이 논문의 목적은 골 성숙도와 치아의 성숙도를 골격적 부정교합에 따라 관련성을 알아보는 것이다. 6세에서 14세에 이르는 총 192명의 환자(89명의 남자, 103명의 여자)를 대상으로 하였으며 측모 두부 방사선 사진, 파노라마 방사선 사진, 수완부 방사선 사진을 사용하였고 심한 질환을 가진 경우는 제외하였다. 통계는 이분법, chi-square, logistic regression analysis, independent t-test를 사용하여 분석하였다. 견치, 제1대구치, 제2대구치의 석회화는 골 성숙도와 연관성(p < 0.05)을 보였고 또한 골 성숙도가 높은 경우, 여자어린이 일 경우가 11.43배 높았다(p < 0.001). class II 부정교합일 경우, 견치, 제1소구치, 제1대구치, 제2대구치의 치아 석회화 정도가 class III 부정교합자에 비해 높았다(p < 0.05). 치아의 석회화와 골 성숙도의 연관성은 높았으며 class II와 class III 부정교합환자의 치아의 성숙도는 치아에 따라 다른 성숙도를 보였다.
이 논문의 목적은 골 성숙도와 치아의 성숙도를 골격적 부정교합에 따라 관련성을 알아보는 것이다. 6세에서 14세에 이르는 총 192명의 환자(89명의 남자, 103명의 여자)를 대상으로 하였으며 측모 두부 방사선 사진, 파노라마 방사선 사진, 수완부 방사선 사진을 사용하였고 심한 질환을 가진 경우는 제외하였다. 통계는 이분법, chi-square, logistic regression analysis, independent t-test를 사용하여 분석하였다. 견치, 제1대구치, 제2대구치의 석회화는 골 성숙도와 연관성(p < 0.05)을 보였고 또한 골 성숙도가 높은 경우, 여자어린이 일 경우가 11.43배 높았다(p < 0.001). class II 부정교합일 경우, 견치, 제1소구치, 제1대구치, 제2대구치의 치아 석회화 정도가 class III 부정교합자에 비해 높았다(p < 0.05). 치아의 석회화와 골 성숙도의 연관성은 높았으며 class II와 class III 부정교합환자의 치아의 성숙도는 치아에 따라 다른 성숙도를 보였다.
The purpose of this study was to compare skeletal maturity index and dental developmental stages based on skeletal malocclusion. A total of 192 patients (89 male and 103 female) between 6 to 14 years old were selected for this study and underwent cephalograms, panorama radiographs, and hand-wrist ra...
The purpose of this study was to compare skeletal maturity index and dental developmental stages based on skeletal malocclusion. A total of 192 patients (89 male and 103 female) between 6 to 14 years old were selected for this study and underwent cephalograms, panorama radiographs, and hand-wrist radiographs. Any syndromic cases were excluded. Selected clinical parameters were dichotomised for statistical analysis. Chi-square, logistic regression analysis, and independent t-tests were used for the statistical evaluation. Canine, first molar, and second molar calcification were significantly associated with skeletal maturity in the logistic regression model (p < 0.05). In addition, patients who had higher skeletal maturity index were 11.43 times more likely to be female than those who had lower skeletal maturity index (p < 0.001). The patients with skeletal class II malocclusion displayed significantly higher dental developmental stage in canines, first premolars, first molars, and second molars than the patients with class III malocclusion (p < 0.05). The dental developmental stage of the patients was significantly associated with skeletal maturity. In addition, there was a significant difference between class II and class III malocclusion with some types of tooth calcification.
The purpose of this study was to compare skeletal maturity index and dental developmental stages based on skeletal malocclusion. A total of 192 patients (89 male and 103 female) between 6 to 14 years old were selected for this study and underwent cephalograms, panorama radiographs, and hand-wrist radiographs. Any syndromic cases were excluded. Selected clinical parameters were dichotomised for statistical analysis. Chi-square, logistic regression analysis, and independent t-tests were used for the statistical evaluation. Canine, first molar, and second molar calcification were significantly associated with skeletal maturity in the logistic regression model (p < 0.05). In addition, patients who had higher skeletal maturity index were 11.43 times more likely to be female than those who had lower skeletal maturity index (p < 0.001). The patients with skeletal class II malocclusion displayed significantly higher dental developmental stage in canines, first premolars, first molars, and second molars than the patients with class III malocclusion (p < 0.05). The dental developmental stage of the patients was significantly associated with skeletal maturity. In addition, there was a significant difference between class II and class III malocclusion with some types of tooth calcification.
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문제 정의
Many studies about comparing and analyzing the relationship between skeletal maturity index and dental developmental stage have been introduced, but this paper will probably be the one of the first research with Korean children and so will provide a significant information to other paediatric dentists. The purpose of this study was to compare skeletal maturity index and dental developmental stage based on skeletal malocclusion.
가설 설정
1: The width of the epiphysis of the third finger proximal phalanx is as wide as the diaphysis.
2: The width of the epiphysis of the third finger middle phalanx is as wide as the diaphysis.
3: The width of the epiphysis of the fifth finger middle phalanx is as wide as the diaphysis.
4: Ossification of the sesamoid of the thumb is observed.
8: Fusion of the epiphysis and diaphysis at the third finger distal phalanx.
A: There is no fusion, but there is calcification at the superior crypt.
B: Calcified points are fused to unite the occlusal surface.
C: At the occlusal surface, enamel formation is completed. Dentinal deposition is observed.
D: Crown formation is completed at the cementoenamel junction. The pulp horns are beginning to differentiate.
G: Root formation is almost complete, but its apical end is still open.
H: Both root formation and periodontal ligament formation is completed.
제안 방법
After exclusion, a total of 192 patients, consisting of 89 males and 103 females, were enrolled in this study. All patients underwent cephalograms, panorama radiographs, and hand-wrist radiographs. Skeletal malocclusion was evaluated based on lateral cephalogram tracing.
In this study, the association between the dental developmental stage of each tooth and selected clinical parameters was examined. The dental developmental stages of the canine, first molar, and second molar were significantly associated with skeletal maturity index in the multivariate logistic regression mode.
The recorded data were analysed using the SPSS (Statistical Package for the Social Sciences) program. The indices allocated to reflect the dental developmental stage, chronological age, and the others were dichotomised based on the average value for bivariate analysis and logistical regression analysis. A chi-square test was used to determine the association between each of the independent variables and the dichotomous dependent variables.
대상 데이터
This study was approved by our local institutional review board and was performed in accordance with the Helsinki Declaration. A total of 237 patients were reviewed for this study. The inclusion criteria were (1) patient age between 6 and 14 years old, (2) patients visiting for orthodontic consultation from 2010 to 2012 years, and (3) patients having radiographic evaluation.
The exclusion criteria were (1) patients with medical histories that included injuries to the face or hands that disturb proper growth, (2) patients with any missing teeth in the left mandible, (3) patients who have syndromic disease, and (4) patients with poor-quality radiographs. After exclusion, a total of 192 patients, consisting of 89 males and 103 females, were enrolled in this study. All patients underwent cephalograms, panorama radiographs, and hand-wrist radiographs.
데이터처리
The indices allocated to reflect the dental developmental stage, chronological age, and the others were dichotomised based on the average value for bivariate analysis and logistical regression analysis. A chi-square test was used to determine the association between each of the independent variables and the dichotomous dependent variables. Stepwise logistical regression was then used to determine the factors associated with skeletal maturity index.
The odds ratios and confidence intervals were calculated from the regression coefficients. The differences of selected clinical parameters between the class II malocclusion and class III malocclusion groups were compared with an independent sample t test. The significance level was set as p < 0.
The statistical significance of the coefficients in the logistic regression models was tested using Wald statistics. The odds ratios and confidence intervals were calculated from the regression coefficients. The differences of selected clinical parameters between the class II malocclusion and class III malocclusion groups were compared with an independent sample t test.
The samples were analysed using the chi-square test, logistic regression models, and the independent sample t test. The recorded data were analysed using the SPSS (Statistical Package for the Social Sciences) program.
이론/모형
Hand-wrist radiographs of the skeletal maturity index taken from a total of 192 experiment subjects were sorted using Fishman’s method and then subsequently categorised into 11 different stages using Skeletal Maturity Indicators (Fig. 2)11).
In this experiment, the growth stages of patient skeletal maturity index were determined using Fishman’s method.
성능/효과
In conclusion, dental developmental stage was significantly associated with skeletal maturity. In addition, there was significant difference between class II and class III malocclusion with some types of tooth calcification.
후속연구
The success and failure on early orthodontic treatment is doing the treatment at an appropriate time, especially for growing children. As this paper is mainly based on comparing and analyzing the relationship between skeletal maturity index and dental developmental stage, this research will be very useful on finding out the adequate point of time on growth stage. To determine precise developmental stages, chronological age, skeletal maturity index and tooth calcification are used.
However, there is almost no report on dental development stages association with skeletal class I, II, III determined by APDI (anteroposterior dysplasia indicator) value which demonstrates maxilla and mandible overgrowth or undergrowth differenciation. Many studies about comparing and analyzing the relationship between skeletal maturity index and dental developmental stage have been introduced, but this paper will probably be the one of the first research with Korean children and so will provide a significant information to other paediatric dentists. The purpose of this study was to compare skeletal maturity index and dental developmental stage based on skeletal malocclusion.
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