Overlay Analysis of Cone-Beam Computed Tomography Volumes Acquired before and after Horizontal Alveolar Ridge...

Area of Science:

• Dentistry
• Oral and Maxillofacial Surgery
• Imaging Technology

Background:

• Horizontal alveolar ridge augmentation (HRA) is crucial for dental implant success.
• Accurate measurement of dimensional changes post-HRA is essential for evaluating treatment outcomes.
• Existing methods often fail to capture comprehensive vertical and horizontal alterations.

Purpose of the Study:

• To demonstrate the efficacy of a novel imaging analysis technology.
• To precisely measure horizontal and vertical dimensional changes after HRA.
• To compare CBCT overlay analysis with traditional in situ recording methods.

Main Methods:

• Utilized cone-beam computed tomography (CBCT) scans from 65 HRA sites in 57 patients.
• Employed 3D analysis software to overlay pre- and post-augmentation CBCT volumes.
• Recorded horizontal and vertical ridge dimensional (HRD/VRD) changes, analyzing patient, site, and procedure variables.

Main Results:

• Vertical ridge dimensional (VRD) changes varied from -2.9 to 3.0 mm, with many anterior sites losing height.
• Mean HRD increase at 3mm and 5mm apical to the crest was 2.3±1.6 mm and 2.4±1.3 mm.
• Membrane fixation and non-resorbable membrane use correlated with greater dimensional gains.

Conclusions:

• Novel CBCT overlay analysis enables simultaneous HRD and VRD evaluation.
• This method provides a more complete characterization of dimensional changes compared to in situ recordings.
• The protocol ensures accurate baseline and post-augmentation recordings at identical positions.