儿童少年掌指骨干骺融合进程的城乡对比研究

The comparative observation on fusion of epiphysis of metacarpal-phalangeal bone in children between urban and rural areas

目的 探讨群体儿童掌指骨发育期间干骺融合进程是否存在城乡差异。 方法 在哈尔滨市和黑龙江省海伦县长发乡等选择 10～ 18岁健康中小学生 ,基本整周岁 ,每个性别年龄组 35人 ,共 12 6 0人。被检者均拍左手腕部X线片 ,按 5等级判定掌指骨干骺融合水平 ;拍片同时调查性发育状况。 结果 城男 14岁、乡男 15岁 ,城女 12岁、乡女 13岁可见极少数被检者全部掌指骨干骺融合 ;观察对象半数融合所在年龄为城男 15～ 16岁、乡男 16～ 17岁、城女 13～ 14岁 ,乡女 14～ 15岁 ;城男 17岁、乡男 18岁以上、城女 16岁、乡女 17岁全部观察对象各掌指骨完全干骺融合。性发育同骨发育有密切时间联系。 结论 男女儿童的掌指骨干骺融合进程存在城乡差异 ,城市比乡村领先大约 1年。

Objective To determine the differences of the fusion progresses of the epiphysis of the metacarpal-phalangeal bone in children between urban and rural areas. Methods A total of 1 260 healthy children,aged 10～18 years old,from Harbin and Chang Fa countryside,Hailun county,Heilongjiang province,were radiographed on the left hand and wrist.There are 35 samples in each gender-age group.Their skeletal maturity was estimated and their sexual development was surveyed.The degrees of the fusion of the epiphysis of the metacarpal-phalangeal bone were measured by five stages.Results It is obvious that the samples of the fusion of epiphysis of all metacarpal-phalangeal bone were rare in 14 years old male group and 12 years old female group in urban area,in 15 years old male group and 13 years old female group in rural area.The ages of 50 percent fusion of the epiphysis are 15～16,13～14 years old in urban male and female respectively,16～17 and 14～15 years old in rural male and female respectively.When the samples are over 17 years old in male and 16 years old in female in urban areas,18 years old in male and 17 years old in female in rural area,the epiphysis fused completely.There are close relationship between sexual maturity and skeletal maturation in timing. Conclusions The differences in the fusion progresses of the epiphysis of metacarpal-phalangeal bone between urban and rural was existed.The results showed that the maturity of metacarpal-phalangeal bone in urban area advanced one year than those in rural area.