Inclinometer use in primary total hip arthroplasty does not improve acetabular component positioning: a...

Area of Science:

• Orthopedic surgery
• Surgical instrumentation
• Biomechanical analysis

Background:

• Total hip arthroplasty (THA) is a common procedure to address hip pathology.
• Accurate acetabular component placement is crucial for THA success.
• Intraoperative inclinometers are tools for measuring acetabular inclination.

Purpose of the Study:

• To evaluate the accuracy and efficacy of intraoperative inclinometers in total hip arthroplasty.
• To determine if inclinometer use improves acetabular component positioning.

Main Methods:

• A non-randomized control trial compared patients undergoing primary THA with and without intraoperative inclinometers.
• Acetabular component inclination and anteversion were measured using postoperative radiographs.
• Patient outcomes, including dislocation rates, were assessed.

Main Results:

• The inclinometer group showed a statistically higher mean inclination angle, but this was not clinically significant.
• No significant differences were observed in anteversion, safe zone adherence, or dislocation rates between groups.
• Inclinometer use and body mass index (BMI) were significant factors influencing inclination.

Conclusions:

• Current intraoperative inclinometer use offers no demonstrable benefit for primary THA outcomes.
• Further research into patient positioning variations may be warranted.
• The study did not find a correlation between inclinometer measurements and radiographic outcomes.