EFFECT OF HYDROFLUORIC ACID SURFACE TREATMENT CONCENTRATION ON SURFACE ROUGHNESS OF LITHIUM DISILICATE- GLASS CERAMIC

REFAEI, SANA, Dr. drg. Siti Sunarintyas, M.Kes ; prof. Dr. drg. Widowati S., M.S

2016 | Tesis | S2 Ilmu Kedokteran Gigi

Dental co-assistants have the opportunity to conduct clinical procedures such as prescribing antibiotics to treat oral infections. Antibiotics prescribing by dental co-assistants are associated with obtained knowledge from learning process. The pattern of antibiotics prescribing by dental co-assistants is directly related to patient safety. Knowledge is an excellent indicator to assess the patterns of antibiotics prescribing by medical physicians, especially dentist, therefore further assessment of rational antibiotics prescribing based on the right knowledge is necessary. This study aimed to assess knowledge level of antibiotics prescribing by dental co-assistants and the affecting factors at Rumah Sakit Gigi dan Mulut Prof. Soedomo Fakultas Kedokteran Gigi Universitas Gadjah Mada. This descriptive survey involved 102 dental co-assistants at Rumah Sakit Gigi dan Mulut Prof. Soedomo with proper inclusion and exclusion criteria. Knowledge level was measured by using questionnaire that contain 15 valid and reliable questions. Affecting factors of knowledge level were obtained through sosio-demographics data and were analyzed using correlation test to determine the relationship between affecting factors and knowledge level itself. Multinomial logistic regression test was used to analyze how vast of affecting factors to have an effect toward knowledge level significantly. The results showed that 77.5% of dental co-assistants had excellent knowledge level of antibiotics prescribing. Various factors such as gender, year of clinical clerkship, working environment, and working experience could affect the knowledge level of antibiotics prescribing by dental co-assistants. Statistical analysis of the factors such as working environment and working experience showed that working experience was found to have biggest affect (32.5%) toward knowledge level, whilst working environment factor was proven to have lessen affect on knowledge level significantly.

The dental ceramic are widely used and studied in dentistry because they are durable, aesthetically appealing and provide excellent biocompatibility.All glass-ceramic surfaces must be etched using hydrofluoric acid (HF) for increase of Surface Roughness (Ra), before cementation to tooth surface. The aim of this research was to analyze the effect of hydrofluoric acid surface treatment concentration on surface roughness of lithium disilicate glass ceramic. The materials used in this research was lithium disilicate glass ceramic IPS e.max Press HT (Ivoclar-Vivadent, Schaan,Liechtenstein, Germany). and hydrofluoric acid solution (ACS, ISO,Reag. Europe). A total of fifteen discs of lithium disilicate glass ceramic were prepared (10 mm in diameter and 1 mm in thickness). All specimens were polished and cleaned in distilled water. Specimens were divided into 3 groups (n=5). Group A (control) was no treatment, group B was etched by 5% HF for 2 min, and group C was etched by 9.5% HF for 2 min. etched surface were observed bySEM (Scanning electron microscope). measurement of surface roughness of lithium disilicate glass ceramic was determined with surface roughness tester machine Ra (micrometer).The results was analyzed with one-way ANOVA and Post Hoc Tests. The results showed that the mean surface roughness values Ra (micrometer) were group A( control) = (0.0962+-0.00894)um;group B=(0.6080+-0.05404) um and group C=(0.8920+-0.10062)um.The one -way ANOVA showed there was effect of hydrofluoric acid surface teratment concentration on surface ruoghness of lithium dislicate glass ceramic . The post Hos test showld there was a differnce of Ra (um) between experimental study groups (p<0.05). In conclusion, concentration of hydrofluoric acid influenced surface roughness (Ra) of lithium disilicate glass ceramic

Kata Kunci : asam hidrofluorida, aplikasi permukaan, Konsentrasi, kekasaran permukaan, Lithium disilikat keramikkaca,Hydrofluoric acid, Surface treatment, Concentration, Surface roughness, Lithium disilicate glass ceramic