Monolithic Zirconia Single Tooth Implant-supported Restorations With CAD/CAM Titanium Abutments in the Posterior Region: A 5-year Prospective Case Series Study
试验速览
- 阶段
- 不适用
- 状态
- Enrolling By Invitation
- 入组人数
- 50
- 试验地点
- 1
- 主要终点
- Change in peri-implant marginal bone level (in millimetres)
研究概览
简要总结
- Background There is a growing interest in restoring function in the posterior maxilla and mandible with dental implants. Next to this, these implants must be restored with crowns which are subject to minimal complications. Companies have introduced the option of screw-retaining and zirconia as crown material. The combination of posterior implants and screw-retained zirconia crowns are widely used, but prospective research on clinical performance and patient centered outcomes are scarce. Even more, 5-years data are lacking.
- Main research question To evaluate the clinical performance of Astra Tech Implants EV and Atlantis CustomBase Abutments with full-contour zirconia Atlantis Crowns in the posterior maxilla and mandible. The primary objective of the study is marginal bone level changes by radiological assessments at 5-years follow-up. Secondary objectives are implant and restoration survival, condition of peri- implant mucosa and patients' satisfaction.
- Design (including population, confounders/outcomes) The study design is an observational study of a group of patients which were treated 5 years ago with a dental implant and a screw-retained implant-supported zirconia restoration because of a missing tooth in the posterior region. Outcomes: primary outcome is the change in marginal peri-implant bone level 5 years after placing the definitive restoration. Secondary outcome measures will be implant and restoration survival, peri-implant mucosa health and patients' satisfaction using a questionnaire.
详细描述
• Introduction and rationale Nowadays, the use of dental implants for oral rehabilitation is a generally accepted treatment modality. During the first years of implant dentistry, dental implants were used mainly for the restoration of edentulous mandibles with implant-supported prostheses. Yet, there is a shift towards the application of dental implants for single-tooth replacements, supported by long-term studies reporting excellent survival rates. Not only in the aesthetic region, but also in the posterior maxilla and mandible there is a growing interest in restoring function. Dental implants show a good performance in the posterior region; in recent years attention has been shifted towards a better initial stability to reduce treatment time. Next to this, implants must be restored with crowns which are subject to minimal complications. Specially for the posterior region, companies have introduced the option of screw-retaining and zirconia as crown material, of which less technical complications are mentioned. The combination of posterior implants and screw-retained zirconia crowns are widely used, but prospective research on clinical performance and patient centered outcomes are scarce and 5-years results are lacking.
RESEARCH QUESTION To evaluate the clinical performance of Astra Tech Implants EV and Atlantis CustomBase Abutments with full-contour zirconia Atlantis Crowns in the posterior maxilla and mandible after a 5-years follow-up.
STUDY DESIGN The study design is an observational study of a group of 50 patients which were treated 5 years ago with a dental implant and a screw-retained implant-supported zirconia restoration because of a missing tooth in the posterior region.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patients referred to the department of Oral and Maxillofacial Surgery 5 years ago and treated with a dental implant and a screw-retained implant-supported zirconia restoration because of having a missing tooth in the posterior region. At the time of treatment:
- •The patient was 18 years or older;
- •The missing tooth was a premolar or molar in maxilla or mandible;
- •Sufficient healthy and vital bone to insert a dental implant with a minimum length of 8 mm and at least 4.2 mm in diameter with initial stability > 45 Ncm
- •The implant site was free from infection;
- •Adequate oral hygiene (modified plaque index and modified sulcus bleeding index ≤ 1);
- •Sufficient mesio-distal, bucco-lingual, and interocclusal space for placement of an anatomic restoration;
- •The patient was capable of understanding and giving informed consent.
排除标准
- •Medical and general contraindications for the surgical procedures;
- •Presence of an active and uncontrolled periodontal disease;
- •A history of local radiotherapy to the head and neck region.
结局指标
主要结局
Change in peri-implant marginal bone level (in millimetres)
时间窗: 5 years
Difference in peri-implant bone level measured in millimetres
次要结局
- Implant survival and restoration survival (in percentage)(5 years)
研究者
H.J.A. Meijer (Henny)
Prof dr
University Medical Center Groningen