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12 mars 2007 1 12 /03 /mars /2007 19:44

 

In this topic we suppose that only the incisors are involved and all

other occlusal parameters are normal.

The movement into a more normal configuration is done to allow the dog

a more comfortable chew, and reduce incidence of periodontal disease.






What are the problems to solve :


• 
Stability of the wire

•  Reduction of the slide effects

•  To make easier the distal movement of the arch

 •  To avoid the loss of the wire elasticity

•  To increase the quality of the sealing and the anchorage

•  Reduction of inflammatory and infectious effects

 




1) 
Stability of the wire



To improve the stability on the incisors vestibular side :


- we must increase the surface of the wire area

 
- by adding an outer covering to the wires so :

            * it increase the scraping surface

            * it reduce the wounds in the the event of sliding on the gum


- we add elastic rings to hang up the wire to canines

 
 
 

 

2) Reduction of the slides effects  



Two mains slide effects :


-  Rostrally version of mandibular canine tips
-  Linguoversion of mandibular canine tips

       * Rostrally version can be prevent with efficiency by setting acrylic gutters at the back of the band to extend the anchorage to premolar teeth.

      * Linguoversion is counted by setting a (split) flying buttress between the canine teeth.





3) To make easier the distal movement of the arch



The constant pressure must be applied on the arch only if there is a sufficient space

If the teeth are too closed (small interproximal space), make room for…



      Make room for :

            - by cutting the lateral cuspids of some incisors !!

            - by using an expansion screw to « open » the mandibular incisors arch

 
 

                    Expansion screw (base narrow dentition)

 

 



4) To increase the quality of the sealing and the anchorage


Use a goood bonding : ex. Ortho Fuji LC






5) To avoid the loss of the wire elasticity


Do not soldering the wire directly on the ring because it damages the metal elasticity

Use a low diameter arch to improve the « resilience » of the wire

 





Vews of new trend :

                       The double arch
double-arch.jpg
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A clinical case :



Using a "tomas screw" and an "eyelet bracket" for lower incisor correction. Incisor 31 is in vestibular malposition. The treatment performed use an orthodontic screw in the mandibular bone, a bracket (eyeled shape) bonded on the vestibular face of the incisor and two chains.


new-trend4.jpg.
controle.jpg
A radiograph taken  to verify  the good position of the screw




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  • : Odonto-stomatologie canine et feline. Orthodontie
  • Odonto-stomatologie canine et feline. Orthodontie
  • : Odonto-stomatologie vétérinaire. Techniques de corrections orthodontiques chez le chien et le chat, traitement endocanalaire, traitement des néoplasies, restauration dentaire
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