BIODEGRADABLE MATERIALS IN ORTHOPEDICS

Аннотация

The application of biodegradable materials in orthopedics has revolutionized the management of bone and soft tissue injuries by offering temporary support and eliminating the need for secondary implant removal surgeries. This paper reviews the types, properties, and clinical performance of biodegradable polymers, ceramics, and composites in orthopedic applications. The advantages of biodegradability, such as reduced long-term complications and better tissue regeneration, are evaluated alongside challenges like mechanical strength limitations and degradation kinetics. Recent advances in material science, including bioactive coatings, nanocomposites, and 3D printing technologies, are also discussed. The future perspectives point toward smart biomaterials with controlled degradation profiles and biofunctional responses tailored to specific orthopedicneeds. Keywords: Biodegradable materials, orthopedics, polymers, bone regeneration, implant degradation, bioresorbable scaffolds, composite biomaterials, biodegradable ceramics, tissue engineering. Orthopedic surgery often relies on implants for fixation, reconstruction, or replacement of damaged tissues. Traditionally, metal implants such as titanium or stainless steel have been used due to their superior mechanical properties. However, their long-term presence can lead to complications like stress shielding, chronic inflammation, infection, and the need for a second surgery to remove the implant. Biodegradable materials present a promising alternative, offering temporary mechanical support while gradually degrading and being absorbed bythebody. These materials support natural healing and eventually eliminate themselves from the site, aligning with the tissue regeneration timeline. Advances in biomaterials and tissue engineering have expanded the applications of biodegradable implants in orthopedic practices such as fracture fixation, ligament and tendon repair, and bone defect scaffolding. This article explores the properties, classifications, applications, and future prospects of biodegradable materials inorthopedics. Biodegradable materials used in orthopedics can be broadly classified into three main categories: polymers, ceramics, and composites. Each group has distinct chemical properties, biological interactions, and mechanical characteristics that determine their suitability for specific clinical applications. Biodegradable materials can bebroadly classified into: Material Common Examples Features Typical Applications Type Tunable degradation, Sutures, pins, screws, Polymers PLA, PGA, PLGA, PCL flexibleprocessing scaffolds Hydroxyapatite, Osteoconductive, brittle, Bone void fillers, Ceramics TricalciumPhosphate bioactive coatings Polymer-ceramic hybrids, Enhanced mechanical and Load-bearing Composites nanocomposites biological properties implants, 3D page222 INTERNATIONAL JOURNAL OF ARTIFICIAL INTELLIGENCE ISSN:2692-5206,ImpactFactor:12,23 AmericanAcademicpublishers,volume05,issue05,2025 Journal: https://www.academicpublishers.org/journals/index.php/ijai Material Common Examples Features Typical Applications Type scaffolds Polymers such as polylactic acid (PLA), polyglycolic acid (PGA), poly(lactic-co-glycolic acid) (PLGA), and polycaprolactone (PCL) are widely used in orthopedic practice due to their tunable degradation rates and flexibility in processing. These synthetic polymers can be engineered to degrade over specific timeframes, aligning with the healing process of various tissues. Their biocompatibility and moldability make them ideal for fabricating sutures, interference screws, pins, and scaffolds. However, one limitation of polymer-based implants is that their degradation can produce acidic byproducts, which may cause localized inflammatory responses ifnotbuffered effectively. Ceramics, particularly calcium phosphate-based materials like hydroxyapatite (HA) and tricalcium phosphate (TCP), are valued for their excellent osteoconductivity and bioactivity. These materials facilitate bone growth and integration due to their chemical similarity to natural bone mineral. However, they are inherently brittle and lack sufficient mechanical strength for use in load-bearing applications without reinforcement. Therefore, ceramic materials are primarily used as bone void fillers or as coatings on metallic implants to enhance osseointegration. Composites represent a hybrid approach, combining theadvantages of polymers andceramics. For example, polymer-ceramic composites such as PLGA reinforced with hydroxyapatite or PCL combined with bioactive nanoparticles are developed to achieve both bioactivity and mechanical strength. These materials exhibit enhanced biological interaction and structural performance, making them suitable for more demanding orthopedic applications, such as load-bearing implants and complex three-dimensional scaffolds used in bone tissue engineering. The synergy between the polymer matrix and the ceramic filler allows for better control ov