Abstract
Aims: This study was aimed to compare the effects of two different techniques on the position of maxillary incisors during the intrusive movement. Materials and Methods: The sample consisted of two groups, the utility intrusion arch and continuous intrusion arch groups. Upper typodont arch of class II division I was used and the arches were activated to deliver 60 gram of force. Pre and postoperative digital images were taken and analyzed using Autodesk AutoCAD software™. For each group six parameters were measured and compared. A significance value of 0.05 was predetermined. Results: Significant difference was found in vertical change of estimated midpoint of root position, axial inclination, anteroposterior position of incisal edge, relative contribution of torque and protrusion to the change in inclination and insignificant difference in vertical change of incisal edge position. Conclusions: Maxillary incisors intrusion with a minimal protrusion could be achieved with the continuous intrusion arch technique
Highlights
Deep overbite is one of the most common malocclusion seen in children as well as adults that can occur along with other associated malocclusions.[1]
The purpose of this study is to examine and compare dental positional changes obtained by utility intrusion arch (UIA) and continuous intrusion arch (CoIA)
The maxillary incisors were intruded, protruded and tipped labially with both arch wires. These findings are in accordance with many authors.[22-24]. The maxillary incisors were relatively intruded by 1.43±0.25 mm with (CoIA) and 1.39±0.38 mm with (UIA).Various studies have reported intrusion rates from 1 to 3mm with different intrusion mechanics.[22, 25, 26]
Summary
Deep overbite is one of the most common malocclusion seen in children as well as adults that can occur along with other associated malocclusions.[1]. Treatment techniques include labial tipping of anterior teeth, extrusion of posterior teeth, intrusion of anterior teeth, distal tipping of posterior teeth and surgical approaches.[4,5,28]. The decision must be based on the patient’s age, etiology of the anomaly, skeletal and dental morphology, surrounding muscular and periodontal tissues, existence of the deep bite in the rest position, length of lips, occlusal plane, ideal incisor position and the lower facial height.[6- 8]. The intrusion of anterior teeth may be very useful in correcting a deep overbite. In patients with excessive maxillary incisor display, intrusion of the maxillary anterior teeth will improve esthetics and help in the correction of the deep overbite. [21] Other advantages of intrusive mechanics include good control of the vertical dimension.[9]. Several mechanics have been described for incisor intrusion J-Hook headgears, functional appliances, anterior bite-planes, Begg mechanics, Edgewise mechanics, three piece www.rafidaindentj.net
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
