Clinical and radiographic outcomes of implant-supported fixed dental prostheses with cantilever extension. A retrospective cohort study with a follow-up of at least 10 years.

Schmid, Eric; Morandini, Michele; Roccuzzo, Andrea; Ramseier, Christoph A.; Sculean, Anton; Salvi, Giovanni E. (2020). Clinical and radiographic outcomes of implant-supported fixed dental prostheses with cantilever extension. A retrospective cohort study with a follow-up of at least 10 years. Clinical oral implants research, 31(12), pp. 1243-1252. Wiley-Blackwell 10.1111/clr.13672

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AIM

To report the clinical and radiographic outcomes of implant-supported fixed dental prostheses with cantilever extensions (FDPCs) after a function time ≥10 years.

MATERIAL AND METHODS

Patients with FDPCs in posterior areas were clinically and radiographically re-evaluated. Mesial and distal radiographic marginal bone levels (mBLs) from baseline (i.e. delivery of FDPC) to the follow-up examination were calculated and compared between implant surfaces adjacent to and distant from the cantilever extension. Implant survival rate, pocket probing depth (PPD), presence/absence of bleeding on probing (BoP) and presence/absence of mechanical/technical and biological complications were recorded.

RESULTS

Twenty-six patients with 30 FDPCs supported by 60 implants were re-evaluated after a mean loading time of 13.3 ± 2.7 years (range: 10-18.6 years). One diameter-reduced implant carrying a cantilever extension fractured, yielding a patient-based survival rate of 96.2% (95% CI: 0.95/1.0). The mean marginal bone level change was not statistically significantly different from baseline to follow-up (1.2 mm ± 0.9 to 1.6 mm ± 1.7; 95% CI: -0.1/0.9; p > .05). The mean PPD changed statistically significantly from 3.4 mm ± 0.7 to 3.7 mm ± 0.7 (95% CI: 0.04/0.6; p = .02). Loss of retention occurred ≥ 1x in 9 patients (34.6%, 95% CI: 0.44/0.83). At follow-up, peri-implant health was diagnosed in 12 (46.2%), peri-implant mucositis in 7 (26.9%) and peri-implantitis in 7 (26.9%) patients, respectively.

CONCLUSION

Despite a high rate of loss of retention, the use of implant-supported FDPCs in posterior areas represents a reliable long-term treatment option with a high implant survival rate and minimal peri-implant bone level changes irrespective of the location of the cantilever extension.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine > Department of Periodontology

UniBE Contributor:

Schmid, Eric; Roccuzzo, Andrea; Ramseier, Christoph Andreas; Sculean, Anton and Salvi, Giovanni Edoardo

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0905-7161

Publisher:

Wiley-Blackwell

Language:

English

Submitter:

Doris Burri

Date Deposited:

29 Dec 2020 11:44

Last Modified:

29 Dec 2020 11:44

Publisher DOI:

10.1111/clr.13672

PubMed ID:

32991763

Uncontrolled Keywords:

biological complications bone loss cantilever extension dental implants fixed dental prostheses technical complications

BORIS DOI:

10.48350/148719

URI:

https://boris.unibe.ch/id/eprint/148719

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