Titanium Alloy Intramedullary Nails and Plates Affect Serum Metal Ion Levels within the Fracture Healing Period

• Published in: Biological trace element research 2020-07, Vol.196 (1), p.60-65
• Main Authors: Tanoğlu, Oğuzhan, Say, Ferhat, Yücens, Mehmet, Alemdaroğlu, Kadir Bahadır, İltar, Serkan, Aydoğan, Nevres Hürriyet
• Format: Article
• Language: English
• Subjects: Adult; Alloys - analysis; Aluminium; Aluminum; Biochemistry; Biocompatibility; Biomedical and Life Sciences; Biomedical materials; Biotechnology; Bone healing; Bone implants; Bone-implant interfaces; Cohort Studies; Female; Fixation; Fracture Fixation, Internal - adverse effects; Fracture Fixation, Intramedullary - adverse effects; Fracture Healing; Fractures; Healing; Humans; In vivo methods and tests; Intramedullary nails; Ions; Levels; Life Sciences; Male; Metal ions; Metals; Metals, Heavy - blood; Middle Aged; Molybdenum; Nutrition; Oncology; Osteosynthesis; Plates; Prospective Studies; Serum; Statistical analysis; Statistical significance; Surgical implants; Titanium; Titanium alloys; Titanium base alloys; Transplants & implants; Vanadium
• ISSN: 0163-4984; 1559-0720
• DOI: 10.1007/s12011-019-01913-1

Titanium alloy implants are the most used materials for the fixation of lower extremity fractures. Although these implants were thought to be inert materials in vitro, several studies have shown increased serum and remote tissue metal ion levels due to wear of implants and friction of the bone-implant interface in vivo. The aim of this study was to investigate the alteration of serum metal ion levels that are released from intramedullary nails and plates used for the fixation of lower extremity fractures, within the fracture healing period. The study included 20 adult patients, who were treated with intramedullary nail or plate osteosynthesis due to closed lower extremity fractures. Alterations of serum titanium, aluminum, molybdenum, and vanadium levels were evaluated at 6, 12, 18, and 24 weeks postoperatively. A statistically significant increase was determined in serum titanium, aluminum, molybdenum, and vanadium ion levels in the intramedullary nail and plate groups at the end of the follow-up period. Pairwise comparisons of metal ion levels between implant groups revealed no significant difference during a 24-week follow-up period. Compared to the control group, statistically significant increased levels of serum titanium, aluminum, vanadium, and molybdenum ions were determined in the implant groups used for the fixation of lower extremity fractures at the end of 24 weeks. In the current literature, the potential toxic effects of prolonged exposure to low levels of these metal ions are still unknown. It can be predicted that long-term metal ion exposure could result in vivo pathological processes in the future.