Combination of a new ultrasonic tip with rotary systems for the preparation of flattened root canals

Tavares Karina Ines Medina Carita; Pinto Jáder Camilo; Santos-Junior Airton Oliveira; Esteves Torres Fernanda Ferrari; Guerreiro-Tanomaru Juliane Maria; Tanomaru-Filho Mario

doi:10.5395/rde.2021.46.e56

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저자정보: Tavares Karina Ines Medina Carita (Department of Restorative Dentistry São Paulo State University (UNESP) School of Dentistry Araraqua) Pinto Jáder Camilo (Department of Restorative Dentistry São Paulo State University (UNESP) School of Dentistry Araraqua) Santos-Junior Airton Oliveira (Department of Restorative Dentistry São Paulo State University (UNESP) School of Dentistry Araraqua) Esteves Torres Fernanda Ferrari (Department of Restorative Dentistry São Paulo State University (UNESP) School of Dentistry Araraqua) Guerreiro-Tanomaru Juliane Maria (Department of Restorative Dentistry São Paulo State University (UNESP) School of Dentistry Araraqua) Tanomaru-Filho Mario (Department of Restorative Dentistry São Paulo State University (UNESP) School of Dentistry Araraqua)

저널정보: 대한치과보존학회 Restorative Dentistry and Endodontics Restorative Dentistry and Endodontics 제46권 제4호

발행연도: 2021.11

수록면: 1 - 11 (11page)

DOI: 10.5395/rde.2021.46.e56

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Objectives: This study evaluated 2 nickel-titanium rotary systems and a complementary protocol with an ultrasonic tip and a small-diameter instrument in flattened root canals. Materials and Methods: Thirty-two human maxillary second premolars with flattened canals (buccolingual diameter ≥4 times larger than the mesiodistal diameter) at 9 mm from the radiographic apex were selected. The root canals were prepared by ProDesign Logic (PDL) 30/0.01 and 30/0.05 or Hyflex EDM (HEDM) 10/0.05 and 25/0.08 (n = 16), followed by application of the Flatsonic ultrasonic tip in the cervical and middle thirds and a PDL 25/0.03 file in the apical third (FPDL). The teeth were scanned using micro-computed tomography before and after the procedures. The percentage of volume increase, debris, and uninstrumented surface area were analyzed using the Kruskal-Wallis, Dunn, Wilcoxon, analysis of variance/Tukey, and paired and unpaired t-tests (α = 0.05). Results: No significant difference was found in the volume increase and uninstrumented surface area between PDL and HEDM (p > 0.05). PDL had a higher percentage of debris than HEDM in the middle and apical thirds (p < 0.05). The FPDL protocol resulted in less debris and uninstrumented surface area for PDL and HEDM (p < 0.05). This protocol, with HEDM, reduced debris in the middle and apical thirds and uninstrumented surface area in the apical third (p < 0.05). Conclusions: High percentages of debris and uninstrumented surface area were observed after preparation of flattened root canals. The HEDM, Flatsonic tip, and 25/0.03 instrument protocol enhanced cleaning in flattened root canals.

#Dental pulp cavity #Root canal preparation #Ultrasonic therapy #X-ray microtomography

참고문헌 (40)

참고문헌 신청

Barbizam JV / 2002 / Effectiveness of manual and rotary instrumentation techniques for cleaning flattened root canals / J Endod 28:365~366

Versiani MA / 2011 / Flat-oval root canal preparation with self-adjusting file instrument: a micro-computed tomography study / J Endod 37:1002~1007

Vasconcelos LRSM / 2017 / Effect of ultrasound streaming on the disinfection of flattened root canals prepared by rotary and reciprocating systems / J Appl Oral Sci 25:477~482

Filpo-Perez C / 2015 / Micro-computed tomographic analysis of the root canal morphology of the distal root of mandibular first molar / J Endod 41:231~236

Lacerda MFLS / 2017 / Cleaning and shaping oval canals with 3 instrumentation systems: a correlative micro-computed tomographic and histologic study / J Endod 43:1878~1884

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