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Red fluorescence for assessing longitudinal tooth fractures.

Hye-Min Ku1, Euiseong Kim2, Baek-Il Kim1

  • 1Department of Preventive Dentistry & Public Oral Health, BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, Republic of Korea. Innovative Research and Support Center for Dental Science, Yonsei University Dental Hospital, Seoul, Republic of Korea.

Photodiagnosis and Photodynamic Therapy
|April 5, 2022
PubMed
Summary

Red fluorescence is common in cracked and split teeth but absent in vertical root fractures. This fluorescence is linked to clinical factors like sinus tracts and periradicular lesions, indicating extensive bone resorption.

Keywords:
AutofluorescenceBacteriaCracked toothLongitudinal tooth fractureSplit toothVertical root fracture

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Area of Science:

  • Dental diagnostics
  • Oral pathology
  • Biophotonics

Background:

  • Longitudinal tooth fractures (LTFs) present diagnostic challenges.
  • Autofluorescence properties of LTFs are not fully understood.
  • Investigating autofluorescence may reveal fracture characteristics.

Purpose of the Study:

  • To compare autofluorescence between different longitudinal tooth fracture types.
  • To identify clinical factors associated with red fluorescence in LTFs.

Main Methods:

  • Classified 33 extracted teeth into cracked teeth, split teeth, and root fractures.
  • Utilized an operating microscope for LTF identification.
  • Employed a fluorescence technique to capture LTF autofluorescence.
  • Correlated autofluorescence with preoperative clinical and radiographic findings.

Main Results:

  • Red fluorescence observed in 82% of cracked and 83% of split teeth; absent in vertical root fractures (p<0.001).
  • Surface red fluorescence penetrated fracture lines, unlike non-red fluorescence.
  • Sinus tract formation (p=0.021) and radiographic periradicular lesions (p=0.027) correlated with red fluorescence.

Conclusions:

  • Red fluorescence in LTFs is associated with specific fracture types originating from the crown.
  • The presence of red fluorescence in LTFs correlates with extensive periodontal bone resorption.