Objective: The purpose of this retrospective study was to comparatively assess the severity of apical root resorption in patients treated with second premolar extraction and non-extraction treatment protocols. A further aim was to evaluate the effect of treatment duration on the degree of apical root resorption.Methods: The sample consisted of 596 teeth in 50 patients （41 females, 9 males） aged 12-22 years, with different malocclusions. The non-extraction group included 20 patients, with an init... 

【文章來源】：重慶醫(yī)科大學(xué)重慶市

【文章頁數(shù)】：73 頁

【學(xué)位級別】：碩士

【文章目錄】：
LIST OF ABBREVIATIONS
ABSTRACT
Introduction
1. Materials and Methods
2. Results
3. Discussion
4. Limitations
5. Conclusion
Reference
REVIEW 1
    Reference
REVIEW 2
    Reference
Acknowledgments
Published articles during residency



本文編號：3109272