The study wants to evaluate the performance of this EM guide in comparison to a traditional IM guide.
75 patients will be included in the extramedullary group (to be compared with a corresponding previous group of 75 patients treated with intramedullary guide).
Eligibility
Sex
ALL
Min age
18 Years
Max age
—
Healthy volunteers
No
Inclusion Criteria:
* Male or female ≥ 18 years old
* Indication to primary TKA, for any diagnosis operated with EM or IM guides
* Signature of the informed consent (only for prospective cohort)
* Been operated upon between January 2021 and September 2025 (only for retrospective cohort)
Exclusion Criteria:
* Revision surgery of knee arthroplasty
* Patients with malignant diseases (at the time of surgery)
* Patients with proven or suspect infections (at the time of surgery)
* Pregnancy end/or lactating (auto declaration)
* Patient with known allergy to the specific metallic components of the prosthesis (at the time of surgery)
Primary outcome measure(s)
Anterior Cortex Stylus — Radiographic angle at 3 moth post-op in the sagittal plane, between the anterior cortex of the distal femur and the femoral component and compare it in the group operated with Anterior Cortex Stylus versus the group operated with IM guide. Radiographic angle at 3 moth post-op of the femoral component in TKA in an Anterior Cortex Stylus (retro-prospective collected series) compared to intramedullary guide (previous group of patients)
This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.
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