"Assessment of Occlusal Veneer Restorations Performance in Posterior Teeth Under Various Simulated Loading Conditions." (A 3D Finite Element Analysis Study)
试验速览
- 阶段
- 不适用
- 状态
- 进行中（未招募）
- 入组人数
- 8
- 试验地点
- 1
- 主要终点
- Clinical assessment
研究概览
简要总结
The aim of the research is to study the mechanical behavior and clinical performance of veneers in posterior teeth. Clinical assessment and experimentation of two types of occlusal veneers will be conducted to evaluate their behavior.
详细描述
Occlusal veneers are restorations that restore the occlusal surface without axial wall involvement, allowing restoration of form, function, and esthetics of compromised or destroyed occlusal tooth structure in a conservative way as part of their treatment plan and the restorative process. The performance of occlusal veneer restorations is of paramount importance, as it determines the outcome and behavior of the final restoration. No ideal study has been conducted to evaluate teeth restored with occlusal veneer restorations. Evaluation must include all aspects of clinical performance, as some of the materials used in their fabrication have not been fully studied and should be studied to evaluate their clinical behavior using modified USPHS (United States Public Health Service) criteria. Which includes surface texture, anatomical form/wear, marginal integrity, marginal discoloration, secondary caries, color match and post-operative hypersensitivity.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Treatment
- 盲法
- Single (Outcomes Assessor)
入排标准
- 年龄范围
- 25 Years 至 35 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Normal occlusion
- •25-35 years old
- •Males or females having class II cavities indicated for occlusal veneers
排除标准
- •Parafunctional habits
- •Abnormal occlusion
- •Extremely high caries risk patients
- •Temporomandibular problems
研究组 & 干预措施
Direct occlusal veneer ( Occlusal Veneer of Composite resin)
Split-mouth design, (right/left posterior tooth) will be restored with an occlusal veneer composite resin (Direct occlusal veneer). Directly fabricated occlusal veneers are a conservative approach, however, it requires a great skill from the operator to assure good margins and occlusal anatomy. Direct veneers are fabricated from composite resin and can be finished in a single visit, but longer chair time is required, in addition to the low wear resistance compared to ceramics. However, direct occlusal veneers have the benefit of resiliency close to that of natural dental tissue.
干预措施: Direct occlusal veneer ( Occlusal Veneer of Composite resin) (Procedure)
Indirect occlusal veneer (Occlusal veneer of lithium disilicate)
Split-mouth design, (right/left posterior tooth) will be restored with an Indirect occlusal veneer (Occlusal veneer of lithium disilicate). Indirectly fabricated occlusal veneers of lithium disilicate allow better control and design of the occlusal anatomy and proximal contacts, in addition to possessing better mechanical properties and fracture strength when compared to direct occlusal veneers. However, indirect occlusal veneers are lab fabricated, consequently, more clinical visits are required.
干预措施: Indirect occlusal veneer (Occlusal veneer of lithium disilicate) (Procedure)
结局指标
主要结局
Clinical assessment
时间窗: 1 year follow up
Clinical performance of each direct \& indirect occlusal veneer using modified USPHS (United States Public Health Service) criteria. Each criterion will be graded as either Alpha, Bravo and Charlie. * Surface texture: aplha: smooth as surrounding enamel, beta: rougher than enamel, charlie: very rough * Anatomical wear; alpha: Restoration is continuous with existing tooth anatomy, bravo: Restoration is slightly discontinuous, charlie: restoration is discontinuous. * Marginal integrity: alpha: Closely adapted, beta: Visible crevice,, charlie Crevice in which dentin is exposed. * Marginal discoloration: alpha: No discoloration, bravo: Superficial staining , charlie: Deep staining. * Secondary caries: aplha: no caries, charlie: caries present. * Color match: aplha:No mismatch between restoration and tooth. bravo: Slight mismatch, charlie: unacceptable mismatch The clinical performance will be evaluated by blinded evaluators, the data will be collected in a table for analysis.
次要结局
未报告次要终点