Postoperative Pain in Endodontically Treated Teeth: A Cross-sectional Study of Retrospective Data.

Aim: This study aimed to assess the occurrence of postoperative pain and associated factors in patients treated endodontically at a Postgraduate Center in Endodontics in Southern Brazil.

Materials And Methods: The evaluation was performed using the medical records of 658 patients. Pulp conditions, postoperative pain, pain intensity, edema, number of sessions (single or multiple), and medication administration in the postoperative period were analyzed.

Reference values for pulp oxygen saturation as a diagnostic tool in endodontics: a systematic review and meta-analysis.

Objectives: This systematic review aimed to identify mean oxygen saturation values (SpO) using pulse oximetry in permanent maxillary anterior teeth.

Materials And Methods: The MEDLINE, Scientific Electronic Library Online, Cochrane Central Register of Controlled Trials, EMBASE, and Literatura Latino Americana em Ciências da Saúde electronic databases were searched. Combinations and variations of "oximetry" AND "dental pulp test" were used as search terms.

Assessment of Apical Extrusion using Rotary and Reciprocating Systems during Root Canal Retreatment.

Aim: The objective of this study was to assess apical extrusion after filling material removal using two systems, one rotary and one reciprocating.

Materials And Methods: A total of 34 extracted mandibular premolars with single roots were selected and, posteriorly, prepared and filled. Following material aging for 60 days, teeth were divided into two groups, according to the method used to remove root filling material: group I, ProTaper® Universal Retreatment instruments plus refining with the Hero 642® sequence and group II, WaveOne® instruments.

Effect of At-Home Bleaching on Oxygen Saturation Levels in the Dental Pulp of Maxillary Central Incisors.

The present study assessed oxygen saturation (SaO2) levels before, during, and after at-home bleaching treatment in the pulps of healthy maxillary central incisors. SaO2 levels were measured in 136 healthy maxillary central incisors using a pulse oximeter. The bleaching protocol consisted of 10% carbamide peroxide gel placed in individual trays and used for four hours daily for 14 days.

Mesiolingual Canal Prevalence in Maxillary First Molars assessed through Different Methods.

Aim: Evaluate the prevalence of mesiolingual canal prevalence orifice in mesiobuccal roots of maxillary first molars using five methods of visualization.

Materials And Methods: About 73 first permanent maxillary molars were analyzed. Visual clinical analysis of the presence of the fourth canal was performed using a straight end-odontic exploratory probe (EXDG16®) and a K10 manual file (SybronEndo®).

Regaining Apical Patency with Manual and Reciprocating Instrumentation during Retreatment.

Introduction: Different techniques have been proposed to help achieving apical patency during endodontic treatment and retreatment. The objective of this study was to compare reestablishment of apical patency in teeth previously subjected to root canal treatment using manual and reciprocating instruments.

Methods And Materials: A total of 40 single-rooted extracted human mandibular incisors were selected and prepared using the Hero 642 sequence to 45/0.

Presence of Metallic Microfragments on Dentinal Walls and Instrument Defects following Root Canal Preparation.

Aim: To determine the presence of metallic microfragments and their elemental composition in the dentinal walls of root canals following preparation using different endodontic instruments and to assess the active cutting edges of instruments with regard to structural defects.

Materials And Methods: A total of 108 molar teeth were selected and prepared using different endodontic instruments. Teeth were randomly divided into nine groups of 12 teeth each, according to the instruments employed: Manual systems -K-FlexoFile, K-File, and Hedstroem; rotary systems - ProTaper Next, Mtwo, BioRaCe; and reciprocating systems - Reciproc, Unicone, and WaveOne.