7 - Mixed Dentition Analysis Flashcards
moyers analysis uses analysis based on what measurements
mixed dentition space analysis based on measurement of mandibular permanent incisors
what is a quantitative assessment of crowding based on measurements compared to AVERAGES of large data set
moyers analysis
advantages of moyers analysis
used for both arches, can take measurements from casts or in mouth, does not rely on radiographic interpretation
disadvantages of moyers analysis
probability analysis based on averaged date, averaged data set of undefined parameters
where do you gets measurements fro moyers analysis
measured in mm on cast or in mouth with Boley gauge
steps for Moyers analysis
tanaka johnston uses measurement based on what
mixed dentition space analysis based on measurement of mandibular permanent incisors
what is a quantitative assesment of crowding based on measurements and a MATHEMATICAL FORMULA developed by COMPARED AVERAGES of large data set
tanaka johnston anlysis
advantages of tanaka johnston
can be used for both arches, can take measurements from casts or in the mouth, does not rely on radiographic interpretation
disadvatnages of tanaka johnston
probability analysis based on averaged date, average data set of undefined parameters
steps for tanaka johnston
formulas for tanaka johnston
bolton analysis is what type of mixed dentition analysis
An inter-arch proportional analysis used to determine if there is a tooth size discrepancy between the upper and lower teeth
When do you typically perform bolton analysis
early permanent dentition
steps for bolton analysis
what do the different ratios that are more or less than 91.3% mean for bolton analysis?
more than 91.3 = maxillary teeth are relatively too small compared to mandibular teeth
less than 91.3 = maxillary teeth are relatively too large compared to mandibular teeth
can you use pano rx for mixed dentition analysis?
yes BUT lacks image detail to accurately diagnose early carious lesions
Why do use pano rx as a mixed dentition analysis technique
- extraoral radiograph may be more tolerable for extremely fearful or anxious child
- large field of view is helpful in monitoring growth and dvelopment as well as screening pathology
- should be considered supplemental to intraoral techniques rather than a substitute
when are pano rx taken for the first time
early mixed dentition during time of incisor transition
when are pano rx indicated
any time in the primary dentition if suspected pathology or for evaluation after orofacial trauma
patients in the classic mixed dentition (permanent molars and incisors with primary molars and canines) should havepano film taken when
if they have not yet had one to screen for pathology and evaluate growth and development with emphasis placed on looking for missing/extra teeth and permanent canine position
how often should pano be taken
depends on patients individual needs, but from age 8-18 it’s prudent to consider taking it approximately every 3 years
steps for mixed dentition analysis with pano
what does “Rule of 3’s” mean
some instructors suggest counting in 3’s to determine the presence of the permanent (3-4-5)
e.g., look for premolar and canine groups that are unerupted
