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

Abstract

Background Ethnic background has been claimed to affect arch form. The purpose of this study was to describe and elucidate the maxillary and mandibular arch forms in Jordanian population and to develop a classification method for these forms which could be employed to construct orthodontic archwires accordingly. Methods The sample was comprised of study casts of five hundred and twenty subjects (231 males and 289 females with a mean age of 15.4 ± 1.02 years). All subjects had permanent dentition with normal occlusion. A mathematical method associated with a polynomial function of 6th degree was employed to assess the dental arch forms. The resultant arch forms were classified into 5 groups for both the maxilla and mandible utilizing a computer software with special code designed for this study. Each group was subdivided into 3 subgroup sizes namely: small, medium, and large. Results Catenary arch form was found in 47% and 41.2% (p ˂ 0.01) of maxilla and mandible arch forms, respectively. Form 2 (which is halfway between ellipse and U-shaped arch form) was found in 27.7% and 26.7%. Medium size arch form was found in 55.4% of the maxillary and 65.6% of the mandibular arch forms. Conclusion Catenary arch form was the most prevalent arch form, followed by wide elliptical form. The other forms, which included tudor arch, tapered equilateral and quadrangular forms were less frequent. Regarding size, the medium size was the most prevalent among the studied samples.

CBCT Evaluation of Quality and Quantity of Bones for Immediate Implant Treatment Planning in Central Incisor Area in relation to Arch Form

“…The ovoid arch form was the dominant arch form in the current study which is in agreement with Saeed and Mageet [ 38 ] in the Sudanese population. In the same direction, Aljayousi et al found similar results in the Jordanian population, but their second dominant arch form was the tapered (36.2%), followed by the square arch form (16.8%) [ 39 ].…”

“…However, considering using a different procedure for arch form evaluation that takes in the account evaluation of the position of all teeth might be more sensitive to give the exact dental arch form, whether by using a spherical system. whether by using a spherical (polar) coordinate system[ 41 ] or by utilizing computer software to obtain the “polynomial function” that best describes the curve corresponding to the dental arch form [ 39 ] could give us more detailed information regarding the expected bone thickness for each arch form. Further study that addresses these limitations is required to clarify these points and to distinguish and confirm these results.…”

Dental arch form and arch dimensions among a group of Egyptian children and adolescents

“…Regarding the arch form, it was found that anterior arch length together with intercanine width (ICW) play an important role in determining the arch form, as these measurements shape the anterior part of the arch, thus affect the form of the arch (Bayome et al 2011;Aljayousi et al 2021).…”