Objective
The aim of the study was to determine the relationship between preoperative buccal
plate thickness (BPT) and radiographic healing at the osteotomy site after endodontic
microsurgery (EMS) with and without guided tissue regeneration (GTR) using cone beam
computed tomography (CBCT) imaging.
Study Design
The retrospective sample of 143 individuals who had EMS with pre- and postoperative
CBCT scans available were divided into 2 groups: group 1 (GTR) and group 2 (no GTR),
which were further divided into teeth where BPT was >1.0 mm or ≤1.0 mm. Bone healing
was assessed by subjective evaluation of bone formation at the resected root surface
(I1), periapical bone formation (I2), cortical plate formation (I3), and a derived index (Author2-Author1 Indices) (I4), calculated by a composite score of I1 and I2.
Results
There was no significant impact on surgical healing with the use of GTR when BPT is
>1.0 mm. The GTR had a significant impact on surgical healing when the BPT was ≤1.0
mm.
Conclusions
This study supported the use of CBCT to evaluate three-dimensional healing after EMS.
The Author2-Author1 index was found to be a clinically relevant method for assessing
healing. To improve healing rate, the EMS cases with a preoperative BPT of ≤1.0 mm
may benefit from GTR.
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Article info
Publication history
Published online: July 14, 2022
Accepted:
July 5,
2022
Received in revised form:
June 18,
2022
Received:
March 9,
2022
Identification
Copyright
© 2022 Elsevier Inc. All rights reserved.
