Morphological Changes in Coated Nd-YAG Laser Enamel

1993 IAPD/ASDC MEETING 1993/ Oc obe 15 Chicago Illinois MORPHOLOGICAL CHANGES IN COATED ND-YAG LASED ENAMEL CORPAS PASTOR, L. ELÍAS-BONETA, A. VILLALBA MORENO, J. (School o Den is y, U. Pue o Rico & U. G anada-Spain) ABSTRACT The obje i e o his pilo s udy was o: (1) E alua e wi h scanning elec on mic oscopy (s.e.m.) he enamel su ace al e a ion mic oscopic pa e ns a e lase e ching and acid e ching echnique, and (2) sugges he Nd-YAG lase powe ou pu necessa y o me ec i e enamel-b acke bonding echnique. 4 ca ies ee human p emola s we e ex a ed and s o ed in saline wá e . Enamel e ching we e pe o med by using a Nd-YAG lase (Ame ican Den al Lase ) wi h pulsed ene gy ype and a iable powe (up o 3 W.) deli e ed by op ic ibe . E e y specimen unde wen a di e en e ching p ocedu e. Samples we e inme sed in idis illed deionized wá e , insed, and spu e ed wi h a laye o gold in an “ETEC gold spu e ing BIO RAD, Mod. E 5200”, by using 18 mA. o 100 seconds. Mo phology o each specimen was e alua ed by s.e.m. The esul s show ha he highes lase doses ied (20 pps/ 1.50 Wa s), by using bo h p ime s, causes a used enamel wi h mel ing and many pi s o a iable diame e , gi ing a d illed aspec . The e a e some mic o ac u es ha seemed o be na owwe an eh ones ob ained wi h he 20pps /1.50 dosage. Highe nume o pi s ad na owe mic o ac u es appea s by using black ink as lase p ime . Hece, mo e esea ch should be sugges ed abou he clinical ele ance o mic o a u es be o e using lase on pa ien s, bu o ou pu pose, double exposi ion a 15 pps/ .75 Wa s wi h black ink as p ime will be choosen as he lase dosaje o be used in he ollowing bod s eng h es . Funded, in pa . NIH awa d. RR-03051.