Evaluation of the Smear Layer Removal Ability of Various Rotary Files with/without Chemical Agents on Primary Teeth: An In Vitro Study
AlWaleed Abushanan
Keywords :
Chemical agents, Primary teeth, Rotary files, Smear layer
Citation Information :
Abushanan A. Evaluation of the Smear Layer Removal Ability of Various Rotary Files with/without Chemical Agents on Primary Teeth: An In Vitro Study. J Contemp Dent Pract 2024; 25 (4):354-357.
Aim: The aim of the current study was to assess the cleaning and smear layer removal efficacy of two different rotary files with or without chemical agents on primary teeth.
Materials and methods: For the study, 90 extracted primary maxillary incisors without internal or external resorption and with at least two-thirds of complete roots were chosen. Then, based on the kind of instruments used to clean and shape the canals, they were randomly assigned to three experimental groups, each consisting of 30 teeth. Group-I: The canal was instrumented manually with K-files, Group-II: The canal was instrumented with Kedo-S files, Group-III: The canal was instrumented with Kedo-SG Blue files. After the canals were finally instrumented, 2 mL of QMixTM solution was used to irrigate 15 samples from each group. The samples were subsequently allowed to remain in the canals for 90 seconds in order to eliminate the smear layer. After that a stereomicroscope was used to assess the cleaning effectiveness.
Results: With irrigant solution, the highest mean value was found in manual K-files (2.86 ± 0.34), followed by Kedo-S files group (1.34 ± 0.26) and Kedo-SG Blue files (1.28 ± 0.18). Without irrigant solution, the highest mean value was found in manual K-files (2.92 ± 0.22) followed by Kedo-S files group (1.44 ± 0.18) and Kedo-SG Blue files (1.36 ± 0.14). There was a statistically significant difference found at all the three levels.
Conclusion: On conclusion, the current study's findings demonstrated that irrigation solution was significantly more effective in cleaning and removing smear layers from pediatric rotary files than manual K-files.
Clinical significance: The effectiveness of endodontic therapy depends on a successful chemomechanical preparation. The canals are instrumented using either hand files or rotary instruments; there are several irrigation and instrumentation techniques. In order to completely sterilize the canals, chemical agents are utilized for irrigation during instrumentation. Due to their numerous biological, antibacterial, anti-inflammatory, and antioxidant qualities, many natural compounds are also utilized as irrigants.
Kargül B, Tanboga I, Altinok B. Conventional endodontic treatment of primary molars using metronidazole as an intra-canal medicament: A pilot study. Eur Arch Paediatr Dent 2010;11(4):196–200. DOI: 10.1007/BF03262744.
Farhin K, Devendra P, Jitesh P, et al. Application of rotary instrumentation in endodontics: A review. Int J Prev Clin Dent Res 2014;1:48–52. Available from: https://www.researchgate.net/publication/353339414_Application_of_Rotary_Instrumentation_in_Paediatric_Endodontics_-A_Review.
Peters CA, Barbakow F. Effect of irrigation on debris and smear layer on canal walls prepared by two rotary techniques: A scanning electron microscopic study. J Endod 2000;25:6–10. DOI: 10.1097/00004770-200001000-00002.
Ullmann CJ, Peters OA. Effect of cyclic fatigue on static fracture loads in ProTaper nickel-titanium rotary instruments. J Endod 2005;31: 183–186. DOI: 10.1097/01.don.0000137641.87125.8f.
Kalita S, Agarwal N, Jabin Z, et al. Comparative evaluation of cleaning capacity and efficiency of Kedo-S pediatric rotary files, rotary ProTaper, and Hand K Files in primary molar pulpectomy. Int J Clin Pediatr Dent 2021;14(3):383–387. DOI: 10.5005/jp-journals-10005- 1958.
Kaushik H, Singhal R, Kakram A, et al. Rotary file systems designed exclusively for pediatric patients: A literature review. Int J Health Sci Res 2023;13(7):212–216. DOI: 10.52403/ijhsr.20230730.
Ma J, Wang Z, Shen Y, et al. A new noninvasive model to study the effectiveness of dentin disinfection by using confocal laser scanning microscopy. J Endod 2011;37:1380–1385. DOI: 10.1016/j.joen.2011.06.018.
Nerkar R, Yadav S, Metita V, et al. Root canal preparation in in primary teeth: A review. J Adv Oral Res 2015;6(2):1–4. DOI: 10.1177/22294112 20150201.
Gavini G, Santos MD, Caldeira CL, et al. Nickel-titanium instruments in endodontics: A concise review of the state of the art. Braz Oral Res 2018;32:e67. DOI: 10.1590/1807-3107bor-2018.vol32.0067.
Kuo C, Wang Y, Chang H, et al. Application of Ni-Ti rotary files for pulpectomy in primary molars. J Dent Sci 2006;1:10–15. DOI: 10.30086/JDS.200603.0002.
Barr ES, Kleier DJ, Barr NV. Use of nickel-titanium rotary files for root canal preparation in primary teeth. Pediatr Dent 1999;21(7):453–454. PMID: 10633522.
del Fabbro M, Afrashtehfar KI, Corbella S, et al. In vivo and in vitro effectiveness of rotary nickel-titanium vs manual stainless steel instruments for root canal therapy: Systematic review and meta-analysis. J Evid Based Dent Pract 2018;18(1):59–69. DOI: 10.1016/j.jebdp.2017.08.001.
Priyadarshini P, Jeevanandan G, Govindaraju L, et al. Clinical evaluation of instrumentation time and quality of obturation using paediatric hand and rotary file systems with conventional hand K-files for pulpectomy in primary mandibular molars: A double-blinded randomized controlled trial. Eur Arch Paediatr Dent 2020;21:693–701. DOI: 10.1007/s40368-020-00518-w.
Jeevanandan G, Thomas E. Volumetric analysis of hand, reciprocating and rotary instrumentation techniques in primary molars using spiral computed tomography: An in vitro comparative study. Eur J Dent 2018;12(1):21–26. PMID: 29657521.
Kour G, Masih U, Dhindsa A, et al. Comparative clinical and microbial evaluation of two endodontic file systems and irrigating solutions in pediatric patients. Contemp Clin Dent 2018;9:637–643. DOI: 10.4103/ccd.ccd_543_18.
