Objective To report effect on treatment tibial fracture asynthesis by external fixator combined with spongy bone implant.Methods From Februryl 999 to February 2002,11 cases of the tibial fractures asynthesis were treated with the external fixator combined with spongy bone implant.Results Follow-up was both clinically and ra-diologically performed in 1 leases.The healing rate of the fracture was 100% in this group.The average healing time was 3.2 months.Conclusion The external fixation combined with spongy bone implant is simple and effective in treatment of the tibial fracture asynthesis.

OBJECTIVETo investigate the polymorphic distribution of short tandem repeat (STR) sequences D21S1433, D21S1442, D21S1444, D21S2051 in Guangdong Han nationality in China.

METHODSUsing quantitative fluorescens PCR technology, the authors analyzed 200 unrelated samples to acknowledge the allele frequency, heterozygosity and other genetic information.

RESULTSD21S1433, D21S1442, D21S1444, D21S2051 were tested in 200 samples, which were tested to be statistical according to Hardy-Weinberg equilibrium (P> 0.05), 9, 10, 9 and 5 alleles were detected separately in each STRs. The heterozygosity of each STR was 0.818, 0.820, 0.770, and 0.261. The polymorphic information content > 0.7 in D21S1433, D21S1442, D21S1444, while D21S2051 owned only 0.247 polymorphic information.

CONCLUSIOND21S1433, D21S1442, D21S1444 are found to have high heterozygosity and polymorphic information content, and they could provide useful markers for genetic purposes, while D21S2051 is not informative in Guangdong Han nationality in China.

Alleles ; Asian Continental Ancestry Group ; genetics ; China ; Female ; Gene Frequency ; Genetics, Population ; Heterozygote ; Humans ; Polymerase Chain Reaction ; methods ; Polymorphism, Genetic ; Pregnancy ; Tandem Repeat Sequences ; genetics