Micro-computerized tomographic analysis of premolars restored with oval and circular posts.

Area of Science:

• Dental materials science and biomaterials research.
• Advanced imaging techniques in dentistry.

Background:

• Fiber posts are widely used for restoring endodontically treated teeth.
• Understanding the interplay between post shape, cementation, and void formation is crucial for long-term restoration success.

Purpose of the Study:

• To compare areas and volumes of post, cement, and voids in oval-shaped premolars restored with either oval or circular fiber posts using micro-computed tomography (microCT).

Main Methods:

• Twelve extracted premolars were restored with either circular or oval fiber posts.
• Micro-computed tomography (microCT) was employed to scan the restored teeth.
• Three-dimensional software was used to calculate areas and volumes of the canal, post space, post, cement, and voids at coronal, medium, and apical levels.

Main Results:

• The volume of cement was significantly higher with oval posts compared to circular posts.
• Void volume did not significantly differ based on post shape.
• Both void and cement volumes were greater at the coronal level, irrespective of post shape.

Conclusions:

• Post shape influences cement volume but not void volume in fiber post restorations.
• MicroCT analysis provides valuable insights into void distribution and cement thickness relative to post shape.
• Findings can guide clinicians in selecting appropriate fiber posts for optimal tooth reconstruction.