objective: the present study assessed the association of size, axial angulation, developmental stage and bud position of the mandibular third molar with the second molar impaction in patients with mandibular second molar impaction. methods: in this descriptive-analytical study (case-control design), dental records of 5,420 patients in the age range of 12-15 years who underwent orthodontic treat...

a case of unusual root morphology is presented to demonstrate anatomic variations in mandibular second molars. the most common configuration of mandibular second molar is to have two roots with three root canals; however mandibular molars may have many different combinations. endodontic therapy was performed in a mandibular second molar with 3 separate roots 2 located mesially and one distally....

This study investigated the change in interproximal force (IPF) in mandibular anterior teeth during retention and the relationship between the irregularity index before orthodontic treatment and the IPF. The effect that an erupting third molar had on IPF was also examined. Forty treated patients (40 with extraction of four bicuspids) were followed for 18 months during the retention phase. The i...

PURPOSE The aim of this study was to explore root shape abnormalities, to investigate the influence of root form abnormalities on periodontal attachment loss, and to gather basic data to assist in the diagnosis and treatment of aggressive periodontitis. METHODS From January 2010 to June 2012, a survey was conducted of all 3,284 periodontitis patients who visited the Department of Periodontolo...

Germectomy (enucleation) of the first bicuspids has shown to be an effective treatment in management dental crowding mixed dentition because it produces intraosseous decongestion mass between permanent canines and second bicuspids. This provides early available space for autonomic eruption without interference from bicuspid canine which erupts into a highly stable position within arch, facilita...

Human mandibular premolars have earned the reputation for having an extremely complex root and root canal morphology. The incidence of multiple roots and canals in mandibular second premolars is lower than those in mandibular first premolars. Mandibular second premolars with three root canals and separate foramina are very rare. In this case report, endodontic management of a three-rooted mandi...

this article describes a clinical case of mandibular second premolar with three separated canals in apical third of the root that are diagnosed and endodontically treated. sound knowledge of root canal anatomy and morphology, tactile examination of canal walls, critical interpretation of radiographs and high magnification examination are essential elements of success in complicated root canal t...

introduction: the aim of this study was to evaluate the root canal morphology of mandibular first and second molars using cone-beam computed tomography (cbct) in northern iranian population and also to indicate the thinnest area around root canals. methods and materials: we evaluated cbct images of 154 first molars and 147 second molars. by evaluating three axial, sagittal and coronal planes of...

The size of teeth is one of the crucial factors affecting occlusion formation. In the occurrence of the crowding of dental strings, the size of teeth has a significant role. The aim of the study was to determine the influence of the size of permanent frontal teeth (bicuspids) on the appearance of the crowding of the frontal segment of dental strings. The study included 140 subjects, aged 15-20 ...

human mandibular premolars have earned the reputation for having an extremely complex root and root canal morphology. the incidence of multiple roots and canals in mandibular second premolars is lower than those in mandibular first premolars. mandibular second premolars with three root canals and separate foramina are very rare. in this case report, endodontic management of a three-rooted mandi...