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Bioabsorbable implant as a tracheal wall substitute in young developing canines
Rosa E Soriano-Rosales1, Beatriz E Perez-Guille, Emilio Arch-Tirado
1From the *PhD Graduate Program in Biological and Health Sciences, Metropolitan Autonomous University, México City, México; †Experimental Surgery Department, National Pediatric Institute (INP), México City, México; ‡Bioacoustics Laboratory, National Rehabilitation Institute (INR), México City, México; §Surgery Department, National Autonomous University of Mexico, México City, México; ¶Imaging Department, Multicut Computerized Tomography Service, INP, México City, México; ‖Laboratory of Electronic Microscopy, INP, México City, México; and #Agricultural and Animal Production, Metropolitan Autonomous University, México City, México.
Polylactic and polyglycolic acid (PLA/PGA) implants effectively replaced short tracheal segments in young dogs. The biodegradable implants integrated with surrounding tissue, supporting normal tracheal function and growth.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Veterinary Surgery
Background:
- Tracheal defects pose significant challenges in pediatric and veterinary medicine.
- Current tracheal reconstruction methods have limitations, especially in growing patients.
- Biodegradable implants offer a promising alternative for tissue regeneration.
Purpose of the Study:
- To evaluate the efficacy of a polylactic and polyglycolic acid (PLA/PGA) implant as a partial tracheal substitute in young canines.
- To assess the long-term clinical, endoscopic, tomographic, and histomorphological outcomes of the tracheal implant.
Main Methods:
- An experimental, longitudinal study involving young canines receiving a PLA 85%/PGA 15% plaque as a partial tracheal substitute.
- Clinical, endoscopic, and tomographic assessments were performed over a 1-year follow-up period.
- Histomorphological evaluations using light and electron microscopy were conducted post-explantation.
Main Results:
- No adverse events were observed during the 1-year study period.
- Endoscopic evaluation showed complete mucosal coverage of the implant within one month, without granulation or stenosis.
- Tomographic and histomorphological analyses confirmed successful integration and biodegradation of the implant, with regeneration of pseudostratified ciliated epithelium.
Conclusions:
- PLA/PGA plaque effectively served as a functional partial tracheal substitute in young, growing canines.
- The biodegradable implant supported tracheal regeneration without compromising the recipient's growth.
- Further research is warranted for larger tracheal segment replacements and diverse developmental stages.
