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URA Components

URA Components. Marshitah binti Ab Wahid (1090040) Mohd Azizul Mohd Atan (1090042) Abdullah Zahid Azhari (1090043). Components Of Removable Applaince. Active Components Retentive Components Anchorage Base Plate. ACTIVE COMPONENTS. Springs Screws Elastics . Z-spring.

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URA Components

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  1. URA Components MarshitahbintiAb Wahid (1090040) MohdAzizulMohdAtan (1090042) Abdullah ZahidAzhari (1090043)

  2. Components Of Removable Applaince • Active Components • Retentive Components • Anchorage • Base Plate

  3. ACTIVE COMPONENTS Springs Screws Elastics

  4. Z-spring • Stainless steel wire • 0.5mm diameter • Function: -proclination of 1 or 2 incisors -to correct mild rotation if only 1 helix is activated

  5. T-spring • For incisor, 0.5mm diameter stainless steel(SS) wire • For premolar, 0.6mm diameter SS wire • Function: -for proclination of incisors or premolar

  6. Finger spring • For incisor, 0.5mm SS wire • For canine and premolar, 0.6mm SS wire • Function: -for mesial or distal movement

  7. Labial bow • 0.7mm diameter SS wire • Function: -for retraction of anterior teeth

  8. Split labial bow • 0.7mm diameter SS wire • Function: -retraction of anterior teeth -to close diastema

  9. Robert retractor • 0.5mm diameter SS with sleeve • Function: -retraction of anterior teeth

  10. Buccal canine retractor • 0.7mm diameter SS wire • Function: -palatal and distal movement of mesially angulated canine

  11. Coffin spring • 1.25mm diameter SS wire • Function: -transverse expansion -buccalcrossbite correction

  12. Screw • Function: -for expansion of arch -for distalization of molar teeth -May be used for moving one tooth or group of teeth (usually more than one tooth to be moved with a screw) -Have different sizes and range of activation -Useful only when a few millimeters of space is needed -Clasps for retention • Expansion is 1 mm. per one full turn i.e. 0.25 mm. per quarter turn

  13. Elastics • Rubber or latex rings • Function: -extra-oral traction -inter-maxillary traction • However, it depends largely on the patient cooperation

  14. Retentive components • Adam’s clasp • Southend clasp • Labial bow • Ball-ended clasp • Delta clasp

  15. Adam’s clasp • The most useful clasp in removable appliances. • It is designed to engage the MB, DB undercuts of posterior teeth. • Advantage, it does not separate teeth and has excellent retention.

  16. Components of Adam’s Clasp 1- Arrow heads 2- Bridge 3- Tags 4- Retentive parts It is made of 0.7 mm diameter hard St. St. round wire Fabrication of Adam’s Clasp

  17. Southend clasp • 0.7mm diameter SS wire • Useful when distal movement of canine is required

  18. Labial bow • 0.7mm diameter SS wire • Function: -retention - important when mesial/distal movement is planned

  19. Ball-ended clasp • It like Adam, extends across the embrasure • Uses buccal undercuts for retention • Easy to fabricate • It is stiff that could not be extended deep into the undercuts • Provide minimal retention • Use 0.7mm diameter stainless steel wire

  20. Delta clasps • 0.7mm diameter SS wire • Difficult to adjust • Function like adams clasps, but it utilizes a helix on the mesial and distal undercuts for retention

  21. Anchorage Resistance to unwanted tooth movement BY equal in magnitude and opposite in direction

  22. Baseplate • It must be: -hold components -clear acrylic = heat cure, cold cure, autoresin -comfortable -good fit -can be active-act as bite plane

  23. References • http://www.retainerlab.com/Pages/Springs.htm • http://universal-dental-techniques.com • http://www.intelligentdental.com/2011/10/02/agapbetween-your-upper-front-teeth/ • http://dentallecnotes.blogspot.com/2011/10/note-on-active-components-of-removable.html • http://o-atlas.de/eng/kapitel5_156.php • http://askanorthodontist.com/braces/what-do-the-elastic-rubber-bands-on-braces-do/ • Lecture by Dr. Norzakiah(principles of removable appliance therapy-part 1) • Lecture by Dr. FitriOctavianti(types of orthodontic appliances)

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