airabrasion.pptx

airabrasion

1. Air abrasion Dr. SV.SATISH Professor & HOD Dept of Conservative Dentistry & Endodontics Navodaya Dental College

2. MINIMALLY INVASIVE DENTISTRY is the need of the hour as the conventional ‘ extension for prevention’ is being challenged and the more conservative forms of operative intervention are being recommended.

3. Procedures that aid in the removal of carious hard tissue, causing little or no damage to the adjacent sound tooth structures are fast being researched.

4. Advance in diagnosis Advance in treatment CAT scans Digital X- ray RVG Intraoral Camera Digital Photography Botox therapy Ozone therapy Stem cell therapy Laser treatment Sedation dentistry Painless anesthesia NTI-tss Device Air abrasion

5. INTRODUCTION New dental technology offer better solutions for traditional oral health problems than ever before.

6. AIR ABRASION

7. Air o v er abrasion a period dentistry of time ha s e v ol v ed f r o m a new concept o f a n al t ernati v e mean s of cavity preparation to an essential means o f p r o viding preparation a tru l y c on s e r v a ti v e fo r p r e s e r v ation o f a maximal sound tooth structure.

8. The de v e l o pment o f bon d ed r es t o r atio n s in c ombi n ation provides a truly wi t h air ab r asion de n tist r y minimal intervention dentistry.

9. Air-abrasion is a great dental advancement over the dental drill as it allows precise removal of decayed teeth without the use of a local anesthetic.

10. Air abrasive technology is the use of compressed air to propel aluminium oxide particles with such force as to be able to cut tooth structure in simple terms it is a precision sandblaster .

11. The ai r - ab r asion sys t em uses blasts of pellets of air and aluminum oxide to treat tooth problems such as cavities.

12. Principles of Ai r ab r as i on Accurate diagnosis of unsound tooth structure and decay. Accurate removal of unsound tooth structure with minimal destruction of sound tooth structure. Restorative treatment planning based on the probability of longevity of the restorative material.

13. Advantages It is painless Local anesthesia is rarely needed It works quickly and the tooth with a small lesion is ready to restore in seconds

14. advantages…. It work quietly without the whine of the all too familiar dental handpiece There is no vibration or pressure The r e is n o p r o ducti o n t o damage t h e den t al lesser soun d t oo t h structu r e of heat pulp a nd is removed.

15. CLINICAL USES Cla s s I , I I , I I I, I V , V cavity preparations Sealants and preventive restorations Repair of composite and porcelain especially margin of veneers Removal of composite and amalgam.

16. clinical uses…

17. clinical uses…

18. HOW DOES IT WORK? Air abrasion for restoration preparation removes tooth structure using a stream of aluminium oxide particles generated from compressed air or bottled carbon dioxide or nitrogen gas.

19. The abrasive particles strike the tooth with high velocity and remove small amounts of tooth structure. Efficiency of removal is relative to the hardness of the tissue or material being removed and the operating parameters of the air abrasion device.

20. Generally, air pressures range from 40 to 160 psi. The recommended levels are at 100 psi for cutting and 80 psi for surface etching.

21. The most common particle sizes are either 27 or 50 μm in diameter. The larger particles allow the clinician to work faster but will result in comparatively larger-sized cavity preparations than those with the 27 μm particles.

22. Higher particle flow rate will allow more particles to abrade the working surface faster.

23. The speed of the abrasive particles when they hit the tooth depends upon the gas pressure, nozzle diameter, particle size, and distance from the surface.

24. T ypical operat i ng dista n ces from the tooth range from 0.5 to 2 mm . a more Further di s tances pr o d uce diffuse stream that r esults in a diminished cutting ability.

25. A number of variations in tip angulations and nozzle diameters are available. Smaller nozzle diameters can be used for areas that are difficult to access. The various tip angulations allow easy placement and orientation of the handpiece thus easing the strain off the operator's hands.

26. PRECAUTIONS N ee d t o p r o t ec t p a tien t wi t h g la s se s , rubber dam if possible. Dental team needs masks and glasses. Stop frequently to check the progress. S t art wi t h l o w p r e s s u r e and l o w p o w er then increase as needed. H ol d ti p 1- 2 mm a w ay f r o m t oo t h a t a 45 degree angle then activate.

27. p r e c autions… Always keep tip moving. Requires external suction and air evacuation for the room. Use disposable mirrors. Like any air stream air abrasion can cause subcutaneous emphysema.

28. USES/APPLICATIONS? us e o f air Speci f ic in d i c ati o ns for abrasion include ; caries removal; small existing r em o v al of restorations;

29. uses….. preparation of tooth structure for cutting or etching for the placement of composites, porcelain and ceramics; and as an adjunct to the conventional handpiece bur.

30. Some of the situations where the air abrasion has particularly proved a boon include: R em o v al o f super f icial en a m e l defects

31. Air abrasion is an excellent tool for detection of pit and fissure caries – Use of burs for this procedure would remove far more sound enamel than the few micrometers removed with air abrasion.

32. In the event of the operator not locating any carious lesions, the area can easily be sealed using a pit and fissure sealant. If caries is limited to enamel, then a sealant or flowable resin-based composite can be placed.

33. If caries penetrates into dentin, then the preventive restoration can be used with a heavily filled resin in deep or wide areas subjected to forces of mastication. Sealan t ma t eria l m ay b e use d t o c o v er non-carious pits and fissures.

34. Additionally, caries detector dyes may also be used in conjunction with air abrasives to detect incipient lesion Air abrasion can also be used for pit and fissure t h e r em o v al of surface stain on enamel

35. Air abrasion used to remove & restore pit & fissure caries using 27 micron-sized powder particles. Fissure caries seen on occlusal surface of mandibular 2nd molar. Tip of air abrasion device placed on molar. Removal of caries

36. T ee t h w he r e t h e c ar i e s is r estric t ed only to a small section of the tooth B o x - p r epa r atio n s for Cla s s I I c avi t ies can also be prepared.

37. Surface preparation of abfractions and abrasions – - breaks the glaze of the highly polished surface that is not suitable for bonding and produces a highly textured surface that is excellent for the wet dentin- bonding technique.

38. R em o v al o f existing restorations – the particles of the air abrasives can be used at higher pressures for removal of old amalgam restorations

39. Air abrasion used to remove old amalgam restoration using 50 micron-sized powder particles followed by replacement with composite resins. Amalgam restoration on maxillary molar. Air abrasion device used to remove amalgam restoration. & 4)Complete removed

40. The use o f lo c al an e s t hesi a w hile working in dentin may be avoided because of their cooling action through high pressure air.

41. BEST CANDIDATES FOR PROCEDURE Ideal for use in children and others who are fearful and have minimal decay.

42. O TH E R P R OCE D URES P E R F O RMED WITH AIR ABRASION Remove some old composite restorations P r epa r e a t o o t h sur f a c e for b o nding and sealants R em o v e sup e r f icial s t ains and t oo t h discolorations