| A | B |
|---|
| Mesial step | D of primary mand 2nd molar is mesial to D surface of primary max 2nd molar |
| Distal step | D surface of primary mand 2nd molar is distal to D surface of primary max 2nd molar |
| Terminal plane | D surfaces of primary 2nd molars are even with each other |
| Primate spaces | M to max canines & D to mand canines |
| Leeway space | space gained when primary molars exfoliate & perm premolars erupt |
| Curve of Spee | posterior curve of occlusal surfaces from canines to anterior border of ramus |
| Malocclusion | deviations from ideal occlusion |
| Centric occlusion | habitual way max & mand teeth occlude or fit together |
| Centric relation | mandible is in most retruded position ( as when we put head back) |
| Overjet | horizontal overlap |
| Overbite | vertical overlap of max anterior teeth (into I, M, or C 1/3 of mand anterior teeth) |
| Cross-bite | mand tooth is F to max tooth , or max tooth is L to mand tooth |
| Open bite | max & mand teeth do not occlude, max teeth do not overlap mand teeth |
| Labioversion/Buccoversion | tooth is labial or buccal to normal hors-shoe shape of the dental arch |
| Linguoversion | tooth is lingual to normal horse-shoe shape of the dental arch |
| Infraversion | tooth appears shorter than adjacent teeth & does not meet the occlusal plane |
| Supraversion | tooth appears longer & is erupted past the occlusal plane |
| Torsoversion | tooth is rotated |
| Distoversion | tooth tilts or drifts toward D |
| Mesioversion | tooth tilts or drifts toward M |
| Straight facial profile | lips are parallel to line from apex of nose to middle of chin |
| Convex facial profile | small receded chin, lips protrude outward |
| Concave facial profile | prominent chin, mand lip protrudes & max lips looks concave |
| Class I | MB cusp max 1st molar lines up with B groove mand 1st molar |
| Class II Div I | B groove mand 1st molar is D to MB cusp max 1st molar and anteriors are normal or facial |
| Class II Div II | B groove mand 1st molar is D to MB cusp max 1st molar & max centrals are retruded-max laterals are labial |
| Class III | B groove mand 1st molar is mesial to MB cusp of max 1st molar |
| Edge to edge | anterior teeth occlude incisal edge to incisal edge |
| End to end | posterior teeth occlude cusp to cusp |
| Lateral mandibular glide | jaw moves laterally with teeth lightly touching |
| Working side | side mandible moves toward |
| Balancing side | opposite of working side during lateral mandibular glide |
| Canine rise | canines are last teeth (and only teeth) touching on working side during lateral mandibular glide |
| Group function | teeth other than canines touch - no canine rise |
| Balancing interference | teeth on balancing side touch during lateral mandibular glide |
| Interocclusal clearance | space between arches when mandible is at rest - 2 to 3 mm |
| Checking occlusion | remember to check both sides |
