Final answer:
Andrew's Six Keys of occlusion are orthodontic principles outlining the ideal occlusion arrangement concerning molar relationships, crown angulation and inclination, absence of rotations, tight contacts, and a flat ocusal plane.
Step-by-step explanation:
Andrew's Six Keys of Occlusion are concepts within orthodontics that outline the ideal criteria for proper occlusion, which is the alignment and contact between teeth. Andrew's keys include molar relationship, crown angulation, crown inclination, absence of rotations, tight contacts, and flat occlusal plane. Unfortunately, as an online platform, providing a diagram isn't feasible, but I can explain each key:
- The molar relationship should be such that the mesiobuccal cusp of the upper first permanent molar fits into the buccal groove of the lower first permanent molar.
- Crown angulation (mesiodistal tip) refers to the correct tilt of the crowns of the teeth.
- Crown inclination (labiolingual tip) suggests that the crowns of the teeth should be tilted correctly on their long axis.
- Absence of rotations means that individual teeth shouldn't be turned or rotated from their proper alignment.
- Tight contacts imply that there should be no gaps between teeth, which are important for stability and to prevent food packing.
- The flat occlusal plane implies that cusps and incisal edges should align on a flat plane, avoiding excessive curves.
These keys are essential for an optimal bite, efficient chewing, aesthetic appearance, and overall oral health. If you're looking for a visual representation, textbooks, and orthodontic resources typically provide detailed diagrams of these concepts.