J Korean Acad Pediatr Dent.  2025 May;52(2):159-168. 10.5933/JKAPD.2025.52.2.159.

Influence of Preservation Methods on Reattached Tooth Fragments: A Study of Color Stability and Strength

• Jang Y
• Lee J
• Kim G

• KMID: 2567993
• DOI: http://doi.org/10.5933/JKAPD.2025.52.2.159

Abstract

This study compared and evaluated the color change and fracture resistance of reattached tooth fragments stored in different media after trauma. Sixty extracted permanent incisors were examined. Tap water, saline solution, milk, artificial saliva, and casein phosphopeptide-amorphous calcium and phosphate (CPP-ACP) were used as storage media. The control group used no storage media. Color changes were calculated using CIE L*a*b* values measured by a spectrophotometer at seven time points: just before reproducing the tooth fracture (T0); after drying the fractured crown for 24 hours following fracture (T1); immediately after rehydration in the storage medium for 20 minutes (T2); and 12 hours (T3), 24 hours (T4), 1 week (T5), and 3 weeks (T6) after reattaching the fractured crown. Fracture resistance was uniformly measured 3 weeks after reattachment. The results showed that the CPPACP group showed significantly more effective color recovery than the other storage media groups, with the color returning to natural levels by T2. Color recovery was observed in all groups at T6. Fracture resistance did not differ significantly between the six groups. No significant difference was observed between the storage media regarding color recovery and fracture resistance three weeks after reattachment.

Keyword

Trauma; Color recovery; Fracture resistance; Reattachment