State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, China.
Air Force Medical Center, Fourth Military Medical University, Beijing, China.
Clin Implant Dent Relat Res. 2021 Feb;23(1):131-139. doi: 10.1111/cid.12976. Epub 2021 Feb 16.
There is lack of reliable predictors for success of conventional complete denture (CCD) therapy, which in turn might affect the effectiveness of subsequent implant-retained overdenture (IOD) therapy.
To investigate relationships between digitally obtained geometrical mandibular residual ridge measures and perceived CCD-stability.
30 CCD wearing patients (67.9 ± 7.0 years) for whom a new set of CCDs was advised, were treated with new CCDs. Digitalized mandibular gypsum models were measured using the Geomagic Studio 2013 software. Data were obtained for (1) height, width, and cross-section surface area of the residual ridge at different locations (midline, premolar, and anterior edge of retromolar pad) and (2) denture base surface area. Scatter plots and multivariate regression analyses were used to investigate associations between the geometric data and denture base surface area, and correlated with denture stability scores (Spearman rank test).
Scatter plots showed that best model fit for denture base surface area was mean ridge height (R = 0.906). Multivariate regression showed that height at premolar location (p = 0.001) had largest effect on denture base surface area (R = 0.796). Ridge morphology variables, except width at midline location, were significantly correlated with CCD-stability (p-values <0.05). CCD-stability was significantly correlated with denture base surface area (p ≤ 0.001).
Residual ridge height at premolar location was most predictive for denture base surface area and perceived CCD-stability.
传统全口义齿（CCD）治疗的成功率缺乏可靠的预测指标，这反过来可能会影响后续种植覆盖义齿（IOD）治疗的效果。
研究数字化获得的下颌剩余牙槽嵴几何测量值与全口义齿稳定性感知之间的关系。
为 30 名（67.9±7.0 岁）需要制作新全口义齿的患者进行了新全口义齿治疗。使用 Geomagic Studio 2013 软件对数字化的下颌石膏模型进行测量。获得的数据包括：（1）不同位置（中线、前磨牙和磨牙后垫前缘）剩余牙槽嵴的高度、宽度和横截面表面积，以及（2）义齿基托表面积。使用散点图和多元回归分析来研究几何数据与义齿基托表面积之间的关联，并与义齿稳定性评分（Spearman 秩检验）相关联。
散点图显示，义齿基托表面积的最佳模型拟合是平均牙槽嵴高度（R = 0.906）。多元回归显示，前磨牙位置的高度（p = 0.001）对义齿基托表面积的影响最大（R = 0.796）。除了中线位置的宽度外，牙槽嵴形态变量与 CCD 稳定性显著相关（p 值 <0.05）。CCD 稳定性与义齿基托表面积显著相关（p ≤ 0.001）。
前磨牙位置的剩余牙槽嵴高度是预测义齿基托表面积和感知的 CCD 稳定性的最主要因素。
