Survival of Cast Restorations - Restorations Made of Precious Metal vs. Non-precious Metal
试验速览
- 阶段
- 不适用
- 状态
- Enrolling By Invitation
- 发起方
- 入组人数
- 4,000
- 试验地点
- 1
- 主要终点
- Success of restoration
研究概览
简要总结
The aim of this study is to determine and compare the longevity of single-tooth cast restorations made of precious metal vs. non-precious metal (e.g. partial crowns, crowns) and to determine the influence of patient-, tooth-, treatment-, and restoration-specific parameters on longevity.
Patients who received single-tooth cast restorations made of precious metal or non-precious metal (e.g. partial crowns, crowns) between 1997 and 2022 will be retrospectively analyzed. Patient-, tooth-, treatment-, and restoration-specific parameters will be obtained from digital and paper-based dental records.
Survival and success of the restorations will be assessed using Kaplan-Meier statistics. Mean annual failure rates (mAFR) and median survival time will be calculated (Kaplan-Meier statistics). Potential predictive factors will be tested using log-rank tests and multi-variate Cox-regression analysis.
详细描述
No patient treatment is associated with the study.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Retrospective
入排标准
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patients insured in the statutory health insurance.
- •Patients who received single-tooth cast restorations made of precious metal or non-precious metal (e.g. partial crowns, crowns) within the Department of Preventive Dentistry, Periodontology and Cariology between 1997 and 2022.
排除标准
- 未提供
结局指标
主要结局
Success of restoration
时间窗: 1997-2023
Success is defined as the time-interval without a subsequent re-intervention of the restoration or extraction of the tooth.
次要结局
- Survival of restoration(1997-2023)
研究者
Philipp Kanzow, PD Dr. med. dent., Dr. rer. medic.
Senior Lecturer
University Medical Center Goettingen