MIXED DENTITION ANALYSIS

 WHY — to predict the crowding of maxillary or mandibular arch
 Determines the space available vs the space required
 It is the best investigatory method for serial extarcation
 HOW (Moyer’s analysis) —𝒔𝒖𝒎 𝒐𝒇 𝒎𝒂𝒏𝒅𝒊𝒃𝒖𝒍𝒂𝒓 𝒊𝒏𝒄𝒊𝒐𝒓 𝒘𝒊𝒅𝒕𝒉 (𝒄𝒊+𝒍𝒊) / 𝟐
 The size of unerupted permanent canines and PMs are predicted from the knowledge of
the size of M-D width of mand incisors.
 Mxillary incisors are never measeared coz of high chance of variability. Mandibular is taken even to predict maxillary space discrepancy.
 Best analysis done = Stanley kaber analysis
 Tooth cause crowding in lower anterior region if early extracted: Primary mandibular first molar lower ie. D
 Most teeth responsible for crowding is: Lower E & upper D

SERIAL EXTRACTION:-
C D 4 — order * if discrepancy > 10mm
 Preferred — Dewel procedure
 Done at 8-9 years only if there is crowding!
 Anything before that extract ad give space maintainer.
 Go for double extraction if age 8-9 and crowding not present
 Advantages :
o Interceptive orthodontics
Easy ortho movement in future due to breakage of transseptal fibres — no relapse
o Helps eruption of permanent canine ?