Effect of Geometric Modifications of Implant Scan Bodies Compared to Conventional Transfer Techniques on Passivity of Mandibular All on Four Restorations
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 18
- 试验地点
- 2
- 主要终点
- passivity of the prosthesis
研究概览
简要总结
The aim of this clinical study will be the effect of geometric modifications of implant scan bodies compared to conventional transfer techniques on passivity of all on four mandibular restorations
详细描述
The aim of this study will be the effect of geometric modifications of implant scan bodies compared to conventional transfer techniques on passivity of all on four mandibular restorations.
Evaluation method:
The trueness of the final impression and the passivity of the final prosthesis will be evaluated by two methods:
Invitro evaluation For each patient in every group, the standard tessellation language (STL) files of scanned impressions will be superimposed on the reference file to determine the 3D surface, linear, and angular position analysis.
The STL files for both frameworks will be superimposed on the reference file to determine the passivity.
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
- Single (Participant)
入排标准
- 年龄范围
- 45 Years 至 70 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •All selected patients will have four implants placed in the mandibular interforaminal region according to all -on -four concept.
- •All selected patients have a healthy mucosa and with no clinical complications.
- •All patients are cooperative and approve the proposed treatment protocol.
排除标准
- •Patients who reject to participate in the study.
- •Patients who need implant placement as a result of previous implant failure.
研究组 & 干预措施
• Group I (control group)
Final impression will be done by conventional one-step impression technique. For the same patient, another final impression using unmodified scan bodies will be done by direct intraoral scan technique.
干预措施: Implant supported hybrid prosthesis (Device)
• Group II (Test Group)
Final impression will be done by conventional one-step impression technique. For the same patient another final impression using subtractive modified scan bodies will be done by direct intraoral scan technique
干预措施: Implant supported hybrid prosthesis (Device)
结局指标
主要结局
passivity of the prosthesis
时间窗: one year
Radiographic evaluation using long cone parallel technique will be done for the framework
trueness of final impressions
时间窗: one year
For each patient in every group, the standard tessellation language (STL) files of scanned impressions will be superimposed on the reference file to determine the 3D surface, linear, and angular position analysis
次要结局
- patient satisfaction(one year)