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Figure A-28 Maxillary anterior teeth, labial, incisal and lingual views

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Figure A-29 Maxillary anterior teeth, mesial and distal views

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Figure A-30 Mandibular anterior teeth, labial, incisal and lingual views

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Figure A-31 Premolars, buccal, lingual and occlusal views

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Figure A-32 Premolars, mesial view

------------ Cervical 1/3

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As you compare the maxillary and mandibular first, second, and third molars

(Figure A-33), notice that from the first to the third molars the crowns are progressively

shorter, roots are progressively shorter, and roots are progressively less divergent. Note

(Figure A-34) that the tallest cusps of the maxillary and mandibular molars are the

mesiolingual cusps and that the maxillary first molar has a lingual depression.

Figure A-33 Molars, buccal view Figure A-34 Molars, lingual view

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Notice in Figure A-35, that the oblique ridges (distobuccal cusp triangular ridge

and mesiolingual distal cusp ridge) are present on all maxillary molars, the distolingual

cusps are progressively smaller from the maxillary first to the third molar, and the

mesiodistal and buccolingual dimensions are progressively smaller from the maxillary

first to the third molar.

Figure A-35 Maxillary molars, occlusal view

Notice in Figure A-36, that the mandibular first molar has five cusps, two buccal

grooves, and no transverse ridges. The second and third molars have four cusps, one

buccal groove, and the possibility of two transverse ridges. Also notice mesiodistal and

buccolingual dimensions are progressively smaller from the maxillary first to the third

molar.

Figure A-36 Mandibular molars, occlusal view

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Figure A-37 Cusp-to-marginal ridge and cusp-to-fossa occlusion

Notes:

1. Sometimes referred to as the "normal" or "ideal" occlusal scheme.

2. The distal cusp of the mandibular first molar also does not contact the opposing teeth.

3. The mandibular central incisor, lateral incisor, and canine only have one contact.

4. The mandibular lateral incisor's contact is with the maxillary central incisor's distal

marginal ridge.

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Figure A-38 Cusp-to-fossa occlusion

Notes:

1. Same notes apply as for the cusp-to-marginal ridge and cusp-to-fossa occlusion.

2. All contacts are with the opposing tooth that has the same named, e.g., the maxillary

first premolar only occludes with the mandibular first premolar, the mandibular first

molar only occludes with the maxillary first molar, etc.

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Memorize the locations where the maxillary canine and the MB cusp of the

maxillary first molar occlude in Figure A-39 and A-40. You can then find your what

occludes in the test question.

Figure A-39 Static occlusal relationships

Figure A-40 Static occlusal diagram

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Figure A-41 Dentition from 5 months to 6 years

From Nelson SJ, , Ash MM.

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Figure A-42 Dentition from 7 years to adulthood

From Nelson SJ, Ash MM.

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Note bulges on mesiobuccal of maxillary and mandibular primary molars.

Figure A-43 Primary Dentition

From Nelson SJ, Ash MM.

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Figure A-44 Primary Dentition

Modified from Nelson SJ, Ash MM.

Figure A-45 Angle's Classifications for First Molar Alignment

From Ash MM, Ramjford S. Occlusion 4th Edition.