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EFFICACY OF TEMPORARY FIXED RETENTION FOLLOWING ...

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3. Go, Gonion (anatomic): The most posterior-inferior point along the gonial<br />

process of the mandible.<br />

4. Is, Incision superius: The incisal tip of the more anterior maxillary central<br />

incisor.<br />

5. Ii, Incision inferius: The incisal tip of the more anterior mandibular central<br />

incisor.<br />

6. Ls, Labrale superius: The most anterior point on the vermilion border of the<br />

upper lip.<br />

7. Li, Labrale inferius: The most anterior point on the vermilion border of the<br />

lower lip.<br />

8. LIA, Apex of mandibular central incisor: The apical end of the same<br />

mandibular central incisor used to locate Ii.<br />

9. L6C, L6 cusp: The mesial cusp tip of the mandibular first molar.<br />

10. Me, Menton: The most inferior point on the symphysis of the mandible.<br />

11. Na, Nasion: The anterior point at the intersection between the nasal and<br />

frontal bones.<br />

12. Or, Orbitale: The most inferior point on the lower margin of the bony orbit.<br />

13. Pg, Pogonion: The most anterior point on the anterior contour of the bony<br />

chin below B Point and above Gnathion.<br />

14. Se, Sella turcica: The center of the hypophyseal fossa, determined by<br />

inspection.<br />

15. U1A: the apical end of the maxillary central incisor.<br />

Computed Measurements<br />

All landmarks are located with the image of the subject’s head oriented<br />

with Frankfort Horizontal parallel to the floor. The following listing provides<br />

definitions of the cephalometric variables used in the study:<br />

56

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