Comparison of Functional Outcome between Bio Absorbable Interference Screw and Endobutton Fixation on Femur in Arthroscopic ACLReconstruction

Abstract

Objective: Arthroscopic reconstruction of the anterior cruciate ligament (ACL) is a common surgery with
varioustechniques,includingsuspensoryandaperture fixation.Thisstudyaimstocompare the clinicaloutcomes of
using bioabsorbable interference screws versus Endobutton fixation in arthroscopic ACL reconstruction in
our population, addressing the lack of local research and conflicting international data.
Material and Method: This prospective comparative study was conducted at Orthopedic Department Unit-I
of Jinnah Hospital in Lahore, including 60 patients (30 in each group) diagnosed with complete ACL tear.
ACLrepair was performed using quadrupled hamstring tendon autografts, with femoral fixation using either
bioabsorbable interference screws or Endobuttons. Clinical examinations and MRI confirmed ACL tears.
Post-surgery, all patients followed a standardized rehabilitation program. Knee stability was evaluated using
the Tegner-Lysholm scoring scale six months post-surgery. Data were analyzed using SPSS version 25.0,
with a p-value < 0.05 considered significant.
Results: The mean age was 37.10±8.876 years in group Aand 37.33±9.234 years in group B. Mean BMI was
28.35±9.741 kg/m² in groupAand 29.41±9.485 kg/m² in group B. Mean symptom duration was 3.5±1.5 weeks
in group A and 3.7±1.7 weeks in group B. Excellent outcomes were observed in 46.7% of the bioabsorbable
screws group and 66.7% of the Endobutton group, with a statistically significant p-value of 0.032.
Conclusion: Endobutton fixation produced superior functional outcomes compared to bioabsorbable screw
fixation in arthroscopic ACLreconstruction. Further long-term, large-scale trials are needed to confirm these
findings.
Keywords: Anterior Cruciate Ligament (ACL), Arthroscopy, Endobutton Fixation, Bioabsorbable Screws.