Evaluation of surface treatments by self glaze, over glaze and a polishing agent on the porcelain surface modified with diamond rotary instrument-an in vitro study

B. Krishnaveni; Priyalatha Suvvati; Samarla Aruna Kumari; K. Sravanthi; Pavani Lukka; Jahanara Jahanara

doi:10.53730/ijhs.v6nS3.6493

Authors

B. Krishnaveni Senior lecturer, Department of prosthodontics, Mamata dental college and hospital, Khammam, Telangana
Priyalatha Suvvati
viksh9900@gmail.com
Assistant professor, Department of prosthodontics, Government dental college and hospital, Afzulgunj, Hyderabad, Telangana
Samarla Aruna Kumari Assistant professor, Department of prosthodontics, Government dental college and hospital, Vijayawada, Andhra Pradesh
K. Sravanthi Prosthodontist, Deepika dental clinic, Balapur, Hyderabad, Telangana
Pavani Lukka Resident doctor, ESIC medical College, Sanathnagar, Hyderabad, Telangana
Jahanara Prosthodontist, Ashwini dental clinic, Hasthinapuram, Hyderabad, Telangana

Keywords:

surface roughness, self glaze, over glaze

Abstract

The purpose of this study is to evaluate effect of a) Self glaze b) Over glaze and c) Polishing on porcelain surface which is subjected to grinding with a diamond rotary instrument. To test this theory 40 ceramic fused to metal disc samples were fabricated. The ceramic material used was Ivoclar Dsign. The discs were of 10mm X 3mm of which 2mm is metal substructure and 1mm is of porcelain. The specimens were divided into four groups of 10 samples each. The first group was left as fired or unglazed. The remaining three groups were subjected to surface modification with sintered diamond bur at 15000 rpm per minute with even pressure. Each of the three groups was treated with diamond polishing paste, self glaze and overglaze respectively. The surface of all the four groups were evaluated under optical microscope and scanning electron microscope. Optical microscope observation revealed that Group-I (as fired) had the surface of the specimens appearing to be pitted, rough with irregularities and there was no evidence of surface cracks. Group II (polished with diamond bur) had surface appeared to be very smooth.

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