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

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.This study was bankrolled through a grant from the Deanship of Scientific Research/ Jordan University of Science and Technology (Grant No. 20090030). The Deanship of Scientific Research had absolutely no role in the design, collection, analysis, and interpretation of data and writing of the manuscript of this study

Correction to: Maxillary and mandibular dental arch forms in a Jordanian population with normal occlusion (BMC Oral Health, (2021), 21, 1, (105), 10.1186/s12903-021-01461-y)

After publication of the original article [1], the authors identified an error in Dr. E. S. Abu Alhaija's affiliations list. The incorrect affiliations list is: 1Division of Orthodontics, Department of Preventive Dentistry, Faculty of Dentistry, Jordan University of Science and Technology, P.O. Box 3030, Irbid 22110, Jordan; 3College of Dental Medicine, Qatar University, P.O. Box 2713, Doha, Qatar. The correct affiliation is: 3College of Dental Medicine, Qatar University, P.O.Box 2713, Doha, Qatar. The original article has been corrected.Scopu