Acta Scientific Dental Sciences (ASDS)(ISSN: 2581-4893)

Research Article Volume 6 Issue 3

Effect of Continuous and Reciprocating File Motion on Microcrack Formation in Root Canals During Retreatment: A SEM Study

Aishwarya Singh1* and Rahul Maria2

1Post Graduate Student, Department of Conservative Dentistry and Endodontics, Bhabha College of Dental Sciences, India
2Professor and HOD, Department of Conservative Dentistry and Endodontics, Bhabha College of Dental Sciences, India

*Corresponding Author: Aishwarya Singh, Post Graduate Student, Bhabha College of Dental Sciences, Bhopal, Madhyapradesh, India.

Received: February 07, 2022; Published: February 17, 2022


Aim: The aim of this study is to compare microcrack formation and propagation in apical one third of root after retreatment, while using two different retreatment files.

Material and Methodology: A total of 50 human mandibular premolar teeth with straight root canals were selected and coronal third enlargement done with one flare. The biomechanical preparation of the teeth were done using Protaper Next rotary files X1 and X2. Obturated using gutta-percha with AH Plus sealer by lateral condensation technique. The samples were divided into two retreatment groups -Group I- Protaper Universal Retreatment file system and Group II-Wave One Gold primary File. Then microcracks were assessed using scanning electron microscope. The data were statistically analysed using Pearson Chi square test, Odd’s ratio and Relative risk/Risk ratio.

Results: After retreatment, microcracks are present in both the groups. The PTUR system caused significantly more microcracks than the Wave one gold file system in the apical one third of root.

Conclusion: Within the limitations of present study, continuous motion file group produced significantly more percentage of incidence and propagation of dentinal microcracks as compared to reciprocation motion file group.

Keywords: Apical Microcracks; Continuous; Protaper Universal Retreatment File; Reciprocation; Retreatment; Wave One Gold File


  1. Vignoletti F., et al. “Surgical protocols for ridge preservation after tooth extraction. A systematic review”. Clinical Oral Implants Research 23 (2012): 22-38.
  2. Maeda T., et al. “Statins augment vascular endothelial growth factor expression in osteoblastic cells via inhibition of protein prenylation”. Endocrinology 144 (2003): 681-692.
  3. Staal A., et al. “The ability of statins to inhibit bone resorption is directly related to their inhibitory effect on HMG-CoA reductase activity”. Journal of Bone and Mineral Research 18 (2003): 88-96.
  4. Terblanche M., et al. “Statins and Sepsis: Multiple modifications at multiple levels”. The Lancet Infectious Diseases 5 (2007): 358-336.
  5. Wang JW., et al. “Locally applied simvastatin promotes fracture healing in ovariectomized rat”. Osteoporosis International 12 (2007): 1641-1650.
  6. Temmerman A., et al. “The use of leucocyte and platelet-rich fibrin in socket management and ridge preservation: a split-mouth, randomized, controlled clinical trial”. Journal of Clinical Periodontology 11 (2016): 990-999.
  7. Oncu E., et al. “Positive effect of platelet rich fibrin on osseointegration”. Medicina Oral Patologia Oral y Cirugia Bucal 5 (2016): e601-e607.
  8. Dohan DM., et al. “Plateletrich fibrin (PRF): A second-generation platelet concentrate. Part II: Platelet-related biologic features”. Oral Surgery, Oral Medicine, Oral Pathology, and Oral Radiology 3 (2006): e45-50.
  9. Schar MO., et al. “Platelet-rich concentrates differentially release growth factors and induce cell migration in vitro”. Clinical Orthopaedics and Related Research 5 (2015): 1635-1643.
  10. Lekovic V., et al. “Preservation of alveolar bone in extraction sockets using bioabsorbable membranes”. The Journal of Periodontology 9 (1998): 1044-1049.
  11. Becker W., et al. “A comparison of demineralized freeze- dried bone and autologous bone to induce bone formation in human extraction sockets”. The Journal of Periodontology 4 (1994): 309.
  12. Dohan DM., et al. “Plateletrich fibrin (PRF): A second-generation platelet concentrate.Part I: Technological concepts and evolution”. Oral Surgery, Oral Medicine, Oral Pathology, and Oral Radiology 101 (2006): E37-44.
  13. Pradeep AR., et al. “Clinical Efficacy of Subgingivally Delivered 1.2% Atorvastatin in Chronic Periodontitis: A Randomized Controlled Clinical Trial”. The Journal of Periodontology 84 (2013): 871-879.
  14. Haghighat A., et al. “Radiographic Evaluation of Bone Formation and Density Changes after Mandibular Third Molar Extraction: A 6 Month Follow up”. Journal of Dental Research 1 (2011): 1-5.
  15. Tan WL., et al. “A systematic review of post-extractional alveolar hard and soft tissue volumeral changes in humans”. Clinical Oral Implants Research 5 (2012): 1-21.
  16. Pang C., et al. “Alveolar ridge preservation with deproteinized bovine bone graft and collagen membrane and delayed implants”. Journal of Craniofacial Surgery 5 (2014): 1698-1702.
  17. Avila-Ortiz G., et al. “Effect of alveolar ridge preservation after tooth extraction: a systematic review and metaanalysis”. Journal of Dental Research 10 (2014): 950-958.
  18. Osburn RC. “Preservation of the alveolar ridge: a simplified technique for retaining teeth beneath removable appliances”. Journal of the Indiana Dental Association 1 (1974): 8-11.
  19. Artzi Z and Nemcovsky CE. “The application of deproteinized bovine bone mineral for ridge preservation prior to implantation. Clinical and histological observations in a case report”. The Journal of Periodontology 9 (1998): 1062-1067.
  20. Cardaropoli D., et al. “Relationship between the buccal bone plate thickness and the healing of post extraction sockets with/without ridge preservation”. International Journal of Periodontics and Restorative Dentistry 2 (2014): 211-217.
  21. Goes P., et al. “Effect of Atorvastatin in radiographic density on alveolar bone loss in wistar rats”. Brazilian Dental Journal 3 (2010): 193-198.
  22. Fickl S., et al. “Hard tissue alterations after socket preservation with additional buccal overbuilding: a study in the beagle dog”. Journal of Clinical Periodontology 10 (2009): 898-904.
  23. Barone A., et al. “Tissue changes of extraction sockets in humans: a comparison of spontaneous healing vs. ridge preservation with secondary soft tissue healing”. Clinical Oral Implants Research 11 (2013): 1231-1237.
  24. Barone A., et al. “Extraction socket healing in humans after ridge preservation techniques: comparison between flapless and flapped procedures in a randomized clinical trial”. The Journal of Periodontology 1 (2014): 14-23.
  25. Guarnieri R., et al. “Extraction Socket Preservation Using Porcine-Derived Collagen Membrane Alone or Associated with Porcine-Derived Bone. Clinical Results of Randomized Controlled Study”. Journal of Oral and Maxillofacial Research: JOMR 3 (2017): e5.
  26. De Risi V., et al. “Alveolar ridge preservation techniques: a systematic review and meta-analysis of histological and histomorphometrical data”. Clinical Oral Implants Research 1 (2015): 50-68.
  27. El-Hamid SA., et al. “Socket Preservation Using Atorvastatin Loaded in Growth Factor Plasma Rich Fibrin Scaffold: A Randomized Clinical Trial”. Natural Sciences 7 (2018): 82-91.
  28. Martande SS., et al. “Platelet-Rich Fibrin Combined With 1.2% Atorvastatin for Treatment of Intrabony Defects in Chronic Periodontitis: A Randomized Controlled Clinical Trial”. The Journal of Periodontology 9 (2016): 1039-1046.


Citation: Aishwarya Singh and Rahul Maria. “Effect of Continuous and Reciprocating File Motion on Microcrack Formation in Root Canals During Retreatment: A SEM Study". Acta Scientific Dental Sciences 6.3 (2022): 44-50.


Copyright: © 2022 Aishwarya Singh and Rahul Maria. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


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