Cleft of lower alveolar process; Cleft of lower gingiva; Cleft of lower gum ridge; Cleft of mandibular alveolar process; Cleft of mandibular gingiva; Notch of lower alveolar process; Notch of lower alveolar ridge; Notch of lower gum ridge; Notch of mandibular alveolar process; Notch of mandibular alveolar ridge