Randomized Clinical Trial of Light Cured Luting Agents on Laminate Veneers
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 11
- 试验地点
- 2
- 主要终点
- Optical Properties of Laminate Veneers
研究概览
简要总结
The aim of this randomized clinical trial is to evaluate the influence of luting agent, thickness and color of laminate veneers (LVs) and color of dental substrate on the optical properties of LVs.
详细描述
The following date will be collected (i) the color of dental substrate obtained before and after dental preparation, (ii) the thickness and color of the LVs obtained before of the cementation procedures on white and black value background, (iii) and the final color of the LVs bonded to dental substrates obtained after cementation. For LVs cementation two cements will be used, the light-cured resin cement and the flowable composite, which will be randomly divided into two groups (n=31). The color of LVs will be performed with visual evaluation based on Vita and 3D Master scales and with a spectrophotometer Vita Easyshade (Vita Zahnfabrik / Bad Saeckingen, Germany) based on CIEL*a* b system. Data collected will be evaluated for translucency parameter (TP) and color variation (ΔE) according to luting agent, thickness and color of the LVs as well as color of dental substrate. Additionally, the color obtained with visual evaluation and with spectrophotometer will be compared to evaluate the level of agreement between the color observed by the operator and the color named by the spectrophotometer.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Single (Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Minimum 18 years of age
- •Patients with diastema
- •Conoid teeth
- •Misaligned anterior teeth
- •Discolored teeth and/or teeth with erosion/abrasion
- •Posterior occlusal stability
- •Individuals who are willing to attend the clinics on predetermined days, to agree to sign the consent form and clarified, after receiving information about the study objectives, risks and benefits associated with the procedures.
排除标准
- •Patients with extensive loss of tooth structure
- •Subjects suffering from temporomandibular disorders, neurological and oral mucosa diseases
- •Inadequate oral hygiene or periodontal problems
结局指标
主要结局
Optical Properties of Laminate Veneers
时间窗: after luting the laminate veneers (at least 1 hours after cementation)
The color of laminate veneers will be performed with a spectrophotometer Vita Easyshade (Vita Zahnfabrik / Bad Saeckingen, Germany) based on Vita and 3D Master scales and on CIEL\*a\* b system. Data collected will be evaluated for translucency parameter (TP) and color difference (ΔE) according the thickness and color of the laminate veneers as well as color of dental substrate. The acceptable threshold color difference for the CIEDE2000 method is 1.8 (Paravina et al, 2015). Greater color variation is desirable when a shade match between darker and lighter adjacent tooth substrates is required and values above the clinical thresholds for acceptability of color differences indicating lower masking ability of the material. "Level of Agreement Between the Color Observed by the Operator and the Color Named by the Spectrophotometer" was included as a Primary or Secondary Outcome Measure, but data was not collected.
次要结局
未报告次要终点
研究者
Noéli Boscato, PhD
Adjunct Professor
Federal University of Pelotas