The Role of Dual Mobility Implants in Reducing Instability in Primary THA
Dual mobility implants are typically thought of as an option for reducing recurrent dislocations in patients undergoing revision total hip arthroplasty (THA).
But there is a growing list of indications for the dual mobility constructs in primary THA, according to Matthew P. Abdel, MD, who spoke on the topic at ICJR’s 11th Annual Winter Hip & Knee Course.
Dr. Abdel, from Mayo Clinic, Rochester, Minnesota, will consider dual mobility implants in primary THA patients with at least a 5% risk for recurrent dislocations due to:
- Femoral neck fractures
- Conversion THAs
- Oncologic reconstructions
- Cognitive impairment
- Compromised abductors
- Lumbar fusion
Dual mobility constructs have the benefit of improving the head/neck ratio and increasing jump distance, which at least theoretically leads to a decrease in dislocations. These benefits need to be balanced against the possible complications, Dr. Abdel said, including intra-prosthetic dislocation and metal debris. There is also a theoretical risk of increased wear leading to increased loosening, but this is not supported by data, Dr. Abdel said.
Click the image below to watch Dr. Abdel’s presentation and learn more about the use of dual mobility implants in primary and revision THA.
Disclosures: Dr. Abdel has disclosed that he receives royalties from and is a paid consultant for Stryker.