Correlation Between Lower Third Molar Impaction Types and Mandibular Angle and Condylar Fractures: A Retrospective Study.

Purpose: The purpose of this study was to investigate and determine the relations between mandibular third molar (M3) impaction types and mandibular angle and condylar fractures.

Materials And Methods: A retrospective study was conducted in patients with mandibular angle and condylar fractures referred to the Oral and Maxillofacial Surgery Department of the Shahid Kamyab Hospital (Mashhad, Iran) from 2013 to 2018. Data sources were patients' hospital documents and panoramic radiographs.

Bond Strength of Resin Cement and Glass Ionomer to Nd:YAG Laser-Treated Zirconia Ceramics.

Purpose: To investigate the effect of neodymium-doped yttrium aluminum garnet (Nd:YAG) laser irradiation on the surface properties and bond strength of zirconia ceramics.

Materials And Methods: Forty-eight zirconia ceramic pieces (4 × 4 × 1 mm ) were divided into four groups according to surface treatment as follows: two control groups (no treatment) for resin bonding (CRC) and glass ionomer (GI) bonding (CGC); two laser treatment groups (Nd:YAG irradiation, 3 W, 200 MJ, 10 Hz, 180 μs) for resin bonding (LRC) and GI bonding (LGC). The ceramics in the control groups and the laser groups were distinguished by the application of different cements (resin cement and GI).