Occlusal key "First molars,the key to normal occlusion":Angle 1.They are the biggest teeth and their anchorage is strongest. 2.Their local position in the occlusal arch supports the main masticatory duty and operation. 3.They influence the vertical distance of upper and lower jaws,the occlusal height and aesthetic proportions. 4.As the permanent molars are the first erupting teeth of permanent dentition,they have "mighty"control on the teeth erupting later behind and in front of them,as they are forced to position to the already erupted and in occlusion functioning 1st molars. 190
Occlusal key 1. They are the biggest teeth and their anchorage is strongest. 2. Their local position in the occlusal arch supports the main masticatory duty and operation . 3. They influence the vertical distance of upper and lower jaws, the occlusal height and aesthetic proportions. 4. As the permanent molars are the first erupting teeth of permanent dentition, they have “mighty” control on the teeth erupting later behind and in front of them, as they are forced to position to the already erupted and in occlusion functioning 1st molars. “First molars, the key to normal occlusion”: Angle
Intercuspal occlusion:labial-lingual aspects Over jet and over bite Horizontal Vertical overlap overlap OVERJET:the projection of teeth beyond their antagonists in the horizontal plane. OVERBITE:the distance teeth lap over their antagonists as measured vertically. Overjet Overbite 190>
Intercuspal occlusion: labial-lingual aspects Over jet and over bite OVERJET: the projection of teeth beyond their antagonists in the horizontal plane. OVERBITE: the distance teeth lap over their antagonists as measured vertically
Over jet and over bite Normal overbite and overjet:2-4 mm Deep overbite Deep overjet 190> 学
Over jet and over bite Normal overbite and overjet: 2-4 mm Deep overbite Deep overjet
Open bite Edge to edge bite Cross bite
Edge to edge bite Cross bite Open bite
Over jet and over bite The overlapping of the maxillary teeth over the mandibular teeth has a protective feature: during opening and closing movements of the jaws,the cheeks, lips,and tongue are less likely to be caught. 4907 学 © G likely to be caught
Over jet and over bite The overlapping of the maxillary teeth over the mandibular teeth has a protective feature: during opening and closing movements of the jaws, the cheeks, lips, and tongue are less likely to be caught. likely to be caught