Periimplant Bone Changes in Different Abutment Heights and Insertion Timing in Posterior Mandibular Areas: Results From a Randomized Prospective Clinical Trial
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 试验地点
- 2
- 主要终点
- Marginal bone changes
研究概览
简要总结
The aim of this study was to compare the influence of the abutment height and insertion timing on early marginal bone loss (MBL) in posterior mandibular partial implant-supported restorations.
Material and methods: The study was planned as a prospective, randomized, controlled parallel group including subjects in need of two implants for the restoration of an edentulous posterior mandibular area. Data were gathered on age, gender, attached gingiva height, bleeding on probing (BoP), smoking habits and previous periodontitis. The patients were allocated into three groups: Group A implants were immediately connected to 2 mm height abutments; Group B implants were immediately connected to 1 mm height abutments; Group C implants were left to heal in a sub-mucosal position and 2 mm abutments were inserted in a second stage surgery. Peri-apical radiographs were taken at the implant surgery (baseline), 4 weeks after surgery (T1), 16 weeks after implant placement at the final restoration delivery (T2) and 1-year after implant placement (T3).
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
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
- •patients age > 18 years;
- •American Society of Anaesthesiologists (ASA) status I;
- •no systemic medication or condition known to potentially alter bone metabolism; - absense of acute periodontal condition.
排除标准
- •lack of primary stability at implant surgery;
- •need for bone regeneration procedures during surgery;
- •inability to correct place the implant in accordance with the prosthetic requirements.
结局指标
主要结局
Marginal bone changes
时间窗: 60 months
Crestal bone changes that occur around the dental implant
次要结局
未报告次要终点
研究者
Tiago Borges
Professor
Universidade Católica Portuguesa