Comparison of arch forms between Turkish and North American

Abstract

Objective: The aim of this study was to clarify the morphological differences in the mandibular arches of Turkish and North American white subjects. Methods: The sample included 132 Turkish (34 Class I, 58 Class II, and 40 Class III) and 160 North American (60 Class I, 50 Class II, and 50 Class III) subjects. The most facial portion of 13 proximal contact areas was digitized from photocopied images of patients' mandibular dental arches. Clinical bracket points were calculated for each tooth based on mandibular tooth thickness data. Four linear and two proportional measurements were taken. The subjects were grouped according to arch form types (tapered, ovoid and square) in order to have frequency distribution compared between ethnic groups in each Angle classification. Results: The Turkish group showed significantly lower molar depth and more significant molar width-depth (W/D) ratio in all three Angle classifications. On the other hand, the Turkish group also showed a significantly larger intercanine width in Class III malocclusion and intermolar width in Class II malocclusion. The most frequent arch forms seen were the ovoid arch form in the Turkish group and the tapered form in the white group. Conclusions: Our results demonstrate that when treating Turkish patients, one should expect to use preformed ovoid arch form orthodontic wires in a significant percentage of patients.

Can 3D imaging and digital software increase the ability to predict dental arch form after orthodontic treatment?

“…16 Also, racial differences that cause variations in dimensions and form of dental arch compared with the available archwires further highlight the significance of proper selection of a preformed archwire that best fits the dental arch. 7,17,18 Diagnostic software programs can provide accurate information and aid in determining more complex patterns of arch form. In addition, advances in computer analyses enable better definition of arch form individually for each patient.…”

Maxillary and mandibular dental arch forms in a Jordanian population with normal occlusion

“…Several factors have been claimed to affect arch size and form such as ethnic background, type of malocclusion, variability in eruptive paths of the teeth, growth of the supporting bones, and the movement of the teeth after emergence due to habits and unbalanced muscular pressures [11][12][13] Dental arch form has been evaluated for different populations [14][15][16][17]. However, no studies have been conducted in Jordan.…”

Comparision of Commrcially Available Archwires With Normal Dental Arch in a Group of Saudi Population

“…The dental arch is an essential element in orthodontic planning and treatment; therefore, the correct identification of dental arch form and size is necessary to achieve a stable, functional and esthetic results; otherwise, the probability of relapse will increase (1,2) .…”