Periodontal healing of replanted monkey teeth prevented from drying

Area of Science:

• Oral surgery
• Dental traumatology
• Cell biology

Background:

• Root resorption is a common complication following tooth replantation.
• The extra-alveolar period and storage conditions significantly influence resorption.
• Maintaining periodontal ligament (PDL) viability is critical for successful replantation.

Purpose of the Study:

• To investigate the impact of preserving PDL humidity on cell viability and recovery.
• To evaluate the effect of a moist extra-alveolar environment on replanted teeth root resorption.

Main Methods:

• Isolated PDL cells were exposed to humid and dry conditions for 1 hour.
• Cell viability and recovery were assessed using the trypan blue exclusion test and cultivation.
• Replanted monkey teeth were stored in a moist (plastic foil) or dry (air) environment for 1 hour before replantation.

Main Results:

• In a humid atmosphere, approximately 70% of PDL cells remained viable and 44% recovered.
• Drying PDL cells for 1 hour resulted in virtually no cell viability or recovery.
• Teeth stored in plastic foil showed no increased root resorption compared to immediate replantation.
• Teeth dried in air exhibited extensive root resorption.

Conclusions:

• Preserving PDL moisture is essential to prevent cell death and ensure successful tooth replantation.
• A moist extra-alveolar environment effectively prevents root resorption during the critical initial period.
• Preventing PDL desiccation should be a primary goal in managing avulsed teeth.