Assessment of Amalgam Restoration Surface Roughness by Mechanical Electronic Instrument
; Zavod za dentalnu patologiju Stomatološkog fakulteta Sveučilišta u Zagrebu, Zagreb, Hrvatska
; Zavod za fiksnu protetiku Stomatološkog fakulteta Sveučilišta u Zagrebu, Zagreb, Hrvatska
; Laboratorij za precizna mjerenja dužina Fakultet strojarstva i brodogradnje Sveučilišta u Zagrebu, Zagreb, Hrvatska
; Zavod za dentalnu antropologiju Stomatološkog fakulteta Sveučilišta u Zagrebu, Zagreb, Hrvatska
; Zavod za dječju i preventivnu stomatologiju Stomatološkog fakulteta Sveučilišta u Zagrebu, Zagreb, Hrvatska
Sažetak Objective: The purpose of the study was to determine the differences
in smoothness degree of polished surfaces in amalgam restorations,
resulting from the use o f different types of polishing instruments.
Materials and Methods: Clinical and laboratory examinations were performed on three sample groups. Two sample groups were treated
by a similar polishing procedure, whereas the third group was additionally treated with rubbers and paste. The examination profile of
each sample was recorded in the form o f a diagram, while the midsection of the restoration surface was isometrically presented in the 2x2 mm size.Results: On the basis of the obtained measurement results analysis of the variance was made for each parameter. The values obtained of four roughness parameters on 15 samples from 5 measuring locations show that amalgam restoration surfaces vary significantly with regard to the use o f different polishing techniques and instruments. Minimum mean values (the most delicately polished surfaces) were obtained on the sample group treated with “C ” procedure. Conclusion: The examination results show that there are important differences in surface roughness with regard to different polishing techniques. On the basis of the considerable effective difference o f the polishing procedure applied on the sample group “C ” and clinical observations, it can be concluded that the optimum final polishing o f the amalgam restorations improves borderline relations between the enamel and the amalgam and increases amalgam restoration resistance.