statement of problem: knowledge of internal anatomy of tooth plays an important role in a successful endodontics treatment. for a proper endodontic treatment, it is not only important to know the form of normal anatomy of tooth’s interior but one must also be acquainted with the possible diverse forms. purpose: a thorough understanding of the internal anatomy of human mandibular incisors (centr...

Introduction: Some clinicians use a handheld screw driver instead of a torque wrench to definitively tighten abutment screws. The aim of this study was to compare the removal torque of one-piece and two-piece abutments tightened with a handheld driver and a torque control ratchet. Methods: 40 ITI implants were placed in acrylic blocks and divided into 4 groups. In groups one and two, 10 ITI one...

In Permanent-Magnet Synchronous Generators (PMSGs) the reduction of cogging torque is one of the most important problems in their performance and evaluation. In this paper, at first, a direct-drive vertical-axis wind turbine is chosen. According to its nominal value operational point, necessary parameters for the generator is extracted. Due to an analytical method, four generators with differen...

INTRODUCTION Although there are numerous studies in the literature on alignment stability in the lower arch, there are few referring to the upper arch. AIMS To assess upper arch stability (irregularity index, widths and length of arch, overjet and overbite) in orthodontically treated patients by comparing late incisor stability with the initial malocclusion and type pf treatment undertaken. ...

This teenage patient presents with pronounced esthetic and functional dental concerns. An anterior frontal view of the patient’s dentition shows virtually total facial blockage of the maxillary right central incisor creating mesial contact of the right lateral incisor with the left central incisor immediately lingual to the blocked out right central incisor. A similar severe misalignment takes ...

The relationship between irregularity of teeth and periodontal disease was investigated in 201 children aged 11-14 years. The upper and lower incisor teeth were assessed for spacing, labio-lingual displacement, and mesiodistal overlap at each of the six contact areas. Plaque and gingivitis were assessed at six sites on each of the four upper and four lower incisor teeth. There was evidence for ...

AIM To assess if mandibular incisor proclination and protrusion during treatment with the Herbst/multibracket appliance can be prevented through simple screws (MIs) anchorage. MATERIAL AND METHODS After a statistical power analysis, 12 Herbst patients with MIs (100% MIs survival) ligated to the Herbst/multibracket appliance to reinforce anchorage were investigated. A control group matched for...

Purpose The objective of this systematic review was to compare the antero-posterior, vertical and angular changes of maxillary incisors with conventional anchorage control techniques and mini-implant based space closure methods. Materials and Methods The electronic databases Pubmed, Scopus, ISI Web of knowledge, Cochrane Library and Open Grey were searched for potentially eligible studies usi...