Maturation Of Permanent Teeth Research Articles

Chronological Age and Dental Age Using Demirjian in Down Syndrome Children

Down syndrome is a chromosomal abnormality (trisomy 21) characterized by an extra chromosome 21. People with Down syndrome have impairement in mental and physical development, including delayed dental development. Dental age is stage of development of teeth measured by maturation stage of teeth. This study aims to determine or asses the growth or maturation of permanent teeth in children with Down syndrome. This research was a cross-sectional analysis. Analysis test using paired t-test to compare the average of chronological age to dental age, also unpaired t-test for comparing the dental age of children with Down syndrome to normal based on chronological age. The result showed that there was significant difference between chronological age and dental age in children with Down syndrome (p-value 0,05). The conclusion of this study showed that dental age more late than chronological age in children with Down syndrome. In spite dental age in Down syndrome children is descriptively later than in normal.

Secular trend in the maturation of permanent teeth in a sample of Turkish children over the past 30 years

This study was performed to evaluate the influence of secular trends on dental maturation among Turkish children over the past 30 years.Orthopantomograms of 757 (385 boys, 372 girls) Turkish children born in the 1980s, 1990s, and 2000s were evaluated. Three groups were formed based on decade with five subgroups by age from 9 to 13 years old for each gender. The number of samples in each age group and gender were matched. The mandibular left seven permanent teeth were evaluated based on formation stage to determine the overall dental maturity score. The groups were compared based on decade and gender. The Bonferroni-corrected Mann–Whitney U test and Kruskal–Wallis tests were used for statistical evaluation.Among 11-, 12-, and 13-year-olds born in the 2000s, girls exhibited significantly more mature dentition than did boys (p<0.01, p<0.05, and p<0.05, respectively). Twelve-year-old girls born in the 1990s and 2000s exhibited significantly more mature dentition than did girls born in the 1980s (p<0.01).Girls generally exhibited more mature dentition than boys. No significant positive secular trends in dental maturity were observed from the 1980s through the 2000s. Dental maturation among Turkish children was not affected by a secular trend.

Maturasi dan erupsi gigi permanen pada anak periode gigi pergantian (The maturition and eruption of permanent teeth in mixed dentition children)

Background: Tooth eruption might used as predictor of child age when the chronologic age is unknown. Beside the dental maturity, tooth eruption is also influenced by some factors, such as caries and tooth extraction. Purpose: The aim of this research was to examine the relationship of maturity and eruption of permanent teeth with chronologic age in mixed dentition period children. Methods: The subjects were patients of Prof. Soedomo Dental Hospital Pediatric Dental Clinic, consist of 38 boys and 39 girls in the aged of 6-12 years. The tooth eruption data was taken by counting the permanent teeth in intra oral examination. The dental maturity was assessed by Dermijian method from dental panoramic radiology. The data were statistical analyzed by regresion-correlation and t-test program of SPSS 16.0 for Windows. Results: Maturation of permanent teeth in each of age group was more advanced in girls than boys. However, only groups of 7, 8 and 11 years were showed significant different (p&lt;0.05), while for tooth eruption there was no significant difference (p&gt;0.05). The coefficient correlation between tooth eruption, chronologic age and dental maturation scores were relative high, between 0.75–0.86 (p&lt;0.01). The contribution of chronologic age and dental maturation to predict tooth eruption (R2) were 58–73.6%. The Dermijian method predicted age 0.83 years higher. Conclusion: There were close relationship between chronologic age, Dermijian method dental maturity, and eruption of permanen tooth, and could be used as predictor for eruption of permanent teeth in the mixed dentition period children. The Dermijian method predicted 0.83 years older than the chronologic age.Latar belakang: Erupsi gigi sering digunakan untuk memperkirakan umur anak. Selain maturasi gigi, erupsi gigi juga dipengaruhi oleh faktor, seperti karies dan pencabutan gigi. Tujuan: Penelitian ini bertujuan untuk meneliti hubungan antara maturasi dan erupsi gigi permanen dengan umur pada anak periode gigi bercampur. Metode: Subjek terdiri atas 38 anak laki-laki dan 39 anak perempuan berumur 5,98–11,90 tahun pasien klinik Ilmu Kedokteran Gigi Anak Rumah Sakit Gigi dan Mulut Prof. Soedomo, Fakultas Kedokteran Gigi Universitas Gadjah Mada. Penghitungan jumlah gigi permanen yang telah erupsi dilakukan dengan pemeriksaan klinis. Penentuan maturitas gigi metode Dermijian dilakukan dengan rontgen panoramik. Analisis statistik dengan regresi korelasi dan uji t program SPSS 16,0 for Windows. Hasil: Maturasi gigi permanen pada anak perempuan tiap kelompok umur lebih tinggi dibandingkan pada anak laki-laki, tetapi hanya pada kelompok umur 7, 8 dan 11 menunjukkan perbedaan bermakna (p&lt;0,05). Tidak ada perbedaan bermakna (p&gt;0,05) erupsi gigi antara laki-laki dan perempuan. Koefisisen korelasi antar erupsi gigi, umur kronologis, skor maturasi gigi cukup tinggi, yaitu 0,75–0,86 (p&lt;0,01). Kontribusi umur kronologis dan maturasi gigi dalam memprediksi erupsi gigi (R2) berkisar &gt; 58–73,6%. Metode Dermijian memprediksi umur 0,83 tahun lebih tinggi. Simpulan: Antara umur kronologis, maturasi gigi metode Dermijian dan erupsi gigi berhubungan erat, dan merupakan prediktor yang baik bagi erupsi gigi pada anak periode gigi bercampur. Metode Dermijian memprediksi 0,83 tahun lebih tinggi dibandingkan umur kronologis.

Secular trends in the maturation of permanent teeth in 5 to 6 years old children

This investigation aimed to evaluate the secular trend exhibited by developing permanent teeth in 5 to 6 years old southern Chinese children. Four hundred radiographs of children born in the years 1981 (n=200) and 2001 (n=200) were randomly selected, and then age and gender matched. Maxillary and mandibular teeth on the left side were scored. The number of tooth developmental stages (n-tds) for each stage of development and total n-tds in crown and root development was calculated. Logistic regression, X(2) test for occurrence of trend and Fisher's exact test were used to evaluate the variations in n-tds between crown and root maturation and also maturation among different teeth. Dental maturation between boys and girls was also compared. In the maxillary dentition, children born in 2001 showed advanced dental maturation (odds ratio, 1.29; P=0.001), and girls exhibited earlier maturation than boys (odds ratio, 1.43; P=0.001). In the mandibular dentition, no significant difference between the years was observed (odds ratio, 0.97; P=0.761), however, girls showed accelerated development than boys (odds ratio, 1.26; P=0.002). Variations in maturation were also observed between individual tooth in the same arch and between the arches. Children born in 2001 demonstrated accelerated dental development only in the maxillary dentition. Girls born in 1981 and 2001 exhibited advanced maturation than boys. Variations in development among different teeth in the year groups indicate the need for inclusion of all developing teeth to establish a secular change.

Secular Trends in the Maturation of Permanent Teeth in 5 to 6 Years Old Children

Secular Trends in the Maturation of Permanent Teeth in 5 to 6 Years Old Children

Maturation of permanent teeth in different facial types: A comparative study

Accurate diagnosis of dental maturation help in diagnosis, treatment planning, and timing in orthodontics and dentofacial orthopedics. The present study is undertaken to compare and correlate chronological age and dental age of patients with average, vertical, and horizontal facial types, and to find out any sex difference in dental age in different growth patterns and to evaluated the reliability of Willem's method in Indian population. Subjects in the age group of 8-10 years were screened from Out Patients Department of Orthodontics and Dentofacial Orthopedics and from the various school of the City, were subjected to cephalometric radiography and orthopentomograms. Angular and linear measurements used included;-SN Go-Gn angle, J.R. (Jarabak ratio) and LAFH (lower anterior facial height), to group total sample of 150 children. Group 1 (average grower), Group 2 (vertical grower), and Group 3 (horizontal grower). Then dental age for each child in different group was calculated from OPG of each subject and compared with chronological age using Student t-test. The results suggest a difference in dental age in subject with vertical and horizontal growers. Vertical grower showed earlier maturation compared to horizontal growth patterns. There was insignificant difference present when vertical grower and horizontal grower were compared with average growth pattern. Insignificant difference was found in dental age between males and females when compared to same growth pattern. Subjects with vertical growth pattern matured early than having the horizontal growth pattern in the same chronological age.