SEM Analysis of MTAD Efficacy for Smear Layer Removal from Periodontally Affected Root Surfaces

Abstract

Objective: Biopure® MTAD (Dentsply Tulsa Dental, USA) has been developed
as a final irrigant following root canal shaping to remove intracanal smear layer.
Many of the unique properties of MTAD potentially transfer to the conditioning
process of tooth roots during periodontal therapy. The aim of this ex vivo study
was to evaluate the effect of MTAD on the removal of smear layer from root surfaces.
Materials and Methods: Thirty two longitudinally sectioned specimens from 16
freshly extracted teeth diagnosed with advanced periodontal disease were divided
into four groups. In group 1 and 2, the root surfaces were scaled using Gracey curettes.
In group 3 and 4, 0.5 mm of the root surface was removed using a fissure
bur. The specimens in group 1 and 3 were then irrigated by normal saline. The
specimens in groups 2 and 4 were irrigated with Biopure MTAD.
All specimens were prepared for SEM and scored according to the presence of
smear layer.
Results: MTAD significantly increased (P=0.001) the smear layer removal in
both groups 2 and 4 compared to the associated control groups, in which only saline
was used.
Conclusion: MTAD increased the removal of the smear layer from periodontally
affected root surfaces. Use of MTAD as a periodontal conditioner may be suggested.