 ##  [Maximum Mouth Opening](/maximum-mouth-opening) 

  ##  [Maximum Mouth Opening](https://health.quantumdictionary.io/maximum-mouth-opening-0) 

  
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**Health &amp; Life Sciences Dictionary**

 
Definition

The greatest voluntary vertical separation between maxillary and mandibular reference points (commonly the incisal edges or specified dental/alveolar landmarks) achieved by a conscious, unassisted mouth opening and recorded along the midline; typically expressed in millimetres.