A Single-centre Randomised Controlled Clinical Trial of Zirconia-based Versus Metal-based Adhesive Bridges for Replacing 2 Missing Teeth or Less in Adults.
试验速览
- 阶段
- 不适用
- 状态
- 撤回
- 试验地点
- 2
- 主要终点
- Clinical survival of adhesive bridges
研究概览
简要总结
Adhesive bridges are becoming popular in patients with congenitally missing teeth and these are type of bridges that can be done with only minimal or with no preparation to replace the missing tooth/teeth. The best clinical gain is the minimal tooth preparation or no need for the removal of tooth substance. Treatment for this type of bridges does not usually require anaesthesia. In addition, adhesive bridges can provide reasonable aesthetical outcome with minimal cost and reduced chair time.
The biggest issue is that high failure rate in the long term, and gray colour shining through the metal wing cemented onto the abutment tooth. This can compromise the aesthetical outcome. The aesthetical problem can be solved by the use of zirconia all ceramic material to construct the bridge.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 80 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Male or female ≥ 18 years of age
- •Has a maximum of 2 units requiring placement
- •Is a regular dental attendee and agree to return for assessments
- •Written subject informed consent (IC) for this protocol will be obtained prior to study enrolment. Each subject will be required to sign and date the IC form prior to their participation
- •Sound or minimally restored abutment(s)
排除标准
- •The presence of any periodontal pocket depths equal or above 4 mm with active periodontal disease
- •Any history of adverse reaction to clinical materials to be used in this study
- •They are pregnant or had serious medical condition that may interfere with the dental treatment
- •Acquired tooth loss more than 2 units requiring replacement
- •Participants who have parafunctional habits
- •Severe Class II Div II cases
结局指标
主要结局
Clinical survival of adhesive bridges
时间窗: 5 Years
Evaluation of clinical survival: participants will be evaluated according to the modified USPHS criteria. The evaluation criteria will include: retention, framework fracture, veneering fracture, marginal adaptation, recurrent caries and colour match. The examination will be after one to two weeks, after 3, 6, 9, 12 and 18 months, 2, 3, 4 and 5 years. The evaluation will also include the biological complication. Plaque, gingival index, periodontal probing depth and gingival recession will be evaluated around the abutments and compared to a control tooth
次要结局
- Marginal discrepancy evaluation.(After cementation)
- Economic evaluation(5 years)
- Quality of life, aesthetic outcome.(18 months)