Köpeklerde TPLO’nun mekanik tibial eksen kayması üzerine etkisi: Sagital düzlemde iki boyutlu kemik çalışması

Öz

Köpeklerde tibial plato düzleştirme osteotomisi (TPLO) simülasyonu sonrasında tibial eksen kaymasını (TAS), tibial plato açısındaki (TPA) değişimi ve tibial eklem yüzeyinin konumunu belirlemek için, 23 farklı ırktan 91 köpeğe ait tibialar kullanıldı. TPA, tibial uzunluk, “midshaft” genişliği, tibianın condylus medialis uzunluğu ve tibial eksenle (TA) condylus medialis’in en cranial noktası arasındaki mesafe tibia görüntüleri üzerinden ölçüldü. Simülasyonu gerçekleştirilmiş TPLO'dan sonra tüm ölçümler tekrar gerçekleştirildi. Pre- ve postoperatif değerleri karşılaştırmak için Paired t-test kullanıldı. Pre- ve postoperative TAS değerleri ile tibianın uzunluğu, tibianın genişliği, condylus medialis uzunluğu, ve/veya TPA’nın rotasyon derecesi arasında ilişkinin farklı olup olmadığı değerlendirmek için Pearson korelasyon analizi yapıldı. Çalışmanın sonuçları, TPLO ile medial condylusun en cranial noktasının caudale ve distale, en caudal noktasının ise caudale ve proximale doğru kaydığını gösterdi. Bu kaymalar, operasyon öncesi ve sonrası TA ile en cranial nokta arasındaki mesafe değerinde ve en cranial noktanın condylus medialis uzunluğundaki yüzde değerinde önemli farklılığa neden oldu. TPLO’nun, caudal TAS ve medial condylusun eklem yüzeyinin, tibianın distal parçasına göre pozisyonunu değiştirdiği sonucuna varıldı.

Anahtar Kelimeler

• Köpek
• Tibia
• Tibial Eksen
• TPLO

Effect of tibial plateau leveling osteotomy on mechanical tibial axis shift in dogs: two dimensional bone study in sagittal plane

Öz

To determine the tibial axis shift (TAS), change in tibial plateau angle (TPA), and the position of the tibial articular surface after tibial plateau leveling osteotomy (TPLO) simulation in the tibiae of dogs, tibias of 91 dogs from 23 different breeds were used. The TPA, tibial length, midshaft width, medial tibial condyle length, and distances between the tibial axis (TA) and cranial-most point of the medial condyle were measured on the tibial images. After simulated TPLO, all measurements were retaken. Paired t-tests were used to compare pre- and postoperative variables. Pearson correlation analysis was conducted to assess whether the difference between pre- and postoperative TAS was related to tibial length, tibial width, medial condyle length, and/or the degree of TPA rotation. The results showed that TPLO shifted the cranial-most point of the medial condyle caudally and distally, and the caudal-most point caudally and proximally. These shifts resulted in significant differences between pre- and postoperative distances between the TA and the cranial-most point and its percentage to the medial condyle length. It is concluded that the TPLO led to caudal TAS and altered the position of the articular surface of the medial condyle with respect to the distal part of the tibia.

Anahtar Kelimeler

• Dog
• Tibia
• Tibial Axis
• Tibial Plateau Leveling Osteotomy

Kaynakça

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