Cone Beam Computed Tomography- An Effective Tool in Detecting Caries Under Fixed Dental Prostheses

Area of Science:

• Dental Imaging
• Restorative Dentistry
• Diagnostic Techniques

Background:

• Secondary caries is a leading cause of restorative failures and prosthesis replacement.
• Early diagnosis of caries under fixed dental prostheses is crucial for treatment success.
• Conventional imaging methods can be limited by artifacts, hindering caries detection.

Purpose of the Study:

• To evaluate the efficacy of Cone Beam Computed Tomography (CBCT) in detecting secondary caries.
• To assess CBCT's diagnostic capability for caries beneath various types of fixed dental prostheses.
• To determine if CBCT can diagnose caries without the need for prosthesis removal.

Main Methods:

• Six extracted teeth with ICDAS Grade 6 caries were prepared with four crown types: full metal, metal-ceramic, full ceramic, and metal-acrylic.
• Specimens were scanned using CBCT with specific exposure parameters (60 kVp, 3mA) and field of view (8cm X 8cm).
• Gray values of caries and non-caries regions were analyzed using T-tests and two-way ANOVA to assess differences across materials and conditions.

Main Results:

• CBCT demonstrated significant differences in detecting caries across different prosthesis materials (p<0.001).
• Mean gray values differed significantly between carious and non-carious regions for each material type.
• No significant differences in detection efficacy were observed based on the location (anterior vs. posterior).

Conclusions:

• Cone Beam Computed Tomography (CBCT) is an effective diagnostic tool for identifying secondary caries under fixed dental prostheses.
• CBCT allows for caries detection without the necessity of removing the prosthesis, simplifying post-treatment evaluation.
• This imaging modality offers a valuable non-invasive approach for managing restorative complications.