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An animal model of femoral head osteonecrosis induced by a single injection of absolute alcohol: an experimental study.

Zhu ZH, Gao YS, Luo SH, Zeng BF, Zhang CQ - Med. Sci. Monit. (2011)

Bottom Line: Macrostructural and radiographic examinations revealed that the contour of both femoral heads was deformed slightly at 12 weeks, but a contour deformation with joint space narrowing was observed at 25 weeks.Histologically, a strong concordance with the natural history of ONFH in humans was found.The present model demonstrated bone trabeculae, marrow necrosis, a reconstruction deficiency and destruction of the microcirculation.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopedic Surgery, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China.

ABSTRACT

Background: The lack of an experimental animal model that can reliably mimic all stages of osteonecrosis of the femoral head has hindered progress toward the successful prevention and treatment of the disease.

Material/methods: A goat model of osteonecrosis of the femoral head (ONFH) was established and observed from the early to the intermediate-to-late stage of mechanical failure. Absolute alcohol was injected slowly into the center of bilateral femoral heads in 12 adult Small Tail Han goats. Postoperatively, the femoral heads were harvested and examined using macrostructural and histological analyses and radiographic and MRI examinations at weeks 4, 8, 12, and 25.

Results: Macrostructural and radiographic examinations revealed that the contour of both femoral heads was deformed slightly at 12 weeks, but a contour deformation with joint space narrowing was observed at 25 weeks. Histologically, a strong concordance with the natural history of ONFH in humans was found. The present model demonstrated bone trabeculae, marrow necrosis, a reconstruction deficiency and destruction of the microcirculation.

Conclusions: Among quadrupedal models, the goat model of ONFH, which is induced by a single injection of absolute alcohol, may be suitable and valuable for the evaluation of various therapeutics and side effects in the treatment of ONFH.

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(A) X-ray examination showed slight cystic degeneration in the femoral head at week 4. However, the joint space was normal for both hips. (B) X-ray examination showed the femoral heads were not so round and narrowing of hip joint at week 25, which was more obvious at left as indicated.
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f2-medscimonit-17-4-br97: (A) X-ray examination showed slight cystic degeneration in the femoral head at week 4. However, the joint space was normal for both hips. (B) X-ray examination showed the femoral heads were not so round and narrowing of hip joint at week 25, which was more obvious at left as indicated.

Mentions: At week 4, 12 experimental goats were examined, and mild cystic degeneration was detected in 20 femoral heads. At 8 weeks, the bone mineral density of the 17 femoral heads had increased locally in the 9 experimental goats. At 12 weeks, 6 experimental goats were examined, and an inhomogeneous trabecular bone density was observed in all 12 femoral heads; however, slight contour changes were found in 8 heads. At 25 weeks, the last 3 experimental goats were examined, and a local collapse and narrowing of the hip joint space was observed in 4 femoral heads (Figure 2A, B).


An animal model of femoral head osteonecrosis induced by a single injection of absolute alcohol: an experimental study.

Zhu ZH, Gao YS, Luo SH, Zeng BF, Zhang CQ - Med. Sci. Monit. (2011)

(A) X-ray examination showed slight cystic degeneration in the femoral head at week 4. However, the joint space was normal for both hips. (B) X-ray examination showed the femoral heads were not so round and narrowing of hip joint at week 25, which was more obvious at left as indicated.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3539532&req=5

f2-medscimonit-17-4-br97: (A) X-ray examination showed slight cystic degeneration in the femoral head at week 4. However, the joint space was normal for both hips. (B) X-ray examination showed the femoral heads were not so round and narrowing of hip joint at week 25, which was more obvious at left as indicated.
Mentions: At week 4, 12 experimental goats were examined, and mild cystic degeneration was detected in 20 femoral heads. At 8 weeks, the bone mineral density of the 17 femoral heads had increased locally in the 9 experimental goats. At 12 weeks, 6 experimental goats were examined, and an inhomogeneous trabecular bone density was observed in all 12 femoral heads; however, slight contour changes were found in 8 heads. At 25 weeks, the last 3 experimental goats were examined, and a local collapse and narrowing of the hip joint space was observed in 4 femoral heads (Figure 2A, B).

Bottom Line: Macrostructural and radiographic examinations revealed that the contour of both femoral heads was deformed slightly at 12 weeks, but a contour deformation with joint space narrowing was observed at 25 weeks.Histologically, a strong concordance with the natural history of ONFH in humans was found.The present model demonstrated bone trabeculae, marrow necrosis, a reconstruction deficiency and destruction of the microcirculation.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopedic Surgery, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China.

ABSTRACT

Background: The lack of an experimental animal model that can reliably mimic all stages of osteonecrosis of the femoral head has hindered progress toward the successful prevention and treatment of the disease.

Material/methods: A goat model of osteonecrosis of the femoral head (ONFH) was established and observed from the early to the intermediate-to-late stage of mechanical failure. Absolute alcohol was injected slowly into the center of bilateral femoral heads in 12 adult Small Tail Han goats. Postoperatively, the femoral heads were harvested and examined using macrostructural and histological analyses and radiographic and MRI examinations at weeks 4, 8, 12, and 25.

Results: Macrostructural and radiographic examinations revealed that the contour of both femoral heads was deformed slightly at 12 weeks, but a contour deformation with joint space narrowing was observed at 25 weeks. Histologically, a strong concordance with the natural history of ONFH in humans was found. The present model demonstrated bone trabeculae, marrow necrosis, a reconstruction deficiency and destruction of the microcirculation.

Conclusions: Among quadrupedal models, the goat model of ONFH, which is induced by a single injection of absolute alcohol, may be suitable and valuable for the evaluation of various therapeutics and side effects in the treatment of ONFH.

Show MeSH
Related in: MedlinePlus