Early functional outcome after subvastus or parapatellar approach in knee arthroplasty is comparable
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Wouter L.W. van Hemert • Rachel Senden • Bernd Grimm • Matthijs J.A. van der Linde • Arno Lataster • Ide C. Heyligers
- چاپ و سال / کشور: 2010
Description
Purpose In total knee arthroplasty, tissue-sparing techniques are considered more important, as functional gain could become more advantageous when early mobilization is commenced. The parapatellar approach is most often used, whereas the subvastus approach is a suitable alternative. Presently, it is unknown, according to true objective measurements, which of the two is most advantageous. Methods In this prospective randomized double-blind, short-term trial measurements (KSS, WOMAC, PDI, VAS, ability to perform) were obtained at day 1, day 3, 1 week, 6 weeks, and 3 months. Results The subvastus group (n = 20) showed only significantly less extension lag direct postoperative (P = 0.04) compared with the parapatellar group (n = 20). Other scores were not significantly different. The Dynaportknee test, an objective performance-based tool, could not demonstrate significant differences. A blunt anatomical dissection was carried out in both observational and histological to support findings. A dense innervation of the distal vastus medialis was found. This is at risk employing the subvastus approach. Both approaches harm the suprapatellar bursa. The vastus medialis sheath must be detached distally to open the knee joint. No true separate vastus medialis obliquus could be identified. Conclusion Comparable to literature, only mild advantage employing the subvastus approach was found, but only early postoperative and not objectively. As this approach is also not suitable in every case, we will continue to use the parapatellar approach.
Knee Surg Sports Traumatol Arthrosc (2011) 19:943–951 DOI 10.1007/s00167-010-1292-0 Received: 16 February 2010 / Accepted: 28 September 2010 / Published online: 17 October 2010
