Crowding is one of the causes of class I malocclusion. The purpose of the present study was to examine the relationship between arch length, arch width and arch perimeter in crowded and non-crowded arches, as well as to made comparison of the right and left sides between them and to find out the contributing factor in lower arch crowding. The study groups consisted of 60 subjects aged 16 to 21 ...

STATEMENT OF THE PROBLEM The stability of orthodontic treatment depends on preserving the patient's pretreatment arch form and arch size during and after treatment. PURPOSE This investigation was aimed to study the size and shape of Iranian mandibular dental arch and evaluate the correlation of their average dental arch with commercially available preformed rectangular nickel-titanium arch wi...

OBJECTIVE To compare dental arch dimensions and arch forms in various vertical facial patterns. STUDY DESIGN Cross-sectional comparative study. PLACE AND DURATION OF STUDY The Aga Khan University Hospital, Karachi, from June 2007 to May 2008. METHODOLOGY Cases of age ranging 13-30 years were reviewed having full complement of teeth (upto second permanent molars) with less than 7 mm crowdi...

The stability of rapid maxillary expansion (RME) was studied in 20 patients. Study models were evaluated immediately prior to treatment, at the end of treatment, and at least 4 years post-treatment with regards to maxillary and mandibular intermolar widths, intercanine widths, arch perimeters, and irregularity indices. The mean maxillary intermolar width increased by 3.7 mm during treatment, an...

Open mouth posture and maxillary arch width were assessed annually for 4 years in a group of children. While younger children exhibited high levels of open mouth posture, this behavior decreased significantly over time. Racial and sex differences, as well as a race-by-time interaction were also evident. The children displayed a significant increase in maxillary arch width across time with sex a...

Background: Pont's Index was established to predict maxillary dental arch width from the sum of the mesiodistal diameters of the four maxillary incisors (interincisal width) of the French population. However, the use of Pont's Index in predicting ideal arch shape in orthodontics has been controversial due to racial differences. Pont suggested that the reliability of this Index be tested in othe...

Intra-oral appliances such as transpalatal arch and Nance appliance fail to resist against forces that tend to loosen the anchorage. The infirmity arises due to the long lever arm and the mesial force that is perpendicular to the long axis of the appliance. The butterfly arch is presented here as an intra-oral appliance that withstands the mesially directed forces with a mechanism that puts str...

INTRODUCTION The purpose of this study was to evaluate the alveolar bone dimensions and arch perimeter discrepancy in unilateral palatally impacted canines. METHODS This retrospective split-mouth study reviewed 207 cone-beam computed tomography (CBCT) scans of patients with unilateral or bilateral impacted canines referred for orthodontic treatment. Out of 207 CBCT scans, only 39 scans in whi...

Knowledge of the plantar foot shape alteration under weight bearing can offer implications for the design and construction of a comfortable and functional foot support. The purpose of this study was to quantify the change in three-dimensional foot shape under different weight-bearing conditions. The plantar foot shapes of 16 normal feet were collected by an impression casting method under three...