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The effect of angulation and overlap of impacted canines on treatment success


Ladan Eslamian
Professor, Dept. of Orthodontics, Dental School, Shahid Beheshti University of Medical Sciences

Sara Yoosefinia
Postgraduate student, Dept. of Orthodontics, Dental School, Shahid Beheshti University of Medical Sciences

Sahar Saeedi
Dentist, Dental School, Shahid Beheshti University of Medical Sciences


Objective:
Orthodontic treatment success for impacted canines depends on various factors. The present studies aimed to assess the effect of angulation and overlap of upper impacted canine on orthodontic treatment success in orthodontic patients.
Methods & Materials:
This descriptive analytical and retrospective study included 45 patients (34 females, 11 males) with mean age of 13.9 years old .Duration of treatment, the angulation of canine teeth in relation to midline, the amount of coverage of canine crown on lateral root, root resorption of the anterior teeth on the Panoramic view and the gingival recession of the anterior teeth on the photographs were the variables. Treatment was successful when no root resorption or gingival recession observed.  The relation between the variables was calculated by Spearman correlation test and the effect of treatment duration was assessed by Linear Regression test.
Results:
Among the 45 studied cases 25 didnot show any root resorption or gingival recession. Increased amount of canine angulation and increased overlap on the lateral root increased the incidence of lateral root resorption(P<0.002 & P<0.001) significantly. Palatal impaction increased the root resorption significantly in comparison to buccal impaction (P<0.01).Age had effect on central incisor gingival recession and when the age increased, the gingival recession increased too (P<0.04). Age was also effective on treatment duration and when the age increased the treatment duration decreased (P<0.05).
Conclusion:
The amount of angulation and overlap of the impacted canine and the palatal impaction affected the incidence of lateral incisors’ root resorption. Age affected the treatment duration and central incisor gingival recession. More than fifty percent of the cases were successful.

Keywords:
Angulation, Overlap,Treatment success


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محل نشر یا ارائه:  کنگره 10 انجمن ارتودنتیست ها
سال ایرانی :  1391
موضوع:  ارتودنسی
Level:  Postgraduate

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