The Clinical Performance of Inlay Zirconia Bridges Using Three Different Designs
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 30
- 试验地点
- 2
- 主要终点
- Change in marginal fit
研究概览
简要总结
When missing tooth structure or teeth are replaced, minimal biologic risk should be involved to re-establish function and esthetics. The increased use of the adhesive technique and preservation of dental tissues have greatly impacted conservative tooth preparation design. The development use of zirconia technology and all-ceramic systems has opened the potential for fabrication inlays zirconia bridges with durability and good aesthetics.
The purpose of this study is to clinically evaluate the placement of inlay bridge made of a Y-TZP framework veneered with a pressed ceramic and bonded with a completely adhesive approach in the replacement of a single missing tooth.
详细描述
This study evaluates the use of inlay bridge made of Zirconia and all ceramic systems with three designs in the replacement process of one single tooth (i.e. a missing premolar or molar.) The first design is going to be fabricated with CAD/CAM Zirconia and the occlusal surface from e-max press.
The second design is going to be fabricated with CAD/CAM Zirconia and the occlusal surface from e-max press and the internal surface coated with glaze layer to improve the adhesion.
The third design is going to be fabricated with CAD/CAM Zirconia and the occlusal surface from e-max press and the internal surface coated with a layer of e-max ceramic press to improve the adhesion.
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
- Triple (Participant, Care Provider, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 50 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Good oral hygiene
- •Low susceptibility to caries
- •Parallel alignment of abutment teeth
- •Immobility of the abutment teeth
- •Minimum height of abutment teeth ≥ 5 mm (connector thickness)
- •Maximum mesio-distal extension of the inter-dental gap of 9 mm (width of premolar) or 12 mm (width of molar)
排除标准
- •Severe para-functional habits.
- •Short clinical crowns (<5 mm)
- •Extensive defects of the clinical crown,
- •Loosening of teeth because of factors related to the periodontal tissues.
结局指标
主要结局
Change in marginal fit
时间窗: Immediately within five minutes following cementation (T1), 3 months (T2), 6 months (T3), 12 months (T4) following application
To examine if there is a gap between inlay margins and tooth cavity margins .It will be measured by a probe.
Change in the Retention Status
时间窗: Immediately within five minutes following cementation (T1), 3 months (T2), 6 months (T3), 12 months (T4) following application
The resistance of a prosthesis to displacement will be measured.
Change in Material Integrity
时间窗: Immediately within five minutes following cementation (T1), 3 months (T2), 6 months (T3), 12 months (T4) following application
To examine macroscopically the presence of cracks or fractures in the veneering ceramic (retainers or pontics) or any fractures at the connectors.
次要结局
- Change in Marginal Color Matching(Immediately within five minutes following cementation (T1), 3 months (T2), 6 months (T3), 12 months (T4) following application)