Article
Medicine, General & Internal
Maria Marcianes, Pablo Garcia-Camba, Alberto Albaladejo, Margarita Varela Morales
Summary: This study found a higher frequency of hypomineralized second primary molars (HSPM) in children with molar incisor hypomineralization (MIH). However, there was no correlation between the severity of MIH and the presence of HSPM. HSPM may serve as a predictor of MIH.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Multidisciplinary Sciences
Thomas W. Davies, Zeresenay Alemseged, Agness Gidna, Jean-Jacques Hublin, William H. Kimbel, Ottmar Kullmer, Fred Spoor, Clement Zanolli, Matthew M. Skinner
Summary: Studies of hominin dental morphology often analyze the presence and patterns of accessory cusps on lower molars. Research on the enamel-dentine junction (EDJ) has revealed that the expression of these accessory cusps may be more variable than previously thought. Taxon-specific patterns in accessory cusp expression at the EDJ have been identified, which differ in certain hominin species such as Paranthropus robustus and Homo habilis. The presence of double and triple accessory cusps, as well as the developmental complexities of cusp patterning, suggest caution in taxonomic interpretations based on accessory cusps comparisons.
Review
Dentistry, Oral Surgery & Medicine
Lea Masse, Olivier Etienne, Emmanuelle Noirrit-Esclassan, Isabelle Bailleul-Forestier, Elsa Garot
Summary: The microstructure and mechanical properties of enamel and dentine in cases of dentine disorders like dentinogenesis imperfecta and osteogenesis imperfecta are significantly altered, resulting in reduced mineral density, hardness, modulus of elasticity, and abnormal microstructure in the affected tissues. Clinical recommendations for adhesive cementation include preserving residual enamel, sandblasting tooth surfaces for increased roughness, choosing a universal adhesive, and reinforcing enamel and dentine with infiltrant resins. Additional in vivo studies are needed to confirm these findings based on in vitro research.
JOURNAL OF DENTISTRY
(2021)
Article
Multidisciplinary Sciences
Shiyou Xu, Michael Stranick, Deon Hines, Ke Du, Long Pan
Summary: In this study, a novel method utilizing metal staining was proposed to protect the organic portions of dentine structure during FIB milling, resulting in reduced porosity and improved SEM image quality. The method also enabled EDS mapping without additional metal coating and significantly reduced data acquisition time for 3-D elemental mapping.
SCIENTIFIC REPORTS
(2022)
Article
Dentistry, Oral Surgery & Medicine
Ian Towle, Amira Samir Salem, Alessio Veneziano, Carolina Loch
Summary: Micro-CT scans provide reliable data on enamel and dentine mineral concentration and total effective density, which reflect mechanical properties of dental tissues. This non-destructive method can be used to investigate functional adaptations, wear patterns, and the effects of diet, pathology, and aging on teeth. The study found higher mineral concentration and total effective density values in thicker enamel areas, and lower values in dentine. Buccal positions had significantly higher values compared to lingual areas, and cuspal positions had higher values compared to lateral enamel. Mesial enamel had lower values than other locations.
ARCHIVES OF ORAL BIOLOGY
(2023)
Article
Dentistry, Oral Surgery & Medicine
Frederico Barbosa de Sousa, Anderson Takeo Hara
Summary: We propose a new theory explaining the formation of enamel cupping lesions. These lesions showed increased porosity at two structural prismatic traits: the central cone extending into the enamel-dentine junction and the type-I Hunther-Schreger bands (HSB), suggesting them to be the main drivers for cupping lesion formation and development. In addition, these lesions were circumscribed by type-II HSBs which had lower surface porosity and higher resistance to wear. This theory was verified in in vitro observations, potentially elucidating the mechanisms involved in cupping lesion formation.
Review
Multidisciplinary Sciences
Zi-ang Sun, Yong Jiang, Kejing Wang, Xiaomin Fan, Wei Wang
Summary: This article presents two cases with C-shaped configuration diagnosed during root canal retreatment and conducts a literature review of maxillary second molar anatomy. The use of CBCT imaging coupled with an operative dental microscope can aid in identifying and treating the complexities of the root canal system.
Article
Paleontology
Josep Fortuny, Clement Zanolli, Federico Bernardini, Claudio Tuniz, David M. Alba
Summary: Extensive fieldwork in Abocador de Can Mata in the northeast of the Iberian Peninsula has revealed previously unknown diversity of catarrhine primates in the middle Miocene of Europe. By examining 3D endostructural morphology of hominoid molars, the study supports the distinction between different species, particularly the differentiation of Pierolapithecus and Anoiapithecus from Dryopithecus.
Article
Dentistry, Oral Surgery & Medicine
Aline Leite de Farias, Diego Fernando Rojas-Gualdron, Diego Girotto Bussaneli, Lourdes Santos-Pinto, Juan Diego Mejia, Manuel Restrepo
Summary: This study explored the association between MIH and enamel hypomineralization of the second permanent molars. Severe defects in first permanent molars were linked to mild defects in the second permanent molars, and enamel hypomineralization was associated with increased caries experience.
INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY
(2022)
Article
Anthropology
Beatriz Gamarra, Marina Lozano, Antonietta Del Bove, M. Eulalia Subira, Manuel Edo, Concepcio Castellana, Josep Maria Verges, Juan Ignacio Morales, Artur Cebria, F. Xavier Oms, Carlos Tornero, Anna Gomez-Bach
Summary: Neolithisation had diverse impacts on genomic and cultural diversity in the Iberian Peninsula. Genetic admixture and human mobility resulted in decreased genomic heterogeneity. Dental morphology is an effective tool for studying genetic variability and biological affinities in ancient populations.
ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
(2022)
Article
Multidisciplinary Sciences
Summayah Khawaja, Nouf Alharbi, Jahanzeb Chaudhry, Amar Hasan Khamis, Rashid El Abed, Ahmed Ghoneima, Mohamed Jamal
Summary: This study aimed to describe the root and canal morphology of mandibular second molars in Emirati population, with a relatively high prevalence of C-shaped canal configuration (17.9%), especially in females. Specific types of morphological changes in C-shaped molars along the root length were observed and described for the first time in this population.
SCIENTIFIC REPORTS
(2021)
Article
Dentistry, Oral Surgery & Medicine
Katherine A. Nordeen, John G. Kharouf, Tad R. Mabry, William O. Dahlke, Soraya Beiraghi, Amy W. Tasca
Summary: This study investigated pre-extraction variables associated with spontaneous space closure of the permanent second molar (PSM) following early extraction of the permanent first molar (PFM), and tested the applicability of a prediction model. The results showed that the rates of spontaneous space closure are significantly lower in the mandible compared to the maxilla. Chronological age and permanent second molar developmental stage were found to be the primary predictors for successful substitution with the permanent second molar.
PEDIATRIC DENTISTRY
(2022)
Article
Dentistry, Oral Surgery & Medicine
Alfredo Sierra-Cristancho, Luis Gonzalez-Osuna, Julian Balanta-Melo, Emilio A. Cafferata, Carolina Rojas, Samanta Melgar-Rodriguez, Paola Carvajal, Rolando Vernal
Summary: This study describes the dentine thickness in mandibular first premolars with C-shaped root canals and identifies the areas with thinner canal walls as potential danger zones. In addition, it analyzes the internal and external anatomical characteristics of these teeth and their association with dentine thickness.
INTERNATIONAL ENDODONTIC JOURNAL
(2022)
Article
Dentistry, Oral Surgery & Medicine
Adithya A. Sherwood, Anand I. Sherwood, Frank C. Setzer, Sheela K. Devi, Jasmin V. Shamili, Caroline John, Falk Schwendicke
Summary: This study developed a deep learning model to classify C-shaped canal anatomy in mandibular second molars and compared the performance of different architectures. The results showed that Xception U-Net and residual U-Net outperformed U-Net, and the addition of contrast-limited adaptive histogram equalization improved overall architecture efficacy.
JOURNAL OF ENDODONTICS
(2021)
Article
Medicine, General & Internal
Luka Hocevar, Zoran Mandinic, Jelena Mandic, Alenka Pavlic
Summary: Molar-incisor hypomineralization (MIH) is a developmental defect affecting dental enamel, characterized by demarcated opacities and enamel breakdown. Similar pathological signs can also be seen in deciduous molars. Regular dental visits for early diagnosis and appropriate treatment, including preventive measures, are crucial in MIH patients.
SRPSKI ARHIV ZA CELOKUPNO LEKARSTVO
(2021)
Article
Anthropology
Ghislain Thiery, Franck Guy, Vincent Lazzari
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
(2019)
Article
Anthropology
Tianmeng He, Takeaki Honda, Yosuke Kurihara, Ghislain Thiery
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
(2020)
Article
Geography, Physical
Ghislain Thiery, John Chih Mun Sha
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2020)
Article
Ecology
Ghislain Thiery, Corentin Gibert, Franck Guy, Vincent Lazzari, Denis Geraads, Nikolai Spassov, Gildas Merceron
Summary: The study on two colobine monkeys, Mesopithecus delsoni and Mesopithecus pentelicus, in late Miocene southeastern Europe revealed different dietary niches, with the former being better adapted to folivory while the latter showed characteristics of a seed eater. This suggests that colobines may have evolved adaptations to leaf consumption either before their dispersal to Europe or in multiple occurrences during evolution.
Article
Geography, Physical
Corentin Gibert, Anais Vignoles, Camille Contoux, William E. Banks, Doris Barboni, Jean-Renaud Boisserie, Olivier Chavasseau, Frederic Fluteau, Franck Guy, Camille Nous, Olga Otero, Pierre Sepulchre, Antoine Souron, Gilles Ramstein
Summary: This study examines the potential geographic areas accessible to hominins during the mid-to-late Pliocene period. By estimating the suitable climate conditions for hominins using a climate model and habitat suitability algorithm, the researchers found that central Sahel and northeastern Africa had favorable habitats, while there was a discontinuity between eastern and southern Africa. The study suggests that southern and eastern African hominins were separated by an environmental barrier, and stable areas like the Turkana basin and southern Africa may have served as refugia for hominins.
GLOBAL AND PLANETARY CHANGE
(2022)
Article
Paleontology
Corentin Gibert, Axelle Zacai, Frederic Fluteau, Gilles Ramstein, Olivier Chavasseau, Ghislain Thiery, Antoine Souron, William Banks, Franck Guy, Doris Barboni, Pierre Sepulchre, Cecile Blondel, Gildas Merceron, Olga Otero
Summary: This study provides a coherent framework for understanding the evolutionary history and biogeographical distribution of Neogene and Pleistocene mammals in the Old World. It reveals important trends such as the synchronous emergence and fall of mammalian evolutionary faunas, the transition of biogeographical structuring between the Miocene and Pliocene, and the establishment of a Mediterranean bioregion.
Article
Anthropology
Christos Alexandros Plastiras, Ghislain Thiery, Franck Guy, Dimitris S. Kostopoulos, Vincent Lazzari, Gildas Merceron
Summary: Currently, little is known about the ecology of extinct Eurasian cercopithecids. This study examines the dental capabilities and feeding behavior of Dolichopithecus ruscinensis, an extinct colobine genus. The study suggests that D. ruscinensis had an opportunistic feeding behavior and the ability to process a wide range of foods. The findings contribute to our understanding of the dietary specialization and dispersion of early colobine taxa.
JOURNAL OF HUMAN EVOLUTION
(2022)
Article
Zoology
Anne Le Maitre, Franck Guy, Gildas Merceron, Dimitris S. Kostopoulos
Summary: Discoveries in recent decades have shown that Paradolichopithecus and Procynocephalus are important members of the Late Pliocene - Early Pleistocene mammalian faunas of Eurasia. However, their taxonomical status, phylogenetic relationships, and ecological profile are still unclear. By studying the inner ear anatomy of Paradolichopithecus, we found that it shares shape features with Macacina and Cercopithecini, indicating a probable retention of primitive morphology. Overall, its inner ear morphology is more consistent with a stem Papionini closely related to Papionina.
INTERNATIONAL JOURNAL OF PRIMATOLOGY
(2023)
Article
Multidisciplinary Sciences
G. Daver, F. Guy, H. T. Mackaye, A. Likius, J-R Boisserie, A. Moussa, L. Pallas, P. Vignaud, N. D. Clarisse
Summary: This article presents evidence of bipedal locomotion in early hominins, suggesting that they were already bipeds around 7 million years ago, but also indicating that arboreal clambering was an important part of their locomotor repertoire.
Article
Biology
J. -J. Jaeger, C. Sein, D. L. Gebo, Y. Chaimanee, M. T. Nyein, T. Z. Oo, M. M. Aung, K. Suraprasit, M. Rugbumrung, V. Lazzari, A. N. Soe, O. Chavasseau
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2020)
Review
Anthropology
Michael A. Berthaume, Vincent Lazzari, Franck Guy
EVOLUTIONARY ANTHROPOLOGY
(2020)
Meeting Abstract
Anthropology
Ghislain Thiery, Franck Guy, Vincent Lazzari, Sebastian O. Sosa
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
(2020)