Helen M Liversidge
Biographic Data
| ID | 80042 |
|---|---|
| NAME | Helen M Liversidge |
| GIVEN NAMES | Helen M |
| FAMILY NAME | Liversidge |
| SIGNATURE | LIVERSIDGE H M |
| AFFILIATIONS | Queen Mary University of London |
| ORCID | 0000-0002-7056-9337 |
| VERIFIED | Yes |
| TOTAL WORKS | 29 |
| TOTAL CITATIONS | 471 |
| AUTHOR COUNT | 29 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1993 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 7 |
Permanent tooth stages assessment of panoramic radiographs and lateral cephalograms
Background Several classic craniofacial growth studies used lateral cephalograms (LCs) before the availability of panoramic radiographs (PRs). Are tooth stages comparable in these types of radiographs? Aim To compare tooth developmental stages of left side teeth in PR and LC using the methods of Moorrees, Fanning and Hunt and Demirjian, Goldstein and Tanner. Design Three hundred date-matched dental radiographs [n=300, 150 PRs and 150 LCs, 69 male…
Commentary on “new systems for dental maturity based on seven and four teeth” Demirjian and Goldstein, Annals of Human Biology, 1976,3,411-421
Bone-specific median age of hand-wrist maturation from Sudan
These results of individual maturity stages of phalanges, metacarpals, carpals and the distal epiphyses of the radius and ulna are useful to assess maturity in growing individuals from Sudan
Prior Probabilities and the Age Threshold Problem: First and Second Molar Development
Dental development has been used to assess whether an individual may be below or above an age that serves as a legal threshold. This study used development of the first and second mandibular molars from a large sample of individuals (N = 2,676) to examine the age threshold for minimum age of criminal responsibility. A bivariate ordered probit model was applied to dental scores following the Moorrees et al. (1963) system, with the addition of a cr…
A Comparison of Later Stage Dental Maturation in a Small Group of Children from Chernobyl and British Children
The aim of this study was to investigate the dental radiographic development of a small group of children born in Chernobyl, Ukraine, around the time of the nuclear disaster with an age matched group of British children. The design was a cross sectional non random retrospective study consisting of five boys and five girls from Chernobyl (age range 10.03 to 12.37) and 20 age and sex matched British children of white Caucasian origin. Developing pe…
Wisdom Tooth Formation as a Method of Estimating Age in a New Zealand Population
Dental ageing relies on assumptions aboutthe progression of tooth development from the middletrimester to adulthood and relative stability of thisprocess in the face of adverse dietary, hormonal, diseaseor nutritional factors. Most studies of dental ageingemploy the method of Demirjian et al., (1973), which isbased upon an assessment of crown and root formationstages from dental radiographs. Unfortunately, thismethod has a ceiling effect at age 1…
Demirjian Stage Tooth Formation Results from a Large Group of Children
The aim of this study is to present further data on the timing and variation of individual permanent mandibular teeth using Demirjian stages from a large collaboration. Seven mandibular permanent teeth were assessed from dental radiographs of healthy dental patients from Australia, Belgium, Canada, England, Finland, France, South Korea and Sweden (cross-sectional study; n = 9,371, 4,710 males, 4,661 females; aged 2–18). Data are presented in thre…
Accuracy of estimating age from eruption levels of mandibular teeth
Little is documented on the accu-racy of estimating age from alveolar eruption (AE) or partial eruption (PE). The aim of this study was to compare the accuracy of age estimation from eruption levels. Methods tested were Gleiser and Hunt (1955), Garn et al. (1958), Ando et al. (1965), Haavikko (1970) and clinical eruption from Smith et al. (1998). The sample was 946 panoramic dental radiographs from children aged 3-16 years. Left mandibular teeth …
Dental age estimation in a group of Kenyan children using Willems’ method: A radiographic study
Willem's model over-estimated dental age slightly and the method performed better in estimating the age of girls compared to boys. The majority of the children had their age estimated within 1 year of their chronological age. This suggests that Willems' method is suitable for estimating the ages of individual children in Kenya
Skeletal maturity of the hand in an East African group from Sudan
OBJECTIVES: Studies of skeletal maturity from Africa indicate a delay, reflected in a negative relative skeletal age (RSA). This study aims to evaluate the influence of age, socioeconomic status (SES) and nutritional status on skeletal maturation in a large sample of children from North Sudan. MATERIALS: The sample consisted 665 males and 1018 females from 3-25 years from Khartoum. Height, weight, age of menarche and, SES were recorded of patient…
The timing of mandibular tooth formation in two African groups
The mean ages of most mandibular tooth formation stages were generally not significantly different between ethnic groups or between males and females in this study
Optimal trait scoring for age estimation
OBJECTIVES: Little attention has been paid to questions about the applicability of parametric models to age estimation data and the related problem of how to adjust trait scoring in light of potential deviations from particular parametric models. This article addresses this deficit. METHODS: A Lagrange multiplier goodness-of-fit test is applied to two datasets to address the question of whether or not attainment ages for stages are log-normally d…
Age estimation
Controversies in age estimation from developing teeth
Adapted maturity data L9a and N25a reference data for this tooth performed best across age categories and tooth stages, with a mean absolute difference of 0.8 year
Age estimation in fossil hominins: Comparing dental development in early Homo with modern humans
A pattern appears to exist in early Homo where, both within and between developing dentitions, age estimates for stages of P4, M2 and M3 tooth formation fell consistently among the more advanced individuals of the modern human sample
Obituary Jules Kieser 1950–2014
Combining radiographic and histological data for dental development to compare growth in the past and the present
Stages of dental development in KNM-WT 15 000 were easily accommodated within this age distribution of a modern sample. However, body mass and stature estimates for KNM-WT 15 000 fell well beyond those reported for a modern sample of 438 Sudanese children aged between 7.0-10 years
Accuracy of dental age estimation charts: Schour and Massler, Ubelaker and the London Atlas
Dental age estimation charts are frequently used to assess maturity and estimate age. The aim of this study was to assess the accuracy of estimating age of three dental development charts (Schour and Massler, Ubelaker, and the London Atlas). The test sample was skeletal remains and dental radiographs of known‐age individuals ( N = 1,506, prenatal to 23.94 years). Dental age was estimated using charts of Schour and Massler, Ubelaker, and The Londo…
The assessment and interpretation of Demirjian, Goldstein and Tanner's dental maturity
BACKGROUND: A frequently reported advancement in dental maturity compared with the 50(th) percentile of Demirjian, Goldstein and Tanner (1973, Hum Biol 45:211-27) has been interpreted as a population difference. AIM: To review the assessment and interpretation of Demirjian et al.'s dental maturity. SUBJECTS AND METHODS: Dental maturity of boys from published reports was compared as maturity curves and difference to the 50(th) percentile in terms …
Similarity in dental maturation in two ethnic groups of London children
Dental maturity of permanent teeth was similar in these ethnic groups
Brief communication: The London atlas of human tooth development and eruption
The aim of this study was to develop a comprehensive evidence‐based atlas to estimate age using both tooth development and alveolar eruption for human individuals between 28 weeks in utero and 23 years. This was a cross‐sectional, retrospective study of archived material with the sample aged 2 years and older having a uniform age and sex distribution. Developing teeth from 72 prenatal and 104 postnatal skeletal remains of known age‐at‐death were …
Bias and accuracy of age estimation using developing teeth in 946 children
Developing teeth are used to assess maturity and estimate age in several disciplines. The aim of the study was to determine which of the most well known dental age estimation methods was best at estimating age. The target sample of dental radiographs ( N = 946, ages 3–16) was described by Maber et al. (Forensic Sci Int 159 ( 2006 ) S68–S73). Seven mandibular permanent teeth (I 1 –M 2 ) were assessed, and dental age was calculated using four denta…
Timing of human mandibular third molar formation
These results show for the first time a significant difference in the timing of maturation of the mandibular third molar between groups with South African Black children being earlier than other groups
Advanced dental maturation in New Zealand Maori and Pacific Island children
This study employs Demirjian's (1994: CD Rom. Norwood, MA: Silver Platter Education) method for assessing dental maturation to compare the rates of development in children of three ethnic populations living in New Zealand-Maori, Pacific Island, and European. We test the hypothesis that Maori and Pacific Island children will have significantly advanced dental maturation compared with New Zealand children of European extraction. The study populatio…
Timing of Demirjian's tooth formation stages
Background: Global differences in Demirjian et al.'s method of assessing dental maturity are thought to be due to population differences.Aim: The aim of this study was to investigate the timing of individual tooth formation stages in children from eight countries.Research design: This was a meta-analysis of previously published data from retrospective cross-sectional studies of dental maturity.Method: Data of mandibular permanent developing teeth…
Brief communication: The London atlas of human tooth development and eruption
The aim of this study was to develop a comprehensive evidence‐based atlas to estimate age using both tooth development and alveolar eruption for human individuals between 28 weeks in utero and 23 years. This was a cross‐sectional, retrospective study of archived material with the sample aged 2 years and older having a uniform age and sex distribution. Developing teeth from 72 prenatal and 104 postnatal skeletal remains of known age‐at‐death were …
Variation in crown and root formation and eruption of human deciduous teeth
The aim of this study was to document variation of deciduous tooth formation and eruption. The material comprises 121 individuals of known or estimated age (using tooth length) from Spitalfields in London, and radiographs of 61 healthy living children aged 2–5 years. Other skeletal material from two medieval Scottish archaeological sites (Whithorn, N = 74; Newark Bay, N = 59) was also examined. Stages of crown and root formation as well as erupti…
Increasing human tooth length between birth and 5.4 years
Most previous studies of tooth development have used fractional stages of tooth formation to construct growth standards suitable for aging juvenile skeletal material. A simple alternative for determining dental age is to measure tooth length throughout development. In this study, data on tooth length development are presented from 63 individuals of known age at death, between birth and 5.4 years, from an archeological population recovered from th…
Accuracy of dental age estimation charts: Schour and Massler, Ubelaker and the London Atlas
Dental age estimation charts are frequently used to assess maturity and estimate age. The aim of this study was to assess the accuracy of estimating age of three dental development charts (Schour and Massler, Ubelaker, and the London Atlas). The test sample was skeletal remains and dental radiographs of known‐age individuals ( N = 1,506, prenatal to 23.94 years). Dental age was estimated using charts of Schour and Massler, Ubelaker, and The Londo…
Accuracy of age estimation from developing teeth of a population of known age (0-5.4 years)
The accuracy of several methods of age estimation based on developing teeth was tested on 63 individuals of known age between 0 and 5.4 years from the Spitalfields Collection. The following methods of age estimation were tested: atlas method of Schour and Massler; diagram of Gustafson and Koch; mineralization age of some deciduous and permanent teeth, Moorrees, Fanning and Hunt, a modified method of Moorrees et al. by Smith, and quantitative meth…
Age estimation in fossil hominins: Comparing dental development in early Homo with modern humans
A pattern appears to exist in early Homo where, both within and between developing dentitions, age estimates for stages of P4, M2 and M3 tooth formation fell consistently among the more advanced individuals of the modern human sample
Bias and accuracy of age estimation using developing teeth in 946 children
Developing teeth are used to assess maturity and estimate age in several disciplines. The aim of the study was to determine which of the most well known dental age estimation methods was best at estimating age. The target sample of dental radiographs ( N = 946, ages 3–16) was described by Maber et al. (Forensic Sci Int 159 ( 2006 ) S68–S73). Seven mandibular permanent teeth (I 1 –M 2 ) were assessed, and dental age was calculated using four denta…
Demirjian Stage Tooth Formation Results from a Large Group of Children
The aim of this study is to present further data on the timing and variation of individual permanent mandibular teeth using Demirjian stages from a large collaboration. Seven mandibular permanent teeth were assessed from dental radiographs of healthy dental patients from Australia, Belgium, Canada, England, Finland, France, South Korea and Sweden (cross-sectional study; n = 9,371, 4,710 males, 4,661 females; aged 2–18). Data are presented in thre…
Optimal trait scoring for age estimation
OBJECTIVES: Little attention has been paid to questions about the applicability of parametric models to age estimation data and the related problem of how to adjust trait scoring in light of potential deviations from particular parametric models. This article addresses this deficit. METHODS: A Lagrange multiplier goodness-of-fit test is applied to two datasets to address the question of whether or not attainment ages for stages are log-normally d…
Wisdom Tooth Formation as a Method of Estimating Age in a New Zealand Population
Dental ageing relies on assumptions aboutthe progression of tooth development from the middletrimester to adulthood and relative stability of thisprocess in the face of adverse dietary, hormonal, diseaseor nutritional factors. Most studies of dental ageingemploy the method of Demirjian et al., (1973), which isbased upon an assessment of crown and root formationstages from dental radiographs. Unfortunately, thismethod has a ceiling effect at age 1…
Accuracy of estimating age from eruption levels of mandibular teeth
Little is documented on the accu-racy of estimating age from alveolar eruption (AE) or partial eruption (PE). The aim of this study was to compare the accuracy of age estimation from eruption levels. Methods tested were Gleiser and Hunt (1955), Garn et al. (1958), Ando et al. (1965), Haavikko (1970) and clinical eruption from Smith et al. (1998). The sample was 946 panoramic dental radiographs from children aged 3-16 years. Left mandibular teeth …
Increasing human tooth length between birth and 5.4 years
Most previous studies of tooth development have used fractional stages of tooth formation to construct growth standards suitable for aging juvenile skeletal material. A simple alternative for determining dental age is to measure tooth length throughout development. In this study, data on tooth length development are presented from 63 individuals of known age at death, between birth and 5.4 years, from an archeological population recovered from th…
Accuracy of age estimation from developing teeth of a population of known age (0-5.4 years)
The accuracy of several methods of age estimation based on developing teeth was tested on 63 individuals of known age between 0 and 5.4 years from the Spitalfields Collection. The following methods of age estimation were tested: atlas method of Schour and Massler; diagram of Gustafson and Koch; mineralization age of some deciduous and permanent teeth, Moorrees, Fanning and Hunt, a modified method of Moorrees et al. by Smith, and quantitative meth…
Growth of permanent mandibular teeth of British children aged 4 to 9 years
These findings failed to demonstrate an ethnic difference in tooth formation in these children
Variation in crown and root formation and eruption of human deciduous teeth
The aim of this study was to document variation of deciduous tooth formation and eruption. The material comprises 121 individuals of known or estimated age (using tooth length) from Spitalfields in London, and radiographs of 61 healthy living children aged 2–5 years. Other skeletal material from two medieval Scottish archaeological sites (Whithorn, N = 74; Newark Bay, N = 59) was also examined. Stages of crown and root formation as well as erupti…
Timing of Demirjian's tooth formation stages
Background: Global differences in Demirjian et al.'s method of assessing dental maturity are thought to be due to population differences.Aim: The aim of this study was to investigate the timing of individual tooth formation stages in children from eight countries.Research design: This was a meta-analysis of previously published data from retrospective cross-sectional studies of dental maturity.Method: Data of mandibular permanent developing teeth…
Advanced dental maturation in New Zealand Maori and Pacific Island children
This study employs Demirjian's (1994: CD Rom. Norwood, MA: Silver Platter Education) method for assessing dental maturation to compare the rates of development in children of three ethnic populations living in New Zealand-Maori, Pacific Island, and European. We test the hypothesis that Maori and Pacific Island children will have significantly advanced dental maturation compared with New Zealand children of European extraction. The study populatio…
Timing of human mandibular third molar formation
These results show for the first time a significant difference in the timing of maturation of the mandibular third molar between groups with South African Black children being earlier than other groups
Brief communication: The London atlas of human tooth development and eruption
The aim of this study was to develop a comprehensive evidence‐based atlas to estimate age using both tooth development and alveolar eruption for human individuals between 28 weeks in utero and 23 years. This was a cross‐sectional, retrospective study of archived material with the sample aged 2 years and older having a uniform age and sex distribution. Developing teeth from 72 prenatal and 104 postnatal skeletal remains of known age‐at‐death were …
Bias and accuracy of age estimation using developing teeth in 946 children
Developing teeth are used to assess maturity and estimate age in several disciplines. The aim of the study was to determine which of the most well known dental age estimation methods was best at estimating age. The target sample of dental radiographs ( N = 946, ages 3–16) was described by Maber et al. (Forensic Sci Int 159 ( 2006 ) S68–S73). Seven mandibular permanent teeth (I 1 –M 2 ) were assessed, and dental age was calculated using four denta…
Similarity in dental maturation in two ethnic groups of London children
Dental maturity of permanent teeth was similar in these ethnic groups
The assessment and interpretation of Demirjian, Goldstein and Tanner's dental maturity
BACKGROUND: A frequently reported advancement in dental maturity compared with the 50(th) percentile of Demirjian, Goldstein and Tanner (1973, Hum Biol 45:211-27) has been interpreted as a population difference. AIM: To review the assessment and interpretation of Demirjian et al.'s dental maturity. SUBJECTS AND METHODS: Dental maturity of boys from published reports was compared as maturity curves and difference to the 50(th) percentile in terms …
Obituary Jules Kieser 1950–2014
Combining radiographic and histological data for dental development to compare growth in the past and the present
Stages of dental development in KNM-WT 15 000 were easily accommodated within this age distribution of a modern sample. However, body mass and stature estimates for KNM-WT 15 000 fell well beyond those reported for a modern sample of 438 Sudanese children aged between 7.0-10 years
Accuracy of dental age estimation charts: Schour and Massler, Ubelaker and the London Atlas
Dental age estimation charts are frequently used to assess maturity and estimate age. The aim of this study was to assess the accuracy of estimating age of three dental development charts (Schour and Massler, Ubelaker, and the London Atlas). The test sample was skeletal remains and dental radiographs of known‐age individuals ( N = 1,506, prenatal to 23.94 years). Dental age was estimated using charts of Schour and Massler, Ubelaker, and The Londo…
Age estimation
Controversies in age estimation from developing teeth
Adapted maturity data L9a and N25a reference data for this tooth performed best across age categories and tooth stages, with a mean absolute difference of 0.8 year
Age estimation in fossil hominins: Comparing dental development in early Homo with modern humans
A pattern appears to exist in early Homo where, both within and between developing dentitions, age estimates for stages of P4, M2 and M3 tooth formation fell consistently among the more advanced individuals of the modern human sample
The timing of mandibular tooth formation in two African groups
The mean ages of most mandibular tooth formation stages were generally not significantly different between ethnic groups or between males and females in this study
Optimal trait scoring for age estimation
OBJECTIVES: Little attention has been paid to questions about the applicability of parametric models to age estimation data and the related problem of how to adjust trait scoring in light of potential deviations from particular parametric models. This article addresses this deficit. METHODS: A Lagrange multiplier goodness-of-fit test is applied to two datasets to address the question of whether or not attainment ages for stages are log-normally d…
Dental age estimation in a group of Kenyan children using Willems’ method: A radiographic study
Willem's model over-estimated dental age slightly and the method performed better in estimating the age of girls compared to boys. The majority of the children had their age estimated within 1 year of their chronological age. This suggests that Willems' method is suitable for estimating the ages of individual children in Kenya
Skeletal maturity of the hand in an East African group from Sudan
OBJECTIVES: Studies of skeletal maturity from Africa indicate a delay, reflected in a negative relative skeletal age (RSA). This study aims to evaluate the influence of age, socioeconomic status (SES) and nutritional status on skeletal maturation in a large sample of children from North Sudan. MATERIALS: The sample consisted 665 males and 1018 females from 3-25 years from Khartoum. Height, weight, age of menarche and, SES were recorded of patient…
A Comparison of Later Stage Dental Maturation in a Small Group of Children from Chernobyl and British Children
The aim of this study was to investigate the dental radiographic development of a small group of children born in Chernobyl, Ukraine, around the time of the nuclear disaster with an age matched group of British children. The design was a cross sectional non random retrospective study consisting of five boys and five girls from Chernobyl (age range 10.03 to 12.37) and 20 age and sex matched British children of white Caucasian origin. Developing pe…
Wisdom Tooth Formation as a Method of Estimating Age in a New Zealand Population
Dental ageing relies on assumptions aboutthe progression of tooth development from the middletrimester to adulthood and relative stability of thisprocess in the face of adverse dietary, hormonal, diseaseor nutritional factors. Most studies of dental ageingemploy the method of Demirjian et al., (1973), which isbased upon an assessment of crown and root formationstages from dental radiographs. Unfortunately, thismethod has a ceiling effect at age 1…
Demirjian Stage Tooth Formation Results from a Large Group of Children
The aim of this study is to present further data on the timing and variation of individual permanent mandibular teeth using Demirjian stages from a large collaboration. Seven mandibular permanent teeth were assessed from dental radiographs of healthy dental patients from Australia, Belgium, Canada, England, Finland, France, South Korea and Sweden (cross-sectional study; n = 9,371, 4,710 males, 4,661 females; aged 2–18). Data are presented in thre…
Accuracy of estimating age from eruption levels of mandibular teeth
Little is documented on the accu-racy of estimating age from alveolar eruption (AE) or partial eruption (PE). The aim of this study was to compare the accuracy of age estimation from eruption levels. Methods tested were Gleiser and Hunt (1955), Garn et al. (1958), Ando et al. (1965), Haavikko (1970) and clinical eruption from Smith et al. (1998). The sample was 946 panoramic dental radiographs from children aged 3-16 years. Left mandibular teeth …
Forensic Anthropology and Bioarchaeology Studies (26 works) · Medicine (23 works) · Demography (21 works) · Dentistry (18 works) · dental development and anomalies (17 works) · Orthodontics (17 works) · Demography (12 works) · Dental Radiography and Imaging (12 works) · Molar (12 works) · Age groups (10 works)