Prefabricated shouldered abutments enable successful restoration of molar crowns on implants

IF 3.7 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Clinical Implant Dentistry and Related Research Pub Date : 2024-02-15 DOI:10.1111/cid.13308

Yu-Chi Cheng BS, Paolo Perpetuini, Mauro Marincola DDS, Drauseo Speratti DMD, Laura Murcko DMD, Muneki Hirayama DMD, Ernesto B. Benalcázar-Jalkh PhD, DDS, Estevam A. Bonfante PhD, DDS

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Abstract

Purpose

This retrospective study evaluated the effect of selected clinical and patient factors on survival, success, and peri-implant bone level changes of locking taper implants supporting molar crowns on Bicon's prefabricated shouldered abutments.

Methods

A total of 234 patients, who received 274 single molar crowns supported by locking taper implants were included in this retrospective study. Kaplan–Meier survival analysis was used to assess overall implant survival, prostheses survival, and success. Crowns were either monolithic (resin based) or bilayered (milled fiber-reinforced composite coping veneered with indirect composite). Early and late changes in marginal bone levels were plotted and analyzed with equivalence testing to compare the effects of different factors on crestal bone levels.

Results

At 9.5 years after implant surgery, the implant survival probability was 94.2%, the probability of prosthesis survival was 91.4%, and the probability of prosthetic success was 90.4%. Neither the use of different crown materials, nor the choice of monolithic versus bilayered crown construction, significantly affected the probability of prosthetic success. Marginal bone levels, on average, trended downwards towards the top of the implant within the first 2 years after functional loading, and remained stable on average, since then. Factors affecting bone levels included the use of nonsteroidal anti-inflammatory drugs, which precluded early implant bone loss; and subcrestal implant placement, which was linked to significantly higher long-term bone levels.

Conclusion

The implant and abutment system studied resulted in high implant and prosthetic survival rates, regardless of prosthetic material used, with stable bone levels over time.

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预制的带肩基台可成功修复种植体上的磨牙冠。

目的：这项回顾性研究评估了选定的临床和患者因素对使用 Bicon 预制肩台支撑磨牙冠的锁定锥形种植体的存活率、成功率和种植体周围骨水平变化的影响：这项回顾性研究共纳入了 234 名患者，他们接受了 274 个由锁定锥形种植体支撑的单磨牙冠。采用卡普兰-梅尔生存分析法评估种植体的总生存率、修复体的生存率和成功率。修复体为单层（树脂基底）或双层（铣削纤维增强复合材料与间接复合材料贴面）。对边缘骨水平的早期和晚期变化进行绘图，并通过等效测试进行分析，以比较不同因素对骨嵴水平的影响：种植手术后 9.5 年，种植体存活率为 94.2%，修复体存活率为 91.4%，修复成功率为 90.4%。无论是使用不同的牙冠材料，还是选择单层或双层牙冠结构，都不会对修复成功率产生明显影响。在功能负荷后的头两年内，边缘骨量平均呈向种植体顶部下降的趋势，此后平均保持稳定。影响骨量的因素包括：使用非甾体类抗炎药物，这可以避免早期种植体骨量的流失；以及种植体放置在胸骨下，这与长期骨量显著增加有关：结论：所研究的种植体和基台系统具有较高的种植体和修复体存活率，无论使用的修复体材料如何，长期骨量都很稳定。

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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.