214 - LSTR Outcomes With and Without Baseline Radiographic Bony Changes

Purpose:

This study evaluated the clinical and radiographic success of lesion sterilization and tissue repair (LSTR) therapy in primary molars based on the presence or absence of baseline radiographic bony changes (RBC).

Methods:

In this retrospective review, 50 LSTR-treated teeth were divided into two groups based on the presence/absence of baseline RBC. Variables extracted from the records included gender, arch, tooth type, and presenting clinical and radiographic signs and symptoms. Clinical and radiographic outcomes, including previously reported adverse events, were evaluated at recall appointments (6-42 months). Groups were evaluated using Student’s t-tests and Fisher exact tests (p < .05).

Results:

Thirty-seven LSTR-treated teeth with appropriate follow-up data were evaluated, 19 with RBC and 18 without RBC. At baseline, the only difference between the groups was that the teeth in the RBC group were more frequently diagnosed as necrotic (P=.02). At 6 months (n=30), the non-RBC group showed no significant change in clinical signs, while the RBC group demonstrated fewer clinical symptoms (P=.04) and significant radiographic improvement (P < .001). At 12 months (n=16) radiographic improvement persisted in the RBC group (P < .001), with significant intergroup differences (P=.01). In the RBC group, 2 treatments failed (10.5%) and 1 showed signs of delayed eruption with ectopic eruption of the succedaneous tooth. No failures or adverse signs were noted in the non-RBC group.

Conclusions:

LSTR demonstrated high clinical and radiographic success irrespective of the presence of initial radiographic bony changes, supporting its use in primary molars regardless of preoperative bony status.