The orientation of the sella-nasion line to true vertical in natural head posture is found to be correlated with some measures that describe internal craniofacial morphology.
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Methodology for the correction of a CBCT volume from the skull to the natural head position.
MethodsX
December 2024
Faculty of Engineering, Universidad Autónoma de Occidente, Cali, Colombia.
The orientation of the head during the acquisition of cone beam computed tomography (CBCT) is crucial for accurate cephalometric measurements. However, involuntary head movements during the scan can result in misaligned images. This study presents a method to correct the natural head position (NHP) in CBCT skull images after acquisition.
View Article and Find Full Text PDFObjectives: To evaluate a new superimposition method compatible with computer-aided cephalometrics and to compare superimposition error to that of the conventional Sella-Nasion (SN) superimposition method.
Materials And Methods: A total of 283 lateral cephalometric radiographs were collected and cephalometric landmark identification was performed twice by the same examiner at a 3-month interval. The second tracing was superimposed on the first tracing by both the SN superimposition method and the new, proposed method.
Long-Term Effects of Distraction Osteogenesis of the Mandible.
J Oral Maxillofac Surg
July 2018
Walter C. Guralnick Distinguished Professor and Chief, Emeritus, Department of Oral and Maxillofacial Surgery, Massachusetts General Hospital, Harvard School of Dental Medicine, Boston, MA.
Purpose: 1) To assess the fate of the permanent teeth in and adjacent to the regenerate in pediatric patients who underwent mandibular distraction osteogenesis (DO) and 2) to compare the postoperative growth of the distracted mandible with age- and gender-matched controls.
Patients And Methods: This was a retrospective cohort study of children who underwent mandibular DO during the primary or mixed dentition period and before completion of somatic growth (boys aged ≤14 years and girls aged ≤12 years) at Massachusetts General Hospital from 1996 to 2014. From the DO registry, patients were selected who had complete clinical and radiographic records and at least 1 year of follow-up.
Variability of the inclination of anatomic horizontal reference planes of the craniofacial complex in relation to the true horizontal line in orthognathic patients.
Am J Orthod Dentofacial Orthop
December 2014
Consultant orthodontist and honorary senior lecturer, Kingston and St George's Hospitals and St George's Medical School, London, United Kingdom. Electronic address:
Introduction: The purpose of this study was to assess the reliability of the Frankfort horizontal (FH), sella-nasion horizontal, and optic planes in terms of their variabilities in relation to a true horizontal line in orthognathic surgery patients.
Methods: Thirty-six consecutive presurgical orthognathic patients (13 male, 23 female; age range, 16-35 years; 30 white, 6 African Caribbean) had lateral cephalometric radiographs taken in natural head position, with a plumb line orientating the true vertical line, and the true horizontal line perpendicular to the true vertical. The inclinations of the anatomic reference planes were compared with the true horizontal.
Craniofacial reference plane variation and natural head position.
Eur J Orthod
October 2008
School of Dentistry, The University of Adelaide, Australia.
Commonly used craniofacial reference planes such as Frankfort Horizontal (FH) and sella-nasion have shortcomings, including their variable interindividual orientation when related to true horizontal (HOR). Therefore, the aim of this study was to evaluate the potential usefulness of a range of craniofacial reference planes to HOR, including those which have not been investigated previously: the Krogman-Walker (KW) line, the neutral horizontal axis, the foramen magnum line, and the posterior maxillary plane. A sample of 57 (38 female, 19 males) consecutive, pre-treatment orthodontic subjects aged 12-18 years were photographically recorded in a standing mirror-guided natural head position (NHP).
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