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...

Supernumerary roots consist of a developmental disturbance which can occur to any teeth, and knowledge about its occurrence is particularly important for the conduction of surgical or endodontic treatment of the affected tooth. In view of this reality, an attempt was made to determine the prevalence of supernumerary roots in lower premolars. The study was carried out with 200 periapical radiogr...

BACKGROUND AND AIMS It is critical to have a proper knowledge of the normal anatomy of the pulp and its variations for the success of endodontic treatment. The aim of this study was to determine the canal configuration and the prevalence of C-shaped canals in mandibular first and second premolars in a North-Western Iranian population. MATERIALS AND METHODS A total of 163 extracted mandibular ...

OBJECTIVE The aim of the present study is to assess the root and root canal morphology of maxillary and mandibular premolars in a Turkish population by using cone beam computed tomography (CBCT). MATERIALS AND METHODS In this study, CBCT images of 2134 premolars (987 maxillary, 1147 mandibular) were obtained from 404 patients. Details of gender, age, number of roots and canals, and canal conf...