The Effect of Automatic Rotational Canal Preparation Technique Compared to the Alternating Technique on the Degree of Curvature in Curved Canals )in Vitro Study)
الملخص
The canals of dental roots are generally characterized by a degree of curvature and the presence of a straight root with a straight canal is exceptional because most natural teeth show curves in their roots, therefore the original shape of the canal must be preserved to maintain the mechanical resistance of the root.
Objectives of Research: The study aims to determine the effect of the preparation system on the degree of curvature in curved canals.
Materials and Methods: The research sample consisted of 22 recently extracted single-rooted teeth with single canals their length had been standardized to be 16 mm from the apex, then randomly divided into two equal groups (11 teeth for each group) according to the adopted preparation system and the degree of curvature (15-30) as follows: Group I and Group II were fixed with a mixture of acryl, sawdust, and gypsum inside a plastic mold until complete solidification, then a CBCT image was taken pre-preparation and the Schneider method was adopted to measure the degree of curvature for each canal in the longitudinal section (medial-lateral.
A CBCT image was taken post-preparation to measure the magnitude of change in the curvature of the canal. The results were analyzed using a Student (T) test for independent samples.
The results showed that the alternating preparation system preserved the curvature better than the continuous rotary preparation system, and based on the data it can be concluded that it is preferable to use the alternating system in preparing curved canals.
References
• COHEN, S. & HARGREAVES, K. M. 2006. Pathways of the Pulp, Elsevier Mosby.
• HARGREAVES, K. M. & BERMAN, L. H. 2015. Cohen's Pathways of the Pulp, Elsevier.
• HARGREAVES, K. M. & BERMAN, L. H. 2016. Cohen's pathways of the pulp.
• INGLE, J. & BAKLAND, L. K. 2002. Endodontics, BC Decker.
• INGLE, J. I., BAKLAND, L. K. & BAUMGARTNER, J. C. 2008. Ingle's Endodontics 6, BC Decker.
• NP, C. 2010. Harty’s endodontics in clinical practice 6th ed.
• MITCHELL, D. A. & MITCHELL, L. 2014. Oxford Handbook of Clinical Dentistry, OUP Oxford.
• Journal of endodontics.
• Ponce EH& Vilar Fernandez JA: The cemento-dentino-canal junction, the apical foramen, and the apical constriction: evaluation by optical microscopy. J Endod 29(3):214, 2003
• using rotary nickel-titanium files. J Endod.
• THOMPSON, S. A. & DUMMER, P. M. 1997. Shaping ability of ProFile.04 Taper Series 29 rotary nickel-titanium instruments in simulated root canals. Part 1. Int Endod J, 30, 1-7.
• THOMPSON, S. A. & DUMMER, P. M. 2000. Shaping ability of Hero 642 rotary nickel-titanium instruments in simulated root canals: Part 2. Int Endod J, 33, 255-61.
• VARELA-PATIŇO P, MARTIN BIEDMA B, RODRIGUEZ N, CANTATORE G, MALENTACA A & M., R.-P. 2008 .Fracture rate of nickel-titanium instruments using continuous versus alternating rotation. Endodontic Practice Today
• SATTAPAN, B., PALAMARA, J. E. & MESSER, H. H. 2000. Torque during canal instrumentation using rotary nickel-titanium files. J Endod, 26, 156-60.
• William T Johnson James C and Kulild M Obturation of the cleaned and shaped root canal system. In: Stephen Cohen Kenneth M. Hargreaves, Pathway of the Pulp. 10th ed. St. Louis, Missour, Mosby Elsevier. 2011,349-388
• SCHILDER, H. 1974. Cleaning and shaping the root canal. Dent Clin North Am, 18, 269-96.
• SILVA, E., VIEIRA, V. T. L., HECKSHER, F., DOS SANTOS OLIVEIRA, M. R. S., DOS SANTOS ANTUNES, H. & MOREIRA, E. J. L. 2018. Cyclic fatigue using severely curved canals and torsional resistance of thermally treated reciprocating instruments. Clin Oral Investig, 22, 2633-2638.
• FIDLER, A. 2014. Kinematics of 2 reciprocating endodontic motors: the difference between actual and set values. J Endod, 40, 990-4.
• DE-DEUS, G., SILVA, E. J., VIEIRA, V. T ،.BELLADONNA, F. G., ELIAS, C. N., PLOTINO, G. & GRANDE, N. M. 2017. Blue Thermomechanical Treatment Optimizes Fatigue Resistance and Flexibility of the Reciproc Files. J Endod, 43, 462-466.
• DE-DEUS, G., BRANDAO, M. C., BARINO, B., DI GIORGI, K., FIDEL, R. A. & LUNA, A. S. 2010. Assessment of apically extruded debris produced by the single-file ProTaper F2 technique under reciprocating movement. Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 110, 390-4.
• BURKLEIN, S., HINSCHITZA, K., DAMMASCHKE, T. & SCHAFER, E. 2012. Shaping ability and cleaning effectiveness of two single-file systems in severely curved root canals of extracted teeth: Reciproc and WaveOne versus Mtwo and ProTaper. Int Endod J, 45, 449-61.
• Berutti E, Negro AR, Lendini M, Pasqualini D: Influence of manual preflaring and torque on the failure rate of ProTaper rotary instruments, J Endod 30:4, pp. 228-230, 2004
• Hannig. C, Dullin. C. Hülsmann M, Heidrich. G 2005- Three-dimensional , nondestructive visualization of vertical root fractures using flat panel volume detector computer tomography: an ex vivo in vitro case report
• Cotti E, Vargiu P, Dettori C, Mallarini G 1999- Computerized tomography in management and follow-up of extensive periapical lesion. Endodontics and Dental Traumatology 15, 186-9.
• Standerwick RG. A possible etiology for the dilaceration and flexion of permanent tooth roots relative to bone remodeling gradients in alveolar bone. Dent Hypotheses [serial online] 2014 [cited 2014 Mar 3];5:7-10.
• Hage W, Zogheib C, Bukiet F, Sfeir G, Khalil I, Gergi R, Naaman A. Canal Transportation and Centring Ability of Reciproc and Reciproc Blue With or Without Use of Glide Path Instruments: A CBCT Study. Eur Endod J. 2020 May 14;5(2):118-122.
• Kabil E, Katić M, Anić I, Bago I. Micro-computed Evaluation of Canal Transportation and Centering Ability of 5 Rotary and Reciprocating Systems with Different Metallurgical Properties and Surface Treatments in Curved Root Canals. J Endod. 2021 Mar;47(3):477-484.
• Silva RV, Alcalde MP, Horta MC, Rodrigues CT, Silveira FF, Duarte MA, Nunes E. Root canal shaping of curved canals by Reciproc Blue system and Pro Taper Gold: A micro-computed tomographic study. J Clin Exp Dent. 2021 Feb 1;13(2):e112-e118.
• Bürklein S, Flüch S, Schäfer E. Shaping ability of reciprocating single-file systems in severely curved canals: WaveOne and Reciproc versus WaveOne Gold and Reciproc Blue. Odontology. 2019 Jan;107(1):96-102
• الحلبية، ح. 2018 . مداواة الأسنان اللبية، منشورات جامعة حماة.
• العفيف ، هـ 2016 مداواة الأسنان اللبية ، منشورات جامعة دمشق .
• عفوف 2011، ج مداواة الأسنان اللبية ، منشورات جامعة البعث .
