Hawley retainer

Hawley retainer

1. Hawley retainer Dr. Saleh Ahmed Alwadie BDS, BSC, high Dip Laser Dent& high dip of health media . Dentist and Dental Orthodontic Technologist trainer . Dr.Saleh Alwadie 1

2. Dr.Saleh Alwadie 2

3. Types Of Retainer Dr.Saleh Alwadie 3

4. Hawley Retainer Dr.Saleh Alwadie 4

5. Essix Retainer Dr.Saleh Alwadie 5

6. Bonded retainer Dr.Saleh Alwadie 6

7. Hawley retainer * Designed by Charles A Hawley . * Used passively to retain teeth in their new position following orthodontic treatment. * Most frequently used as retainer. Dr.Saleh Alwadie 7

8. Consists of hR : * Acrylic baseplate * Adam clasps on 6s * Labial bow with U loops. Dr.Saleh Alwadie 8

9. Indications: * Hold teeth in a new position after dentition has been orthodontically corrected. * Prevent relapse while bone fill occurs around the roots of the moved teeth. * Minor tipping movement of teeth mesio -distally and buccally . * Correct simple anterior crossbites . Dr.Saleh Alwadie 9

10. Modification: Acrylated labial bow : to improve control of rotated teeth Dr.Saleh Alwadie 10

11. Soldered labial bow to Adams .c bridge : to minimize space re-opening in extraction site Dr.Saleh Alwadie 11

12. Incorporate a bite plane for deep OB cases. Dr.Saleh Alwadie 12

13. ADVANTAGES * Simple to construct. * Fabricated in lab, resulting in a reduced chair time. * Can be removed for brushing, flossing and social reasons. * Acrylic palate is rigid → offers significant anchorage, maintains transverse expansion. * Versatile → easily modified, and can be adjusted for finishing of treatments. * Durable → can last for several years. Dr.Saleh Alwadie 13

14. DISADVANTAGES * Success depends on patient compliance. * May be considered unaesthetic due to labial bow. * Speech might be impaired. * Wire crosses the occlusal plane. * Only tipping movements are possible. * Rotated teeth are extremely difficult to correct. Dr.Saleh Alwadie 14

15. How to fabricating HR Adams clasp :- is the most retentive on fully erupted teeth * 0.028-inch W * Cut the interdental papilla on both side of the teeth. Dr.Saleh Alwadie 15

16. Hawley labial bow * The labial bow aids in appliance retention and maintains alignment of anterior teeth after orthodontic treatment. * 0.030 inch W Dr.Saleh Alwadie 16

17. Dr.Saleh Alwadie 17

18. Dr.Saleh Alwadie 18

19. Acrylic base * prepare the models . * Separating medium, secure wires to model with wax and soaked in water for 5 min . * Salt & Pepper method involved applying monomer and polymer directly to the model . * curing the appliance in warm/humid ( 120F / 49C)pressure pot under 20-30 psi for 12-15 min. Dr.Saleh Alwadie 19

20. Acrylic trim * Lower R thickness=3-4 mm and the upper = 2.5-3 mm * Using a grinding stone. Dr.Saleh Alwadie 20

21. Use carbide burs in the handpiece Dr.Saleh Alwadie 21

22. Finishing. * Sandpaper mandrel and 150 grit strip of sandpaper in the handpiece . * wet medium-grade pumice is applied with a wet wheel on the low-speed lathe.( Tripoli wheel ). Dr.Saleh Alwadie 22

23. Polishing Smooth polished surface of dental prostheses is important to prevent bacterial colonization and plaque accumulation. Dr.Saleh Alwadie 23

24. Dr.Saleh Alwadie 24