Treatment With Fixture Microthread™ in Patients With Poor Bone Quality and no Teeth in the Upper Jaw, When Using Two-Stage Surgery
An Open, Prospective, Multicenter Study to Evaluate Treatment of Edentulous Upper Jaws With an Implant-Supported Prosthesis Retained by Astra Tech Dental Implants, Fixture Micro-Macro in Patients With Poor Bone Quality
The primary objective of the study is to evaluate the long-term survival rate of individual implants and prostheses when treating edentulous upper jaws of poor bone quality with Fixture MicroThread™ (Micro-Macro).
Clinical study recruitment was stopped in year 2000 due to a decision to modify the product under study. This was a result of feedback regarding the subjective feeling during the installation procedure. There were no safety concerns w/r to the study products. Patients already included and treated in the study were monitored for the full duration of the study in accordance with the clinical study protocol.
研究概览
研究类型
注册 (实际的)
阶段
- 不适用
联系人和位置
参与标准
资格标准
适合学习的年龄
接受健康志愿者
有资格学习的性别
描述
Inclusion Criteria:
- 18 - 75 years of age
- Bone quality class III or IV, (according to Lekholm & Zarb16)
- Willing to give signed informed consent
Exclusion Criteria:
- Need for bone augmentation of the maxilla
- Tobacco smoking more than 5 cigarettes/day
- Any systemic disease or condition that would compromise post-operative healing and/or osseointegration
- Systemic corticosteroids or any other medication that would compromise post-operative healing and/or osseointegration
- Unable or unwilling to return for follow-up visits
- Bruxism or other parafunctional activity
学习计划
研究是如何设计的？
设计细节
- 主要用途：治疗
- 分配：不适用
- 介入模型：单组作业
- 屏蔽：无（打开标签）
武器和干预
参与者组/臂 |
干预/治疗 |
|---|---|
|
实验性的：一个
|
Fixture MicroThread (Micro-Macro) Ø 3.5 and 4.0 mm in lengths of 9, 11, 13, 15 and 17 mm.
|
研究衡量的是什么？
主要结果指标
结果测量 |
大体时间 |
|---|---|
|
Implant survival
大体时间：Continuously during 5,5 years after implant placement
|
Continuously during 5,5 years after implant placement
|
合作者和调查者
调查人员
- 首席研究员：Clark Stanford, D.D.S., Ph.D.、University of Iowa, College of Dentistry, Dow's Institute for Dental Research
研究记录日期
研究主要日期
学习开始
初级完成 (实际的)
研究注册日期
首次提交
首先提交符合 QC 标准的
首次发布 (估计)
研究记录更新
最后更新发布 (估计)
上次提交的符合 QC 标准的更新
最后验证
更多信息
此信息直接从 clinicaltrials.gov 网站检索，没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求，请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改，我们的网站上也会自动更新.