Removable appliance

A presentation about removable appliance by Dr. Aziz.

1. WELCOME

2. CONSTRUCTION OF REMOVABLE APPLIANCES

3. Presented by Dr.Monwarul Aziz BDS, FCPS Part II Trainee Dept. of Orthodontics and Dentofacial Orthopedics, DDCH. Supervised by Prof. Dr. Md. Zakir Hossain BDS, PhD(Japan) Prof. & Head, Dept. of Orthodontics and Dentofacial Orthopedics,DDCH . CONSTRUCTION OF REMOVABLE APPLIANCES Co Supervisor Dr. Md. Muklesur Rahman ( Pinu ) BDS , FCPS Associate Professor Dept. of Orthodontics and Dentofacial Orthopedics, DDCH .

4. The first law of success is … concentration to bend all the energies to one point and to go directly to that point. INTRODUCTION

5. Removable mechanical appliances used to move a tooth has same principle. Regardless of the number of trained specialists and the popularity of fixed appliances it seems that much treatment will be carried out by general practitioner rather than specialist. Removable appliances make a valuable contribution in orthodontic service. If used in selected cases with perfection it gives good results. A removable appliance will only perform their tasks satisfactorily if they are worn continuously. For this not only the patient should be enthusiastic and co-operative but the operator also has a duty to design and construct the appliance that they can be readily tolerated by such a patient. INTRODUCTION (Cont . .)

6. Orthodontic Appliances can be Classified into : 1- Mechanical 2- functional CLASSIFICATION

7. Introduction Mechanical appliances could be : - Removable appliances - Fixed appliances CLASSIFICATION……

8. Removable appliances Active appliances Retention appliances CLASSIFICATION (Cont . .)

9. WIRE BENDING TECHNIQUE

10. WIRE BENDING TECHNIQUE

11. WIRE BENDING TECHNIQUE

12. COMPONENTS OF REMOVABLE APPLIANCES The design and construction of any removable appliance must begin with a detailed plan of the tooth movement that is to be carried out and should consider the morphologic characteristics, the age and eruption status of the patient, the psychologic findings and the treatment objectives. The removable orthodontic appliances are made up of three components: 1 . Force or active components- comprises of springs, screws or elastics. 2 . Fixation or retentive components -usually include clasps. 3. Base plate or framework -s-can be made of cold cure or heat cure acrylic.

13. UPPER HAWLEY RETAINER

14. UPPER HAWLEY RETAINER A Hawley is a simple and robust removable wire and acrylic appliance Purpose : A Hawley appliance may be used passively to retain teeth in their new position following orthodontic treatment; it also might act as an active appliance to achieve minor tooth movements. A Hawley is used for preventative, interceptive, and limited corrective orthodontics.

15. UPPER HAWLEY RETAINER

16. UPPER HAWLEY RETAINER

17. UPPER HAWLEY RETAINER

18. COMPONENTS OF UPPER HAWLEY RETAINER

19. COMPONENTS OF UPPER HAWLEY RETAINER

20. COMPONENTS OF UPPER HAWLEY RETAINER

21. COMPONENTS OF UPPER HAWLEY RETAINER

22. UPPER HAWLEY RETAINER

23. CONSTRUCTION OF LABIAL BOW UPPER HAWLEY RETAINER The labial bow/wire is comprised of the following elements: 1. The incisor segment 2. The vertical loops 3. The occlusal crossover section 4. The retentive ends.

24. CONSTRUCTION OF LABIAL BOW UPPER HAWLEY RETAINER

25. CONSTRUCTION OF LABIAL BOW (Cont..) UPPER HAWLEY RETAINER

26. CONSTRUCTION OF LABIAL BOW (Cont..) UPPER HAWLEY RETAINER

27. CONSTRUCTION OF LABIAL BOW (Cont..) UPPER HAWLEY RETAINER

28. THE ADAMS CLASP UPPER HAWLEY RETAINER

29. UPPER HAWLEY RETAINER THE ADAMS CLASP

30. Components of Adam’s Clasp 1- Arrow heads 2- Bridge 3- Retentive parts The Adams clasp should be made of 0.7 mm hard stainless steel wire for all teeth except canines for which 0.6 mm is preferred. THE ADAMS CLASP UPPER HAWLEY RETAINER

31. CONSTRUCTION OF THE ADAMS CLASP UPPER HAWLEY RETAINER

32. CONSTRUCTION OF THE ADAMS CLASP (Cont..) UPPER HAWLEY RETAINER

33. CONSTRUCTION OF THE ADAMS CLASP (Cont..) UPPER HAWLEY RETAINER

34. CONSTRUCTION OF THE ADAMS CLASP (Cont..) UPPER HAWLEY RETAINER

35. CONSTRUCTION OF THE ADAMS CLASP (Cont..) UPPER HAWLEY RETAINER

36. CONSTRUCTION OF THE ADAMS CLASP (Cont..) UPPER HAWLEY RETAINER The essential features of the Adams clasp. A, The bridge is straight. The arrowheads are parallel and the sides of the arrowheads are parallel. The bridge stands away from the tooth; the arrowheads do not touch the adjoining teeth. B, The arrowheads slope to match the contour of the gum. C, The bridge stands clear from the tooth and halfway between the tooth and the gum surface. The tags arch over the contact points. D, The tags are quite simply formed by turning down at right angles to the palate. A uniform space is left under the tags to encase them in the baseplate material.

37. COLD CURE OF SELF CURING METHODS 1. The model is prepared by removing bubbles in palatal gingival area. After sharpening all margins and making space for the arrow clasps. Paint the model with a separating medium. 2. This method is called increment method or drop and powder method. 3. All wire parts are added to cast. 4. Now add the polymer or powder resin in increments to palatal surface of cast and then monomer, start spreading it slowly. A thickness of 2 mm is acquired. PLATE CONSTRUCTION AND FINISHING UPPER HAWLEY RETAINER

38. COLD CURE OF SELF CURING METHODS ( Cont..) 5. Smoothen it with monomer and Vaseline finally. 6. Cast is placed in a closed container (or within pressure pot at 20 pound of air pressure without water). 7. After 20 minutes, dry cured cast is removed from the container. 8. Appliance is removed from the palatal surface and cleaned. 9. Trimming and Polishing done and then with denture polish kept in a cold sterilized solution until patient is available for final fitting. PLATE CONSTRUCTION AND FINISHING UPPER HAWLEY RETAINER

39. UPPER HAWLEY RETAINER

40. UPPER HAWLEY RETAINER

41. LOWER HAWLEY RETAINER

42. LOWER HAWLEY RETAINER

43. UPPER BEGG RETAINER

44. UPPER BEGG RETAINER

45. UPPER BEGG RETAINER

46. UPPER BEGG RETAINER

47. UPPER BEGG RETAINER

48. LOWER BEGG RETAINER

49. LOWER BEGG RETAINER

50. DIFFERENCES BETWEEN HAWLEY AND BEGG RETAINER HAWLEY RETAINER BEGG RETAINER It is the most popular removable appliance in use today. The retainer consists of a labial bow extending from canine to canine with retentive clasps (Adam's) on the first permanent molars. In this retainer the labial bow extends distally posterior to the last erupted molar to be imbedded in the acrylic base plate. It has good retention and is capable of preventing the anterior teeth from rotating or developing gaps. It prevents the extraction spaces from opening up and is capable of closing minorspacing in the anterior segment. It is ideal for cases where settling of occlusion is required; especially in the posterior segments, as there is no wire framework crossing the occlusion.

51. UPPER REMOVABLE APPLIANCE TO PROCLINE UPPER CENTRAL INCISORS

52. UPPER REMOVABLE APPLIANCE TO PROCLINE UPPER CENTRAL INCISORS

53. UPPER REMOVABLE APPLIANCE TO PROCLINE UPPER CENTRAL INCISORS Advantage Single or two teeth are palatally placed; can be pushed labially . Disadvantage Not suitable for posterior teeth because it is readily trapped on occlusal surfaces of teeth during insertion.

54. COMPONENTS OF UPPER REMOVABLE APPLIANCE TO PROCLINE UPPER CENTRAL INCISORS

55. UPPER REMOVABLE APPLIANCE TO PROCLINE UPPER CENTRAL INCISORS

56. UPPER REMOVABLE APPLIANCE TO PROCLINE UPPER CENTRAL INCISORS

57. UPPER REMOVABLE EXPANSION APPLIANCE

58. Correction of posterior cross-bite Elimination of a displacement Avoiding creation of a cross-bite in cases needing distal movement of upper buccal segments “V” shaped arch in a thumb-sucker UPPER REMOVABLE EXPANSION APPLIANCE Indications

59. UPPER REMOVABLE EXPANSION APPLIANCE

60. COMPONENTS OF UPPER REMOVABLE EXPANSION APPLIANCE

61. UPPER REMOVABLE EXPANSION APPLIANCE

62. T H A N K Y O U