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United Orthopedic Corporation Launches UTS™ Hip Stem and an Extension of its U-Motion II™ Acetabular System at the American Academy of Orthopaedic Surgeons Annual Meeting

IRVINE, Calif., March 7, 2018 – United Orthopedic Corporation, a leading international designer, manufacturer and distributor of innovative orthopedic implants and instruments, announced today, at the American Academy of Orthopaedic Surgeons Annual Meeting in New Orleans, the launch of the UTSTM (United Tri-tapered Short Stem) hip stem and an extension of the U-Motion IITM Acetabular System.

“We are committed to developing quality, innovative orthopedic products that improve patient outcomes and address the market’s needs,” said Calvin Lin, President of United Orthopedic Corporation USA. “Our unique vertically integrated manufacturing model has enabled us to launch two products which provide surgeons with more treatment options for total hip replacement. One is the UTSTM hip stem, which facilitates less invasive surgery and aids in rapid recovery. The other is a new cup and cup liner – an extension of the U-Motion IITM Acetabular System – which is designed to reduce the risk of dislocation following a total hip replacement.”

The UTSTM hip stem – ideal for the direct anterior approach for total hip replacement – is a tapered wedge short stem suitable for less invasive primary hip replacement surgery. It is designed for easier insertion through small incisions and requires simpler femoral preparation, enabling rapid recovery. Shorter stems preserve bone, which allows for more favorable conditions in future revisionsi. The UTSTM hip stem is available in 14 refined proximal sizes. Its features include:

  • Standard and high offset options for restoring joint biomechanics
  • Triple taper design with Titanium Plasma coating that provides initial fixation and enhances rotation stability
  • Reduced lateral shoulder designed to conserve bone in the greater trochanter


The demand for primary total hip arthroplasties is estimated to grow by 174% to 572,000 by 2030, while the demand for hip revisions is projected to double by 2026. Dislocation continues to be one of the most common causes of failure after primary and revision total hip arthroplasty. Clinical studies show large femoral heads decrease the incidence of dislocation after total hip arthroplasty.

The extension of the U-Motion IITM Acetabular System for total hip replacement surgery includes a 50mm acetabular cup and cup liner, which is compatible with the 36mm BIOLOX® delta ceramic and CoCrMo metal femoral heads. The pole thickness of the liner is 5.3mm, which is greater than ISO 21315’s requirement of 5mm to reduce the risk of breakage. The 36mm femoral head with the new U-Motion IITM 50mm Acetabular cup will provide patients a greater range of motion , increase jumping distance, improve stability and lower the risk of dislocation.

About United Orthopedic Corporation

United Orthopedic Corporation (UOC) is a leading international designer, manufacturer, and distributor of innovative, regulatory compliant orthopedic implants and instrument sets used by surgeons around the globe. Our offering includes a flexible range of clinically proven solutions used to perform total hip/knee replacements and revisions, plus clinical education, service and support for surgeons and hospital staff. UOC operates Quality Management Systems (QMS) that comply with ISO 9001/13485, FDA, and CE requirements. For more information about United Orthopedic Corporation, visit

Media Contact:

Tiffany Lin
Tel: +1 949-328-3366

i Molli RG,et al. A Short Tapered Stem Reduces Intraoperative Complications in Primary Total Hip Arthroplasty. Clin Orthop Relat Res. 2012 Feb;470(2):450-61.

ii Kurtz, et al. Projections of primary and revision hip and knee arthroplasty in the United States from 2005 to 2030. J Bone Joint Surg Am. 2007 Apr;89(4):780-5.

iiiHowie, et al. Large femoral heads decrease the incidence of dislocation after total hip arthroplasty: a randomized controlled trial. J Bone Joint Surg Am. 2012 Jun 20;94(12):1095-102. doi: 10.2106/JBJS.K.00570.

ivGuyen O. Constrained liners, dual mobility or large diameter heads to avoid dislocation in THA. EFORT Open Reviews. 2016;1(5):197-204. doi:10.1302/2058-5241.1.000054.

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