tailieunhanh - Bleaching Techniques in Restorative Dentistry: An Illustrated Guide_2

Interest in bleaching teeth has grown exponentially in the last few years and is set to increase dramatically again in the future as new markets become available and stimulate further product development. This guide is written to help the busy restorative dentist who needs to keep up to date with the types of product available, the techniques to use them effectively and safely, and how to use them in combination with restorative dentistry in treating patients. | 7 POWER BLEACHING AND IN-OFFICE TECHNIQUES George A Freedman Gerald McLaughlin and Linda Greenwall INTRODUCTION Clinical techniques for destaining teeth can be classified into two complementary modalities in-office bleaching covered in this chapter and at-home bleaching covered in Chapter 5. Each of these techniques has certain advantages. Both can and should be used by dentists in combating dental discoloration. Some dentists and patients prefer in-office or power bleaching. A high concentration of hydrogen peroxide is administered to the teeth with an activating or promoting method . heat light or laser to expedite the whitening effect Barghi 1998 . Many variations of the technique are available but insufficient research has been earned out to verify ư it is more effective than at-home bleaching which has the advantage of requiring less total chair time and a lower patient fee. The whitening materials that are used for at-home bleaching are often of a lower concentration and therefore use of rubber dam is not involved. In-office bleaching is useful in the removal of stains throughout the arch for example age or tetracycline staining or for lightening a single tooth in an arch such as post-endodontically or perhaps even treating specific areas of a single tooth such as in some types of fluorosis . The dentist is in complete control of the process throughout treatment. This provides the advantage of being able to continue treatment or to terminate the decolouring process at any time. Inoffice bleaching is usually so rapid that visible results are observed even after a single visit. As patients become visually motivated 132 at the first appointment they tend to be more compliant for the second and third appointments that are often required to complete the in-office process. Many patients prefer bleaching by the dental professional because it requires less active participation on their part. In order to best serve their patients dentists should ideally be familiar