The Effect Of Nano-silver Inorganic Zirconium Phosphate On Physical And Chemical Properties Of Denture Base Resin

Objective:To investigate the effects of Nano-silver base inorganic zirconium phosphate on the surface hardness,flexural strength,compressive strength,tensile strength,water absorption value and dissolution value of Removable Partial Dentures?RPDs?,and the changes of chemical structure of RPDs were aslo be tested.These findingscould provide some guidance for dental clinicians to selectmaterials to repairthe dentition defect of RPDs.Methods:The method of resin base injection molding was adopted to addnano-inorganic silver zirconium phosphate into the resin base at the concentrations of 1%,3%,5%and7%,and without additive as a control group?0%?.According to the corresponding national standards,six groups of 110 specimens with different shapes and sizes were produced.The surface hardness,flexural strength,compressive strength,tensile strength,water absorption value,dissolved value and infrared spectrum were measured according to the national standards.Those datas were analyzed by SPSS.Results:1)Surface hardness:The surface hardness in line with the increase of the concentration ratio of thenano-inorganic silver zirconium phosphate,and the maximum hardness was164.60±6.83?MPa?in 7%Group.While compared with control group,each adding group showed significantly differences?P<0.05?.However,there were no statistical significancein each additive group?P>0.05?.2)Flexural strength:Compared with control group,flexural strengthof 1%or 3%group significantly increased?P<0.05?,and the flexural strength of 3%group reached97.53±10.00?MPa?,significantly higher than 1%group,then the flexural strengthgradually decreased with the increase of concentration.3)Compressive strength:Compared with control group,3%or 5%group obviously significantly increased the compression strength?P<0.05?,and the compression strength reached 316.00±9.89?MPa?in 3%group.But in 7%group,the compression strength significantlydecreased?P<0.05?.4)Tensile strength:Compared with the control group,the tensile strength reached the maximum of 64.86±5.02?MPa?in 3%group,while significantly decreased to 62.18±3.42?MPa?in 5%group?P<0.05?.5)Water absorption value and dissolution value:There was no significant difference between control group and each addition group?P>0.05?.6)Infrared spectroscopy:3441.6cm^-1is-OH peak;2997.3cm^-1and 2953.2cm^-1were opposed to the telescopic vibration of CH;1734.4cm^-1is the C=O bond;1636.9cm^-1is C=C bond.The flexural vibration of CH₂ and CH₃ is 1450.6cm^-1;1385.5cm^-1is the flexural vibration of CH₃;1273.4cm^-1is the-COO-bond;1147.3cm^-1is the C-O bond;989.3cm^-1is the outer flexural vibration of the CH inverse plane;754cm^-1is the flexural oscillation in the CH₂ surface.In addition,there is a peak of about 550cm^-1wavelength on the infrared spectrum of each addition group,which is a phosphate group.Conclusion:1)With the addition of nano-inorganic silver-loaded zirconium phosphate to the resin base,the physical properties of each concentration group were changed,and the integrated physical properties of the 3%-addition group were the best.2)Infrared spectrum analysis showed that nano-supported silver zirconium phosphate was successfully added to PMMA.