Flashcards in Summer Lab Deck (106)
What burs are mainly used in peds?
330 and 169L.
How many teeth do you isolate for a class I?
Only 1 tooth.
How many teeth do you isolate for a class II?
The adjacent teeth.
Do we do MODs?
How far below the gingival margin should a SSC be seated?
Size in Primary vs. Permanent
Primary is smaller in all dimensions, except for the primary molars which are larger than the succeeding premolars.
What is the one exception to the size comparisons of primary and permanent teeth?
Primary molars are larger than the succeeding premolars.
Compare the form of primary and permanent anatomic crowns.
Primary anatomic crows are shorter and wider and have a greater constriction at the CEJ.
Compare the form of primary and permanent molars.
Primary molars are narrower occlusally compared to the compared to the cervial dimension. Wider at the gingiva.
Compare the primary and permanent canines and molars
Primary have more prominent cervical contour.
Compare the enamel and dentin of primary and permanent teeth.
In primary, much thinner. Primary enamel rods in the gingival third run occlusal from the DEJ while in the permanent teeth, the rods run in a cervical direction.
Compare the pulp of primary and permanent teeth.
Primary teeth have larger pulp cavities relative to crown size. Primary molar pulp chamber outline follows the occlusal crown surface with horns under each cusp.
Which pulp horn in the primary molars is closest to the surface?
MESIAL pulp horns are closer to the distal horns. MB horn is the most prominent.
Compare the roots of primary and permanent teeth.
Primary roots are more divergent.
When is root development completed and when does resorption begin?
Root development is completed 1 year after eruption and resorption begins 1-2 years before exfoliation.
What are the proximal contacts like on primary dentition?
Broad and flat.
Compare enamel color of primary and permanent teeth?
Primary teeth are whiter.
Compare enamel hardness of primary and permanent teeth.
Primary undergoes greater attrition.
Do we use hand instruments in peds?
What is the isolation technique for primary incisors?
Small holes or slit technique or ligation with a slip knot placed under the cingulum.
What should the isthmus be for a class 1?
Shouldn't be more than 1/3 of the intercuspal distance?
What teeth have transverse ridges and how do you handle the restorations on those teeth?
DO NOT CROSS THE TRANSVERSE RIDGE! Present on A and J, the MX 2nd molars, and L and S, the MN 1st molars. It is a ridge running from the DB to the ML cusp.
Which teeth differ the most in morphology compared to their successor teeth?
MN primary 1st molars! Remember, these are the guys with the transverse ridge.
Which teeth do you need to be careful to not prep the wrong tooth?
ALL OF THEM. But, MN and MX 2nd primary molars are very similar to the adjacent first molar.
Which primary tooth differs the most in morphology from person to person?
MX 1st molars (B and I)
Which primary tooth most closely resembles premolars?
MX 1st molars.
Internal outline form of a class 1 prep.
Walls should be parallel to long axis of tooth, with straight convergence towards the occlusal.
How do you adapt your internal outline form if the caries takes you close to the marginal ridge?
Prep that wall divergent.
How far into dentin should the pulpal floor be?
0.5 mm into dentin. Slightly rounded via the 330 bur.