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Delgado-Molina, E., Tamarit-Borras, M., Berini-Aytes, L. and Gay-Escoda, C. (2009) Comparative Study of Two Needle Models in Terms of Deflection during Inferior Alveolar Nerve Block. Medicina Oral Patologia Oral y Cirugia Bucal, 14, e440-e444.

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• TITLE: Bevel Tip Deformation in New and Used Dental Needles

  AUTHORS: César Gaitán- Fonseca, Denise Romo- Castillo, Bernardino Cerda- Cristerna, David Masuoka, Amaury Pozos- Guillén

  KEYWORDS: Bevel Tip, Deformation, Dentistry, Needles

  JOURNAL NAME: Microscopy Research, Vol.3 No.1, January 14, 2015

  ABSTRACT: Objectives: To evaluate quantitatively deformation of the angle of the horizontal plane of the bevel tip in new dental needles and in dental needles used in clinical procedures. Material and Methods: A cross-sectional study was performed with 360 dental needles from four different manufacturers. The needles were divided into four groups (90 per group): Group 1, Monoject; Group 2, DLP; Group 3, Badiject, and Group 4, Zeyco. The new and used needles were evaluated by scanning electron microscopy to evaluate quantitatively the deformation on the bevel. Results: All groups showed a significantly statistical difference between new needles and needles used for one or two injections (P