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 .
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2. DR.SALEH ALWADIE 2

3. Types Of Retainer
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4. HAWLEY
RETAINER
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5. ESSIX
RETAINER
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6. BONDED
RETAINER
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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.
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8. CONSISTS OF HR:
* Acrylic baseplate
* Adam clasps on 6s
* Labial bow with U
loops.
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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.
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10. MODIFICATION:
•Acrylated labial bow : to improve control of rotated teeth
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11. Soldered labial bow to Adams .c bridge : to minimize space re-
opening in extraction site
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12. Incorporate a bite plane for deep OB cases.
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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.
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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.
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16. HAWLEY LABIAL BOW
•* The labial bow aids in appliance retention and maintains
alignment of anterior teeth after orthodontic treatment.
•* 0.030 inch W
•
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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.
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20. ACRYLIC TRIM
* Lower R thickness=3-4 mm and the upper = 2.5-3 mm
* Using a grinding stone.
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21. USE CARBIDE BURS IN THE HANDPIECE
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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 ).
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23. POLISHING
Smooth polished surface of dental prostheses is important to
prevent bacterial colonization and plaque accumulation.
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