A Comparison of Ni-Ti Rotary and Hand Files Instrumentation in Primary Molars

Bugra Ozen; Ozlem Marti Akgun

A Comparison of Ni-Ti Rotary and Hand Files Instrumentation in Primary Molars

Year 2013, Volume: 6 Issue: 1, 6 - 8, 01.03.2013

Abstract

The aim of the study was to compare the manual and rotary endodontic instruments focusing on risk of perforation when the whole root canal length is instrumented as well as the time required for preparation in primary teeth Fifty four teeth were divided randomly into three groups.Group I: The root canals were prepared manually with K-files. Group II : ProTaper instruments were used in a crown-down manner, Group III: The root canals was prepared with the Hero 642 system. The perforations were made by Hero 642 was %22 and there was no significant differences between groups (P>0.05). Also there was no significant differences between primary maxillary and mandibular teeth (P>0.05) according to perforations.For maxillary and mandibular teeth, the longest time shaping time was recorded when manual technique was used (p<0.05). Also, no statistically difference was found between ProTaper and Hero 642 according to time. Finally, there was statistically significant difference between rotary and manuel techniques for time of instrumentation (p<0.05). Care must be taken with each rotary file, for overpreparation can lead to unexpected lateral perforation, especially in severely curved canals. Rotary preparation for primary teeth was faster than hand preparation and this is very important for shorten the chairtime in pediatric dentistry. Experimental article (J Int Dent Med Res 2013; 6: (1), pp. 6-8)

Keywords

Ni-Ti Rotary and Hand Files, Instrumentation.

References

Schilder H. Cleaning and shaping the root canal. Dent Clin North Am 1974;18:269-96.
Cohen S, Hargreaves KM: Pathways of the Pulp,9th Edition. St. Louis: Mosby; 2006: pp. 301-11, 842.
Kummer TR, Cordeiro MMR, Rocha MJC. Ex vivo study of manual and rotary instrumentation techniques in human primary teeth. Oral Surg Oral Med Oral Pathol 2008;105:e84-e92 Moghaddam KN, Mehran M, Zadeh HF. Root canal cleaning efficacy of rotary and hand files instrumentation in primary molars. IEJ 2009;4:53-7.
Kuo CI, Wang YL, Chang HH, Huang GF, Lin CP, Li UM, Guo MK. Application of Ni-Ti rotary files for pulpectomy in primary molars. J Dent Sci 2006;1:10-5.
Barr ES, Kleier DJ, Barr NV. Use of nickel-titanium rotary files for root canal preparation in primary teeth. Pediatr Dent 1999;21:453-4.
Barr ES, Kleier DJ, Barr NV. Use of nickel-titanium rotary files for root canal preparation in primary teeth. Pediatr Dent 2000;22:77-8.
Silva LA, Leonardo MR, Nelson-Filho P, Tanomaru JM. Comparison of rotary and manual instrumentation techniques on cleaning capacity and instrumentation time in deciduous molars. J Dent Child (Chic) 2004;71:45-7.
Guelzow A, Stamm O, Martus P, Kielbassa AM. Comparative study of six rotary nickel –titanium systems and hand instrumentation for root canal preparation. Int Endod J 2005;38:743-52
Prove SA, Symons AL, Meyers IA. Physiological root resorption of primary molars. J Clin Pediatr Dent 1992;16:202-6.
Daito M, Kawahara S, Kato M, Okamoto K, Imai G, Hieda T. Radiographic observations on root resorption in the primary dentition. J Osaka Dent Univ 1991;25:1-23.