TY - JOUR
T1 - Enamel multidien biological timing and body size variability among individuals of Chinese Han and Tibetan origins
AU - Karaaslan, Hakan
AU - Seckinger, Jeffrey
AU - Almabrok, Amel
AU - Hu, Bin
AU - Dong, Hui
AU - Xia, Dengsheng
AU - Dekyi, Tsering
AU - Hogg, Russell T.
AU - Zhou, Jian
AU - Bromage, Timothy G.
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China grants 81570939 and 81741106, a Natural Science Foundation of Tibet Autonomous Region grant to Jian Zhou and NYUCD Summer Research Experience and Honours in Research. The authors are grateful to Albert H. Kim, Rima Modi, and Hosnia Samadi for contributing to the interobserver team of people calculating RP for the study sample. The authors thank the New York University College of Dentistry?s Office of Research that provided Summer Research Experience and Honors in Research program support to students working on the project.
Publisher Copyright:
© 2020, © 2020 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2020
Y1 - 2020
N2 - Aims: To measure the number of days of enamel formation between periodic striae of Retzius growth lines, the Retzius periodicity (RP), and to compare this multi-day, or multidien rhythm, to body height and weight among people from Beijing, China and Lhasa, Tibet/China. Subjects and methods: Subjects requiring dental extractions from clinics in Beijing, China (N = 338) and Lhasa, Tibet/China (N = 227) provided a tooth and body size information. Multiple observers examined histological sections of the teeth and recorded RP. RP values were statistically compared to body height and weight. Results: In Beijing and Lhasa samples, respectively, average height was 166.38 and 165.70 cm, average weight was 59.53 and 66.53 kg, and average RP was 7.47 and 7.69 d. Statistically significant differences were found between Beijing and Lhasa weight and RP means. Correlations for height and weight against RP were significant, but only comparatively strong for height. Conclusions: Supporting the negative correlation presented in previous studies, RP is negatively associated with height and weight among a large intraspecific sample of people from Beijing and Lhasa. RP represents a metabolic-mediated multidien biological timing mechanism responsible for the rate of cell proliferation and maintenance of the body.
AB - Aims: To measure the number of days of enamel formation between periodic striae of Retzius growth lines, the Retzius periodicity (RP), and to compare this multi-day, or multidien rhythm, to body height and weight among people from Beijing, China and Lhasa, Tibet/China. Subjects and methods: Subjects requiring dental extractions from clinics in Beijing, China (N = 338) and Lhasa, Tibet/China (N = 227) provided a tooth and body size information. Multiple observers examined histological sections of the teeth and recorded RP. RP values were statistically compared to body height and weight. Results: In Beijing and Lhasa samples, respectively, average height was 166.38 and 165.70 cm, average weight was 59.53 and 66.53 kg, and average RP was 7.47 and 7.69 d. Statistically significant differences were found between Beijing and Lhasa weight and RP means. Correlations for height and weight against RP were significant, but only comparatively strong for height. Conclusions: Supporting the negative correlation presented in previous studies, RP is negatively associated with height and weight among a large intraspecific sample of people from Beijing and Lhasa. RP represents a metabolic-mediated multidien biological timing mechanism responsible for the rate of cell proliferation and maintenance of the body.
KW - Enamel
KW - multidien rhythm
KW - striae of Retzius periodicity
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U2 - 10.1080/03014460.2020.1785010
DO - 10.1080/03014460.2020.1785010
M3 - Article
C2 - 32657156
AN - SCOPUS:85087877356
SP - 1
EP - 7
JO - Annals of Human Biology
JF - Annals of Human Biology
SN - 0301-4460
ER -