TWEED MERRIFIELD
EDGEWISE APPLIANCE
INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandentalacademy.co...
CONTENTS
The Class II force system
Dental completion
Denture recovery

www.indiandentalacademy.com
The class II force system
A new force system of forces
Careful study of cusp relationship
Final diagnostic decision bas...
Guidelines 1]ANB less than 5 ,patient is cooperative
max 3rd molar-missing
-present /approaching eruption
 2]ANB of 5-8,...
Orthodontic correction of the ClassII
dental relationship
 Mandibular archwire
-0.0215x0.028 stabilizing archwire
-1st ,2...
 Maxillary arch
-0.020x0.025 archwire
-Closed helical bulbous loops
-1st ,2nd order bends.
-Gingival spur distal to 2nd p...
 Class II lay on hooks with
gingival extension distal to
lateral incisor
 Closed helical bulbous loops
opened on each si...
 Force system employed for 1 month.
 Mandibular archwire is removed ,checked and activated
 Activation of max archwire ...
 When Class I relationship
of 2nd molar have been established
closed coil spring is compressed
 Elastic chain stretched ...
 After 1st molars are moved distally max 2nd premolar is
moved distally followed by max canine
 4 months position the po...
 0.020x0.025 max archwire with
7 mm closing loops +order
bends +gingival hooks
 Closing loop opened +mild
Class II+anter...
Denture completion
 Order bends placed in
0.0215x0.028 archwire.
 Mandibular archwire duplicates
anchorage preparation
a...
 Forces are based on arrangement of each tooth, relation
of one arch to other and relationship of arches to the
environme...
 Characteristics observed at end of the stage of
treatment
 1]incisors aligned
 2]occlusion overtreated
 3]anterior te...
DENTURE RECOVERY
 Ideal result after all mechanics are discontinued
and uninhibited function and other
environmental infl...
 Tweed occlusion or transitional occlusion
characterized by disclusion of 2nd molars and
distal cusps of 1st molars.
 It...
The muscles of swallowing expression
,and mastication involved in determining
final stable ,esthetic relationship of the
...
Thank you
For more details please visit
www.indiandentalacademy.com

www.indiandentalacademy.com
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Tweed merrifield /certified fixed orthodontic courses by Indian dental academy

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The Indian Dental Academy is the Leader in

continuing dental education , training dentists

in all aspects of dentistry and offering a wide

range of dental certified courses in different

formats.

Indian dental academy provides dental crown &

Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit

www.indiandentalacademy.com ,or call
0091-9248678078

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Tweed merrifield /certified fixed orthodontic courses by Indian dental academy

  1. 1. TWEED MERRIFIELD EDGEWISE APPLIANCE INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  2. 2. CONTENTS The Class II force system Dental completion Denture recovery www.indiandentalacademy.com
  3. 3. The class II force system A new force system of forces Careful study of cusp relationship Final diagnostic decision based on 1]ANB relationship 2]Max posterior space analysis 3]patient cooperation www.indiandentalacademy.com
  4. 4. Guidelines 1]ANB less than 5 ,patient is cooperative max 3rd molar-missing -present /approaching eruption  2]ANB of 5-8, Patient is cooperative. Max 3rd molar normally erupting  3]ANB greater than 10,patient’s cooperation is questionable+max 3rd molars are present  Facial balance and harmony should be considered before making decision www.indiandentalacademy.com
  5. 5. Orthodontic correction of the ClassII dental relationship  Mandibular archwire -0.0215x0.028 stabilizing archwire -1st ,2nd ,3rd order bends -Loop stops 0.5 mm short of molar tubes -Gingival spurs distal to lateral incisors www.indiandentalacademy.com
  6. 6.  Maxillary arch -0.020x0.025 archwire -Closed helical bulbous loops -1st ,2nd order bends. -Gingival spur distal to 2nd premolar -Gingival high pull headgear hooks distal to central incisor www.indiandentalacademy.com
  7. 7.  Class II lay on hooks with gingival extension distal to lateral incisor  Closed helical bulbous loops opened on each side and ligated  8 ounce class II elastics  Anterior vertical elastics  High pull headgear www.indiandentalacademy.com
  8. 8.  Force system employed for 1 month.  Mandibular archwire is removed ,checked and activated  Activation of max archwire repeated until 2nd molar has class I www.indiandentalacademy.com Second molar distalization
  9. 9.  When Class I relationship of 2nd molar have been established closed coil spring is compressed  Elastic chain stretched from 2nd molar to 1st molar. -Class II elastic -Anterior vertical elastic -High pull headgear www.indiandentalacademy.com First molar distalization
  10. 10.  After 1st molars are moved distally max 2nd premolar is moved distally followed by max canine  4 months position the posterior teeth into overcorrected class I relationship. . Second premolar distalization www.indiandentalacademy.com Canine distalization
  11. 11.  0.020x0.025 max archwire with 7 mm closing loops +order bends +gingival hooks  Closing loop opened +mild Class II+anterior vertical elastic +High pull headgear  Maxillary space is closed www.indiandentalacademy.com
  12. 12. Denture completion  Order bends placed in 0.0215x0.028 archwire.  Mandibular archwire duplicates anchorage preparation archwire  Maxillary archwire with artistic bends and hooks for headgear ,vertical and class II elastics. www.indiandentalacademy.com
  13. 13.  Forces are based on arrangement of each tooth, relation of one arch to other and relationship of arches to the environment .  Progress ceph and tracing evaluated to determine mand incisor position, minor control of planes lingual root torque in max incisors.  Visual observations permit evaluation of lip line ,max incisor relationship, amount of cusp seating and artistic positioning of incisors.  This step is considered as mini treatment of malocclusion . www.indiandentalacademy.com
  14. 14.  Characteristics observed at end of the stage of treatment  1]incisors aligned  2]occlusion overtreated  3]anterior teeth in edge to edge  4]max canine and 2nd premolar in class I  5]max 1st molar mb cusp in mb groove of man 1st molar  6]distal cusp of 1st molar and 2nd molar out of occlusion  7]all spaces closed tightly www.indiandentalacademy.com
  15. 15. DENTURE RECOVERY  Ideal result after all mechanics are discontinued and uninhibited function and other environmental influences stabilize and finalize the position of dentition.  Forces involved are of muscles and periodontium  Certain tooth and denture changes tend to revert toward their original position .  www.indiandentalacademy.com
  16. 16.  Tweed occlusion or transitional occlusion characterized by disclusion of 2nd molars and distal cusps of 1st molars.  It allows muscles of mastication to effect the greatest force on the primary chewing table in midarch area.  Class I and class II deep-bite patients -anterior teeth positioned in an end-to-end relationship Transitional occlusion www.indiandentalacademy.com
  17. 17. The muscles of swallowing expression ,and mastication involved in determining final stable ,esthetic relationship of the teeth –functional occlusion Final occlusion www.indiandentalacademy.com
  18. 18. Thank you For more details please visit www.indiandentalacademy.com www.indiandentalacademy.com

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