Comparative Analysis of Manual, Rotary and Reciprocal Systems on Primary Teeth Root Canals: An In Vitro Scanning Electron Microscopy Study

Abstract

Objective: To evaluate the residual debris and smear layer formation, and also preparation time of one or multifile manual, rotary, and reciprocal systems on primary teeth. Materials and methods:A total of 75 primary mandibular molar teeth were randomly divided to five groups (n=15). The distal canals of teeth were shaped with each of the K file, Protaper, Twisted File, OneShape, and Reciproc systems. Preparation time was also recorded. Longitudinal sections groups were prepared and processed for observation under scanning electron microscopy (SEM) at a standard magnification of X1000 for smear layer and X200 for residual debris. The presence of smear layer and residual debris was evaluated by two trained operators. The data of preparation time and also debris and smear scores were analyzed using ANOVA and the Kruskal-Wallis test, respectively.Results: Reciproc and OneShape systems had significantly less instrumentation time than all other groups (p<0.001). The results of statistical analyses were the same for the residual debris and smear layer scores. In the coronal thirds of the canals, the canal preparation with the Protaper system resulted in significantly less debris and smear layer compared with the OneShape system (p=0.015). In the middle thirds of the canals, OneShape and Reciproc systems had more residual debris and smear layer than the Protaper system (p<0.05). In the apical thirds of the canals, the use of the Protaper instruments resulted in less debris and smear layer than the Reciproc system (p=0.034). Conclusions:Within the limits of this study, the Protaper system, which showed better cleaning efficacy and was also faster than the manual system, can be an effective alternative to other systems in the root canal treatment of primary molars. More in vitro and clinical investigations are needed on root canal treatment of primary teeth.

Using a Dental Operating Microscope in the Treatment of Reversible Pulpitis in Primary Teeth

“…In this case the intention is to avoid unwanted exposure of the pulp and endodontic treatment which is risky for primary teeth with advanced root resorption. [11][12][13][14][15][16] Comparative studies have been carried out over the last years on the precision, sensitivity and specificity of various methods for assessing the residual dentin during cavity preparation . Its features play a crucial role in the healing process.…”

Root Canal Morphology of Mandibular Primary Molars: A Micro-CT Study

“…It was clearly known that fundamentally the main philosophy of a root canal treatment is filling all the spaces from which pulp removal was done in the root canal following shaping and cleaning procedures. [1][2][3] From this point of view, it is necessary to have an idea about all the internal morphological diversity in the root canal system where the pulp is likely to occupy space. 1 Root canal treatment consists of access cavity preparation and determination of working length, followed by chemo-mechanical preparation and obturation of root canal system in both dentitions.…”

Micro‐CT evaluation of ‘danger zone’ and microcrack formation in mesial root canals of primary teeth with single‐file rotary and reciprocating systems

“…[13][14][15] Although the most systems on the market are mostly used with the principle of full clockwise rotation (360⁰), [15][16][17][18][19] systems operating with reciprocating motion have been introduced to the market with the claim that they alleviate the stress on the canal files and root dentin. [17][18][19][20][21][22][23] In recent years, single-file systems have been used in primary teeth with both full-round rotation and reciprocal motion kinematics. [16][17][18][19][20][21][22][23][24][25] They have gained popularity with advantages such as shortening the time required for treatment, being easily learned and applied, providing cost-effectiveness, and reducing the potential for cross-contamination between canals.…”

“…[17][18][19][20][21][22][23] In recent years, single-file systems have been used in primary teeth with both full-round rotation and reciprocal motion kinematics. [16][17][18][19][20][21][22][23][24][25] They have gained popularity with advantages such as shortening the time required for treatment, being easily learned and applied, providing cost-effectiveness, and reducing the potential for cross-contamination between canals. [16][17][18][19][20][21][22][23][24][25] One Shape® (OS; Micro-Mega, Besancon, France) is one of the single-file clockwise systems.…”

“…[16][17][18][19][20][21][22][23][24][25] They have gained popularity with advantages such as shortening the time required for treatment, being easily learned and applied, providing cost-effectiveness, and reducing the potential for cross-contamination between canals. [16][17][18][19][20][21][22][23][24][25] One Shape® (OS; Micro-Mega, Besancon, France) is one of the single-file clockwise systems. There are few studies evaluating various parameters in primary teeth.…”