This paper continues the series of articles initiated in 2006 that analyse hominin dental crown morphology by means of geometric morphometric techniques. The detailed study of both upper premolar occlusal morphologies in a comprehensive sample of hominin fossils, including those coming from the Gran Dolina-TD6 and Sima de los Huesos sites from Atapuerca, Spain, complement previous works on lowe...

Introduction: A thorough understanding of root canal anatomy and morphology is required for achieving high levels of success in endodontic treatment. The possible anatomic configurations of premolars are well documented in the literature, except for the small incidence of bilateral multi-rooted maxillary and mandibular premolars with three canals. Objective: To report a rare case of bilateral m...

The current study deals with the anterior premolar pattern in the cave and brown bear lineage, and its signifi cance in species determination. The occurrence of single premolars and its combinations in skulls and mandibles is recorded for various chronological and regional groups. Both lineages stay more “conservative” in the upper than in the lower dentition, but show contrasting reduction ten...

Inflammatory dentigerous cysts are usually associated with a carious or non-vital primary tooth. Consequently they are found in children with a mixed dentition. This report describes two cases of inflammatory dentigerous cysts associated with the lower second premolars. Both cases were treated by marsupialisation of the cysts that eventually led to the spontaneous eruption of the premolars.

OBJECTIVES To test the applicability of the Tanaka and Johnston prediction method in a Saudi population. METHODS The current study was conducted at the College of Dentistry, King Saud University, Riyadh, Saudi Arabia from September 2013 to January 2014, on a sample of 409 pairs of orthodontic study models. The mesiodistal width of the mandibular permanent incisors, permanent canines, and perm...

Supernumerary premolars appear to be more common than previously estimated. The purpose of this report was to review most of the cases published in the dental literature since 1932. The authors found that supernumerary premolars occur 3 times more in males than in females, indicating a possible sex-linked inheritance, with the highest frequency of occurrence in the mandibular premolar region (7...

BACKGROUND Polyfiber posts used inside the root canal can help to restore the fracture resistance of weakened premolars. AIM To assess the fracture resistance of endodontically treated premolars restored with different techniques, including the new polyfiber post (Spirapost). MATERIALS AND METHODS One hundred superior premolars were distributed into 10 groups (n = 10): Sound teeth (G1-posit...

OBJECTIVE The purposes of this study were to determine the accuracy of crown and root length measurements of premolars using cone-beam computed tomography (CBCT) and to generate reference CBCT-based data on incisor, canine, and premolar lengths in patients with malocclusions. METHODS Imaging was performed using a CBCT scanner with a 0.292-mm voxel size and 12-bit grayscale. The CBCT-based len...

Aim: Modern endodontics has advanced radically in the recent years, and recently, it been focused on concept of mini-invasive treatments. This study aimed to evaluate sections root apices at 1 mm from radiographic apex using a high-resolution CBCT. Materials Methods: The current was performed three different dental centers. One hundred maxillary permanent premolars (50 first 50 s premolars) wer...