ch 1 sec 8-9 Flashcards
occlusion
refers to the relationship of the upper and lower teeth when they close together or contact one another during function or rest
tooth relationships are described in how many classes?
3 (1, 2, and 3)
ideal occlusion class 1
relationship between maxillary and mandibular dental arches, teeth should be close together in the maximum intercuspal position
maximum intercuspal position
best fitting together teeth
horizontal overlap of anterior teeth class 1
incisal edges of anterior maxillary teeth should horizontally overlap the mandibular
vertical overlap of anterior teeth class 1
incisal edges of maxillary anterior teeth should extend below the incisal edges of the mandibular teeth so that part of the incisal portion of mandibular incisors is hidden
relationship of posterior teeth class 1
maxillary posterior teeth are positioned slightly buccal to mandibular posterior teeth
relative alignment
vertical axis of midline of each maxillary tooth is slightly distal to the veritcal axis of its corresponding mandibular tooth
key factor in the definition of class 1 occlusion
the tip of the mesiobuccal cusp of the maxillary first molar is aligned directly over the mesiobuccal groove on the mandibular first molar
how many lobes does anterior teeth form?
3
anterior teeth develop from how many lobes?
4- 3 facial and 1 lingual
how many lobes on facial cusp of premolar?
3
how many lobes on lingual cusp of premolar?
1
two cusp type premolars forsm how many lobes?
4
three cusp type premolars form how many lobes?
5