Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Gonial angle distortion in lateral head films: a methodologic study.

O Slagsvold, K Pedersen

    American Journal of Orthodontics
    |May 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    A longitudinal study of the dynamics of Mycoplasma bovis antibody status in primiparous cows and bulk tank milk in Swedish dairy herds.

    Journal of dairy science·2024
    Same author

    Deletion of NADPH oxidase 2 in chondrocytes exacerbates ethanol-mediated growth plate disruption in mice without major effects on bone architecture or gene expression.

    Alcohol, clinical & experimental research·2023
    Same author

    Penicillin cross-sensitivity in patients with confirmed peri-operative allergic hypersensitivity reactions to cefazolin: a retrospective observational study.

    Anaesthesia·2023
    Same author

    Retrospective observational study of the incidence of peri-operative allergic hypersensitivity reactions to cefazolin.

    Anaesthesia·2023
    Same author

    Herd-level prevalence of Mycoplasma bovis in Swedish dairy herds determined by antibody ELISA and PCR on bulk tank milk and herd characteristics associated with seropositivity.

    Journal of dairy science·2022
    Same author

    Providing more balanced information on the harms and benefits of cervical cancer screening: A randomized survey among US and Norwegian women.

    Preventive medicine reports·2021
    Same journal

    Recent advances in bacterial chemotherapy; the sulfonamides.

    American journal of orthodontics·2010
    Same journal

    Factors modifying head form in man.

    American journal of orthodontics·2010
    Same journal

    The advisability of extraction as a therapeutic aid in orthodontics; affirmative.

    American journal of orthodontics·2010
    Same journal

    Lesions of the mandible; secondary carcinoma of the mandible.

    American journal of orthodontics·2010
    Same journal

    Salivary gland tumors.

    American journal of orthodontics·2010
    Same journal

    Extensive ameloblastoma.

    American journal of orthodontics·2010
    See all related articles

    Lateral head films show significant distortion in gonial angle measurements due to magnification errors. This roentgenographic method error varies individually and is linked to mandibular shape, making precise gonial angle assessment unreliable.

    Area of Science:

    • Anthropology
    • Radiology
    • Forensic Science

    Background:

    • The gonial angle is a key anatomical landmark in the mandible.
    • Accurate measurement of the gonial angle is crucial in various fields, including orthodontics and forensic anthropology.
    • Lateral roentgenographic head films are commonly used for cephalometric analysis.

    Purpose of the Study:

    • To investigate the accuracy of gonial angle measurements obtained from lateral roentgenographic head films.
    • To compare craniometric and roentgenocephalometric measurements of the gonial angle.
    • To identify sources of error and variations in gonial angle distortion.

    Main Methods:

    • Skull material was used for the study.
    • Gonial angles were measured using both craniometry (direct measurement) and roentgenocephalometry (radiographic measurement).

    Related Experiment Videos

  • Comparisons were made between the two measurement methods to assess discrepancies.

    • Main Results:

    • Statistically significant differences were found between craniometric and roentgenocephalometric gonial angle measurements.
    • A systematic method error in roentgenocephalometry, specifically magnification of the gonial angle, was identified as the primary cause of distortion.
    • Magnification was greater on the side closer to the film and showed significant individual variation, ranging from 1.17 to 17.54 degrees.

    Conclusions:

    • Lateral head films are generally unreliable for precise gonial angle registration due to inherent magnification errors.
    • The degree of distortion is closely associated with individual mandibular morphology, particularly the divergence of the corpus and inclination of the rami.
    • Currently, no method exists to accurately assess gonial angle distortion in individual living subjects from head films.