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This retrospective study was carried out on pre and posttreatment digital standardized panoramic radiographs of 30 cases previously orthodontically treated with four first premolar extraction.
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| Measure | Description | Time Frame |
|---|---|---|
| Assessment of mandibular third molar positional variation | measure angles:• LA-ISL: The inward angle (towards the 2nd molar) between long axis of mandibular third molar and the inter-sigmoid line (line connecting the deepest point of the right and left sigmoid notch of the mandible). • LA-IMB: The inward angle between long axis of mandibular third molar and the inferior border of the mandible. | 2 years |
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Inclusion Criteria:
- class I malocclusion cases (0 < ANB < 4) with moderate crowding
Exclusion Criteria:
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Sample size calculation estimated the minimum total required sample size (n) was found to be (27). The sample size was increased to (30) account for sample variability and to improve the robustness of statistical testing
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| Name | Affiliation | Role |
|---|---|---|
| Shereen A Mahlawy, PHD | lecturer of orthodontics, faculty of dentistry, Fayoum university | Principal Investigator |
| clinical cT trial | Clinical trials.gov | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Fayoum University | Al Fayyum | 63514 | Egypt |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 21366476 | Result | Zarin DA, Tse T, Williams RJ, Califf RM, Ide NC. The ClinicalTrials.gov results database--update and key issues. N Engl J Med. 2011 Mar 3;364(9):852-60. doi: 10.1056/NEJMsa1012065. |
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