Evaluation of Passivity of Co-Cr Complete Arch Screw Retained Maxillary Prostheses Using Different Intraoral Scanners With the Aid of Auxiliary Geometric Device
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 7
- 试验地点
- 1
- 主要终点
- estimate the marginal gap using digital camera
研究概览
简要总结
Statement of the problem: Accurate digital scans of edentulous patients is challenging due to the absence of anatomic landmarks and geometric variations along the dental arch. Whether adding an auxiliary geometric device (AGD) will improve scanning is unclear.
Purpose: The aim of the study is to analyze the accuracy of complete-arch digital scans of completely edentulous arches by placing auxiliary geometric device.
Material and Methods: This in vivo study included patients who received complete arch screw-retained prostheses supported by 4 implants. Seven patients were randomly chosen; a dual scan protocol was performed for digital implant planning. Surgical guide and AGD were 3d printed. Three different data acquisition methods for each individual: Open tray impression digitized by extraoral scanner (EO Group), Intraoral scan by using Medit i600 with AGD (M600 Group), and Intraoral scan (CEREC Primescan; Dentsply Sirona) with AGD (PS Group). A reference model was formed to check the accuracy of these 3 data acquisitions. The framework was designed and printed for the 3 groups to be placed in the reference model to check the passivity. Passivity was tested through modified 1-screw test by measuring the marginal gap by using a digital camera (add magnification). Each framework was placed in the patient's mouth to re-check the passivity, the best one was delivered to the patient after 4 months after osteointegration of the implants.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Diagnostic
- 盲法
- Double (Participant, Outcomes Assessor)
入排标准
- 年龄范围
- 50 Years 至 70 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •For a maxillary edentulous patient, the last extraction should be at least six months
- •Non-smokers
- •50-70 years of age
- •Have good oral hygiene and motivation.
排除标准
- •Patients with major systemic diseases that may affect osseointegration
- •Uncontrolled diabetes mellitus
- •The need for extensive bone grafting in the planned implant site
- •Pregnant female patient
- •Under bisphosphonate treatment
- •Limited mouth-opening for executing the guided implant surgery.
研究组 & 干预措施
Open tray impression digitized by extraoral scanner (EO Group)
A reference model was formed to check the accuracy of these 3 data acquisitions. The framework was designed and printed for the 3 groups to be placed in the reference model to check the passivity. Passivity was tested through modified 1-screw test by measuring the marginal gap by using a digital camera (add magnification). Each framework was placed in the patient's mouth to re-check the passivity, the best one was delivered to the patient after 4 months after osteointegration of the implants.
干预措施: Open tray impression technique (Other)
Intraoral scan by using Medit i600 with AGD (M600 Group)
A reference model was formed to check the accuracy of these 3 data acquisitions. The framework was designed and printed for the 3 groups to be placed in the reference model to check the passivity. Passivity was tested through modified 1-screw test by measuring the marginal gap by using a digital camera (add magnification). Each framework was placed in the patient's mouth to re-check the passivity, the best one was delivered to the patient after 4 months after osteointegration of the implants.
干预措施: Auxiliary Geometric Device (M600) (Other)
Intraoral scan (CEREC Primescan; Dentsply Sirona) with AGD (PS Group)
A reference model was formed to check the accuracy of these 3 data acquisitions. The framework was designed and printed for the 3 groups to be placed in the reference model to check the passivity. Passivity was tested through modified 1-screw test by measuring the marginal gap by using a digital camera (add magnification). Each framework was placed in the patient's mouth to re-check the passivity, the best one was delivered to the patient after 4 months after osteointegration of the implants.
干预措施: Auxiliary Geometric Device (PS) (Other)
结局指标
主要结局
estimate the marginal gap using digital camera
时间窗: after 4 months after osteointegration of the implants
modified single screw test to check the passivity of the 3 frameworks in both the models and in the patient's mouth by radiograph
次要结局
未报告次要终点
研究者
Yasmine Hamdy Abdel-Hay Dawood
Assistant Lecturer of Oral and Maxillofacial Prosthodontics
Ain Shams University