Abstract
Objectives Following comprehensive characterization of the temporomandibular joint (TMJ) of the California sea lion, as well demonstrating that TMJ-osteoarthritis (OA) occurs in this species, the objective of this part of the investigation was to describe the macroscopic osteologic findings associated with TMJ-OA in a large museum collection of skull specimens.
Design Museum skull specimens (n = 497) of California sea lions were examined macroscopically according to defined criteria for the presence, severity, location and characteristics of TMJ-OA. The specimens, acquired from strandings, varied in age from young adults to mature adults.
Results Overall 63.5% of the specimens had findings consistent with TMJ-OA. Of these, 56.2% were from females 43.8% were from males. Moreover, 71.2% specimens were from mature adults and 28.8% from young adults. However, there was no significant association between age and sex with the presence or severity of TMJ-OA. The most prominent TMJ-OA changes were the presence of subchondral bone defects and abnormal porosity. The majority of the OA present at the mandibular head affected the entire articular surface. In contrast, the OA present on the mandibular fossa of the temporal bone was located primarily on the medial aspect (P < 0.001).
Conclusion The incidence of TMJ-OA in California sea lions is high and varies in severity. Although the significance of the high incidence of this disease in the California sea lion remains elusive, the occurrence and severity of TMJ-OA detected in this study may play an important role in the species' morbidity and mortality.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 216-222 |
| Number of pages | 7 |
| Journal | Archives of Oral Biology |
| Volume | 60 |
| Issue number | 1 |
| DOIs | |
| State | Published - Oct 8 2014 |
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Keywords
- California sea lion
- Osteoarthritis
- Temporomandibular joint
- Zalophus californianus
ASJC Scopus subject areas
- Otorhinolaryngology
- Cell Biology
- Dentistry(all)
Cite this
The temporomandibular joint of California sea lions (Zalophus californianus) : Part 2-osteoarthritic changes. / Arzi, Boaz; Leale, D. M.; Sinai, N. L.; Kass, Philip H; Lin, A.; Verstraete, Frank J.
In: Archives of Oral Biology, Vol. 60, No. 1, 08.10.2014, p. 216-222.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The temporomandibular joint of California sea lions (Zalophus californianus)
T2 - Part 2-osteoarthritic changes
AU - Arzi, Boaz
AU - Leale, D. M.
AU - Sinai, N. L.
AU - Kass, Philip H
AU - Lin, A.
AU - Verstraete, Frank J
PY - 2014/10/8
Y1 - 2014/10/8
N2 - Objectives Following comprehensive characterization of the temporomandibular joint (TMJ) of the California sea lion, as well demonstrating that TMJ-osteoarthritis (OA) occurs in this species, the objective of this part of the investigation was to describe the macroscopic osteologic findings associated with TMJ-OA in a large museum collection of skull specimens.Design Museum skull specimens (n = 497) of California sea lions were examined macroscopically according to defined criteria for the presence, severity, location and characteristics of TMJ-OA. The specimens, acquired from strandings, varied in age from young adults to mature adults.Results Overall 63.5% of the specimens had findings consistent with TMJ-OA. Of these, 56.2% were from females 43.8% were from males. Moreover, 71.2% specimens were from mature adults and 28.8% from young adults. However, there was no significant association between age and sex with the presence or severity of TMJ-OA. The most prominent TMJ-OA changes were the presence of subchondral bone defects and abnormal porosity. The majority of the OA present at the mandibular head affected the entire articular surface. In contrast, the OA present on the mandibular fossa of the temporal bone was located primarily on the medial aspect (P < 0.001).Conclusion The incidence of TMJ-OA in California sea lions is high and varies in severity. Although the significance of the high incidence of this disease in the California sea lion remains elusive, the occurrence and severity of TMJ-OA detected in this study may play an important role in the species' morbidity and mortality.
AB - Objectives Following comprehensive characterization of the temporomandibular joint (TMJ) of the California sea lion, as well demonstrating that TMJ-osteoarthritis (OA) occurs in this species, the objective of this part of the investigation was to describe the macroscopic osteologic findings associated with TMJ-OA in a large museum collection of skull specimens.Design Museum skull specimens (n = 497) of California sea lions were examined macroscopically according to defined criteria for the presence, severity, location and characteristics of TMJ-OA. The specimens, acquired from strandings, varied in age from young adults to mature adults.Results Overall 63.5% of the specimens had findings consistent with TMJ-OA. Of these, 56.2% were from females 43.8% were from males. Moreover, 71.2% specimens were from mature adults and 28.8% from young adults. However, there was no significant association between age and sex with the presence or severity of TMJ-OA. The most prominent TMJ-OA changes were the presence of subchondral bone defects and abnormal porosity. The majority of the OA present at the mandibular head affected the entire articular surface. In contrast, the OA present on the mandibular fossa of the temporal bone was located primarily on the medial aspect (P < 0.001).Conclusion The incidence of TMJ-OA in California sea lions is high and varies in severity. Although the significance of the high incidence of this disease in the California sea lion remains elusive, the occurrence and severity of TMJ-OA detected in this study may play an important role in the species' morbidity and mortality.
KW - California sea lion
KW - Osteoarthritis
KW - Temporomandibular joint
KW - Zalophus californianus
UR - http://www.scopus.com/inward/record.url?scp=84909582704&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84909582704&partnerID=8YFLogxK
U2 - 10.1016/j.archoralbio.2014.09.005
DO - 10.1016/j.archoralbio.2014.09.005
M3 - Article
C2 - 25451465
AN - SCOPUS:84909582704
VL - 60
SP - 216
EP - 222
JO - Archives of Oral Biology
JF - Archives of Oral Biology
SN - 0003-9969
IS - 1
ER -