Introduction: Bolton ratio is considered as seventh key of normal occlusion. Many orthodontic patients have to undergo premolar extractions as a part of treatment. Aims and objectives: The present study was taken up to investigate the effect of premolar extractions on Bolton’s overall ratios in a sample of north Indian population. Materials and methods: Mesiodistal tooth widths were measured on...

A 16-year-old woman with congenitally missing permanent mandibular second premolars and central incisors presented for treatment. The prosthodontic treatment consisted of placing 2 internal tri-lobed narrow platform implants in the mandibular second premolar spaces, along with zirconium abutments and all-ceramic crowns. A 4-unit zirconium fixed partial denture was fabricated to restore the miss...

Background and Aim: The aim of the present study was to determine the incidence of transmigrated maxillary and mandibular canine teeth and also of the other impacted teeth, apart from third molars, in a Turkish dental patients subpopulation. Materials and Methods: This was a retrospective study of 2900 panoramic radiographs (PRs) taken from patients who were referred to the Faculty of Dentistry...

The aim of this study was to examine the applicability of simple equations proposed by Melgaco to predict the mesiodistal widths of the unerupted mandibular permanent canines and premolars in patients visiting Islamic International Dental hospital, Islamabad. This study was conducted during 2007-2008 at orthodontic department of Islamic International Dental Hospital, Islamabad. The sample consi...

The aim of the present study was to examine the morphology of root canals in premolar teeth with completely formed root apices. The material consisted of 139 extracted premolar teeth, including 83 first premolars (59.7%) and 56 second premolars (40.3%). Maxillary teeth made up 64% of the material and mandibular teeth 36%. In order to measure the actual root canal length an endodontic instrument...

BACKGROUND An impacted tooth is one which fails to reach the occlusal plane even after two-third's of its root completion. Though the etiology is multi-factorial, most common reason is crowding of teeth with lack of space for eruption. Mandibular third molars are the most commonly impacted teeth. Very few studies have been done to assess the prevalence of impacted premolar teeth. MATERIALS AN...

intraosseous migration is an unusual developmental dental anomaly, which demonstrates horizontal movement of unerupted teeth only affecting the permanent dentition of the lower jaw. mandibular second premolar is the most common impacted tooth after the third molars and maxillary canines. distal migration of the second premolar is rare and early loss of the permanent first molar is one of the mo...