Haavikko法推斷南京地區(qū)兒童牙齡的應(yīng)用初探
發(fā)布時(shí)間：2019-04-19 14:23
【摘要】：在兒童口腔科的臨床工作中,判斷牙胚的發(fā)育程度對(duì)治療計(jì)劃的制定十分重要。本研究在應(yīng)用Haavikko法系統(tǒng)的基礎(chǔ)上,利用全口牙位曲面體層X(jué)線片進(jìn)行南京地區(qū)兒童牙齡的推斷。本研究包括了三個(gè)部分的內(nèi)容,分別為正常兒童樣本的研究、先天缺牙兒童樣本的研究以及乳牙根尖周炎兒童樣本的研究。 研究目的 評(píng)估Haavikko法測(cè)定南京地區(qū)兒童自然年齡的適用性,研究牙齡與自然年齡的關(guān)系,為該方法在我國(guó)兒童牙齡估算中的應(yīng)用提供參考；探究先天缺牙對(duì)患兒存留牙發(fā)育速度的影響和缺牙個(gè)數(shù)與存留牙發(fā)育程度的關(guān)系；研究乳牙根尖周炎與本地兒童恒牙胚發(fā)育速度的關(guān)系和炎癥侵及范圍對(duì)恒牙胚發(fā)育速度的影響。 材料和方法 本研究收集了符合要求的南京市正常兒童全口牙位曲面體層X(jué)線片629張(其中男童392例,女童237例),先天缺牙兒童140張(其中男童77例,女童63例),乳牙根尖周炎兒童167張(其中男童105例,女童62例)按照Haavikko法對(duì)左下頜7顆恒牙發(fā)育分期進(jìn)行判讀,查表計(jì)算得出牙齡,將所得牙齡與自然年齡進(jìn)行配對(duì)t檢驗(yàn),并建立南京地區(qū)兒童牙齡與自然年齡間關(guān)系的數(shù)學(xué)模型；利用實(shí)驗(yàn)得出的適用于本地兒童的公式計(jì)算出牙齡,將先天缺牙患兒和正常對(duì)照組兒童的牙齡和年齡的差值做配對(duì)t檢驗(yàn),并將差值作Spearman秩相關(guān)檢驗(yàn)；將乳牙根尖周炎患兒和正常對(duì)照組兒童的牙齡和年齡差值做配對(duì)t檢驗(yàn),按炎癥侵及的范圍分組重復(fù)上述實(shí)驗(yàn)。 結(jié)果 運(yùn)用Haavikko法算得南京地區(qū)男童牙齡比自然年齡平均低估0.6年,女童牙齡比自然年齡平均低估1.0年,該差異有統(tǒng)計(jì)學(xué)意義(P0.05)。建立南京地區(qū)兒童牙齡與自然年齡相關(guān)的數(shù)學(xué)模型,得到自然年齡與牙齡的擬合曲線方程。 先天缺牙兒童存留牙發(fā)育平均落后正常兒童0.44年,差異有統(tǒng)計(jì)學(xué)意義(P0.05),少數(shù)牙先天缺失患兒存留牙發(fā)育平均滯后0.41年,多數(shù)牙先天缺失患兒存留牙發(fā)育平均滯后0.92年。缺牙數(shù)與先天缺牙組牙齡減自然年齡值相關(guān)系數(shù)為-0.220,顯著相關(guān)。 乳牙根尖周炎兒童牙齡與正常對(duì)照組差異無(wú)統(tǒng)計(jì)學(xué)意義,受炎癥累及的繼承恒牙胚牙齡與正常對(duì)照組間的差異有統(tǒng)計(jì)學(xué)意義,發(fā)育程度平均滯后0.59年。炎癥侵及繼承恒牙胚牙囊者,牙齡較正常對(duì)照組延遲0.58年。 結(jié)論 基于Haavikko法研究并建立了南京市兒童的牙齡與自然年齡間關(guān)系的數(shù)學(xué)模型,經(jīng)驗(yàn)證所求的年齡與自然年齡間無(wú)統(tǒng)計(jì)學(xué)差異,其結(jié)果可用于對(duì)本地兒童牙齡及自然年齡的計(jì)算。 先天缺牙患兒存留牙發(fā)育較正常兒童遲緩,缺牙數(shù)與存留牙發(fā)育遲緩程度呈顯著正相關(guān)。 乳牙根尖周炎會(huì)造成其繼承恒牙胚發(fā)育延遲,平均延遲0.59年。
[Abstract]:In the clinical work of pediatric stomatology, it is very important to judge the degree of tooth germ development to make the treatment plan. In this study, based on the Haavikko method, the dental age of children in Nanjing area was estimated by using the whole tooth position surface X-ray film. This study includes three parts: normal children samples, congenital tooth deficiency children samples and deciduous teeth periapical children samples. Objective to evaluate the applicability of Haavikko method in determining the natural age of children in Nanjing and to study the relationship between dental age and natural age in order to provide a reference for the application of this method in the estimation of children's dental age in China. To investigate the effect of congenital tooth deficiency on the development rate of retained teeth and the relationship between the number of teeth missing and the degree of development of retained teeth. To study the relationship between periapical periodontitis of deciduous teeth and the development rate of permanent tooth germ in local children and the effect of the extent of inflammation on the development rate of permanent tooth germ. Materials and methods A total of 629 X-ray films (392 boys, 237 girls) and 140 congenital tooth defects (77 boys and 63 girls) were collected from normal children in Nanjing. Children with periapical periodontitis of deciduous teeth, including 105 boys and 62 girls, were divided into 7 permanent teeth of left mandible according to Haavikko's method. The age of teeth was calculated, and the age of teeth was matched with natural age by t-test. The mathematical model of the relationship between dental age and natural age of children in Nanjing area was established. The age of teeth was calculated by the formula suitable for local children. The difference of tooth age and age between children with congenital tooth deficiency and normal children was tested by paired t-test, and the difference was tested by Spearman rank correlation test. The age and age difference between children with periapical periodontitis of deciduous teeth and normal controls were tested by paired t-test and repeated according to the extent of inflammatory invasion. Results the average age of teeth in Nanjing area was 0.6 years lower than that of natural age, and that of girls was 1.0 years. The difference was statistically significant (P0.05). Results Haavikko method was used to calculate the average age of teeth in Nanjing area was 0.6 years lower than that of natural age (P0.05). A mathematical model of the relationship between natural age and dental age of children in Nanjing area was established, and the fitting curve equation of natural age and dental age was obtained. The average development of retained teeth in children with congenital tooth deficiency was 0.44 years, the difference was statistically significant (P0.05). The development of retained teeth in a small number of children with congenital absence of teeth was 0.41 years behind, on average, there was a significant difference between the two groups. The development of remaining teeth in most children with congenital loss of teeth was 0.92 years. The correlation coefficient between the number of teeth missing and the natural age of congenital tooth deficiency group was-0.220, which was significantly correlated with that of the congenital tooth deficiency group. There was no significant difference in tooth age between children with periapical periodontitis of deciduous teeth and normal control group, but there was significant difference between the age of inherited permanent tooth germ affected by inflammation and that of normal control group, and the average development degree was 0.59 years behind. The age of the tooth was delayed 0.58 years in the patients with inflammatory invasion of the permanent tooth sac as compared with that in the normal control group. Conclusion A mathematical model of the relationship between dental age and natural age of children in Nanjing was established based on Haavikko method, and there was no statistical difference between the age and natural age. The results can be used to calculate the dental age and natural age of local children. The development of retained teeth in children with congenital tooth deficiency was slower than that in normal children, and there was a significant positive correlation between the number of teeth missing and the degree of remaining tooth growth retardation. Periapical periodontitis of deciduous teeth causes delayed development of inherited permanent tooth germ, with an average delay of 0.59 years.
【學(xué)位授予單位】：南京醫(yī)科大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：R788
本文編號(hào)：2461024
[Abstract]:In the clinical work of pediatric stomatology, it is very important to judge the degree of tooth germ development to make the treatment plan. In this study, based on the Haavikko method, the dental age of children in Nanjing area was estimated by using the whole tooth position surface X-ray film. This study includes three parts: normal children samples, congenital tooth deficiency children samples and deciduous teeth periapical children samples. Objective to evaluate the applicability of Haavikko method in determining the natural age of children in Nanjing and to study the relationship between dental age and natural age in order to provide a reference for the application of this method in the estimation of children's dental age in China. To investigate the effect of congenital tooth deficiency on the development rate of retained teeth and the relationship between the number of teeth missing and the degree of development of retained teeth. To study the relationship between periapical periodontitis of deciduous teeth and the development rate of permanent tooth germ in local children and the effect of the extent of inflammation on the development rate of permanent tooth germ. Materials and methods A total of 629 X-ray films (392 boys, 237 girls) and 140 congenital tooth defects (77 boys and 63 girls) were collected from normal children in Nanjing. Children with periapical periodontitis of deciduous teeth, including 105 boys and 62 girls, were divided into 7 permanent teeth of left mandible according to Haavikko's method. The age of teeth was calculated, and the age of teeth was matched with natural age by t-test. The mathematical model of the relationship between dental age and natural age of children in Nanjing area was established. The age of teeth was calculated by the formula suitable for local children. The difference of tooth age and age between children with congenital tooth deficiency and normal children was tested by paired t-test, and the difference was tested by Spearman rank correlation test. The age and age difference between children with periapical periodontitis of deciduous teeth and normal controls were tested by paired t-test and repeated according to the extent of inflammatory invasion. Results the average age of teeth in Nanjing area was 0.6 years lower than that of natural age, and that of girls was 1.0 years. The difference was statistically significant (P0.05). Results Haavikko method was used to calculate the average age of teeth in Nanjing area was 0.6 years lower than that of natural age (P0.05). A mathematical model of the relationship between natural age and dental age of children in Nanjing area was established, and the fitting curve equation of natural age and dental age was obtained. The average development of retained teeth in children with congenital tooth deficiency was 0.44 years, the difference was statistically significant (P0.05). The development of retained teeth in a small number of children with congenital absence of teeth was 0.41 years behind, on average, there was a significant difference between the two groups. The development of remaining teeth in most children with congenital loss of teeth was 0.92 years. The correlation coefficient between the number of teeth missing and the natural age of congenital tooth deficiency group was-0.220, which was significantly correlated with that of the congenital tooth deficiency group. There was no significant difference in tooth age between children with periapical periodontitis of deciduous teeth and normal control group, but there was significant difference between the age of inherited permanent tooth germ affected by inflammation and that of normal control group, and the average development degree was 0.59 years behind. The age of the tooth was delayed 0.58 years in the patients with inflammatory invasion of the permanent tooth sac as compared with that in the normal control group. Conclusion A mathematical model of the relationship between dental age and natural age of children in Nanjing was established based on Haavikko method, and there was no statistical difference between the age and natural age. The results can be used to calculate the dental age and natural age of local children. The development of retained teeth in children with congenital tooth deficiency was slower than that in normal children, and there was a significant positive correlation between the number of teeth missing and the degree of remaining tooth growth retardation. Periapical periodontitis of deciduous teeth causes delayed development of inherited permanent tooth germ, with an average delay of 0.59 years.
【學(xué)位授予單位】：南京醫(yī)科大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：R788
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