Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Finite Element Analysis (FEA) of the Stress and Strain Distribution in Cone-Morse Implant-Abutment Connection Implants Placed in an Equicrestal and Subcrestal Position

Natalia Di Pietro
* ORCID logo ,
Mario Ceddia
,
Tea Romasco
ORCID logo ,
Nilton De Bortoli Junior
,
Bruno Freitas Mello
,
Margherita Tumedei
,
Alessandro Specchiulli
,
Adriano Piattelli
,
Bartolomeo Trentadue
ORCID logo
Version 1 : Received: 24 June 2023 / Approved: 25 June 2023 / Online: 25 June 2023 (05:49:19 CEST)

A peer-reviewed article of this Preprint also exists.

Di Pietro, N.; Ceddia, M.; Romasco, T.; De Bortoli Junior, N.; Mello, B.F.; Tumedei, M.; Specchiulli, A.; Piattelli, A.; Trentadue, B. Finite Element Analysis (FEA) of the Stress and Strain Distribution in Cone-Morse Implant–Abutment Connection Implants Placed Equicrestally and Subcrestally. Appl. Sci. 2023, 13, 8147. Di Pietro, N.; Ceddia, M.; Romasco, T.; De Bortoli Junior, N.; Mello, B.F.; Tumedei, M.; Specchiulli, A.; Piattelli, A.; Trentadue, B. Finite Element Analysis (FEA) of the Stress and Strain Distribution in Cone-Morse Implant–Abutment Connection Implants Placed Equicrestally and Subcrestally. Appl. Sci. 2023, 13, 8147.

Abstract

Peri-implant bone resorption has been reported around some implants after loading and this could create problems for the long-term stability of peri-implant soft and hard tissues. The causes are still not completely known, but a relevant importance could be assumed by the presence of a bacterial contamination at the micro-gap level of the implant-abutment junction. In this regard, external and internal implant-abutment assemblies have been shown to be much more permeable to bacterial colonization than Cone-Morse or conical connections. A subcrestal implant placement could have aesthetic advantages allowing a better prosthetic emergence profile. In literature controversial experimental and clinical results have been reported about bone resorption around implants placed equicrestally and subcrestally. Interestingly, Finite Element Analysis (FEA) studies revealed to be extremely useful for assessing the peri-implant bone strain and stress. Thus, the aim of this study was a FEA evaluation of implants with a Cone-Morse implant-abutment assembly (Implacil De Bortoli, São Paulo, Brazil) inserted into a bone block model (width: 10 mm, vertical height: 17.5 mm, thickness of the cortical area: 1.5 mm) mimicking equicrestal and subcrestal placements (1 and 2 mm). The results demonstrated that maximum stresses were observed within the cortical bone around the equicrestally placed implants, the lowest in the implant placed 2-mm subcrestally and intermediate stresses within the implant placed 1-mm subcrestally. Cortical bone was more stressed under lateral loads than axial loads. In conclusion, this FEA study suggested that implant placement at -1 mm could be recommended.

Keywords

Bacterial leakage; Cone-Morse connection; dental implants; equicrestal implant placement; Finite Element Analysis (FEA); implant-abutment junction; implant placement; subcrestal implant placement.

Subject

Medicine and Pharmacology, Dentistry and Oral Surgery

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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