Overjet or horizontal overlap.<unk>  is the extent of vertical (superior-inferior) overlap of the maxillary central incisors over the mandibular central incisors, measured relative to the incisal ridges. The term<unk>  does not refer to a specific condition, nor is it a form of malocclusion. Rather an absent or excess<unk>  would be a malocclusion. Normal<unk>  is not measured in exact terms, but as a proportion (approximately 30–50% of the height of the mandibular incisors) and is commonly expressed as a percentage.
Overbite
Crossbite
Frostbite
Snakebite
Nasal fracture
Glossoptosis
Abrasion 
Caviar tongue