In this tutorial, we investigate how different implant thread pitches influence stress distribution in jawbones using the finite element method. We also assess the implant–abutment system performance under physiological loading. The focus is on comparing two thread profile types and evaluating their impact on stress transfer to the surrounding bone tissue, particularly analyzing peak stress at the implant–bone interface.

The simulation begins with modeling the crown (superstructure), abutment, and mandible in 3D. The jawbone is divided into cortical and cancellous (spongy) sections for more accurate representation. We use a static general step for the analysis and define material properties accordingly: titanium alloy for the implant, elastic ceramic for the crown (which fails once yield is exceeded), and linear elastic models for the jawbone to reflect its brittle nature.

We examine various thread geometries while applying realistic chewing forces via an amplitude load profile. Frictional contact is defined between the implant and bone to simulate real interaction. The general contact algorithm is used for all interface definitions. Boundary conditions are applied to constrain the mandible, while a smooth concentrated force is applied to the crown. Due to model complexity, an adequately refined mesh is used to ensure accuracy.

The results section presents a comparative analysis of stress concentrations based on thread design, offering insights into implant performance and potential bone risk zones.