Evaluation of the effects of surface treatments on different dental ceramic structures: Ocena vpliva obdelave površine različnih dentalnih keramik

The surface treatments applied to porcelain materials can be different overglaze methods, chemical interactions and polishing techniques. The aims of these methods are the most durable restoration and the smoothest surface. The smoothness attained with these processes is important due to the following reasons: reduction of the bacteria remaining in the pores of a surface, improvement of gingival health and esthetic view, and prevention of an abrasion of the opposite canal. The aim of this study is to assess different surface-finishing operations that are applied to widely used porcelains in prosthetic dentistry using SEM (a scanning electron microscope). In the experiments seven different surface finishing operations (sandpaper, rubber, Sof-Lex, HP paste, autoglaze, overglaze and ion exchange) were applied to four different commercial porcelains (IPS d. SIGN, Antagon, Ceramco 3, Vitadur Alpha). The effects of various surface-finishing operationson porcelain are micro-morphologically evaluated (a SEM analysis). The results showed that the smoothest surfaces were obtained with the overglaze and autoglaze, followed by HP paste, rubber, Sof-Lex and sandpaper. In addition, the smoothness values of HP paste proved that it can be safely used in clinical surface-finishing operations. Pri obdelavi površine porcelanskih materialov lahko uporabljamo različne metode: glaziranje v peči, kemijske interakcije in tehnike poliranja. Namen teh metod je največja zdržljivost, kot tudi najbolj gladka površina. Gladkost, dobljena pri teh postopkih, je pomembna zaradi naslednjih razlogov: zmanjšanje števila bakterij, ki ostajajo v porah na površini, izboljšanje zdravja obzobnega tkiva, boljši estetski videz, preprečevanje obrabe. Namen te študije je oceniti površine pri različnih postopkih obdelave porcelana, ki se uporablja v protetičnem zobozdravstvu, z metodo SEM (vrstična elektronska mikroskopija). Pri eksperimentih je bilo uporabljeno sedem različnih operacij obdelave površine (brusni papir, guma, Sof-Lex, HP-pasta, samoglaziranje, preglaziranje in izmenjava ionov) pri štirih različnih komercialnih porcelanih (IPS d. SIGN, Antagon, Ceramco 3, Vitadur Alpha). Učinek različnih operacij obdelave površine na porcelanih je bil mikro-morfološko ocenjen s SEM-analizo. Rezultati so pokazali, da je bila najbolj gladka površina dosežena s prepoliranjem in z avtoglaziranjem, nato s HP-pasto, gumo, softlexom in brusnim papirjem. Dodatno je gladkost pri uporabi HP-paste pokazala njeno varno uporabo pri klinični obdelavi površine.