oral fissure

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or·al fis·sure

[TA]
the horizontal opening between the lips leading into the oral vestibule; the aperture of the mouth.
Synonym(s): rima oris [TA], oral opening
Farlex Partner Medical Dictionary © Farlex 2012

or·al fis·sure

(ōrăl fishŭr) [TA]
Horizontal opening between the lips leading into oral vestibule; aperture of mouth.
Synonym(s): oral opening.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
The pore adjacent to the oral opening most likely provides a means for the larvae to release chemicals from glandular cells located adjacent to the oral opening; such cells have been previously identified in spirurid nematodes (Quentin and Poinar 1973).
[94] Stephen Cox & Hans Zoellner conducted a clinical trial of physiotherapeutic treatment to improve oral opening in oral submucous fibrosis in the Nepali population and suggested that physiotherapy is effective for increasing the oral opening and can be readily used to improve OSF in communities with otherwise limited health resources.
Limitations of oral opening and occasionally paresthesia after local anesthetic injections for dental treatment continue to be problems in dentistry.
She is remitted to Plastic Surgery Service, where an excision of scar contracture with W-plasty and bilateral commisuroplasty were made, improving oral opening from 2.5 to 4.8 cm and providing a better social environment and life quality.
The patient must have an adequate oral opening ([greater than or equal to] 2 cm interincisor distance) if transoral instrumentation is to be used.