DOI QR코드

DOI QR Code

Computed tomographic features of the temporomandibular joint in 10 Jeju horses

  • Lee, Seyoung (Department of Veterinary, College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University) ;
  • Lee, Eun-Bee (Department of Veterinary, College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University) ;
  • Park, Kyung-Won (Department of Veterinary, College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University) ;
  • Jeong, Hyohoon (Department of Veterinary, College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University) ;
  • Shin, Kwang-Yun (Institute for Livestock Promotion, Jeju-Special Self-Governing Province) ;
  • Kweon, Young-Park (Institute for Livestock Promotion, Jeju-Special Self-Governing Province) ;
  • Seo, Jong-pil (Department of Veterinary, College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University)
  • Received : 2022.01.05
  • Accepted : 2022.02.28
  • Published : 2022.05.31

Abstract

Background: The equine temporomandibular joint (TMJ) has a complex anatomical structure that makes diagnosis of TMJ disorders difficult. Computed tomography (CT) is now available in equine medicine; hence, TMJ evaluation has become more convenient. Objectives: The objectives of this study were to describe the CT features of the TMJ in Jeju horses and to compare these features with those of Thoroughbreds. Methods: In this report, the TMJs of 10 Jeju horses (mean age: 4.5 ± 1.9 yr; mean body weight: 282.6 ± 40.3 kg) and 6 Thoroughbreds (mean age: 7.3 ± 1.6 yr; mean body weight: 479.7 ± 44.0 kg) were examined using CT. After CT scanning, the Hounsfield units (HU) and height to width ratio (H:W) of the mandibular condyle were measured. Results: The mean H:W in Jeju horses was significantly lower than that in Thoroughbreds. The mean HU in Jeju horses was lower than that in Thoroughbreds; however, the difference was not significant. The most frequent CT finding was an irregular medial margin of the mandibular condyle in both breeds. Conclusions: In this study, the shape of the mandibular condyle in Jeju horses was flatter than that in Thoroughbreds. This report could be useful in evaluating the TMJ in Jeju horses. Moreover, CT could be a pragmatic choice for the examination of the TMJ in horses.

Keywords

Acknowledgement

The authors would like to appreciate to staffs in Jeju National University Equine Hospital and Institute for Livestock Promotion, Jeju-Special Self-Governing Province who helped the process of computed tomography scanning without accidents, and Editage (www.editage. co.kr) for English language-editing.

References

  1. Carmalt JL. Equine temporomandibular joint (TMJ) disease: fact or fiction? Equine Vet Educ. 2014;26(2):64-65. https://doi.org/10.1111/eve.12103
  2. Barnett TP, Powell SE, Head MJ, Marr WN, Steven WN, Payne RJ. Partial mandibular condylectomy and temporal bone resection for chronic, destructive, septic arthritis of the temporomandibular joint in a horse. Equine Vet Educ. 2014;26(2):59-63. https://doi.org/10.1111/eve.12053
  3. Carmalt JL, Wilson DG. Arthroscopic treatment of temporomandibular joint sepsis in a horse. Vet Surg. 2005;34(1):55-58. https://doi.org/10.1111/j.1532-950x.2005.00010.x
  4. Elzer EJ, Wulster KB, Richardson DW, Ortved KF. Standing arthroscopic treatment of temporomandibular joint sepsis in a horse. J Vet Dent. 2020;37(2):94-99. https://doi.org/10.1177/0898756420948269
  5. Nagy AD, Simhofer H. Mandibular condylectomy and meniscectomy for the treatment of septic temporomandibular joint arthritis in a horse. Vet Surg. 2006;35(7):663-668. https://doi.org/10.1111/j.1532-950X.2006.00205.x
  6. Warmerdam EP, Klein WR, van Herpen BP. Infectious temporomandibular joint disease in the horse: computed tomographic diagnosis and treatment of two cases. Vet Rec. 1997;141(7):172-174. https://doi.org/10.1136/vr.141.7.172
  7. Ramzan PH, Marr CM, Meehan J, Thompson A. Novel oblique radiographic projection of the temporomandibular articulation of horses. Vet Rec. 2008;162(22):714-716. https://doi.org/10.1136/vr.162.22.714
  8. Butler JA, Colles CM, Dyson SJ, Kold SE, Poulos PW. The head. In: Butler JA, Colles CM, Dyson SJ, Kold SE, Poulos PW, editors. Clinical Radiology of the Horse. 4th ed. Hoboken: Wiley-Blackwell; 2017, 449-530.
  9. Rodriguez MJ, Soler M, Latorre R, Gil F, Agut A. Ultrasonographic anatomy of the temporomandibular joint in healthy pure-bred Spanish horses. Vet Radiol Ultrasound. 2007;48(2):149-154. https://doi.org/10.1111/j.1740-8261.2007.00223.x
  10. May KA, Moll HD, Howard RD, Pleasant RS, Gregg JM. Arthroscopic anatomy of the equine temporomandibular joint. Vet Surg. 2001;30(6):564-571. https://doi.org/10.1053/jvet.2001.28438
  11. Rodriguez MJ, Agut A, Soler M, Lopez-Albors O, Arredondo J, Querol M, et al. Magnetic resonance imaging of the equine temporomandibular joint anatomy. Equine Vet J. 2010;42(3):200-207. https://doi.org/10.1111/j.2042-3306.2010.00030.x
  12. Rodriguez MJ, Latorre R, Lopez-Albors O, Soler M, Aguirre C, Vazquez JM, et al. Computed tomographic anatomy of the temporomandibular joint in the young horse. Equine Vet J. 2008;40(6):566-571. https://doi.org/10.2746/042516408X322166
  13. Carmalt JL, Kneissl S, Rawlinson JE, Zwick T, Zekas L, Ohlerth S, et al. Computed tomographic appearance of the temporomandibular joint in 1018 asymptomatic horses: a multi-institution study. Vet Radiol Ultrasound. 2016;57(3):237-245. https://doi.org/10.1111/vru.12334
  14. Jorgensen E, Christophersen MT, Kristoffersen M, Puchalski P, Verwilghen D. Does temporomandibular joint pathology affect performance in an equine athlete? Equine Vet Educ. 2015;27(3):126-130. https://doi.org/10.1111/eve.12268
  15. Smyth T, Allen AL, Carmalt JL. Clinically significant, non traumatic, degenerative joint disease of the temporomandibular joint in a horse. Equine Vet Educ. 2017;29(2):72-77. https://doi.org/10.1111/eve.12382
  16. Oh WY, Kim BW, Cho HW, Shin TS, Cho SK, Cho BW. Analysis of associated race performance and functional characterization of conformation in Jeju horse. J Agric Life Sci. 2014;48(1):99-106. https://doi.org/10.14397/jals.2014.48.1.99
  17. Kong HS, Lee HK, Park KD, Choi BW. A breed comparison on the finishing times of racehorses. J Anim Sci Technol. 2011;53(1):23-27. https://doi.org/10.5187/JAST.2011.53.1.23
  18. Khummuang S, Lee HG, Joo SS, Park JW, Choi JY, Oh JH, et al. Comparison for immunophysiological responses of Jeju and Thoroughbred horses after exercise. Asian-Australas J Anim Sci. 2020;33(3):424-435. https://doi.org/10.5713/ajas.19.0260
  19. Yoon SH, Kim J, Shin D, Cho S, Kwak W, Lee HK, et al. Complete mitochondrial genome sequences of Korean native horse from Jeju Island: uncovering the spatio-temporal dynamics. Mol Biol Rep. 2017;44(2):233-242. https://doi.org/10.1007/s11033-017-4101-8
  20. Boeddinghaus R, Whyte A. Computed tomography of the temporomandibular joint. J Med Imaging Radiat Oncol. 2013;57(4):448-454. https://doi.org/10.1111/1754-9485.12021
  21. Arzi B, Cissell DD, Verstraete FJ, Kass PH, DuRaine GD, Athanasiou KA. Computed tomographic findings in dogs and cats with temporomandibular joint disorders: 58 cases (2006-2011). J Am Vet Med Assoc. 2013;242(1):69-75. https://doi.org/10.2460/javma.242.1.69
  22. Saunders J, Schwarz T. Principles of CT image interpretation. In: Schwarz T, Saunders J, editors. Veterinary Computed Tomography. 1st ed. Hoboken: Wiley-Blackwell; 2011, 29-34.
  23. Guralnick W, Kaban LB, Merrill RG. Temporomandibular-joint afflictions. N Engl J Med. 1978;299(3):123-9. https://doi.org/10.1056/NEJM197807202990304
  24. Tanaka E, Detamore MS, Mercuri LG. Degenerative disorders of the temporomandibular joint: etiology, diagnosis, and treatment. J Dent Res. 2008;87(4):296-307. https://doi.org/10.1177/154405910808700406