In a genioplasty advancement, where is there normally no tension?

• A. Mylohyoid muscle
• B. Hyoglossus
• C. Genioglossus muscle
• D. Digastric muscle

Answer: (B)

In a genioplasty advancement, the hyoglossus muscle is typically positioned in a way that it experiences minimal tension. The mylohyoid, genioglossus, and digastric muscles are more directly involved in the dynamics of the mandible and the lower facial structure, often experiencing tension due to their functional roles, such as facilitating tongue movement and supporting the floor of the mouth.

When performing a genioplasty, which involves repositioning the bony structure of the chin for aesthetic or functional purposes, the hyoglossus muscle remains relatively unaffected by the advancements made. It primarily assists in tongue movements and does not exert significant tension in response to the alterations made in the chin position. Therefore, it's this anatomical relationship that establishes the hyoglossus muscle as the structure where there is normally no tension following a genioplasty advancement.