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Alterations of the Danger Zone after Preparation of Curved Root Canals Using WaveOne with Reverse Rotation or Reciprocation Movements.

Shantiaee Y, Dianat O, Paymanpour P, Nahvi G, Ketabi MA, Kolahi Ahari G - Iran Endod J (2015)

Bottom Line: Data was analyzed using the repeated measures ANOVA test.There was no statistically significant difference between two experimental groups in terms of remaining dentin thickness at 2 and 4 mm levels below the highest point of the furcation (P>0.05).The efficacy of WaveOne instrument on changes of the dentin thickness in the DZ was not affected by different file movements.

View Article: PubMed Central - PubMed

Affiliation: Iranian Center for Endodontic Research, Research Institute of Dental sciences, Department of Endodontics, Dental School , Shahid Beheshti University of Medical Sciences, Tehran, Iran ;

ABSTRACT

Introduction: The aim of this study was to compare the changes that occur in the danger zone (DZ) after preparation of curved mesiobuccal (MB) canals of mandibular first molars with WaveOne instruments in two different movements [reciprocation (RCP) and counter-clockwise rotation (CCWR)] by means of cone-beam computed tomography (CBCT).

Methods and materials: MB canals of 30 mandibular molars were randomly divided into 2 groups (n=15); WaveOne/RCP and WaveOne/CCWR. Pre- and post-instrumentation CBCT images were assessed for changes in the dentin thickness in DZ (2 and 4 mm below the highest point of the root furcation) in both groups. Data was analyzed using the repeated measures ANOVA test.

Results: There was no statistically significant difference between two experimental groups in terms of remaining dentin thickness at 2 and 4 mm levels below the highest point of the furcation (P>0.05).

Conclusion: The efficacy of WaveOne instrument on changes of the dentin thickness in the DZ was not affected by different file movements.

No MeSH data available.


The error bar of the mean values of changes in the dentin thickness in safety zone in 2 and 4 mm sections [confidence interval (CI)=95%]
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Figure 3: The error bar of the mean values of changes in the dentin thickness in safety zone in 2 and 4 mm sections [confidence interval (CI)=95%]

Mentions: The results showed that the remaining dentin thickness in both instrumentation techniques was not significantly different in two sections (2 and 4 mm apical to the furcation highest point) both in DZ and safety zone (P>0.05) (Figures 2 and 3 and Table 1). No instrument fracture was reported in this study.


Alterations of the Danger Zone after Preparation of Curved Root Canals Using WaveOne with Reverse Rotation or Reciprocation Movements.

Shantiaee Y, Dianat O, Paymanpour P, Nahvi G, Ketabi MA, Kolahi Ahari G - Iran Endod J (2015)

The error bar of the mean values of changes in the dentin thickness in safety zone in 2 and 4 mm sections [confidence interval (CI)=95%]
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4509121&req=5

Figure 3: The error bar of the mean values of changes in the dentin thickness in safety zone in 2 and 4 mm sections [confidence interval (CI)=95%]
Mentions: The results showed that the remaining dentin thickness in both instrumentation techniques was not significantly different in two sections (2 and 4 mm apical to the furcation highest point) both in DZ and safety zone (P>0.05) (Figures 2 and 3 and Table 1). No instrument fracture was reported in this study.

Bottom Line: Data was analyzed using the repeated measures ANOVA test.There was no statistically significant difference between two experimental groups in terms of remaining dentin thickness at 2 and 4 mm levels below the highest point of the furcation (P>0.05).The efficacy of WaveOne instrument on changes of the dentin thickness in the DZ was not affected by different file movements.

View Article: PubMed Central - PubMed

Affiliation: Iranian Center for Endodontic Research, Research Institute of Dental sciences, Department of Endodontics, Dental School , Shahid Beheshti University of Medical Sciences, Tehran, Iran ;

ABSTRACT

Introduction: The aim of this study was to compare the changes that occur in the danger zone (DZ) after preparation of curved mesiobuccal (MB) canals of mandibular first molars with WaveOne instruments in two different movements [reciprocation (RCP) and counter-clockwise rotation (CCWR)] by means of cone-beam computed tomography (CBCT).

Methods and materials: MB canals of 30 mandibular molars were randomly divided into 2 groups (n=15); WaveOne/RCP and WaveOne/CCWR. Pre- and post-instrumentation CBCT images were assessed for changes in the dentin thickness in DZ (2 and 4 mm below the highest point of the root furcation) in both groups. Data was analyzed using the repeated measures ANOVA test.

Results: There was no statistically significant difference between two experimental groups in terms of remaining dentin thickness at 2 and 4 mm levels below the highest point of the furcation (P>0.05).

Conclusion: The efficacy of WaveOne instrument on changes of the dentin thickness in the DZ was not affected by different file movements.

No MeSH data available.