Today's Veterinary Practice provides comprehensive information to keep every small animal practitioner up to date on companion animal medicine and surgery as well as practice building and management.
Issue link: http://todaysveterinarypractice.epubxp.com/i/38074
PRACTICE STEP BY STEP | ACID ETCHING This step is performed with a 37% phosphoric acid. The purpose is to remove all impurities from the tooth surface and slightly demineralize the surface. This will lead to increased surface area for bonding.2 1 Place the supplied acid on the tooth surface and let sit for 10 to 30 seconds. 2 BONDING AGENT Bonding agents are avaliable in many different formulations that offer the ability to do the procedure in a 1- or 2-step process. The 1-step options combine the primer and bonding agent in 1 bottle (eg, ONE-STEP, bisco.com). The 2-step products utilize separate primer and bonding agents (eg, Scotchbond Multi-Purpose, 3M.com). A B C After the prescribed time, rinse the tooth surface thoroughly for 20 seconds. Insuf- ficient rinsing will leave residual acid in the dentinal tubules and result in sensitivity. 3 Dry the area lightly. Do not desiccate, as this may weaken bond strength. 1 The bonding agent should be applied in a very thin layer (A). After 10 seconds, it is air thinned/dried for 15 seconds (B). Finally, it is light cured with an intense blue light for 10 seconds (C). To prevent eye/lens damage, view the light through an appropriate filter. A B CONTINUING EDUCATION 7hiliÊ ÌhiÃÊ >ÀÌiVliÊ m>kiÃÊ ÌhiÊ «ÀoVi`ÕÀiÊ lookÊ Ãim«li]Ê im«Ào«iÀÊ ÌiVhniµÕiÊ V>nÊ `iÃÌÀoÞÊ ÌhiÊ ÌiiÌhÊ ÞoÕÊ >ÀiÊ ÌÀÞin}Ê ÌoÊ Ài«>iÀ°Ê /hiÀiÊ >ÀiÊ nuances that cannot be learned ÜiÌhoÕÌÊ h>n`Ã-onÊ ÌÀ>inin}°Ê This training is available in 2 If a 1-step bonding agent is used, a layer of unfilled resin (eg, Fortify, bisco.com) should be applied to the bonding agent to add strength and smoothness to the restoration (A). The resin is placed over the 1-step bonding agent and light cured for 10 seconds (B). References 1. Holmstrolm S, Frost P, Eisner E. Restorative dentistry. Veterinary Dental Techniques, 2nd ed. Philadelphia: WB Saunders, 1998, pp 255-318. 2. Woodward TM. Bonded sealants for fractured teeth. Top Companion Anim Med 2008; 23(2):91- 96, 2008. ->nÊ ii}oÊvetdentaltraining. com®]Ê ->nÌ>Ê >ÀL>À>Ê sbvdtc. com®]Ê >n`Ê oloÀ>`oÊ -«Àin}ÃÊ vetdentalclasses.com®° nÊ>``iÌion]Êkii«ÊinÊ min`Ê that these are generalized direc- ÌionðÊ*li>ÃiÊÀiviÀÊÌoÊÌhiÊm>nÕ- facturer’s instructions for the ëiViviVÊ«Ào`ÕVÌÊÞoÕÊÕÃi°Ê July/August 2011 Today’s Veterinary Practice 45 Bonded Sealant Application for Crown Fractures