Alveolar Margin
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
The term 'limbus' in anatomy refers to three structures: the free edge of the alveolar process for tooth roots, the muscular ridge surrounding the fossa ovalis in the right atrium, and the anterior and posterior edges of the upper eyelid.
Encyclopedia entry (1928–1936)
ALVEOLAR MARGIN (Latin), edge, border. This term is used in anatomy to denote: 1) the free edge supplied with cells for the roots of teeth of the alveolar process of the upper and lower jaw (pars, s. processus alveolaris maxillae et mandibulae) - limbus alveolaris; 2) a thickened ridge formed by muscles of the septum between the atria, which in the form of a ring surrounds the oval fossa (fossa ovalis), observed from the side of the right atrium - limbus fossae ovalis, s. isthmus Vieussenii; 3) the clearly expressed anterior edge of the upper eyelid, which is furnished with eyelashes, and the posterior edge, along which open the glan-dulae tarsales, s. Meibomi - limbus palpebra-lis anterior et posterior.
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“Alveolar Margin.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/alveolar-margin/