Optimizing osteochondral decalcification and histological processing in ovine joint models

Area of Science:

• Veterinary Histology
• Biomedical Research Methodology

Background:

• Decalcification is crucial for bone and cartilage histology.
• Optimizing decalcification impacts tissue preservation and staining quality.

Purpose of the Study:

• To establish an efficient decalcification protocol for ovine stifle joint tissues.
• To optimize morphological preservation and staining performance.

Main Methods:

• Ovine stifle joint tissues were decalcified using 2% ethylenediaminetetraacetic acid (EDTA), 0.1% nitric acid, or a combination.
• Mineral removal, tissue architecture, and staining quality were evaluated.
• Histological preservation was assessed using O'Driscoll scoring criteria.

Main Results:

• 0.1% nitric acid provided the best balance of efficiency and preservation within 48 hours.
• EDTA required 5-7 days, causing progressive loss of cellular detail.
• Combined EDTA-nitric acid led to rapid decalcification but significant tissue degradation.

Conclusions:

• 0.1% nitric acid is a reliable and time-efficient protocol for ovine osteochondral tissues.
• This method enables adequate histological evaluation while preserving tissue integrity.
• Provides a practical reference for histological processing of ovine joint tissues.