Document Type


Date of Degree

Spring 2018

Access Restrictions

Access restricted until 07/03/2020

Degree Name

MS (Master of Science)

Degree In


First Advisor

Allareddy, Veerasathpurush

First Committee Member

Shin, Kyungsup

Second Committee Member

Allareddy, Veeratrishul


Background: Class II malocclusion is among the most common treated cases in orthodontics, yet there has not been a uniform consensus on the most effective and stable non-surgical treatment approach for class II division 1 malocclusion.

Purpose: The purpose of this study is to assess effectiveness, long term stability, and quality of life following non-surgical orthodontic treatment in patients with Class II Division I malocclusion and severe overjet.

Study Design: This study consists of a retrospective arm, analyzing the treatment approaches and effectiveness of class II division 1 with severe overjet, as well as a prospective arm assessing long-term stability and quality of life. Initial and final results for 30 patients treated non-surgically were analyzed by photos and lateral cephalometric radiographs. A post retention clinical exam was done for final measurements, assessment for practitioner and patient satisfaction, and patient quality of life questionnaires.

Results: Non-surgical treatments for severe class II division 1 patients have shown to be statistically significant in effectively reducing overjet and overbite (P < 0.01) as well as improving the SNB and ANB angles (P<0.01) and angulation of maxillary incisors to SN plane (P < 0.05). Patient satisfaction was averaged at 4.1-4.3 (on a 5-point scale) for treatment, esthetics, and occlusion indicating good results and long-term stability. Quality of life assessments were also high based on the OHIP and CPQ.

Conclusion: Non-surgical treatment to correct class II can significantly reduce overjet and overbite, SNB and ANB angles, as well as the angulation of maxillary incisors to SN plane. These treatment approaches have shown to be reliable in retention and stability of occlusion, as well as high results of patient satisfaction.


viii, 34 pages


Includes bibliographical references (pages 33-34).


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