Clinical Evidence for Regenerative Endodontic Procedures: Immediate versus Delayed Induction?

Area of Science:

• Endodontics
• Pediatric Dentistry
• Regenerative Endodontics

Background:

• Treating immature permanent teeth presents significant clinical challenges.
• Immediate blood clot induction is a proposed regenerative treatment, but lacks clinical trial evidence.
• Existing literature primarily consists of case reports on this endodontic technique.

Purpose of the Study:

• To compare the success rates of immediate versus delayed blood clot induction protocols.
• To test the hypothesis that there is no difference in treatment success between the two protocols.
• To evaluate periapical healing in immature permanent teeth after regenerative endodontic treatment.

Main Methods:

• A randomized clinical trial was conducted involving patients with pulpal necrosis in immature permanent teeth.
• The delayed induction group (15 teeth) followed standard guidelines with calcium hydroxide medication.
• The immediate induction group (13 teeth) had blood clot induction at the first appointment.
• Periapical healing was assessed by three independent evaluators at 1, 3, and 12 months.
• Statistical analysis used the Pearson chi-square or Fisher exact test.

Main Results:

• Nineteen patients (28 teeth) completed the 12-month follow-up.
• The delayed induction group achieved a 71% success rate.
• The immediate induction group had a 33% success rate.
• Trauma was the etiology in 79% of cases.
• Successful cases were associated with later stages of root development (Nolla stage 9).

Conclusions:

• Early findings suggest delayed blood clot induction may be more successful than immediate induction for immature permanent teeth.
• Root development stage and etiology appear to be critical factors influencing treatment outcomes.
• Further research with larger sample sizes is necessary to draw definitive conclusions and refine treatment protocols.