Clinical Study On The Stability Of Large-particle Sandblasted And Acid-etched Surface Implants With Ultraviolet Photofunctionalization

Purpose:Study the Ultraviolet(UV)Photofunctionalization impacts on the osseointegration with the large-particle sandblasted and acid-etched(SLA)surface implants;apply the resonance frequency analysis method to analyze the changing of the Implant Stability Quotient(ISQ)of the osseointegration with SLA implants after the Ultraviolet Photofunctionalization.Methods:32 implantation cases were selected,these patients had individual tooth loss in mandibular posterior teeth and visited Shangxi Medical University Department of Stomatology during June-Dec.2016.There were 50 SLA surface implants in total,24 of them were UV–treated and 26 were untreated control group.OsstellTM ISQ resonance frequency analyzer was used to compare the stability of the implants right after the surgery,and in 2 weeks,4 weeks,6 weeks,8 weeks and 12 weeks.The ISQ values of the buccal,lingual,proximal and distal of each implant were measured and averaged.Statistical analysis was performed using SPSS18.0 software.Results:50 implants achieved good initial stability during implantation and the survival rate of the implants after 12 weeks was 100%.For the 24 UV–treated implants,the average ISQwas 68.25±3.09 immediately after the implantation surgery and dropped to the lowest value 2 weeks later,then gradually increased.For the control group,the average ISQ was68.88±3.66 immediately after the implantation surgery;it gradually decreased and dropped to the lowest 4 weeks later,then gradually increased.There was no statistically significant difference between the ISQ values of the two groups immediately after the implantation surgery(p>0.05).Furthermore,there was statistically significant difference between the two groups of ISQ values 2 weeks,4 weeks,6 weeks,8 weeks and 12 weeks after the surgery(p<0.05).Conclusions:UV Photofunctionalization can restore the bioactivity of the large-particle sandblasted and acid-etched surface implants.It can speed up the bone-to-implant contact and shorten the heal time.The implants can reflects the higher clinical stability and it has significant clinical meaning.