Mixed Dentition Pg 57-68

Question 1

Main difference between permanent and mixed dentition in analysis

Answer 1

Arch width and length cannot be determined in mixed

Question 2

Why Arch width and length cannot be determined in mixed dentition

Answer 2

🔸Permanent premolars haven’t erupted
🔸Primary molars still present

Question 3

Prediction methods for available space for permanent teeth

Answer 3

🔸Moyers
🔸Tanaka-Johnston
🔸Droschl

Question 4

Permanent teeth present in early mixed dentition

Answer 4

🔸Incisors (central and lateral)
🔸First molars

Question 5

Prediction of space in mixed dentition related to

Answer 5

Posterior teeth (supporting area)

Question 6

🔸Consider available space for eruption of canines and premolars
🔸MD widths of mandibular permanent incisors measured and summed(Si)
🔸On prediction table- closest value to Si located
🔸Boley gauge set to sum of mandibular central and lateral incisor
🔸One tip on incisive point and other along dental arch on left side
🔸Distal end of point marked
🔸Distance between marked point and mesial surface of first molar measured and difference calculated- made from left and right sides in mandible and maxilla

Answer 6

Moyers prediction values

Question 7

Moyers prediction called for required space for eruption of permanent canines and premolars are based on

Answer 7

Sum of MD widths of mandibular incisors (Si)

Question 8

With Moyers prediction values, if measured distance consistent with probability value in table

Answer 8

There is sufficient space for permanent canine and premolars

Question 9

With Moyers prediction values, if measured distance is smaller than probability value in table

Answer 9

There is a space deficiency for the quadrant

Question 10

🔸Prediction of available space in supporting area
🔸Based on sum of MD widths of mandibular permanent incisors(Si)
🔸Prediction values according to gender
🔸Applied moyers probability tables

Answer 10

Droschl prediction values

Question 11

🔸Simplified method for predicting widths of unerupted teeth in supporting area
🔸does not require probability values
🔸Sum of MD widths of mandibular incisors(Si) calculated-
▪️for maxillary canines and premolars in one quadrant- 11mm added to one half of the sum of mandibular incisors (Si)
▪️For mandibular canines and premolars in one quadrant 10.5 mm is added to one half the sum of mandibular incisors

Answer 11

Tanaka-Johnston prediction values

Question 12

In the analysis of occlusion in the mixed dentition, normal anterior segment has buccal surfaces of mandibular anterior teeth occlusion with

Answer 12

Palatial surfaces of maxillary teeth

Question 13

Mixed dentition Occlusal Discrepancies of anterior segment in Sagittal plane

Answer 13

🔸Increased Overjet
🔸Egde to edge bite
🔸Anterior cross bite with or without reverse Overjet
🔸Distal occlusion
🔸Mesial occlusion

Question 14

In the occlusion of the mixed dentition, posterior segment- the canine occlusion line is drawn from midline of maxillary primary canine crown to

Answer 14

Contact point between mandibular primary canine and first molar

Question 15

In the occlusion of the mixed dentition, posterior segment- the molar occlusion line is drawn on the MB cusp of the maxillary first molar to

Answer 15

🔸The buccal grove of the mandibular first molar
(Aligned in terminal step when distal surface of mandibular second primary molar is mesial to distal surface of maxillary primary molar

Question 16

Distal surfaces of mandibular and maxillary second primary molars should be on

Answer 16

The same vertical plane

Question 17

🔸MB groove of mandibular first molar distal to MB cusp of maxillary first molar
🔸Distal surface of mandibular primary canine is distal to mesial surface of maxillary canine

Answer 17

Distal occlusion in mixed dentition

Question 18

🔸MB groove of mandibular first molar is mesial MB cusp of maxillary first molar
🔸Distal surface of mandibular primary canine mesial to mesial surface of maxillary canine

Answer 18

Mesial occlusion in mixed dentition

Question 19

Occlusion in the mixed dentition, transverse discrepancies evaluated

Answer 19

As the permanent dentition

Question 20

Occlusion in the mixed dentition- transverse discrepancies of the anterior segment

Answer 20

Mandibular midline deviation

Question 21

Occlusion in the mixed dentition- transverse discrepancies of the posterior segment

Answer 21

🔸Posterior cross bite
🔸Cusp to cusp bite
🔸Lingual cross bite
🔸Buccal cross bite

Question 22

Occlusion in the mixed dentition- verticle discrepancies of the anterior segment

Answer 22

🔸Overbite (moderate, deep, severe)
🔸Anterior open bite

Question 23

Occlusion in the mixed dentition- verticle discrepancies of the posterior segment

Answer 23

Posterior open bite

Question 24

Analysis and biometric measurements of the dental arches and occlusion in the primary dentition are not performed because

Answer 24

🔸Not all teeth present yet
🔸Tooth status described instead(shape and size of teeth)+(shape of arches)

Question 25

Primate spaces in the mandible are between

Answer 25

Mandibular canine and first premolar

Question 26

Primate spaces in the maxilla are between

Answer 26

Maxillary lateral incisor and canine

Question 27

If the primary dentition doesn’t have primate spaces

Answer 27

75% probability of space deficiency for permanent teeth

Question 28

If anterior teeth in primary debt are crowded and rotated

Answer 28

100% chance of malocclusion in early mixed dentition

Question 29

3 planes of occlusion in primary dentition

Answer 29

🔸Sagittal 🔸Transverse 🔸Vertical

Question 30

Occlusion in primary Dentition- Sagittal discrepancies anterior segment

Answer 30

🔸Increased Overjet 🔸Edge to edge bite 🔸Anterior cross bite with/without reverse Overjet

Question 31

Occlusion in primary Dentition- posterior segment canine occlusion line is from midline of maxillary primary canine to

Answer 31

Distal surface of mandibular primary canine

Question 32

Occlusion in primary Dentition- posterior segment second primary molar occlusion line is from mesio-buccal cusp of maxillary second primary molar to

Answer 32

Buccal groove of mandibular second primary molar

Question 33

Variations in relationships between distal surfaces of maxillary and mandibular secondary molars

Answer 33

🔸Mesial step 🔸Terminal plane 🔸Distal step

Question 34

🔸Distal surface of mandibular primary second molar is mesial to distal surface of maxillary primary second molar

Answer 34

🔸Mesial step 🔸Most favourable for development of occlusion

Question 35

🔸Distal surface of maxillary and mandibular second molars are on same vertical plane

Answer 35

🔸Terminal plane 🔸Borderline pathological position

Question 36

Distal surface of mandibular primary second molar distal to distal surface of maxillary primary second molar

Answer 36

🔸Distal occlusion 🔸Predisposition for distal occlusion of permanent first molars

Question 37

Occlusion In the transverse plane of primary dentition is evaluated

Answer 37

As permanent and mixed dentition

Question 38

Occlusal discrepancies primary dentition-transverse plane anterior segment

Answer 38

Mandibular midline deviation

Question 39

Occlusal discrepancies primary dentition-transverse plane posterior segment

Answer 39

🔸Posterior cross bite 🔸Cusp to cusp bite 🔸Lingual cross bite 🔸Buccal cross bite

Question 40

Occlusal discrepancies primary dentition-Vertical plane, normal overbite is within

Answer 40

Incisal third of mandibular incisors(1/2 the clinical crown)

Question 41

In primary dentition, the normal overbite is within the Incisal third of mandibular incisors(1/2 the clinical crown) due to

Answer 41

🔸shorter clinical crown 🔸early enamel abrasion

Question 42

Occlusal discrepancies primary dentition-vertical plane anterior segment

Answer 42

Severe overbite (incisal edges of maxillary teeth within cervical third of mandibular teeth)

Question 43

Occlusal discrepancies primary dentition-vertical plane posterior segment

Answer 43

Posterior open bite