Three-dimensional anatomy of equine incisors : tooth length, enamel cover and age related changes

dc.contributor.authorSchrock, Patricia
dc.contributor.authorLupke, Matthias
dc.contributor.authorSeifert, Hermann
dc.contributor.authorStaszyk, Carsten
dc.date.accessioned2022-11-18T09:50:25Z
dc.date.available2014-01-03T08:51:19Z
dc.date.available2022-11-18T09:50:25Z
dc.date.issued2013
dc.description.abstractBACKGROUND:Equine incisors are subjected to continuous occlusal wear causing multiple, age related changes of the extragingival crown. It is assumed that the occlusal wear is compensated by continued tooth elongation at the apical ends of the teeth. In this study, muCT-datasets offered the opportunity to analyze the three-dimensional appearance of the extra- and intraalveolar parts of the enamel containing dental crown as well as of the enamel-free dental root. Multiple morphometric measurements elucidated age related, morphological changes within the intraalveolar part of the incisors. RESULTS:Equine incisors possess a unique enamel cover displaying large indentations on the mesial and distal sides. After eruption tooth elongation at the apical end outbalances occlusal wear for two to four years resulting in increasing incisor length in this period of time. Remarkably, this maximum length is maintained for about ten years, up to a tooth age of 13 to 15years post eruption. Variances in the total length of individual teeth are related to different Triadan positions (central-, middle- and corner incisors) as well as to the upper and lower arcades. CONCLUSION:Equine incisors are able to fully compensate occlusal wear for a limited period of time. However, after this ability ceases, it is expected that a diminished intraalveolar tooth length will cause massive changes in periodontal biomechanics. The time point of these morphodynamic and biomechanical changes (13 to 15years post eruption) occurs in coincidence with the onset of a recently described destructive disease of equine incisor (equine odontoclastic tooth resorption and hypercementosis) in aged horses. However, further biomechanical, cell biological and microbiological investigations are needed to elucidate a correlation between age related changes of incisor morphology and this disease.en
dc.identifier.urihttp://nbn-resolving.de/urn:nbn:de:hebis:26-opus-105296
dc.identifier.urihttps://jlupub.ub.uni-giessen.de//handle/jlupub/9043
dc.identifier.urihttp://dx.doi.org/10.22029/jlupub-8431
dc.language.isoende_DE
dc.rightsNamensnennung 3.0 International*
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/*
dc.subjecttoothen
dc.subjecthorseen
dc.subjectenamelen
dc.subjectdentinen
dc.subjectincisoren
dc.subjectEOTRHen
dc.subject.ddcddc:630de_DE
dc.titleThree-dimensional anatomy of equine incisors : tooth length, enamel cover and age related changesen
dc.typearticlede_DE
local.affiliationFB 10 - Veterinärmedizinde_DE
local.opus.fachgebietVeterinärmedizinde_DE
local.opus.id10529
local.source.freetextBMC Veterinary Research 9(1):249de_DE
local.source.urihttps://doi.org/10.1186/1746-6148-9-249

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