Patient-specific guides improve hip arthroplasty surgical accuracy

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Medical Technology

Background:

• Patient-specific (PS) technology's role in total hip arthroplasty (THA) is not well-established.
• Evaluating PS guides for surgical accuracy in THA is crucial for improving patient outcomes.

Purpose of the Study:

• To investigate if PS guides reduce average surgical errors in THA.
• To determine if PS guides decrease outlier error frequencies.
• To assess the predictive capability of PS guides for implant sizing.

Main Methods:

• A single surgeon performed THA using either standard or PS guides, blinded to pre-operative plans.
• Surgical errors, specifically leg length discrepancies (LLD), were compared between the two groups.
• Outlier error frequencies and implant sizing accuracy were analyzed.

Main Results:

• The median LLD was significantly lower in the PS group (1.4 mm) compared to the standard group (3.3 mm) (p=0.02).
• The standard guide group exhibited significantly more outlier errors than the PS group.
• The standard group also frequently used undersized implants, unlike the PS group.

Conclusions:

• PS guides enhance surgical accuracy in total hip arthroplasty.
• The use of PS technology leads to reduced leg length discrepancies and fewer surgical errors.
• PS guides show potential for improving implant sizing accuracy in THA.