Occlusal changes on implant-supported single crowns with one year follow-up after loading: A systematic review and meta-analysis

Zhen Mao; Hannah Bleiel; Florian Beuer; Mats Wernfried Heinrich Böse; Maren Soetebeer

doi:10.1016/j.jdent.2024.105000

Occlusal changes on implant-supported single crowns with one year follow-up after loading: A systematic review and meta-analysis

J Dent. 2024 May 10:146:105000. doi: 10.1016/j.jdent.2024.105000. Online ahead of print.

Authors

Zhen Mao¹, Hannah Bleiel², Florian Beuer², Mats Wernfried Heinrich Böse², Maren Soetebeer²

Affiliations

¹ Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Aßmannshauser Str. 4-6, 14197 Berlin, Germany. Electronic address: zhen.mao@charite.de.
² Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Aßmannshauser Str. 4-6, 14197 Berlin, Germany.

PMID: 38734300
DOI: 10.1016/j.jdent.2024.105000

Abstract

Objective: This systematic review evaluated the occlusal changes after loading with implant-supported single crowns.

Sources: An electronic literature search was conducted in PubMed, Embase and Cochrane library for randomized (RCTs) or non-randomized controlled clinical trials (CCTs), with a minimum of 10 patients.

Study selection: Studies reporting the occlusal force changes on implant-supported single crowns - with natural teeth as antagonist - measured at baseline and after loading periods were included. 4 CCTs including 133 ISCs in posterior sites were included for meta-analysis. All analyzed ISCs had no contact at a light bite and a light contact at a heavy bite in MIP at loading (baseline).

Data: The relative occlusal forces (ROFs) of each implant-supported single crown (ISC) or control tooth (CT) were extracted. ROFs were defined as percentage of the total occlusal force of the entire dentition at maximum intercuspal position (MIP). A meta-analysis was conducted to compare the ROF changes at different follow-up periods and the weighted mean differences in ROF between ISCs and CTs were pooled and analyzed. The amount of change in ROF was significantly lower in 6 to 12 months after loading comparing the follow-up period between baseline and 6 month (p < 0.05). At baseline and 3-month follow-up, CTs presented significant higher ROF than ISCs (p < 0.05), while no significant difference was found after half year following.

Conclusions: This study showed that the ROF changes significantly over time after loading of ISCs. It might prove that the occlusal concept defined at the time of prosthetic delivery changes or adapts naturally over time.

Clinical significance: The function of specific implant occlusal concept (no contact at a light bite and a light contact at a heavy bite in MIP) is limited over time and careful monitoring and occlusal adjustments should be recommendable during the first-year follow-up.

Keywords: Dental implant; Occlusal force; Occlusion; Single crown.

Publication types

Review