MODEL GRADING SYSTEM
BUCCOLINGUAL INCLINATION (Cont'd)

 

Figure 12A

Figure 12B

 

If the discrepancy is greater than 2 mm (fig. 12a,b), then 2 points are subtracted for that tooth. No more than 2 points shall be subtracted for any tooth.

For transverse discrepancy cases, 7's can deviate 2mm with no points scored. If the discrepancy is from 2 mm to 3 mm, then 1 point is scored; if the discrepancy is greater than 3 mm, then 2 points are scored.

 

OCCLUSAL CONTACTS

This section of the evaluation determines the adequacy of occlusal contact of the premolars and molars. The buccal cusps of the mandibular premolars and molars (fig. 13) and the lingual cusps of the maxillary premolars and molars (fig. 14) should be contacting the occlusal surfaces of the opposing teeth. Each mandibular premolar has one functional cusp. Each mandibular molar has two functional buccal cusps. The maxillary premolars have one functional lingual cusp. However, the maxillary molars may have only a mesiolingual functional cusp.

 

figure 13                                         figure 14

 

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