Effect of Time Lapse between Endodontic and Periodontal Therapies on the Healing of Concurrent Endodontic-Periodontal Lesions without Communication: A Prospective Randomized Clinical Trial

By Gupta S, Tewari S, Tewari S, Mittal S

Date: 07/2020
Journal: JOE

Purpose: to check the hypothesis regarding the need for an observation period after the completion of endodontic treatment and before definitive periodontal therapy.

N= 31 patients


•80% of the sample were molars

•Treated and followed up from Dec 2012 to Oct 2014

•Inclusion and exclusion criteria specified, Baseline measurements recorded (PD, CAL, BOP, PI, PAI)

•teeth with established endo-perio lesions exhibiting <2 mm radiopaque bone between the periapical lesion and the periodontal destruction were also excluded.

•Double-blinded randomization

•Scaling done for patients, after 1 week baseline records collected and PAI score recorded.

•Groups were treated by endo/perio tx simultaneously or with 3 months apart and cases followed up •PD, CAL, BOP, PI were recorded, and PAI score recorded •

Most highlighted Results:  

1.Group 1 = 14 patients, Group 2 = 17 patients

2.More improvement in periodontal parameters in group 1 at the 3-month follow-up compared with group 2

3.At 3 and 6 months after SRP (3- and 6-month follow-up in group 1 and 6- and 9-month follow- up in group 2), both the groups showed a similar and consistent reduction in PD and a gain in CAL

4.An improvement in the PAI score was observed in 100% of cases in both groups


-Within the limits of this study, it can be concluded that no significant difference in periodontal healing was found between simultaneous and delayed periodontal treatment groups after endodontic treatment on the periodontal healing of concurrent endodontic-periodontal lesions without communication. (difference in 3 months recall only, but afterwards all were similar)