Total diz artroplastisi sonrası heterotopik ossifikasyon
Amaç: Bu çalışmada, total diz artroplastisinden (TDA) sonra heterotopik ossifikasyon (HO) gelişim sıklığı araştırıldı, gelişim zamanı ve klinik görünümü belirlenmeye çalışıldı. Çalışma planı: Total diz artroplastisi uygulanan 226 dizin ilk bir yıl içinde çekilen ardışık (6. hafta, 3. ay, 6. ay ve 12 ay) radyografileri geriye dönük olarak değerlendirildi. Heterotopik ossifikasyon tanısı TDA öncesi ve sonrası grafilerin karşılaştırılmasıyla kondu. Heterotopik ossifikasyon Figgie ve ark.nın sistemiyle derecelendirildi, klinik ve radyografik seyri belirlendi. Heterotopik ossifikasyon gelişen olgularda olası etkenler araştırıldı. Derin ven trombozunun önlenmesi amacıyla mekanik yöntemler dışında farmakolojik profilaksi uygulanmadı. Sonuçlar: Total diz artroplastisinden sonra, 226 dizin yalnızca ikisinde (%0.9), altıncı ayda, distal femurun suprakondiler bölgesinde 1. derece HO saptandı. Her iki olgunun da bu dönemde ayakta dururken diz bölgesinde ılımlı, nonspesifik bir ağrı dışında yakınması yoktu. Diz patolojisi her iki olguda da primer osteoartritti ve her ikisinde de HO 12. ay grafilerinde kendiliğinden kayboldu. Çıkarımlar: Çalışmamızdaki HO sıklığının daha önceki çalışmalara göre düşük bulunmasının olası nedeninin, hastalarımızın tromboprofilaksi amaçlı farmakolojik tedavi almamaları olduğu düşünüldü. Heterotopik ossifikasyonun daha geç ortaya çıkmış olması, TDA olgularının HO gelişimi yönünden daha uzun süre izlenmesi gerektiğini göstermektedir.
Heterotopic ossification after total knee arthroplasty
Objectives: The purpose of this study was to determine the incidence, time to development and clinical presentation of heterotopic ossification (HO) after total knee arthroplasty (TKA). Methods: We retrospectively reviewed consecutive radiographs of 226 knees that were obtained at the end of sixth week, third, sixth, and twelfth months following TKA. The radiographic diagnosis of HO was based on the comparison of pre- and postoperative serial radiographs. Grading of HO was made according to the classification of Figgie et al. The clinical and radiographic course of HO and possible predisposing factors were investigated. No pharmacological prophylaxis was used other than mechanical measures to prevent deep vein thrombosis. Results: Heterotopic ossification was detected only in two knees (0.9%) at the sixth month evaluation of lateral radiographs. It was grade 1 in both knees and localized at the supracondylar area of the distal femur. Both patients had primary osteoarthritis. There were no complaints except for mild nonspecific pain around the knee while standing. In both cases, HO underwent spontaneous improvement and disappeared on the twelfth month radiographs. Conclusion: Compared with previous studies, the incidence of HO after TKA was quite low and this could be attributed to the lack of pharmacological thromboprophylaxis. Delayed appearance of HO in two patients suggests that TKA cases be monitored for a longer period for HO development.
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