FDA Product Code LPH: Prosthesis, Hip, Semi-constrained, Metal/polymer, Porous Uncemented

Under FDA product code LPH, semi-constrained hip prostheses with metal and polymer bearing surfaces are cleared for total hip arthroplasty.

These implants use a metal femoral head articulating against a polymer — typically ultra-high molecular weight polyethylene — acetabular liner. Metal-on-polymer is the most established bearing couple in hip replacement, with decades of clinical data supporting its performance.

LPH devices are Class II medical devices, regulated under 21 CFR 888.3358 and reviewed by the FDA Orthopedic panel.

Leading manufacturers include Zimmer, Inc., Biomet, Inc. and Smith & Nephew, Inc..