Abstract
Background
If a transverse incision can be safely used for total knee arthroplasty (TKA), decreases in scar formation, reduced injury of the infrapatellar branch of the saphenous nerve and improved kneeling motion will be observed.
Methods
We evaluated 95 patients (101 knees) on whom primary TKA was performed with follow-up of more than 2 years. A longitudinal incision was used for the first 40 knees and a transverse incision for the remaining 61 knees. Operation time, blood loss, complications and Knee Society Score were evaluated. Wound lengths, widths and the Manchester Scar Scale (MSS) were measured 1 year after the surgery. Further examination evaluated sensory disturbances and whether kneeling was possible.
Results
The complication rate in both groups was almost the same. The wound lengths measured at a 90° knee-flexed position were about 15 cm with no significant difference between the groups. The average width measured at a maximum area was significantly smaller in the transverse group than in the longitudinal group. MSS of the transverse group was also significantly lower than that of the longitudinal group. Sensory disturbance was found to be significantly smaller in the transverse group than in the longitudinal group both in subjective and objective evaluation at 1 year after surgery. When a transverse incision was used, the direction of the incision corresponded to the running direction of the saphenous nerve, and thus, we were able to reduce sensory disturbances on the distal lateral side of the knee joint. The transverse group (70.4%) performed significantly better than the longitudinal group (40.6%) at kneeling motion.
Conclusions
We showed that making a transverse incision is a safe method, resulting in a reduction of scar formation and less dysfunction of the infrapatellar branch of the saphenous nerve, and improvement of kneeling motion.
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Acknowledgments
We are deeply grateful to Dr. Nobuyuki Yoshino at Kyoto Kujo Hospital for valuable advices. I am also greatly indebted to all the people who gave me support and cooperation during this study, especially those at Yatsuo General Hospital, Harue Hospital and Fukui General Hospital.
Conflict of interest
None of the authors of this manuscript have received any benefits or funding from anything related directly or indirectly to this article.
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Ojima, T., Yoshimura, M., Katsuo, Si. et al. Transverse incision advantages for total knee arthroplasty. J Orthop Sci 16, 524–530 (2011). https://doi.org/10.1007/s00776-011-0133-4
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DOI: https://doi.org/10.1007/s00776-011-0133-4