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Comparative study between laser and conventional techniques for class V cavity preparation in gamma-irradiated teeth (in vitro study).
Rasmy, Amr H M; Harhash, Tarek A; Ghali, Rami M S; El Maghraby, Eman M F; El Rouby, Dalia H.
Afiliação
  • Rasmy AHM; Egyptian Atomic Energy Authority, National Centre for Radiation Research and Technology (NCRRT), Health Radiation Research Department, Cairo, Egypt.
  • Harhash TA; Cairo University, National Institution of Laser Enhanced Sciences, Medical Laser Applications Department, Cairo, Egypt.
  • Ghali RMS; Aachen University, Aachen Dental Laser Center, Aachen, Germany; Ain Shams University, Cairo, Egypt.
  • El Maghraby EMF; Egyptian Atomic Energy Authority, National Centre for Radiation Research and Technology (NCRRT), Health Radiation Research Department, Cairo, Egypt.
  • El Rouby DH; Cairo University, Faculty of Oral & Dental Medicine, Oral Pathology Department, Cairo, Egypt.
J Appl Oral Sci ; 25(6): 657-665, 2017.
Article em En | MEDLINE | ID: mdl-29211287
OBJECTIVE: The purpose of this study was to compare laser with conventional techniques in class V cavity preparation in gamma-irradiated teeth. METHODS: Forty extracted human teeth with no carious lesions were used for this study and were divided into two main groups: Group I (n = 20) was not subjected to gamma radiation (control) and Group II (n=20) was subjected to gamma radiation of 60 Gray. Standard class V preparation was performed in buccal and lingual sides of each tooth in both groups. Buccal surfaces were prepared by the Er,Cr:YSGG laser (Waterlase iPlus) 2780 nm, using the gold handpiece with MZ10 Tip in non-contact and the "H" mode, following parameters of cavity preparation - power 6 W, frequency 50 Hz, 90% water and 70% air, then shifting to surface treatment laser parameters - power 4.5 W, frequency 50 Hz, 80% water and 50% air. Lingual surfaces were prepared by the conventional high-speed turbine using round diamond bur. Teeth were then sectioned mesio-distally, resulting in 80 specimens: 40 of which were buccal laser-treated (20 control and 20 gamma-irradiated specimens) and 40 were lingual conventional high-speed bur specimens (20 control and 20 gamma-irradiated specimens). RESULTS: Microleakage analysis revealed higher scores in both gamma groups compared with control groups. Chi-square test revealed no significant difference between both control groups and gamma groups (p=1, 0.819, respectively). A significant difference was revealed between all 4 groups (p=0.00018). CONCLUSION: Both laser and conventional high-speed turbine bur show good bond strength in control (non-gamma) group, while microleakage is evident in gamma group, indicating that gamma radiation had a dramatic negative effect on the bond strength in both laser and bur-treated teeth.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Cárie Dentária / Preparo da Cavidade Dentária / Infiltração Dentária / Raios gama Limite: Humans Idioma: En Revista: J Appl Oral Sci Assunto da revista: ODONTOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Egito País de publicação: Brasil
Texto completo
Adicionar na Minha BVS
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XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Cárie Dentária / Preparo da Cavidade Dentária / Infiltração Dentária / Raios gama Limite: Humans Idioma: En Revista: J Appl Oral Sci Assunto da revista: ODONTOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Egito País de publicação: Brasil