Clinical and Radiographic Evaluation of Zirconia Bars for Mandibular Implant Overdentures: A Prospective Cohort Study With up to 3 Years of Follow-Up

IF 4 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Clinical Implant Dentistry and Related Research Pub Date : 2025-07-25 DOI:10.1111/cid.70066

Pedro Molinero-Mourelle, Manrique Fonseca, Marc Emmanuel Grossen, Anina N. Zuercher, Martin Schimmel, Joannis Katsoulis

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引用次数: 0

Abstract

Purpose

To assess the clinical and radiographic outcomes of computer-aided design–computer-assisted manufacturing (CAD-CAM) zirconia bars supporting mandibular implant overdentures (IODs) up to a follow-up period of 3 years.

Materials and Methods

A prospective cohort observational single-center study involving 30 edentulous patients rehabilitated with two dental implants (Ø4.3 × 10 mm) at the crestal bone level and an IOD supported by a zirconia bar with distal extensions (maximum length 10.6 mm). At the 1- and 3-year follow-up, implant, prosthetic survival, marginal bone level (MBL) changes, biological, and technical complications were recorded.

Results

A total of 25 patients were assessed at the 12-month (dropout of 19.4%), and 14 patients completed the 36- month follow-up (dropout of 54.8%). Implant survival and success rates were both 100%, while prosthetic survival was 100% with a success rate of 96%. No biological complications were observed during the follow-up period; however, one patient exhibited generalized mucosal hyperplasia around the zirconia bar at the 12-month evaluation. No prosthetic prosthodontic maintenance needs were reported. A mean marginal MBL of −1.28 mm (SD ± 0.37) was recorded at the initial 12-month follow-up, and − 1.32 mm (SD ± 0.32) at the 36-month follow-up. The difference in MBL between the two time points was not statistically significant (p = 0.529).

Conclusion

Zirconia bars with distal extensions for mandibular IODs appear to be a reliable treatment option for the rehabilitation of edentulous patients, demonstrating favorable clinical outcomes up to 3 years of follow-up. A 100% implant and prosthetic survival rate was achieved, along with stable MBLs.

Clinicaltrials.gov identifier: NCT06471881.

查看原文本刊更多论文

二氧化锆条用于下颌种植覆盖义齿的临床和影像学评价：一项长达3年随访的前瞻性队列研究

目的评价计算机辅助设计-计算机辅助制造（CAD-CAM）氧化锆条支撑下颌种植覆盖义齿（iod）的临床和影像学结果，随访3年。材料与方法一项前瞻性队列观察性单中心研究，纳入30名无牙患者，采用两颗牙种植体（Ø4.3 × 10 mm）在嵴骨水平和由远端延伸（最大长度10.6 mm）的氧化锆棒支撑的IOD进行康复。在1年和3年的随访中，记录了种植体、假体存活率、边缘骨水平（MBL）变化、生物学和技术并发症。结果12个月随访25例，中途退学率19.4%，36个月随访14例，中途退学率54.8%。种植体成活率和成功率均为100%，假体成活率为100%，成功率为96%。随访期间未见生物学并发症；然而，在12个月的评估中，一名患者表现出氧化锆棒周围的全身性粘膜增生。无义肢修复维护需求报告。在最初12个月的随访中，平均边缘MBL为- 1.28 mm (SD±0.37)，在36个月的随访中为- 1.32 mm （SD±0.32）。两个时间点MBL差异无统计学意义（p = 0.529）。结论氧化锆棒带远端延伸用于下颌iod是无牙患者康复的可靠治疗选择，随访3年临床效果良好。种植体和假体的存活率达到100%，MBLs稳定。Clinicaltrials.gov识别码：NCT06471881。

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来源期刊

Clinical Implant Dentistry and Related Research 医学-牙科与口腔外科

CiteScore

6.00

自引率

13.90%

发文量

103

审稿时长

4-8 weeks

期刊介绍： The goal of Clinical Implant Dentistry and Related Research is to advance the scientific and technical aspects relating to dental implants and related scientific subjects. Dissemination of new and evolving information related to dental implants and the related science is the primary goal of our journal. The range of topics covered by the journals will include but be not limited to: New scientific developments relating to bone Implant surfaces and their relationship to the surrounding tissues Computer aided implant designs Computer aided prosthetic designs Immediate implant loading Immediate implant placement Materials relating to bone induction and conduction New surgical methods relating to implant placement New materials and methods relating to implant restorations Methods for determining implant stability A primary focus of the journal is publication of evidenced based articles evaluating to new dental implants, techniques and multicenter studies evaluating these treatments. In addition basic science research relating to wound healing and osseointegration will be an important focus for the journal.