Fiber-reinforced composite full-arch prosthetic reconstructions supported by three standard, short or extra-short implants: a two-center retrospective study

Yu-Chi Cheng; Paolo Perpetuini; Laura Murcko; Muneki Hirayama; Katherine Morgan; Mauro Marincola; Estevam A Bonfante; Edmara T P Bergamo; Rolf Ewers

doi:10.1007/s00784-023-05035-w

Fiber-reinforced composite full-arch prosthetic reconstructions supported by three standard, short or extra-short implants: a two-center retrospective study

Clin Oral Investig. 2023 Aug;27(8):4191-4203. doi: 10.1007/s00784-023-05035-w. Epub 2023 May 4.

Authors

Yu-Chi Cheng¹, Paolo Perpetuini², Laura Murcko³, Muneki Hirayama³, Katherine Morgan³, Mauro Marincola⁴, Estevam A Bonfante⁵, Edmara T P Bergamo⁶, Rolf Ewers⁷

Affiliations

¹ Harvard School of Dental Medicine, Boston, MA, USA.
² Private Practice Laboratorio Odontotechnico, Cisterna Di Latina, Italy.
³ Private Practice Implant Dentistry Centre, Boston, MA, USA.
⁴ Department of Oral Surgery, University of Cartagena, Cartagena, Colombia.
⁵ Department of Prosthodontics and Periodontology, University of Sao Paulo - Bauru School of Dentistry (FOB-USP), 9-75 Octavio Pinheiro Brizolla, Bauru, SP, 17012-901, Brazil.
⁶ Department of Prosthodontics and Periodontology, University of Sao Paulo - Bauru School of Dentistry (FOB-USP), 9-75 Octavio Pinheiro Brizolla, Bauru, SP, 17012-901, Brazil. edmaratatiely@gmail.com.
⁷ Department of Oral Surgery, University Hospital for Cranio-Maxillofacial and Oral Surgery and Cranio-Maxillofacial Institute Vienna (CMF), Vienna, Austria.

PMID: 37140762
DOI: 10.1007/s00784-023-05035-w

Abstract

Objectives: To evaluate the survival of implants and prostheses, and marginal bone level of fiber-reinforced composite implant supported fixed complete prostheses supported by 3 implants.

Materials and methods: Patients with fiber-reinforced composite fixed prostheses supported by 3 standard-length, short or extra-short implants were included in this retrospective cohort study. Kaplan-Meier survival was computed for implants and prostheses. Univariate and multivariate Cox proportional hazard regressions, clustered by patient, were used to analyze bone level differences as a function of different study covariates. Linear regressions were used to investigate the relationship between distal extension lengths and bone levels.

Results: Forty-five patients with 138 implants were followed for up to 10 years after prosthesis insertion (mean 52.8; SD 20.5 months). Kaplan-Meier survival analysis showed overall survival rates of 96.5% for implants and of 97.8% for prostheses. The 10-year success rate for prostheses was 90.8%. Extra-short implants survived at similar rates to short and standard implants. Marginal bone levels surrounding implants remained stable over time, even showing slight bone gain on average (mean + 0.1 mm/year; SD ± 0.5 mm/year) Acrylic denture teeth, overdentures on the opposing arch, and implant placement in the posterior maxilla were correlated with bone gain. Screw retention, opposed to telescopic retention, was correlated with bone loss. Longer distal extensions were correlated with bone gain on the implants closest to the distal extensions.

Conclusions: Fiber-reinforced composite fixed prostheses supported by only 3 implants, most of which were extra-short, presented high survival rates with stable bone levels.

Clinical relevance: An encouraging prognosis can be expected for restoration of atrophic maxillary and mandibular arches, when restored with fixed fiber-reinforced composite frameworks with long distal extensions and supported on only 3 short implants.

Keywords: Clinical study; Dental implants; Dental prosthesis; Survival rates.

MeSH terms

Dental Implantation, Endosseous
Dental Implants*
Dental Prosthesis Design
Dental Prosthesis, Implant-Supported
Dental Restoration Failure
Follow-Up Studies
Humans
Maxilla / surgery
Retrospective Studies
Treatment Outcome

Substances

Dental Implants