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Ultrasonic root‐end preparation with smooth and diamond‐coated tips
Author(s) -
Zuolo M. L.,
Perin F. R.,
Ferreira M. O. F.,
Faria F. P.
Publication year - 1999
Publication title -
dental traumatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 81
eISSN - 1600-9657
pISSN - 1600-4469
DOI - 10.1111/j.1600-9657.1999.tb00785.x
Subject(s) - bevel , smear layer , scanning electron microscope , root canal , materials science , molar , dentistry , ultrasonic sensor , gutta percha , biomedical engineering , composite material , medicine , structural engineering , engineering , radiology
Zuolo ML, Perin FR, Ferreira MOF, Faria FP. Ultrasonic root‐end preparation with smooth and diamond‐coated tips. Endod Dent Traumatol 1999; 15: 265–268. © Munksgaard, 1999. Abstract — The purpose of this study was to compare the effects of smooth and diamond‐coated ultrasonic retrotips on the external and internal surfaces of root‐end preparations with the aid of a scanning electron microscope (SEM). Forty‐four mesial roots of human mandibular molars were selected. The canals were cleaned, shaped and obturated using gutta‐percha and sealer. The apical portions were resected at a 45°‐angle bevel exposing both mesial canals and the isthmus area. The roots were then divided into two groups according to the type of root‐end preparation: Group A —performed with smooth retrotips (S) and Group B — performed with diamond‐coated retrotips (DC). The specimens were coded and prepared for SEM evaluation. Observations of the external surface preparation showed that the S and DC retrotips produced very well‐centered cavities involving both canals and isthmus area with minimal deviations and no perforative defects. When the internal surface of the root‐end preparations was evaluated, it was evident that the use of S retrotips resulted in clean canal walls with little superficial debris and smear layer. Internal canal surfaces done with DC retrotips were irregular showing patent grooves, in contrast with the more uniform, regular and smoother surfaces when S retrotips were employed.