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DePuy Hip Implants

As you consider hip replacement surgery, you may want to learn more about the hip implants your surgeon may be using. This article will give you an overview of hip replacement implants in general and answer a few of the questions most frequently asked by patients. In addition, you will learn about some of the hip implant stems available from DePuy Orthopaedics, Inc.

Hip Implant Basics

The hip joint consists of two main parts: a ball (femoral head) at the top of your thighbone (femur) that fits into a rounded socket (acetabulum) in your pelvis. The femoral head rotates within the curved surface of the acetabulum (figure 1). In an artificial hip, an acetabular shell replaces the acetabulum. The femoral stem is inserted into the femur and the femoral head (or ball) is fitted inside the acetabulum (figure 2). This connects the leg to the hip and allows for movement.

Healthy Hip
Figure 1
  Hip with Implant
Figure 2

What is a hip implant made of and how much does it weigh?
While hip implants are made of several different types of materials, the most common are titanium and cobalt chrome. Your surgeon will choose the implant that best fits your lifestyle, anatomy, and other needs. On average, a total hip system (stem, head, shell, and liner) weighs between 1 and 2 pounds, depending on the type of material that is used.

How long does a hip implant last?
This depends upon a number of factors, including lifestyle, activity levels, weight, and other conditions. Your surgeon will discuss these with you. (See below for results from a study of DePuy Hip Systems.)

What makes DePuy different?
DePuy Orthopaedics was the first orthopaedic company in the United States. With more than one million hip replacements from DePuy Orthopaedics in use worldwide, the company has remained a leader in hip replacement for over 40 years.1

DePuy Orthopaedics provides orthopaedic surgeons with a broad range of clinically successful hip systems. These options help orthopaedic surgeons choose hip implants that relieve hip osteoarthritis pain and restore movement, while helping patients like you move more naturally.

DePuy Hip Stems
AML Total Hip System
The AML® Total Hip System

The AML Total Hip System is designed to increase range-of-motion, and is extensively coated with Porocoat® Porous Coating to enhance stability.

  • The world’s first cementless hip implant featuring Porocoat Porous Coating, which encourages biological tissue ingrowth into the porous coating to hold it securely in place and maximize stability2
 
     
The S-ROM Modular Hip System
The S-ROM® Modular Hip System

The multiple size options of the S-ROM Modular Hip System provide more than 10,000 stem component combinations to3:

  • Allow your surgeon to tailor the stem to fit your individual anatomy4
  • Provide enhanced stability and long-term fixation to the bone4
 
     
The Summit Hip System
The Summit™ Hip System

The Summit family of femoral stems is designed to optimize the hip’s natural range of motion and restore movement.

  • Stem design with Porocoat® Porous Coating assists with essential biological tissue ingrowth into the porous coating to hold the implant in place
  • A second option, a stem designed to be cemented into place, provides strength and stability
 
     
The Tri-Lock Bone Preservation Stem
The Tri-Lock® Bone Preservation Stem

The design of the Tri-Lock Bone Preservation Stem allows for its use in minimally invasive surgery.

  • The shorter length, small profile, and shape of the stem make it possible for your surgeon to preserve more bone
 

Talk to a surgeon today about DePuy hip replacement options and find out how they help restore mobility and reduce pain. Click here to find a surgeon near you. 


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References:
1. Data on File at DePuy Orthopaedics, Inc. 2008.
2. Engh CA, Hooten JP, Zettl-Sshaffer KF, Ghaffarpour M, McGovern TF, Macalino GE, et. al. Porous-coated total hip replacement. CORR. 1994;298:89-96.
3. Buly R. The S-ROM stem: Versatility of stem/sleeve combinations and head options. Orthopaedics. 2005;28(9):S1025-S1032.
4. Adamany DC, Politi JR, Hauser WH. S-ROM hip prosthesis: 10- to 14-year results. Orthopedics. 2008;31:220.

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