[Long-term results with the cementless CLS stem in hip replacement]

Area of Science:

• Orthopedic Surgery
• Biomaterials Science

Background:

• Cementless hip arthroplasty aims for long-term implant stability.
• The CLS stem is a widely used cementless option.
• Long-term outcomes of cementless stems require ongoing evaluation.

Purpose of the Study:

• To assess the long-term clinical and radiological outcomes of the cementless CLS hip stem.
• To determine the survival rate and functional improvement after cementless CLS stem implantation.
• To identify any long-term complications associated with the cementless CLS stem.

Main Methods:

• Clinical and radiological assessment of 66 patients with CLS stems at an average 10.7-year follow-up.
• Utilized Merle d'Aubigné and Harris hip scores for clinical evaluation.
• Radiological assessment included evaluation for radiolucencies and heterotopic ossifications.

Main Results:

• A 94.5% survival rate was observed, with no aseptic loosening; revisions were due to infection or fracture.
• Mean Merle d'Aubigné scores improved from 9.0 to 16.0, and mean Harris hip scores were 87.3.
• Periprosthetic osteolytic zones occurred in 45% of cases, particularly with cementless polyethylene cups.

Conclusions:

• The CLS stem demonstrates positive long-term clinical and radiological results in hip replacement.
• The study confirms the efficacy of the CLS stem, minimizing previously reported thigh pain.
• Long-term follow-up supports the use of cementless CLS stems in hip arthroplasty.