MF NUMBERS

Question 1

% ectopic eruption?

Answer 1

1-3%

Question 2

What portion of Class II population is mandibular retrognathic?

Answer 2

75%

Question 3

Most common primary relationship?

Answer 3

Flush

Question 4

Phase I Class II showed skeletal improvement in ___%?

Answer 4

75%
- Ideal to start late mixed dentition so hit PVH (unless lower lip habit or muscular dysfunction habit —> start early)
- Treat one phase only

Question 5

What percent of crowding can be resolved with LLHA?

Answer 5

70-75%

Question 6

% of children with anterior open bite that will spontaneously correct with development of adult swallow?

Answer 6

80%

Question 7

% bone loss in 5 years? First 6 months? Over 5 year?

Answer 7

• 34%
• 23%
• 11%

Question 8

If allow canine to erupt into lateral area and then distalize, what percent bone loss/4 years?

Answer 8

1%

Question 9

0.4mg folic acid prevents cleft in what %?

Answer 9

25-50% (Actually 33%)

Question 10

% missing 3rd molars, mandibular premolar, maxillary lateral?

Answer 10

• 20% with 13x more common of missing another tooth
• 3.4%
• 2.2%

Question 11

Most common impacted teeth?

Answer 11

U8, L8, U3, Md 4/5

Question 12

Stability of anterior open bite treatment: surgery vs ortho?

Answer 12

82% surgery
75% ortho

Question 13

Increase in 1mm expansion: ____mm arch length

Answer 13

0.7mm

Question 14

What percent root formation for auto transplantation?

Answer 14

75%

Question 15

Alveolar graft for CL/P canine root formation?

Answer 15

50-75%

Question 16

SARPE relapse?

Answer 16

10% - most stable way to correct max transverse deficiency

Question 17

% relapse for RPE?

Answer 17

25%

Question 18

% relapse for 3 piece LeFort?

Answer 18

50%

Question 19

% relapse for maxillary impaction?

Answer 19

10% (drops down 2mm)

Question 20

Space needed for implant?

Answer 20

6mm - 1mm each side and 4mm for implant

Question 21

% extractions in private practice?

Answer 21

15-20%

Question 22

% of impacted canines? Which gender more common? % bilateral? Next to missing lateral?

Answer 22

• 1-2%
• 2x more in F
• 8% bilateral
• 2.4x next to missing lateral

Question 23

Which canines are more likely genetic, 85% have enough room, and 2/3?

Answer 23

Palatal

Question 24

Which canines are due to TSALD, 17% have enough room, and 1/3?

Answer 24

Labial

Question 25

Open vs closed for impacted canines?

Answer 25

Open: mixed dentition
Closed: Later

Question 26

Laterals should be ___% width of central incisor? Frontal view ____%. Width is ____% of length.

Answer 26

• 75%
• 62%
• 80%