcomings.
摘要：
背景：老化对组织适应性和数字闭塞器保留的影响仍在研究中。
方法：扫描上颌Armany（I类）环氧树脂参考模型，以制造由铣削的Co-Cr框架和3D打印灯泡制成的数字闭塞器。使用Geomagic软件制作扫描参考和数字闭塞器的彩色图，以评估使用ROBOTA咀嚼模拟器在37,500、75,000和150,000个循环循环加载之前和之后的拟合精度，以模拟临床3-，6个月和12个月的咀嚼情况。使用重复的360、720和1440循环进行模拟闭塞器的放置和移除的插入-移除条件,并在重复的循环之前和之后评估保留。收集数据,使用社会科学统计软件包(IBMSPSSStatistics26)进行表格和统计分析。使用学生t检验和多变量ANOVA检验来检测显著性。P值<0.05被认为是显著差异。
结果：对于保留测试：基线和3、6和12个月之间存在显著差异。对于组织表面适应性测试:在施加负荷之前和之后,在所有测量区域存在显著差异(P值<0.05)。
结论：数字设计和制造的闭塞器是高度保持性的，并且在制造时具有出色的组织表面适应性，施加负荷后;导致保留减少和缺乏组织适应。临床意义：本手稿的目的是数字闭塞器可以成功使用，但缺点是松开保留和适应之后。所以,临床试验应该调查这些缺点的临床接受程度。
方法：扫描上颌Armany（I类）环氧树脂参考模型，以制造由铣削的Co-Cr框架和3D打印灯泡制成的数字闭塞器。使用Geomagic软件制作扫描参考和数字闭塞器的彩色图，以评估使用ROBOTA咀嚼模拟器在37,500、75,000和150,000个循环循环加载之前和之后的拟合精度，以模拟临床3-，6个月和12个月的咀嚼情况。使用重复的360、720和1440循环进行模拟闭塞器的放置和移除的插入-移除条件,并在重复的循环之前和之后评估保留。收集数据,使用社会科学统计软件包(IBMSPSSStatistics26)进行表格和统计分析。使用学生t检验和多变量ANOVA检验来检测显著性。P值<0.05被认为是显著差异。
结果：对于保留测试：基线和3、6和12个月之间存在显著差异。对于组织表面适应性测试:在施加负荷之前和之后,在所有测量区域存在显著差异(P值<0.05)。
结论：数字设计和制造的闭塞器是高度保持性的，并且在制造时具有出色的组织表面适应性，施加负荷后;导致保留减少和缺乏组织适应。临床意义：本手稿的目的是数字闭塞器可以成功使用，但缺点是松开保留和适应之后。所以,临床试验应该调查这些缺点的临床接受程度。
