Medical professionals often note the functional impact of this condition:

: Men generally have a larger opening than women, largely correlated to height.

: Reduced mouth opening is frequently linked to conditions like scleroderma , where it is often associated with esophageal issues, and temporomandibular joint (TMJ) disorders.

If you are looking for a high-quality PDF on (limited mouth opening/trismus), the most recent and comprehensive medical reference is the article by Nicot et al. (2022) published in EMC - Chirurgie orale et maxillo-faciale . Recommended PDF Sources & Reviews