Patterns of Dental
Patterns of Dental Arch Form in the Different Classes of Malocclusion
Zuhair A. Murshid
Division of Orthodontics, Department of Preventive Dental Science, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia. firstname.lastname@example.org
Abstract: Objective: The aim of this study was to identify the pattern of arch form among patients with Angles Class I, II and III malocclusions. Materials and Methods: Sample consisted of 299 records of orthodontic patients who attended the clinic at the Faculty of Dentistry, King Aabdulaziz University. The mean age was 16.3 (±0.83) years. Patients were assigned into three groups according to their Classification; Class I, Class II and Class III. The lower arch form was assessed and categorized as ovoid, tapered, and square. Results: There was a significant difference in the pattern of lower arch form among the three groups (P >05); ovoid arch form being the most prevalent among Class I and Class II cases and square was the most prevalent among Class III cases for both genders. There was a significant trend in proportion among Class I cases where the percentage of ovoid shape was higher in males while taper arch shape was higher among females. Conclusions: The ovoid type of preformed arch wire with different sizes is recommended in orthodontic treatment for most of Class I, II malocclusions, and the square type is recommended in the treatment of most of Class III malocclusion. With the availability of different preformed shapes and sizes of arch wires, this study highlight the importance of selection of patients’ clinical arch form and customization of arch wire is usually necessary.
[Zuhair A. Murshid. Patterns of Dental Arch Form in the Different Classes of Malocclusion. J Am Sci2012;8(10):308-312]. (ISSN: 1545-1003). http://www.jofamericanscience.org. 45
Key words: Angle classification, occlusal relationship, types of arch form. Full Text 45