Age estimation based on three-dimensional measurement of mandibular central incisors in Japanese

Someda, Hidetoshi; Saka, Hideki; Matsunaga, Satoru; Ide, Yoshinobu; Nakahara, Ken; Hirata, Shuzo; Hashimoto, Masatsugu

doi:10.1016/j.forsciint.2009.01.001

Cited by 102 publications

(110 citation statements)

References 9 publications

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“…Someda et al 17) performed a regression analysis for age estimation based on the correlation between aging and decrease in the pulp chamber volume using the mandibular central incisors as samples, and reported that a higher correlation was observed in females than in males. The results of the present study support Someda et al 's results and provide further evidence for a distinct sex difference.…”

Section: Discussionmentioning

confidence: 99%

“…Based on these measurements, the volume ratios of the pulp chamber to the whole tooth except the enamel were calculated following the method of Someda et al 17) (Fig. 1).…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, the effectiveness of threedimensional measurement using micro-CT remains to be fully utilized. The only threedimensional evaluations of a decrease in the pulp chamber with age were reported by Aboshi et al 2) and Someda et al 17) . Aboshi et al described an age estimation method based on calculation of pulp/tooth volume ratios for various regions of the mandibular first premolars, and Someda et al reported age estimation based on calculation of pulp/ tooth volume ratios between sexes using mandibular central incisors.…”

Section: Introductionmentioning

confidence: 99%

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Three-dimensional Observation of Decrease in Pulp Cavity Volume Using Micro-CT: Age-related Change

Agematsu

Someda

Hashimoto

et al. 2010

Bull. Tokyo Dent. Coll.

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We investigated three-dimensional decrease in the volume of the pulp chamber caused by age-related secondary dentin formation using micro-CT and evaluated the applicability of the results to evaluation of age taking into account sex, age and tooth type. Decrease was slightly higher in females than in males, and a higher correlation between decrease and aging was observed in females. A comparison between age-groups revealed that decrease progressed between the fifties and sixties in males, and the forties and fifties in females. A stronger correlation between aging and decrease was observed in the mandibular central incisors than in the mandibular second premolars. This correlation was higher than other correlations between sexes and age-groups.

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Section: Discussionmentioning

confidence: 99%

“…Based on these measurements, the volume ratios of the pulp chamber to the whole tooth except the enamel were calculated following the method of Someda et al 17) (Fig. 1).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Three-dimensional Observation of Decrease in Pulp Cavity Volume Using Micro-CT: Age-related Change

Agematsu

Someda

Hashimoto

et al. 2010

Bull. Tokyo Dent. Coll.

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“…Therefore, numerous studies have been conducted to date modifying or testing the dental radiograph-based age-estimation methods (Kvaal et al, 1995;Drusini et al, 1997;Kolltveit et al, 1998;Willems et al, 2002;Bosmans et al, 2005;Paewinsky et al, 2005;Cameriere et al, 2007;Meinl et al, 2007;Drusini, 2008;Landa et al, 2009;Du et al, 2011;Cameriere et al, 2013). Meanwhile, with the development of computed tomography (CT) technology, the pulp cavity and the tooth can now be measured in three-dimensional space (Vandevoort et al, 2004;Yang et al, 2006;Someda et al, 2009;Aboshi et al, 2010;Agematsu et al, 2010;Star et al, 2011). In those studies, pulp volume ratios were calculated from the CT images and were used for subsequent regression analyses against a few types of teeth: lower central incisors (Someda et al, 2009;Agematsu et al, 2010), lower first premolars (Aboshi et al, 2010), and lower second premolars (Aboshi et al, 2010;Agematsu et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Human age estimation from lower-canine pulp volume ratio based on Bayes’ theorem with modern Japanese population as prior distribution

Sasaki

Kondo

2014

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Pulp volume decreases throughout life owing to secondary dentin deposition. Here, we present a Bayesian approach for human age estimation on the basis of the pulp volume ratio from lower-canine teeth. We measured the pulp and tooth volumes of 363 subjects (209 males, 154 females) of known age based on three-dimensional imageries from microcomputed tomography scans. Pulp volume ratio was defined as pulp/tooth volume within the root portion (PVRrt) and its reduction with age was modeled by simple statistical assumptions to produce a likelihood function of PVRrt by fitting the model to the observed data. Following Bayes' theorem, we obtained the probability density function (PDF) of estimated age for a given PVRrt, for males, females, and gender unknowns; we used the modern Japanese population as of 2012 as prior age distribution. The PDF of estimated age provided the mean and 50%, 70%, and 90% prediction intervals, based on which we compared the present ageestimation method with that of Brooks and Suchey (Human Evolution, 5: 227-238), which is based on pubic symphysis metamorphosis. We could not find any advantages of the PVRrt method compared to the Suchey-Brooks method for the case of males or gender unknowns as far as the prediction intervals were concerned. However, for females, the PVRrt method offered comparable precision to the SucheyBrooks method. Taking into account other advantages such as sustainability of the material and continuous property of the age-indicator value, we conclude that the PVRrt method is useful in forensic cases, especially those involving female victims.

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“…By the age of 20 years, growth and dental development are complete, and thus become less important, while the physiological changes of use predominate. Therefore, beyond this age, an assessment of age, which is solely based on dental age, has to be judged less reliable [5].…”

Section: Introductionmentioning

confidence: 99%

Possibilities of Dental Age Assessment in Permanent Teeth: A Review

Willershausen

Försch²,

Willershausen³

2012

Dentistry

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The developmental stages of the first and second dentition, combined with abrasive wear of the dental hard tissue can be used for age determination in many mammal species and in humans. Concerning dental age determination, one has to distinguish between invasive techniques, which are mainly applied in dead individuals, and non-invasive methods suitable for living individuals. In contrast to in adults, where only few parameters are available for orientation, age determination in children and adolescents is in general fairly easy, and is facilitated by stereotypical biological growth patterns. In the present article, different methods for dental age determination are introduced, with a special focus on the fields of application, and on the limits of age determination. With increasing age, the number of valid and meaningful dental characteristics diminishes, and therefore the accuracy of dental age assessment decreases.

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Age estimation based on three-dimensional measurement of mandibular central incisors in Japanese

Cited by 102 publications

References 9 publications

Three-dimensional Observation of Decrease in Pulp Cavity Volume Using Micro-CT: Age-related Change

Three-dimensional Observation of Decrease in Pulp Cavity Volume Using Micro-CT: Age-related Change

Human age estimation from lower-canine pulp volume ratio based on Bayes’ theorem with modern Japanese population as prior distribution

Possibilities of Dental Age Assessment in Permanent Teeth: A Review

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