Abstract：
BACKGROUND: Evaluation of a new vertical dimension of occlusion (VDO) in complex restorative treatments is considered a necessary step prior to placement of restorations.
OBJECTIVE: This randomised controlled trial (RCT) aimed to assess the effects of using an evaluation of a VDO increase before restorative treatment in patients with moderate-to-severe tooth wear, on OHRQoL, freeway space (FWS) and interventions to restorations.
METHODS: Forty-two patients with tooth wear were included and randomly allocated to either a test phase with a Removable Appliance (RA) or no test phase. Restorative treatment consisted of restoration of all teeth using composite restorations in an increased VDO. OHIP-score, freeway space (FWS) and clinical acceptability of restorations were assessed at baseline and at recall appointments (1 month and 1 year). Intervention to restoration was scored in case of material chipping or when the abutment tooth had increased sensitivity that could be linked to occlusal overloading. ANCOVA analyses, Univariate Cox regression, t-tests and descriptive analyses were performed (p < .05).
RESULTS: Clinical follow-up after 1 year was completed for 41 patients. No significant effect of testing the VDO with a RA could be found on the OHIP-score (p = .14). Reduction of FWS in the RA group, compared to the control group, was significantly lower at 1 year (p = .01, 95% CI -1.09 to -0.15). No effect on early interventions to restorations was found (p = .94).
CONCLUSIONS: This RCT showed that a removable appliance is not indicated to functionally test the increased VDO prior to restorative treatment in patients with tooth wear.
OBJECTIVE: This randomised controlled trial (RCT) aimed to assess the effects of using an evaluation of a VDO increase before restorative treatment in patients with moderate-to-severe tooth wear, on OHRQoL, freeway space (FWS) and interventions to restorations.
METHODS: Forty-two patients with tooth wear were included and randomly allocated to either a test phase with a Removable Appliance (RA) or no test phase. Restorative treatment consisted of restoration of all teeth using composite restorations in an increased VDO. OHIP-score, freeway space (FWS) and clinical acceptability of restorations were assessed at baseline and at recall appointments (1 month and 1 year). Intervention to restoration was scored in case of material chipping or when the abutment tooth had increased sensitivity that could be linked to occlusal overloading. ANCOVA analyses, Univariate Cox regression, t-tests and descriptive analyses were performed (p < .05).
RESULTS: Clinical follow-up after 1 year was completed for 41 patients. No significant effect of testing the VDO with a RA could be found on the OHIP-score (p = .14). Reduction of FWS in the RA group, compared to the control group, was significantly lower at 1 year (p = .01, 95% CI -1.09 to -0.15). No effect on early interventions to restorations was found (p = .94).
CONCLUSIONS: This RCT showed that a removable appliance is not indicated to functionally test the increased VDO prior to restorative treatment in patients with tooth wear.
摘要：
背景：在复杂的修复治疗中评估新的垂直闭塞尺寸（VDO）被认为是放置修复体之前的必要步骤。
目的：这项随机对照试验（RCT）旨在评估中度至重度牙齿磨损患者在修复治疗前使用VDO升高评估的效果。关于OHRQoL，高速公路空间(FWS)和修复措施。
方法：纳入42例牙齿磨损患者，并随机分配到使用可移动矫正器（RA）的测试阶段或无测试阶段。恢复性治疗包括使用VDO增加的复合修复体修复所有牙齿。OHIP-score,高速公路空间(FWS)在基线和召回预约时(1个月和1年)评估修复体的临床可接受性.在材料碎裂或基牙敏感性增加的情况下，对修复的干预进行评分，这可能与咬合过载有关。ANCOVA分析，单变量Cox回归，t检验,并进行描述性分析（p<0.05）。
结果：41例患者在1年后完成临床随访。用RA测试VDO对OHIP评分没有显著影响(p=0.14)。RA组FWS减少，与对照组相比，在1年时显著降低(p=0.01，95CI-1.09至-0.15)。对修复的早期干预没有影响(p=0.94)。
结论：该RCT显示，在牙齿磨损患者的修复治疗之前，不需要使用可移除的矫正器对增加的VDO进行功能测试。
目的：这项随机对照试验（RCT）旨在评估中度至重度牙齿磨损患者在修复治疗前使用VDO升高评估的效果。关于OHRQoL，高速公路空间(FWS)和修复措施。
方法：纳入42例牙齿磨损患者，并随机分配到使用可移动矫正器（RA）的测试阶段或无测试阶段。恢复性治疗包括使用VDO增加的复合修复体修复所有牙齿。OHIP-score,高速公路空间(FWS)在基线和召回预约时(1个月和1年)评估修复体的临床可接受性.在材料碎裂或基牙敏感性增加的情况下，对修复的干预进行评分，这可能与咬合过载有关。ANCOVA分析，单变量Cox回归，t检验,并进行描述性分析（p<0.05）。
结果：41例患者在1年后完成临床随访。用RA测试VDO对OHIP评分没有显著影响(p=0.14)。RA组FWS减少，与对照组相比，在1年时显著降低(p=0.01，95CI-1.09至-0.15)。对修复的早期干预没有影响(p=0.94)。
结论：该RCT显示，在牙齿磨损患者的修复治疗之前，不需要使用可移除的矫正器对增加的VDO进行功能测试。
