Marginal Bone Loss and Retention of Four-Implant Locator-Retained Mandibular Overdentures: 7 Years Follow up
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 27
- 试验地点
- 1
- 主要终点
- Marginal Bone Loss
研究概览
简要总结
ABSTRACT Statement of the problem: Insufficient long-term retrospective data is evaluating marginal bone loss and retention of four-implant Locator-retained mandibular overdentures.
Purpose: To assess marginal bone loss and retention of four-implant Locator-retained mandibular overdentures over seven years at the time of overdenture insertion (T0), 1 year (T1), and 7 years (T7) after insertion.
Material and methods: This retrospective study included 27 completely edentulous patients with maxillary single denture, and four parallel implants were placed interforaminal, and they already have a mandibular four-implant retained overdenture with LOCATOR attachments.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patients rehabilitated with a mandibular overdenture retained by four dental implants.
- •Four implants positioned in the anterior and premolar regions of the mandible. Four Locator attachments used to retain the mandibular overdenture. Availability of baseline clinical and radiographic records at the time of prosthesis insertion.
- •Availability of clinical and radiographic records at 1-year and 7-year follow-up.
排除标准
- •Patients with incomplete clinical or radiographic records. Patients without the required 1-year or 7-year follow-up records. Patients with radiographs that were inadequate for reliable assessment of peri-implant marginal bone levels.
- •Patients whose records did not allow assessment of prosthetic retention at the specified follow-up periods.
研究组 & 干预措施
Implant-Retained Overdenture Group
干预措施: four dental implant with locator attachment (Device)
Implant-Retained Overdenture Group
干预措施: implant retained overdenture (Other)
结局指标
主要结局
Marginal Bone Loss
时间窗: From the time of implant loading (Baseline) up to 7 years.
Marginal Bone Loss by periapical radiography
时间窗: From the time of implant loading (Baseline), 1year and 7 years.
Marginal bone loss will be assessed using standardized intraoral periapical radiographs. The vertical distance from the implant reference point to the alveolar bone crest will be measured on the mesial and distal surfaces of each implant. Measurements will be recorded at implant insertion (baseline), 1 year, and 7 years, and the mean value of the four implants will be calculated for each patient.
次要结局
- Prosthetic Retention(7 years.)
- Prosthetic Retention by a digital force gauge(baseline, 1year and 7 years.)