Influence of abutment height on peri-implant marginal bone loss: A systematic review and meta-analysis

Chen, Zhaozhao; Lin, Cho‐Ying; Li, Junying; Wang, Hom‐Lay; Yu, Haiyang

doi:10.1016/j.prosdent.2018.10.003

Cited by 40 publications

(40 citation statements)

References 51 publications

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“…Other variables established in the literature to affect MBL as mucosa thickness and abutment height [ 9 , 10 , 11 , 12 , 13 , 37 , 38 , 39 , 40 , 41 ] were not found to be contributing in this pool of patients and sites. What is noteworthy is that the effect of mucosal thickness and abutment height on MBL is not systematically assessed, and the reason for these discrepancies is not fully understood [ 37 , 42 , 43 ].…”

Section: Discussionmentioning

confidence: 75%

Factors Affecting Implant Failure and Marginal Bone Loss of Implants Placed by Post-Graduate Students: A 1-Year Prospective Cohort Study

et al. 2020

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Statement of the problem: Most of the clinical documentation of implant success and survival published in the literature have been issued by either experienced teams from university settings involving strict patient selection criteria or from seasoned private practitioners. By contrast, studies focusing on implants placed and rehabilitated by inexperienced post-graduate students are scarce. Purpose: To record failure rates and identify the contributing factors to implant failure and marginal bone loss (MBL) of implants placed and rehabilitated by inexperienced post-graduate students at the one-year follow-up. Material and Methods: A prospective cohort study was conducted on study participants scheduled for implant therapy at the International University of Catalonia. An experienced mentor determined the treatment plan in accordance with the need of each participant who signed an informed consent. All surgeries and prosthetic rehabilitation were performed by the post-graduate students. Implant failure rate, contributors to implant failure, and MBL were investigated among 24 variables related to patient health, local site, and implant and prosthetic characteristics. The risk of implant failure was analyzed with a simple binary logistic regression model with generalized equation equations (GEE) models, obtaining unadjusted odds ratios (OR). The relationship between MBL and the other independent variables was studied by simple linear regression estimated with GEE models and the Wald chi2 test. Results: One hundred and thirty dental implants have been placed and rehabilitated by post-graduate students. Five implants failed before loading and none after restoration delivery; survival and success rates were 96.15% and 94.62%, respectively. None of the investigated variables significantly affected the implant survival rate. At the one-year follow-up, the mean (SD) MBL was 0.53 (0.39) mm. The following independent variables significantly affected the MBL: Diabetes, implant depth placement. The width of keratinized tissue (KT) and probing depth (PD) above 3 mm were found to be good indicators of MBL, with each additional mm of probing depth resulting in 0.11 mm more MBL. Conclusion: The survival and success rates of dental implants placed and rehabilitated by inexperienced post-graduate students at the one-year follow-up were high. No contributing factor was identified regarding implant failure. However, several factors significantly affected MBL: Diabetes, implant depth placement, PD, and width of KT. Clinical Implications: Survival and success rates of dental implants placed and rehabilitated by inexperienced post-graduate students were high at the one-year follow-up, similar to experienced practitioners. No contributing factors were identified regarding implant failure; however, several factors significantly affected MBL: Diabetes, implant depth placement, PD, and KM.

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Section: Discussionmentioning

confidence: 75%

Factors Affecting Implant Failure and Marginal Bone Loss of Implants Placed by Post-Graduate Students: A 1-Year Prospective Cohort Study

et al. 2020

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“…Several factors related to the abutments may have affected the amount of MBL. The height of the abutments may influence the bone level in the early and late periods of healing while the abutment material has been shown to have a low influence on marginal bone level . An external implant‐abutment connection presented higher MBL compared to an internal connection that was mostly related to the platform switching concept .…”

Section: Discussionmentioning

confidence: 99%

“…However, in the case of tilted implants, it is not only the implant per se that is placed in a non‐axial direction, but also the prosthetic abutment that needs often to be placed tilted to facilitate a better emergence profile and enable prosthetic rehabilitation. Various systematic reviews have evaluated several aspects related to abutment connection, and abutment material including its height . However, no systematic reviews have been published comparing the outcomes of straight and angulated abutment installation.…”

Section: Introductionmentioning

confidence: 99%

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Biological and mechanical complications of angulated abutments connected to fixed dental prostheses: A systematic review with meta‐analysis

Omori

Lang

Botticelli³

et al. 2019

J of Oral Rehabilitation

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Objectives To evaluate the biological and mechanical complications of angulated abutments on full‐arch and partial jaw rehabilitations with a follow‐up for at least 1 year. Methods Electronic search was carried out in MEDLINE, EMBASE and Web of Science. Studies published between January 2000 and January 2019 were included. The quality of the included studies was assessed. The data extraction was focused on implant loss, marginal bone loss and mechanical complications, and meta‐analyses were performed for marginal bone loss, mechanical complications and implant failure. Results Nine studies, three prospective and six retrospective cohort studies were included. They reported on 797 patients that received 4127 implants. The total number of abutments was 4079 of which 1673 were angulated, and 2406 were straight. All abutments were prefabricated. Angulated abutments were associated with increased implant failure rates (two studies; RR = 7.30; 95% CI = 2.79‐19.08) and an effect that was both statistically significant (P < .001) and clinically relevant. Three studies reported differentiated data for mechanical and technical complications at 1 year of follow‐up, being mostly related to the retention screw while screw fracture. Angulated abutments were associated with a statistically significant increase in MBL 1 year after insertion compared to straight abutments (three studies; MD = 0.08 mm; 95% CI = 0.01‐0.14 mm; P = .02), which might be, however, clinically negligible. Conclusions The prosthetic complications such as screw loosening and abutment loosening were frequent. After 1 year of follow‐up, implants supporting angulated abutments yielded significantly more marginal bone loss than those supporting straight abutments.

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“…Nevertheless, to date, it is challenging to state the optimal implant configuration, due to the many variables involved. In fact, shape and size of the transmucosal abutment also strongly affect the implant behavior [20]. The relationship that emerges from literature is an increase in the cement retention with decreasing taper and increasing height of the abutment [21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

In Vitro Impact Testing to Simulate Implant-Supported Prosthesis Retrievability in Clinical Practice: Influence of Cement and Abutment Geometry

et al. 2020

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Cement-retained implant-supported prosthetics are gaining popularity compared to the alternative screw-retained type, a rise that serves to highlight the importance of retrievability. The aim of the present investigation is to determine the influence of luting agent, abutment height and taper angle on the retrievability of abutment–coping cementations. Abutments with different heights and tapers were screwed onto an implant and their cobalt-chrome copings were cemented on the abutments using three different luting agents. The removals were performed by means of Coronaflex®. The number of impulses and the forces were recorded and analyzed with a Kruskal–Wallis test. Harvard cement needed the highest number of impulses for retrieval, followed by Telio CS and Temp Bond. However, abutment height and taper showed a greater influence on the cap’s retrievability (p < 0.05). Long and tapered abutments provided the highest percentage of good retrievability. The influence of the luting agent and the abutment geometry on the cap’s retrieval performed by Coronaflex® reflects data from literature about the influence of the same factor on the maximum force reached during uniaxial tensile tests. The impulse force was slightly affected by the same factors.

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Influence of abutment height on peri-implant marginal bone loss: A systematic review and meta-analysis

Cited by 40 publications

References 51 publications

Factors Affecting Implant Failure and Marginal Bone Loss of Implants Placed by Post-Graduate Students: A 1-Year Prospective Cohort Study

Factors Affecting Implant Failure and Marginal Bone Loss of Implants Placed by Post-Graduate Students: A 1-Year Prospective Cohort Study

Biological and mechanical complications of angulated abutments connected to fixed dental prostheses: A systematic review with meta‐analysis

In Vitro Impact Testing to Simulate Implant-Supported Prosthesis Retrievability in Clinical Practice: Influence of Cement and Abutment Geometry

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