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Why must pores in bone-growth implants be interconnected and larger than 100 micrometres?

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Steps in doctor blading, a tape-casting process employed in the production of ceramic films. Ceramic powder and solvent are mixed to form a slurry, which is treated with various additives and binders, homogenized, and then pumped directly to a tape-casting machine. There the slurry is continuously cast onto the surface of a moving carrier film. The edge of a smooth knife, generally called a doctor blade, spreads the slurry onto the carrier film at a specified thickness, thereby generating a flexible tape. Heat lamps gently evaporate the solvent, and the dry tape is peeled away from the carrier film and rolled onto a take-up reel for additional processing.
advanced ceramics Steps in doctor blading, a tape-casting process employed in the production of ceramic films. Ceramic powder and solvent are mixed to form a slurry, which is treated with various additives and binders, homogenized, and then pumped directly to a tape-casting machine. There the slurry is continuously cast onto the surface of a moving carrier film. The edge of a smooth knife, generally called a doctor blade, spreads the slurry onto the carrier film at a specified thickness, thereby generating a flexible tape. Heat lamps gently evaporate the solvent, and the dry tape is peeled away from the carrier film and rolled onto a take-up reel for additional processing.

In the field of bioceramics, porous implants are designed to serve as scaffolds that support the integration of new tissue into the body.

For these implants to be effective, the pores must be interconnected and exceed 100 micrometres in size. This specific structural requirement is essential because it allows bone tissue to grow directly into the pore channels while ensuring the tissue maintains its necessary vascularity (blood supply). When these conditions are met, the bone growth acts as a reinforcing phase, helping to stabilize the implant in areas subjected to low mechanical loading.1