Title

In vitro study on the mechanical strength of abutment screw head under compressive forces

Authors

Sunita Chaudhary^1,*, Preeti Bhadouria², Deepak Tomar³, Meenakshi Singh Tomar⁴, Rushit Patel⁵ & Amit Kumar Upadhyay⁶

Affiliation

¹Department of Prosthodontics, DJ College of Dental Sciences and Research, Modinagar, Uttar Pradesh, India; ²Department of Oral Medicine & Radiology, Maharana Pratap college of Dentistry & Reasearch Centre, Gwalior, Madhya Pradesh, India; ³Department of Orthodontics, Ram Krishna Dharmarth Foundation Dental College and Research Centre Bhopal, Madhya Pradesh, India; ⁴Department of Prosthodontics, Ram Krishna Dharmarth Foundation Dental College and Research Centre Bhopal, Madhya Pradesh, India; ⁵Department of Oral & Maxillofacial Surgery, Karnavati School of Dentistry, Karnavati University, Gandhinagar, Gujrat, India; ⁶Department of Periodontology, Shri Balaji Institute of Dental Sciences, Raipur, Chhattisgarh, India; *Corresponding author

Email

Sunita Chaudhary - E-mail: sunitachoudhary.sgnr@gmail.com
Preeti Bhadouria - E-mail: drpreetibhadouria@gmail.com
Deepak Tomar - E-mail: tomardeepak1981@gmail.com
Meenakshi Singh Tomar - E-mail: dr.meenakshi4@gmail.com
Rushit Patel - E-mail: drrushitpatel@gmail.com
Amit Kumar Upadhyay - E-mail: amitu54@gmail.com

Article Type

Research Article

Date

Received October 1, 2025; Revised November 15, 2025; Accepted November 15, 2025, Published November 15, 2025

Abstract

The biomechanical stability of implant-abutment connections is influenced by abutment screw head design. Therefore, it is of interest to compare fracture resistance, deformation and torque loss among hexagonal, star-shaped and conical screw head interfaces. Forty-five titanium assemblies were loaded axially until failure and outcomes were analyzed with ANOVA and Tukey's test. Conical screws showed significantly higher fracture resistance, lower deformation and better preload retention than other designs (p < 0.001). Thus, we show that conical interface screws provide superior mechanical stability under compressive forces.

Keywords

Dental implants, abutment screw, mechanical strength, compressive force, screw head design, in vitro study

Citation

Chaudhary et al. Bioinformation 21(11): 4198-4202 (2025)

Edited by

Vini Mehta

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.