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Home / Equine Research Bank / Animals (Basel) / The Frequency of Errors in Determining Age Based on Selected...
Animals : an open access journal from MDPI2019; 9(6); doi: 10.3390/ani9060298

The Frequency of Errors in Determining Age Based on Selected Features of the Incisors of Icelandic Horses.

Abstract: The structure and changes occurring to horses' teeth during ontogeny are not only used to assess the degree of somatic maturity but also the development of universal patterns and is therefore used to determine the age of horses. Research shows that methods of assessing the age of horses based on the appearance of teeth tend to suffer from relatively large errors. This is probably influenced by the results of intensive selection and being kept in living conditions that differ substantially from their natural environment. This study aimed to assess the suitability of selected features of the incisors to determine the age of Icelandic horses. One hundred and twenty-six Icelandic horses (78 mares and 48 stallions) of different ages (range: 0-24 years; groups: 0-2 years, >2-5 years, >5-11 years, and >11 years) were examined by an experienced horse person who was blinded to the actual age of the horse and did not know which age group horses were in. Age was determined by the inspection of each horse's teeth and was compared to the actual age of the horse recorded in the breeding documentation, and the percentage of mistakes made regarding the age group was calculated. The estimated age did not match the real age in 36.5% of the horses. The age was more often underestimated (19.0%) by, on average, 0.9 ± 1.0 years than overestimated (17.5%) by, on average, 1.3 ± 1.4 years. Within age groups, the least number of errors in determining age were made in young horses aged 0-2 years, when the eruption and growing of the deciduous incisors and the disappearance of the cups was considered. The average percentage of errors in this group (2.1%) was significantly lower (p < 0.01) than for older horses, whose age was estimated based on the exchange of deciduous to permanent teeth (55.8%), disappearance of the cups (68.0%), and shape changes on the grinding surface (40.0%). Significantly more frequent underestimation of age based on replacing deciduous for permanent incisors and significantly more frequent overestimation of age on the basis of the disappearance of the cup may indicate that Icelandic horses up to 5 years of age are characterized by a slower rate of growth than horses of other breeds, especially warmblood horses. These results suggest that patterns used to determine the real age of horses based on changes occurring on the incisors should be modified in order to consider the specificity of the course of growth and maturation processes of horses of various types and breeds.
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Publication Date: 2019-05-30 PubMed ID: 31151265PubMed Central: PMC6617252DOI: 10.3390/ani9060298Google Scholar: Lookup
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  • Journal Article

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The study evaluates the accuracy of estimating a horse’s age based on their teeth, specifically focusing on Icelandic horses. It found that such estimations often deviate from the actual age, with age often being underestimated or overestimated.

Objective of the Study

  • The research was conducted to assess the accuracy of determining a horse’s age based on the physical features of their incisors. Icelandic horses were the focus of the study.

Methodology

  • The study involved 126 Icelandic horses of varying ages, divided into four age groups.
  • An experienced horse person, unaware of the horses’ actual ages, examined each horse’s teeth and estimated their age.
  • The estimated ages were then compared to the actual ages documented in the horse’s breeding documentation.

Findings

  • The study found that around 36.5% of the age estimates were not accurate.
  • The ages were more frequently underestimated (at 19.0%) than overestimated (at 17.5%).
  • The least number of estimation errors were made within the 0-2 years age group.
  • The study also found that there was a higher frequency of underestimation of age when the method considered replacing of deciduous for permanent incisors. Overestimation, on the other hand, was more common when the disappearance of the “cup” in the incisor was used as a basis for age.

Implications and Recommendations

  • The study suggests that Icelandic horses may have a slower growth rate up to the age of 5 compared to other breeds. This could explain the higher frequency of underestimations.
  • The researchers recommend reconsidering the patterns used to determine a horse’s age by taking into account the specific growth and maturation processes of different horse types and breeds.

Cite This Article

APA
Łuszczyński J, Pieszka M, Petrych W, Stefaniuk-Szmukier M. (2019). The Frequency of Errors in Determining Age Based on Selected Features of the Incisors of Icelandic Horses. Animals (Basel), 9(6). https://doi.org/10.3390/ani9060298

Publication

Animals : an open access journal from MDPI
ISSN: 2076-2615
NlmUniqueID: 101635614
Country: Switzerland
Language: English
Volume: 9
Issue: 6

Researcher Affiliations

Łuszczyński, Jarosław
  • Department of Horse Breeding, Institute of Animal Science, Agricultural University, Al. Mickiewicza 24/28, 30-059 Cracow, Poland. jaroslaw.luszczynski@urk.edu.pl.
Pieszka, Magdalena
  • Department of Horse Breeding, Institute of Animal Science, Agricultural University, Al. Mickiewicza 24/28, 30-059 Cracow, Poland. magdalena.pieszka@urk.edu.pl.
Petrych, Weronika
  • Department of Horse Breeding, Institute of Animal Science, Agricultural University, Al. Mickiewicza 24/28, 30-059 Cracow, Poland. punktur.weronika@gmail.com.
Stefaniuk-Szmukier, Monika
  • Department of Horse Breeding, Institute of Animal Science, Agricultural University, Al. Mickiewicza 24/28, 30-059 Cracow, Poland. monika.stefaniuk-szmukier@urk.edu.pl.

Grant Funding

  • 3257/ZHK/2018 / Ministry of Science and Higher Education of the Republic of Poland

Conflict of Interest Statement

The authors declare no conflict of interest. The sponsors had no role in the design, execution, interpretation, or writing of the study.

References

This article includes 38 references
  1. Aðalsteinsson S. Origin and conservation of farm animal populations in Iceland. J. Anim. Breed. Genet. 1981;98:258–264.
    doi: 10.1111/j.1439-0388.1981.tb00349.xgoogle scholar: lookup
  2. Björnsson G.B., Sveinsson H.J.. The Icelandic Horse. Mal og Menning; Reykjavik, Iceland: 2004. Íslenski hesturinn; p. 415.
  3. Bjørnstad G., Nilsen N.O., Røed K.H.. Genetic relationship between Mongolian and Norwegian horses?. Anim. Genet. 2003;34:55–58.
    doi: 10.1046/j.1365-2052.2003.00922.xpubmed: 12580788google scholar: lookup
  4. Bjørnstad G., Røed K.H.. Breed demarcation and potential for breed allocation of horses assessed by microsatellite markers. Anim. Genet. 2001;32:59–65.
    doi: 10.1046/j.1365-2052.2001.00705.xpubmed: 11421939google scholar: lookup
  5. Czerwiński B. Islandia wyspa żywiołów i wikingów. [Iceland is an island of elements and Vikings]. Aurora 2002;9:24–25.
  6. Hreidarsdóttir G., Árnason T., Svansson V., Hallson J. Analysis of the history and population structure of the Icelandic horse using pedigree data and DNA analyses. Icel. Agric. Sci. 2014;27:63–79.
  7. Muylle S., Simoens P., Lauwers H. Age-related morphometry of equine incisors. Zentralbl. Veterinarmed. A. 1999;46:633–643.
    doi: 10.1046/j.1439-0442.1999.00261.xpubmed: 10638301google scholar: lookup
  8. Vollmerhaus B., Roos H., Knospe C. The origin and function of the enamel cup, infundibulum dentis, on the incisors of the horse. Anat. Histol. Embryol. 2002;31:53–59.
    doi: 10.1046/j.1439-0264.2002.00354.xpubmed: 11841357google scholar: lookup
  9. Schrock P., Lüpke M., Seifert H., Staszyk C. Three-dimensional anatomy of equine incisors: Tooth length, enamel cover and age related changes. BMC Vet. Res. 2013;9:249.
    doi: 10.1186/1746-6148-9-249pmc: PMC3878928pubmed: 24321365google scholar: lookup
  10. Łuszczyński J., Pieszka M., Długosz B., Plucińska N. Porównanie zmian zachodzących na zębach siecznych koni czystej krwi arabskiej i angloarabskich [Comparison of changes on the incisors of Arabian and Anglo-Arabian horses]. Med. Wet. 2015;71:782–786.
  11. Muylle S., Simoens P., Lauwers H., Van Loon G. Age determination in mini-Shetland ponies and donkeys. Zentralbl. Veterinarmed. A. 1999;46:421–429.
    doi: 10.1046/j.1439-0442.1999.00229.xpubmed: 10528536google scholar: lookup
  12. Stachurska A., Szymańska A., Peckiel P., Kujawska G., Stasiowski A., Jaworski Z. The Instruction for Written and Graphical Descriptions of Horses and Donkeys. PZHK; Warszawa, Poland: 2017. Identyfikacja koni i osłów. Instrukcja sporządzania opisu słownego i graficznego koni i osłów.
  13. Walmsley J.P.. Some observations on the value of ageing 5-7-year-old horses by examination of their incisor teeth. Equine Vet. Educ. 1993;5:295–298.
    doi: 10.1111/j.2042-3292.1993.tb01056.xgoogle scholar: lookup
  14. Richardson J.D., Lane J.G., Waldron K.R.. Is dentition an accurate indication of the age of a horse?. Vet. Rec. 1994;135:31–34.
    doi: 10.1136/vr.135.2.31pubmed: 7975071google scholar: lookup
  15. Richardson J.D., Cripps P.J., Hillyer M.H., O’Brien J.K., Pinsent P.J., Lane J.G.. An evaluation of the accuracy of ageing horses by their dentition: A matter of experience?. Vet. Rec. 1995;137:88–90.
    doi: 10.1136/vr.137.4.88pubmed: 8533248google scholar: lookup
  16. Muylle S., Simoens P., Lauwers H., Van Loon G. Ageing draft and trotter horses by their dentition. Vet. Rec. 1997;141:17–20.
    doi: 10.1136/vr.141.1.17pubmed: 9248018google scholar: lookup
  17. Muylle S., Simoens P., Lauwers H., Van Loon G. Ageing Arab horses by their dentition. Vet. Rec. 1998;142:659–662.
    doi: 10.1136/vr.142.24.659pubmed: 9670444google scholar: lookup
  18. Friker J., Dias D.P., Zeiler E. Breed-based differences in age determination in Thoroughbred, Arab, Trotter and Belgian Draft. Wien. Tierarztl. Monat. 2006;93:218–225.
  19. Nicks B., Delfontaine B., Claveau C., Ferrari S., Canart B., Vandenheede M. Accuracy of ageing horses by their dentition: Results of a study on Belgian draft mares. Ann. Med. Vet. 2007;151:6–14.
  20. Gáspárdy A., Rieden S., Simonyi Z., Szemere B., Bodó I. Characterization of age dependent alterations of the cup of the incisor on the basis of data from Hungarian and German horses. Berl. Munch. Tierarztl. Wochenschr. 2009;122:132–139.
    pubmed: 19350813
  21. Łuszczyński J., Pieszka M. Usefulness of selected incisor characteristics for determining the age of Hucul horses. Ann. Anim. Sci. 2011;11:567–573.
    doi: 10.2478/v10220-011-0008-9google scholar: lookup
  22. Łuszczyński J., Pieszka M., Augustyn R., Długosz B., Plucińska N. The usefulness of selected characteristics of incisors to determine the age of horses. Proceedings of the International Scientific Conference “Presence and Future of Animals Science”; Cracow, Poland. 21–22 June 2012; p. 115.
  23. Hillson S. Teeth. Cambridge University Press; Cambridge, UK: 2005. p. 183.
  24. Duizer L.M., Winger R.J.. Instrumental measures of bite forces associated with crisp products. J. Texture Stud. 2006;37:1–15.
    doi: 10.1111/j.1745-4603.2006.00035.xgoogle scholar: lookup
  25. Huthmann S., Staszyk C., Jacob H.G., Rohn K., Gasse H. Biomechanical evaluation of the equine masticatory action: Calculation of the masticatory forces occurring on the cheek tooth battery. J. Biomech. 2009;42:67–70.
    doi: 10.1016/j.jbiomech.2008.09.040pubmed: 19056084google scholar: lookup
  26. Schrock P., Lüpke M., Seifert H., Borchers L., Staszyk C. Finite element analysis of equine incisor teeth. Part 1: Determination of the material parameters of the periodontal ligament. Vet. J. 2013;198:583–589.
    doi: 10.1016/j.tvjl.2013.10.009pubmed: 24220347google scholar: lookup
  27. Bonin S.J., Clayton H.M., Lanovaz J.L., Johnston T. Comparison of mandibular motion in horses chewing hay and pellets. Equine Vet. J. 2007;39:258–262.
    doi: 10.2746/042516407X157792pubmed: 17520978google scholar: lookup
  28. Lowder M.Q., Mueller P.O.. Dental embryology, anatomy, development, and aging. Vet. Clin. N. Am. Equine. 1998;14:227–245.
    doi: 10.1016/S0749-0739(17)30195-5pubmed: 9742661google scholar: lookup
  29. Muylle S., Simoens P., Lauwers H. Ageing horses by an examination of their incisor teeth: An (im) possible task?. Vet. Rec. 1996;138:295–301.
    doi: 10.1136/vr.138.13.295pubmed: 8730689google scholar: lookup
  30. Richardson J.D., Cripps P.J., Lane J.G.. An evaluation of the accuracy of ageing horses by their dentition: Changes of dental morphology with age. Vet. Rec. 1995;137:117–121.
    doi: 10.1136/vr.137.5.117pubmed: 8533255google scholar: lookup
  31. Muylle S., Simoens P., Verbeeck R., Ysebaert M.T., Lauwers H. Dental wear in horses in relation to the microhardness of enamel and dentine. Vet. Rec. 1999;144:558–561.
    doi: 10.1136/vr.144.20.558pubmed: 10371014google scholar: lookup
  32. Petelicki J. Wizyta u stomatologa. Po co koń ma zęby? [Why does a horse have teeth?]. Świat Koni 2004;4:12–17.
  33. Łuszczyński J., Pieszka M., Kosiniak-Kamysz K. Effect of horse breed and sex on growth rate and radiographic closure time of distal radial metaphyseal growth plate. Livest. Sci. 2011;141:252–258.
    doi: 10.1016/j.livsci.2011.06.009google scholar: lookup
  34. Strand E., Braathen L.C., Hellsten M.C., Huse-Olsen L., Bjornsdottir S. Radiographic closure time of appendicular growth plates in the Icelandic horse. Acta Vet. Scand. 2007;49:19–26.
    doi: 10.1186/1751-0147-49-19pmc: PMC1950711pubmed: 17640333google scholar: lookup
  35. Björnsdóttir S., Axelsson M., Eksell P., Sigurdsson H., Carlsten J. Radiographic and clinical survey of degenerative joint disease in the distal tarsal joints in Icelandic horses. Equine Vet. J. 2000;32:268–272.
    doi: 10.2746/042516400776563590pubmed: 10836484google scholar: lookup
  36. Foerner J.J.. Osteochondrosis in the horse. J. Equine Vet. Sci. 2003;23:142–145.
    doi: 10.1053/jevs.2003.42google scholar: lookup
  37. Schougaard H., Falk Ronne J., Phillipson J. A radiographic survey of tibiotarsal osteochondrosis in a selected population of trotting horses in Denmark and its possible genetic significance. Equine Vet. J. 1990;22:288–289.
    doi: 10.1111/j.2042-3306.1990.tb04270.xpubmed: 2209527google scholar: lookup
  38. Jeffcott L.B.. Osteochondrosis—An international problem for the horse industry. J. Equine Vet. Sci. 1996;16:32–37.
    doi: 10.1016/S0737-0806(96)80063-3google scholar: lookup

Citations

This article has been cited 1 times.
  1. Gudea AI, Bârcă V, Irimie A, Martonos CO, Socaciu A. La Tène Horse Remains from Alba Iulia CX 143 Complex: A Whole Story to Tell. Animals (Basel) 2024 May 30;14(11).
    doi: 10.3390/ani14111624pubmed: 38891671google scholar: lookup
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