RT Journal Article
T1 Ectopic maxillary third molar in Early Pleistocene Homo antecessor from Atapuerca‐Gran Dolina site (Burgos, Spain)
A1 Martín Francés, Laura
A1 Martinón Torres, María
A1 Martínez de Pinillos, Marina
A1 Bayle, Priscilla
A1 Fernández Colón, Pilar
A1 García Campos, Cecilia
A1 Modesto Mata, Mario
A1 Carbonell i Roura, Eudald
A1 Arsuaga Ferreras, Juan Luis
A1 Bermúdez de Castro, José María
AB ObjectivesHere we describe the case of an ectopic maxillary third molar (M3), preventing the eruption of the M2, in the individual H3 of the hominin hypodigm of level TD6.2 of the Early Pleistocene site of Gran Dolina (Sierra de Atapuerca, Spain).Materials and MethodsThe fossil remains from the TD6.2 level of the Gran Dolina site (about 170 specimens) are assigned to Homo antecessor. Different geochronological methods place these hominins in the oxygen isotopic stage 21, between 0.8 and 0.85 million years ago (Ma). The immature individual H3 is represented by an almost complete midface (ATD6‐69), preserving various teeth in situ. We used high‐resolution microtomograhy (mCT) to investigate the abnormal position of the left M3, virtually reconstruct M2, and M3 as well as assessing the development stage of these. Finally, we compare this case with extinct and extant populations.ResultsBased on the identified signs, we suggest that individual H3 suffered from a unilateral impaction of the M2 as a result of the ectopic position of the developing M3.DiscussionWe conclude that the most likely etiology for the ectopic position of the M3 is the lack of space in the maxilla. We discuss possible contributing factors, such as morphometric aspects of the maxilla and the early mineralization of the M3, to support the M2 impaction. Finally, due to the early age at death of this individual we did not identify any secondary lesion associated with the M2 impaction.
PB Wiley
SN 0002-9483, ESSN: 1096-8644
YR 2020
FD 2020-04
LK https://hdl.handle.net/20.500.14352/6263
UL https://hdl.handle.net/20.500.14352/6263
LA eng
NO Ministerio de Ciencia e Innovación (MICINN)
NO Junta de Castilla y León
NO Programme Initiative d’Excellence (IdEx) Bordeaux,
DS Docta Complutense
RD 6 abr 2025