3D Finite Element Study on: Bar Splinted Implants Supporting Partial Denture in the Reconstructed Mandible

Area of Science:

• Biomaterials Science
• Biomechanics
• Dental Implantology

Background:

• Reconstructed mandibles with removable prostheses often utilize bar-splinted implants for support and retention.
• Understanding stress distribution is crucial for prosthesis longevity and patient comfort.

Purpose of the Study:

• To estimate stress patterns in bar-splinted implants and surrounding bone under masticatory loads.
• To evaluate the influence of different clip materials on stress distribution in a reconstructed mandible.

Main Methods:

• Two 3D finite element models were created using CAD/CAM software.
• Masticatory forces (100N) were applied unilaterally and bilaterally to simulate chewing.
• Analysis assumed full osseointegration and fixed temporomandibular joint (TMJ) surfaces.

Main Results:

• The metallic bar's stress was independent of clip material.
• Implants supporting the bar exhibited maximum stress at the neck region.
• Fibula and jaw bone experienced physiological stress levels; clip material effect was minimal.

Conclusions:

• Clip material has a negligible effect on the overall stress distribution.
• Changing load direction from tension to compression reversed stress signs but not distribution patterns.