牙槽嵴形态对全口义齿重衬效果的影响

The effect of form of alveolar ridge on relining of complete dentures

目的:应用模型测量分析结合问卷调查,评价重衬术对全口义齿修复效果的影响,预测义齿重衬后的效果。方法:对15例全口义齿修复下半口义齿固位不佳的患者,通过闭口印模,制取下半口模型,在模型的5个标志线处切割模型,测量标志线处的牙槽嵴高度、宽度、截面积,用Tokuyama Rebase FastⅡ硬衬材料对患者下半口义齿进行直接法重衬。重衬7d后,进行修复效果的满意度问卷调查,利用SPSS15.0软件包对测量结果与问卷调查结果进行统计学分析。结果:前磨牙处牙槽嵴条件与下半口义齿固位效果间具有显著相关性(P<0.01);牙槽嵴截面积与固位间相关性最为显著(P<0.01),其中颊侧截面积的影响大于舌侧截面积;牙槽嵴宽度与固位间存在相关关系;以牙槽嵴颊侧截面积作为主要指标,所得Logistic方程对义齿重衬后固位效果的预测准确率接近70%。结论:前磨牙处牙槽嵴丰满程度对下半口义齿重衬后固位效果影响最大,提示模型测量可用于预测全口义齿重衬后的固位效果。

PURPOSE： To evaluate the effect of relining on complete dentures by analysis of model measurement. METHODS： 15 edentulous mandibular models were fabricated by close mouth impression,these models were marked and cut at 5 different positions, the alveolar height, width and sectional area were measured, then direct relining was performed on these patients＇ lower denture （Tokuyama Rebase Fast 11 ）. The cases were followed up for 7 days. Satisfaction questionnaire was used to evaluate the effect before and after relining. The results of relationship between alveolar ridge and effect of relining on complete dentures were analyzed with SPSS15.0 software package. RESULTS： There was significant correlation between the retention of lower complete dentures and the ridge form of alveolar at premolar area （P〈 0.01）; The sectional area of alveolar ridge had the most significant correlation with the level of retention （P〈0.01）, and the effect of buccal side was more significant than that of lingual side. There was a correlation between the width of the alveolar ridge and retention; The buccal sectional area appeared to be more effective prognostic aid to retention. The logistic equation derived from model measurement could be used to predict the effectiveness of complete denture relining with an accuracy rate approaching 70%. CONCLUSIONS： The dimensions of alveolar ridge at premolar area is most correlative with the retention of lower dentures after relining. Model measurement can be used as an accurate method to predict the effectiveness of relining for patients wearing complete dentures.