How the initial retentive force of implant-supported overdentures can be affected with splinted and unsplinted attachments systems
How the initial retentive force of implant-supported overdentures can be affected with splinted and unsplinted attachments systems
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夹板和非夹板附着体系统如何影响种植体支持的覆盖义齿的初始固位力
DOI：
10.4103/1735-3327.332095
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发表时间：
2021
影响因子：
--
通讯作者：
M. Razavi
中科院分区：
文献类型：
--
作者：
F. Nejatidanesh;O. Savabi;Ghazal Savabi;M. Razavi
背景：本研究的目的是评价不同附着体系统对种植覆盖义齿固位的影响。材料与方法：本研究在离体牙缺失模型上，采用2枚Straumann种植体，制作不同附着体系统的覆盖义齿。（Dolder杆带有1个和3个金属夹，Hader杆带有1个和3个塑料夹，杆上的球带有2个和4个塑料盖，Rhein塑料盖和Eleptical矩阵）。通过万能试验机以50.8 mm/min的交叉速度记录垂直、后前和侧向的固位值。重复测量ANOVA和邓肯检验用于数据分析（α =0.05）。结果如下：不同脱位方向的附着体固位值差异有统计学意义（P < 0.05）。在垂直方向上，4个球在杆上（56.71 N）和Rhein粉红色帽（27.89 N）的保持力最高和最低。三个金属夹（61.43 N）和Rhein粉色帽（24.77 N）在后前方向上的固位力最高和最低。在横向上，杆上的4个球（62.68 N）和塑料夹（32.27 N）分别表现出最高和最低的保留。结论：如果在种植覆盖义齿附着体的选择中考虑了更高的固位力，临床医生可以使用夹板杆或杆上球上部结构。
Background: The aim of this study was to evaluate the retention of implant-supported overdentures with different attachment systems. Materials and Methods: In this in vitro study edentulous model with 2 Straumann implant in symphyseal region was used to make an overdenture with different attachment systems. (Dolder bar with 1 and 3 metal clips, Hader bar with 1 and 3 plastic clips, ball on bar with 2 and 4 plastic caps, Locator, Rhein plastic caps and Eleptical matrix). Retention values were recorded by universal testing machine with a cross speed of 50.8 mm/min in vertical, posteroanterior, and lateral direction. Repeated measure ANOVA and Duncan tests were used for the data analysis (α =0.05). Results: There was a statistically significant difference between the retention values of studied attachments in different dislodgment directions (P < 0.05). The highest and lowest retention were recorded for 4 balls on bar (56.71 N) and Rhein pink caps (27.89 N) in the vertical direction. Three metal clips (61.43 N) and Rhein pink cap (24.77 had the highest and lowest retention force in the posteroanterior direction. In the lateral direction, 4 balls on bar (62.68 N) and 1 plastic clip (32.27 N) showed the highest and lowest retention, respectively. Conclusion: If the higher retention force has been considered for implant-supported overdenture attachment selection, the clinician can use splinted bar or ball on bar superstructure.