X-ray dark-field tomography reveals tooth cracks

Area of Science:

• Dental diagnostics
• Medical imaging technology

Background:

• Cracked tooth syndrome (CTS) affects 5% of adults annually, with diagnosis often challenging due to vague symptoms.
• Current diagnostic methods like visual inspection and conventional radiography have limitations in detecting subtle tooth cracks.

Purpose of the Study:

• To investigate X-ray dark-field tomography (XDT) as a novel, non-destructive method for detecting tooth microcracks.
• To evaluate the potential of XDT for evidence-based diagnosis of cracked teeth.

Main Methods:

• Utilized X-ray dark-field tomography (XDT), which measures both X-ray attenuation and small-angle scattering (SAXS).
• SAXS signal is sensitive to micrometer-scale structural changes and interfaces created by microcracks.
• Applied XDT to three ex-vivo teeth for proof-of-principle demonstration.

Main Results:

• XDT detected microcracks by analyzing SAXS signals sensitive to electron density gradients and morphology.
• Complementary attenuation data visualized larger cracks.
• Achieved non-destructive detection of cracks across all length scales in whole teeth.

Conclusions:

• X-ray dark-field tomography demonstrates significant potential for the evidence-based detection of cracked teeth.
• This technique offers a sensitive method for identifying microcracks that are difficult to diagnose with current methods.
• XDT advances non-destructive dental diagnostics by revealing sub-pixel structures.