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Updated: Jun 12, 2026
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Establishment and Evaluation of a Sheep Model of Full-thickness Osteochondral Defect
Published on: April 14, 2026
Osteopenia in the maxillofacial area: a study in sheep
E Veigel1, R J Moore, M R Zarrinkalam
1Albert-Ludwigs-Universität, Hugstetterstrasse 55, 79106 Freiburg, Germany. egleveigel@gmail.com
Summary
This study demonstrates that induced osteoporosis in sheep causes generalized bone loss, affecting both the lumbar spine and mandible. This validated animal model is suitable for further research into maxillofacial bone conditions.
Area of Science:
- Bone biology and osteoporosis research.
- Animal modeling for skeletal diseases.
- Maxillofacial traumatology and implantology.
Background:
- Osteoporosis, characterized by low bone mass and tissue deterioration, poses a significant global health challenge.
- Osteoporosis-related fractures incur substantial public health costs.
- The role of osteoporosis in the maxillofacial region is not well-established, necessitating animal models due to human research limitations.
Purpose of the Study:
- To evaluate a sheep model for generalized osteopenia.
- To assess microstructural bone changes in the maxillofacial area of sheep with induced osteoporosis.
Main Methods:
- Osteoporosis was induced in Merino sheep via ovariectomy, glucocorticoid administration, and a calcium-deficient diet.
- Bone mineral density (BMD) of the lumbar spine was measured using dual-energy X-ray absorptiometry over 12 months.
- Microcomputed tomography was used to analyze bone biopsies from the lumbar spine and mandible.
Main Results:
- Induced osteoporosis led to a progressive decrease in lumbar BMD, significantly evident by 6 months.
- Significant reductions in bone volume/tissue volume (BV/TV) were observed in both lumbar and mandibular bone.
- The mandible showed significant cortical width reduction and regional microstructural alterations.
Conclusions:
- The induced osteopenia in sheep exhibited generalized microstructural changes throughout the skeleton.
- This validated sheep model is appropriate for future investigations in the maxillofacial region.
- Findings support the relevance of osteoporosis in maxillofacial traumatology and implantology.
