Metallosis on Tissues and Serum Metal Levels in Children

Mayo Clinic

Status

Invitation-only

Conditions

Orthopedic Disorder

Retained Metal Implant

Study type

Observational

Funder types

Other

Identifiers

NCT03359109

17-004970

Details and patient eligibility

About

Slightly elevated blood metal levels have been found in adults undergoing hip and knee replacement. It is unknown whether pediatric patients with metal implant(plates/screws/rods) have elevated blood metal levels. This may have an impact on practice if children have high blood metal levels with routine orthopedic implants. If researchers find elevated metal levels, they may recommend patients to have the plates removed or may switch to a different type of metal. Further work on this topic is needed.

Full description

Metal implants are routinely placed in children for treatment of fracture or deformity. Long-term effects of indwelling metal implants are not well-understood. Data from this study will provide guidances as to whether some metals are safer for children (stainless vs. titanium alloys). In addition, we will document the presence of serum ion concentration for children with metal implants in place and whether this resolves after implant removal. Tissues adjacent to implants will be evaluated for signs of metallosis and wear debris. Presence of metallosis will be correlated with serum ion concentration. In vivo studies will provide data on whether metal exposure to bone cells and fibroblasts affects their inflammatory cascade and function. Based on these findings, surgeons can better counsel patients whether routine implant removal is advisable or whether stainless steel implants are safer for long-term retention compared to titanium implants. Further, novel drug targets for treatment and prevention of metallosis will be developed. This project will foster collaboration and future partnerships between the Sanford Health and Mayo Clinic research teams

Enrollment

50 estimated patients

Sex

All

Ages

4 to 18 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Ages 4 years - 18 years
Stainless steel, titanium or titanium-alloy based implants, scheduled for surgery
De novo surgery where titanium implant placement

Exclusion criteria