Chin

Description

Centered on the lower face, the anterior chin region is rendered with the mandible’s mental protuberance highlighted in blue, corresponding to the pogonion in cephalometric landmarking. Soft tissues overlying the mandibular symphysis are shown in natural proportions, with the chin pad and expected contour over the mentalis muscle forming the midline prominence inferior to the lower lip. Lateral to the midline, the chin surface transitions toward the parasymphyseal body of the mandible where the mental foramen lies deep to the skin, typically near the level of the second premolar. Skin tone and facial features are presented as a Black adult female phenotype for demographically appropriate teaching and publishing contexts. Anterior chin anatomy matters because small differences in projection and symmetry guide both diagnosis and intervention, from orthodontic treatment planning to maxillofacial trauma assessment. Mental nerve injury, often occurring with parasymphyseal fractures or during incision and dissection for genioplasty, produces numbness of the lower lip and chin that maps directly onto this highlighted region. For injectors, this surface topography also frames safe placement of fillers and implants around the pogonion while respecting the mental foramen region and the mentalis, where overdissection or product migration can create chin ptosis and an unnatural labiomental fold. Landmarks drive outcomes. Use this asset for head and neck anatomy courses, orthodontic and cephalometric education, oral and maxillofacial surgery texts on genioplasty and mandibular fracture patterns, and patient-facing counseling materials where clear depiction of the chin pad and mental protuberance supports informed consent. Anatomical accuracy verified by SciePro's Medical Advisory Board.