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CC BY 4.0 · Eur J Dent 2025; 19(01): 180-186
DOI: 10.1055/s-0044-1787696
Original Article

Evaluation of Microstrain in the Regions Surrounding Morse Taper and External Hexagon Implants

Authors

  • André Luiz de Melo Moreno 

    1   Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil

  • Marcio Campaner

    1   Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil

  • Clóvis Lamartine de Moraes Melo Neto 

    1   Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil

  • Nathaly Vilene de Araújo Moreno

    2   Courses in Dentistry (IEEP - Instituto de Excelência em Ensino e Pesquisa), Manaus, Amazonas, Brazil

  • Daniela Micheline dos Santos

    1   Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil

  • Marcelo Coelho Goiato 

    1   Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil
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Abstract

Objective The aim of this study was to compare the Morse taper (MT) + titanium base (Ti-Base) abutment with the external hexagon (EH) + Ti-Base abutment by using the strain gauge method in the mesial, distal, and apical–buccal areas around these types of implants.

Materials and Methods This study investigated two groups, MT and EH, each comprising five polyurethane samples with a dental implant (3.75 × 11.5 mm) in the area of artificial tooth 15. The strain gauges were glued to the mesial, distal, and apical–buccal polyurethane areas of all samples in relation to the implant. Ti-Base nonangled abutments were installed on the implants in each group. Ten identical zirconia crowns were constructed by scanning and milling and were subsequently cemented onto the Ti-base abutments with calcium hydroxide cement. Then, an axial load of 100 N was applied to the occlusal region of the zirconia crowns, and strain gauge measurements were taken.

Statistical Analysis Strain gauge data were assessed by a two-way analysis of variance (ANOVA) with “implant connection” and “strain gauge position” factors, followed by the Bonferroni test (p < 0.05).

Results The MT group showed significantly lower microstrain values in the mesial and apical strain gauges compared to the EH group.

Conclusion The MT group exhibited less microstrain in the mesial and apical areas of the polyurethane samples near the implant. Consequently, the MT connection was considered more biomechanically advantageous.

Keywords

strain gauge measurements - dental implant - external hexagon - morse taper - Ti-Base abutment - microstrain


Publication History

Article published online:
16 July 2024

© 2024. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/)

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