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Year : 2023  |  Volume : 12  |  Issue : 1  |  Page : 27

SIDS plane: A simple and innovative alternative to Frankfurt horizontal plane

1 Private Practitioner, Hebbal, Bengaluru, Karnataka, India
2 Department of Orthodontics, Srinivas Institute of Dental Sciences, Mangalore, Karnataka, India
3 Consultant Orthodontist, Saligramam, Chennai, Tamil Nadu, India

Correspondence Address:
Suhani Sudhakar Shetty
Private Practitioner, Hebbal, Bengaluru, Karnataka
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jos.jos_84_22

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AIMS AND OBJECTIVES: To derive a new horizontal plane which can be a suitable alternative to Frankfurt horizontal plane (FH plane). MATERIALS AND METHODS: 200 pre-treatment lateral roentogenic cephalograms from patient records in the department of orthodontics and dentofacial orthopaedics were traced. The landmarks were identified and marked and the measurements were carried out. Patients with all skeletal relationships were included in the study. The angle formed between the lines connecting anatomic porion, orbitale and machine porion was measured and tabulated. Dimorphism between the genders if any was also evaluated. RESULTS: The mean angulation between the planes from the anatomic porion to orbitale to machine porion (PoA-Or-PoM) in our sample is 3.14 ± 2.17°. PoA to Or to PoM angulation for males is 2.57° and for females is 3.4°. CONCLUSIONS: SIDS plane also called as derived FH plane given here is a reliable and easily reproducible alternative to the FH plane.

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