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23 Cards in this Set
- Front
- Back
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Centric Occlusion |
Voluntary position of the dentition that allows maximum contact between the arches |
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Ideal Occlusion |
Perfect interdigitation between Mx and Md teeth, 1/3 overbite and each Mx. tooth is distal to its Md counterpart by 1/2 a tooth |
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Centric Relation |
Mandible is in the most retruded position where it can be controlled by muscles and ligaments. Ideally, CR=CO |
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Centric Stops |
3 areas of contact between the arches. Height of cusp contour Marginal Ridges Central Fossae |
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Phases of Arch Development |
1. First molars erupt 2. Permanent anterior teeth erupt 3. Premolars erupt, helping form dental arches 4. Canines and 2nd molars erupt 5. 3rd molars erupt |
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Leeway Space |
Space created by the difference in size between primary molars and permanent premolars |
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Curve of Spee |
Anteroposterior curve formed by incisal and occlusal surfaces of teeth. Mx is convex, Md is concave |
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Curve of Wilson |
Lateral curve that occurs when a frontal section is taken through each set of molars |
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Lateral occlusion |
Moving the mandible to the right or left. Will show a canine rise or group function. The working side is where it is moved to, the balancing side is the opposite side |
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Protrusive Occlusion |
Mandible is moved forward with anterior teeth in contact |
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Mandibular Rest Position |
Shows 2-3 mm of space between the arches, also called freeway space |
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Terminal Plane |
Ideal Molar relationship in primary teeth |
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Flush terminal plane |
Primary molars are end-to-end |
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Mesial Step |
Primary Md 2nd molar is mesial to the Mx molar (ideal or normal) |
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Distal Step |
Primary Md 2nd molar is distal to the Mx molar (abnormal) |
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Primate spaces |
Interproximal spaces between primary teeth that save room for permanent teeth |
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Angles of Classification |
Doesn't recognize mandible/maxilla size Doesn't address differences in CRCO May be different classes on each side |
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Parafunctional Habits |
Not within normal range of motion associated with mastication or speech Clenching Bruxism Chewing on objects Thumb sucking |
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Orofacial Myofunctional Disorders |
Disturbance in normal function of orofacial musculature Tongue thrusting or interlabial gap |
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Class II Malocclusion |
MB cusp of Mx 1st molar occludes mesial to MB groove of Md 1st molar |
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Division I |
Mx anteriors protrude facially, palate is narrow, facial profile is retrognathic |
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Division II |
Mx anteriors are upright or retruded, overbite is severe but palate is normal. Facial profile is usually mesognathic |
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Class III Malocclusion |
MB cusp of Mx 1st molar occludes distal to MB groove of Md first molar. Usually produces anterior crossbite or edge-to-edge relationship |
