Detailed Anatomy of the Female Chin and Mental Region

Description

Shown in lateral profile, the female mental region includes the cutaneous contour of the mentum (chin) and the overlying skin and subcutaneous fat that shape the labiomental groove inferior to the lower lip. Deep to this surface lie the mandibular symphysis and mental protuberance, with the mental foramen positioned on the anterolateral body of the mandible, inferior to the second premolar region and lateral to the midline. The mental nerve and vessels emerge here and fan anteriorly and superiorly to supply the chin and lower lip, coursing superficial to the periosteum but deep to the mimetic musculature. Key muscular layers in this area include the mentalis centrally, depressor labii inferioris and depressor anguli oris more laterally, and the platysma crossing superficially into the lower face and neck. Landmarks matter. A lateral view of the chin helps when planning local anesthesia and anterior mandibular procedures because small errors in estimating the mental foramen position can leave the mental nerve unblocked or, worse, injured. Mental nerve neuropraxia is a known risk after periapical surgery, implant placement in the premolar region, and open reduction of parasymphyseal fractures, and it presents as numbness or dysesthesia over the chin and lower lip. For aesthetic and reconstructive work, this profile also frames the relationship between the mandibular symphysis, the mentolabial fold, and the lower lip, which guides genioplasty, alloplastic chin implant placement, and filler injection planes while avoiding intravascular or intraneural complications. Use this illustration for head and neck anatomy teaching on facial landmarks and cutaneous innervation, for oral and maxillofacial surgery texts discussing the mental foramen and anterior mandibular approaches, and for dermatology or plastic surgery materials on chin contouring and perioral injection safety. Anatomical accuracy verified by SciePro's Medical Advisory Board.