Three dimensional quantification of mandibular bone remodeling using standard tessellation language registration...

Area of Science:

• Dental Implantology
• Biomedical Imaging
• Oral and Maxillofacial Surgery

Background:

• Quantifying longitudinal mandibular bone remodeling is crucial for assessing implant stability and treatment outcomes.
• Traditional methods often lack the precision to capture complex 3D volumetric changes.
• Cone beam computed tomography (CBCT) offers detailed anatomical data but requires advanced analysis for volumetric assessment.

Purpose of the Study:

• To evaluate a novel 3D method for quantifying longitudinal mandibular bone remodeling.
• To assess the efficacy of this method in analyzing changes related to implant-retained overdentures.
• To establish a reproducible technique for measuring volumetric bone alterations.

Main Methods:

• Utilized cone beam computed tomography (CBCT) imaging from 20 patients (aged 52-79) at 1 and 2 years post-implant-retained overdenture treatment.
• Reconstructed 3D models of the mandible before and after treatment.
• Employed Standard Tessellation Language (STL) registration for superimposition and segmentation to quantify volumetric changes.

Main Results:

• The STL-based superimposition generated color maps visualizing 3D bone dimensional changes, including apical displacement and cortical thinning.
• Significant mandibular bone volume decrease occurred, averaging 3.7% in the first year (median -3.7%).
• Bone remodeling continued at a reduced rate of 2.5% per year in the second year (median -3.9%).

Conclusions:

• Standard Tessellation Language (STL) registration and CBCT image superimposition provide an objective and reproducible method for 3D quantification of mandibular bone remodeling.
• This technique offers detailed insights into bone volumetric changes around dental implants.
• The findings highlight the dynamic nature of mandibular bone remodeling in response to implant-retained overdentures.