A scanning electron microscopic study of external root resorption in replanted dog teeth

Area of Science:

• Dentistry
• Oral Surgery
• Biomaterials Science

Background:

• Root resorption is a significant complication following dental trauma and tooth replantation.
• Preserving the vitality of the periodontal ligament and pulp influences the outcome of replantation.

Purpose of the Study:

• To investigate the effect of pulp status and immersion time in saline on root resorption after replantation of mature dog incisors.
• To evaluate the efficacy of root canal filling with Calciocbiotic Root Canal Sealer in mitigating root resorption.

Main Methods:

• Mature dog incisors were extracted and divided into three groups based on immersion time in saline (5, 30, 120 minutes).
• Teeth were replanted with either intact pulp or after root canal filling with Calciocbiotic Root Canal Sealer.
• Scanning electron microscopy was used to examine apical root surfaces 90 days post-replantation.

Main Results:

• Severe inflammatory root resorption was observed in teeth with intact pulp.
• Root canal filling significantly reduced root resorption compared to intact pulp.
• Teeth immersed for 30 minutes showed less root resorption than those immersed for 120 minutes after root canal filling.

Conclusions:

• Maintaining pulp vitality is critical to prevent severe root resorption after tooth replantation.
• Root canal treatment, particularly when performed after shorter extra-coronal times, can mitigate post-replantation root resorption.
• Optimizing the management of the root canal space and extra-coronal time is crucial for successful tooth replantation outcomes.