Amalesh Kondeti¹*, Sunil Chandra Tripuraneni², Atluri Kaleswara Rao³, Sriharsha Babu Vadapalli⁴, Hemchand Surapaneni³ and Chandrakala Bodapati¹

¹Post Graduate Student, Department of Prosthodontics and Crown & Bridge, Drs. Sudha & Nageswara Raо Siddhartha Institute of Dental Sciences, India
²Professor and Head, Department of Prosthodontics and Crown & Bridge, Drs. Sudha & Nageswara Raо Siddhartha Institute of Dental Sciences, India
³Professor, Department of Prosthodontics and Crown & Bridge, Drs. Sudha & Nageswara Raо Siddhartha Institute of Dental Sciences, India
⁴Associate Professor, Department of Prosthodontics and Crown & Bridge, Drs. Sudha & Nageswara Raо Siddhartha Institute of Dental Sciences, India

*Corresponding Author: Amalesh Kondeti, Post Graduate Student, Department of Prosthodontics and Crown & Bridge, Drs. Sudha & Nageswara Raо Siddhartha Institute of Dental Sciences, India.

Received: October 21, 2025; Published: November 15, 2025

Abstract

Aim of Study: Evaluation of influence of final preload on screw stress and formation of implant-abutment micro gaps between conical and tri-lobe connections: a finite element analysis.

Materials: 1. Titanium implant data of Noble replace and Noble replace select from Noble Biocare implant system 2. Noble biocare torque wrench, 3. Noble biocare hex 4. Acrylic resin material 5. Load adapters for conical connection and trichannel connection 6. 3-D Finite element models implant and abutment embeded in resin with load adapter. Personal computer configurations • Hard disc: 500 Gigabyte. • Ram: 16 Gigabyte. Software configurations • Modeling – Solid Edge V19. • Meshing – Hypermesh V11. • Analysis – Ansys V18.1.

Methodology: In the present study, virtual models of implant-abutment connections with conical (Nobel Biocare Replace) and trichannel designs (Nobel Biocare Replace select) were created based on physical models. For these models, final preload values of 35 Ncm and 45 Ncm were applied, and the tensile and compressive stresses at the abutment screw together the conical and trichannel models were recorded. An oblique stress was imposed to the models, and stresses were measured before, during, and after loading. These stress measurements, together with the evaluation of microgaps, were used to analyze how the conical and trichannel connections performs using specific software tools.

Result: 1. The conical implant–abutment connection demonstrated superior mechanical performance, with more favorable stress distribution and lower overall microgap values when compared to the trilobe implant–abutment connection. 2. The trilobe implant–abutment connection exhibited higher stress concentrations, particularly in the abutment screw and contact interface regions, potentially leading to increased mechanical complications such as screw loosening or fracture

Keywords: Microgap; Finite Element Analysis (FEA); Screw Stress

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Citation

Citation: Amalesh Kondeti., et al. “Evaluation of Influence of Final Preload on Screw Stress and Formation of Implant-Abutment Micro Gaps Between Conical and Trilobe Connections: A Finite Element Analysis".Acta Scientific Dental Sciences 9.12 (2025): 25-31.

Copyright

Copyright: © 2025 Amalesh Kondeti., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.