Title

Evaluation of microgap at implant abutment interface using different connection design

Authors

D. Vidhyadhar¹, Tejosmita Chowdary Pavuluri², Vivek Anne^3,*, Sruthi Katamneni⁴, B.Vimal Bharathi⁵, Radha Chiluka⁵ & Sriharsha Pudi⁶

Affiliation

¹Department of Prosthodontics Crown and Bridge, Balaji Family Dental Care, Kamareddy, Telangana, India; ²Department of Biomedical Sciences, Rutgers Biomedical and Health Sciences, Newark, New Jersey, 07107, USA; ³Department of General Dentistry, Always Smile Dental Care, North Brunswick Township, New Jersey, USA; ⁴Department of General Dentistry, Indiana University School of Dentistry Indianapolis, Indiana, USA; ⁵Department of Prosthodontics, Panineeya Institute of Dental Sciences, Hyderabad, Telangana, India; ⁶Department of Prosthodontics, MNR Dental College and Hospital, Sangareddy, Telangana, India; *Corresponding author

Email

D. Vidhyadhar - E-mail: vidyadharmds@gmail.com

Tejosmita Chowdary Pavuluri - E-mail: tjteju.chowdary@gmail.com

Vivek Anne - E-mail: Vivekanne999@gmail.com

Sruthi Katamneni - E-mail: katamneni.sruthi27@gmail.com

B. Vimal Bharathi - E-mail: vimalbharathi87@gmail.com

Radha Chiluka - E-mail: drradha29@gmail.com

Sriharsha Pudi - E-mail: Sriharshabds@gmail.com

Article Type

Research Article

Date

Received April 1, 2026; Revised April 30, 2026; Accepted April 30, 2026, Published April 30, 2026

Abstract

The persistent presence of a microgap at the implant-abutment interface continues to pose biological and mechanical challenges, yet the influence of different connection designs remains insufficiently understood. Therefore, it is of interest to evaluate 100 implant abutment assemblies external hex, internal hex and internal conical using SEM before and after cyclic loading. External hex connections showed the largest microgaps, internal hex showed moderate values and internal conical exhibited the smallest and most stable interface. Statistical analysis confirmed significant differences among the designs, with conical connections demonstrating superior resistance to microgap enlargement under functional loading. Thus, we show new comparative evidence showing that internal conical connections provide the most stable interface, thereby advancing knowledge on optimal implant-abutment design for improved clinical outcomes.

Keywords

Abutment interface, cyclic loading, implant connection, microgap, scanning electron microscope (SEM)

Citation

Vidhyadhar et al. Bioinformation 22(4): 2283-2286 (2026)

Edited by

Ritik Kashwani

ISSN

0973-2063

Publisher

Biomedical Informatics

License

This is an Open Access article which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. This is distributed under the terms of the Creative Commons Attribution License.