Different techniques for caries removal
- 1. بسم الله الرحمن الرحيم
- 4. Different techniques for caries removal
- 6. INTRODUCTION For more than a century, since the creation of belt-driven handpieces, dentists have been removing caries based on the concept of drill, remove, and restore. The remaining dentin is an essential feature for long-term pulpal health. Translated, this realization clearly means that removing excess dentinal tooth structure and encroaching on the pulpal tissue directly correlate to potential negative pulpal outcomes.
- 7. The different concepts in caries removal 1-Ozone therapy 2-Air abrasion technique 3-Chemomechanical caries removal 4-Smart bur 5-Stepwise excavation 6-Use of laser in tooth preparation 7-Use of ultrasonic in tooth preparation
- 8. Ozone therapy Ozone is a gas made up of three molecules of oxygen. When it is applied to bacteria and other organisms, the Ozone completely destroys them. It is used in dentistry by utilizing a special delivery system. The portable apparatus includes a source of oxidizing gas and a dental hand piece for delivering the gas/water to the target tooth at a concentration of 2100 ppm.
- 10. A cup attached to the hand piece is provided for receiving the gas and exposing a selected area of the tooth to the gas action. The ozone gas is refreshed in this disposable cup at a rate of 615cc/minute changing the volume of gas inside the cup over 300 times every second. The cup forms a seal around the lesion being treated so that ozone cannot leak into the oral cavity.
- 12. Air abrasion technique* •The use of air abrasion techniques in dentistry allows the removal of decayed tissue without the removal of the healthy tooth substance. *Reis-schmidt T. Air abrasion cavity-preparation system provide cutting-edge option in restorative dentistery :dent prod report 1998;32(12);57-60,108-9
- 14. • The apparatus involves minute abrasive particles which are too small to be seen by the naked eye carried to the target tooth by a stream of air gently and precisely acting to remove away the decayed tooth structure • It is recommended for treatment of children, pregnant women and other medically compromised patients.
- 16. Chemomechanical caries removal Chemomechanical caries provides painless and efficient removal of carious dentin and no administration of local anaesthesia.
- 17. This techniques is based on altering the secondary and /or quaternary structure of collagen in carious dentin by chlorination of the collagen. The hydrogen bonding in the collagen is disrupted rendering it more friable and easier to remove by scrapping the carious fragments away.
- 18. Smartprep (Smart bur) The SMARTPREP Instrument is a medical grade polymer that safely and effectively remove decayed dentin, leaving healthy dentin intact. The polymer instrument is self-limiting and will not cut sound dentin unless applied with great force, and then it will only wear away, rather than cut the healthy dentin.
- 21. laser in tooth preparation Lasers are used to remove decay within a tooth and prepare the surrounding enamel for receipt of the filling. Lasers are also used to "cure" or harden a filling.
- 22. Ultrasonics in tooth preparation The use of ultrasonic tips has become an alternative for cavity preparation. However, there are concerns about this type of device, particularly with respect to intrapulpal temperatures and cavity preparation time.
- 23. Refrences Nisha Garg, Amit Garg.Textbook of Operative Dentistry. Second Edition.2013;ch.5,ch.6 Bjorndal L. in deep cavities stepwise excavation of caries can preserve the pulp.Evid based dent.2011;12(3):68.