ABSTRACT
Objective To analyze the genetic phenotypes of Nantong Han population and evaluate the application value of 17 Y-STR loci in Nantong population.Methods The peripheral blood samples were collected from 343 unrelated Nantong Han males and the genomic DNA were extracted by Chelex-100 method.Genotyping was performed using the AmpF(l)STR YfilerTM Kit.The results were compared with other 12 Han populations,including Anhui,Jiangsu,Jiangxi,Shandong,Shanghai,Zhejiang (1),Lanzhou,Nanyang,Luzhou,Mudanjiang,Shanxi and Zhejiang (2),and 9 minority populations (Mongol,Xibe,Tibetan in Lhasa,Tibetan in Qinghai,Kazak,Uighur,Manchu,Paiwan in Taiwan and Tujia).Results A total of 327 different haplotypes were found in 17 Y-STR loci in Nantong Han population.The haplotype diversity (HD) was 0.999 7.The R,value between Nantong Han and other Chinese populations ranged from-0.000 6 to 0.263 5.The multidimensional scaling results showed that Nantong Han population had no significant differences between most of the Han populations,but had significant differences between most of Chinese minority populations.Conclusion Seventeen Y-STR loci can be a powerful tool for forensic application because of its high polymorphism in Nantong Han population.
ABSTRACT
BACKGROUND: With the increasing aesthetic pursuit of patients, an aesthetic abutment with certain strength has aroused people's attentions either in the anterior or posterior tooth repair. OBJECTIVE: To evaluate the effects of titanium abutment and zirconia abutment on peri-implant tissue in anterior teeth.METHODS: A total of 40 anterior teeth from 34 patients were selected and received single crown restoration with Ankylos implants. Among them, titanium abutments were used in 20 teeth, and zirconia abutments in the other 20 teeth. All the patients were re-visited at 12 months after crown restoration. Peri-implant marginal bone resorption length (MBL), periodontal probing depth (PD), modified plaque index (mPLI), modified sulcus bleeding index (mSBI), and papilla index (PP) were detected; patient satisfaction investigation was carried out; and aesthetic assessment was done based on the pink esthetic score (PES).RESULTS AND CONCLUSION: There were no differences between two groups in MBL, PD, mPLI, mSBI, PP. Patients in both groups were satisfied with the treatment outcomes with insignificant difference (P > 0.05). The PES value in the zirconia abutment group was significantly higher than that in the titanium abutment group (P < 0.05). Overall, titanium and zirconia abutments show the similar effects on the peri-implant tissues and both can achieve good clinical outcomes. However, zirconia abutments have certain advantages in the aesthetic restoration for anterior teeth, and further investigation on long-term effects is warranted.
ABSTRACT
BACKGROUND: With the increasing aesthetic pursuit of patients, an aesthetic abutment with certain strength has aroused people's attentions either in the anterior or posterior tooth repair. OBJECTIVE: To evaluate the effects of titanium abutment and zirconia abutment on peri-implant tissue in anterior teeth.METHODS: A total of 40 anterior teeth from 34 patients were selected and received single crown restoration with Ankylos implants. Among them, titanium abutments were used in 20 teeth, and zirconia abutments in the other 20 teeth. All the patients were re-visited at 12 months after crown restoration. Peri-implant marginal bone resorption length (MBL), periodontal probing depth (PD), modified plaque index (mPLI), modified sulcus bleeding index (mSBI), and papilla index (PP) were detected; patient satisfaction investigation was carried out; and aesthetic assessment was done based on the pink esthetic score (PES).RESULTS AND CONCLUSION: There were no differences between two groups in MBL, PD, mPLI, mSBI, PP. Patients in both groups were satisfied with the treatment outcomes with insignificant difference (P > 0.05). The PES value in the zirconia abutment group was significantly higher than that in the titanium abutment group (P < 0.05). Overall, titanium and zirconia abutments show the similar effects on the peri-implant tissues and both can achieve good clinical outcomes. However, zirconia abutments have certain advantages in the aesthetic restoration for anterior teeth, and further investigation on long-term effects is warranted.