Restor Dent Endod.  2017 Aug;42(3):232-239. 10.5395/rde.2017.42.3.232.

Light-emitting diode assessment of dentinal defects: the role of presumed extraction forces

• Coelho MS
• Card SJ
• Tawil PZ

• KMID: 2386777
• DOI: http://doi.org/10.5395/rde.2017.42.3.232

Abstract

OBJECTIVES
The evaluation of iatrogenic dentinal defects in extracted teeth may be influenced by extraction forces and prolonged dry times. The purpose of this study was to compare the presence of dentinal defects in freshly extracted, periodontally compromised teeth with those in a group of teeth with uncontrolled extraction forces and storage time.
MATERIALS AND METHODS
The experimental group consisted of eighteen roots obtained from teeth extracted due to periodontal reasons with class II or III mobility. They were kept in saline and sectioned within 1 hour following extraction. The control group consisted of matched root types obtained from an anonymous tooth collection, consistent with previous dentinal defect studies. The slices were obtained at 3, 6, and 9 mm from the apex. The imaging process exposed all specimens to no more than 60 seconds of dry time. The × 12.8 magnification was used for the 9 mm slices and × 19.2 magnification for the 3 mm and 6 mm slices under light-emitting diode (LED) transillumination. The root canal spaces and periodontal tissues were masked to minimize extraneous factors that might influence the evaluators. Chi-square test was used for statistical analysis.
RESULTS
Dentinal defects were detected in 17% of the experimental group teeth, compared to 61% of control teeth (p = 0.015).
CONCLUSIONS
LED transillumination assessment of freshly extracted roots with class II or III mobility showed smaller number of dentinal defects than roots with uncontrolled storage time and extraction forces. The use of freshly extracted roots with mobility should be considered for future dental defect assessment studies.

Keyword

Crack; Dentin; Light-emitting diode transillumination; Root canal therapy

MeSH Terms

Anonyms and Pseudonyms
Dental Pulp Cavity
Dentin*
Masks
Root Canal Therapy
Tooth
Transillumination

Figure

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  Figure 1 Specimen of group 1 presenting (A) remnants of periodontal ligament and (B) specimen masked.

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  Figure 2 Specimens of (A) group 1 and (B) group 2 presenting dentinal defects (arrows).

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