"Latar Belakang: Diagnosis dan tatalaksana osteoartritis lutut sementara ini lebih berfokus pada sendi tibiofemoral dan kesegarisan di bidang tersebut, yang hanya memberikan asosiasi lemah dengan nyeri dan disabilitas. Sementara itu, masih sangat minim studi yang mempelajari kesegarisan patela pada osteoartritis lutut, terutama hubungannya dengan derajat keparahan penyakit secara radiografis, defek kartilago, dan juga nyeri dan disabilitas.
Metode: Penelitian ini merupakan studi potong lintang yang diikuti oleh pasien RSUPN Cipto Mangunkusumo yang terdiagnosis osteoartritis lutut. Subjek menjalani pemeriksaan radiografis dan magnetic resonance, dari situ dievaluasi kesegarisan patela, grade Kellgren-Lawrence (KL), dan defek kartilago yang dinilai dengan grade International Cartilage Regeneration and Joint Preservation Society(ICRS). Kesegarisan patela dinilai dari sulcus angle(SA), congruence angle(CA), trochlear angle(TA), lateral trochlear inclination(LTI), trochlear depth(TD), bisect offset(BO), patellar displacement(PD), lateral patellar tilt angle(LPTA), dan lateral patellofemoral angle(LPFA).Pasien juga diukur skor WOMAC yang menilai nyeri dan disabilitas.
Hasil: Ditemukan korelasi antaraTA (r = -0,397; p < 0,001), LTI (r = -0,333; p = 0,004), BO (r = 0,268; p = 0,020), dan PD (r = 0,299; p = 0,009) dengan grade KL patelofemoral. TA juga berkorelasi juga dengan grade KL tibiofemoral (r = -0,246; p = 0,033). TA (r = -0,246; p = 0,033) juga berkorelasi dengan grade KL tibiofemoral. Tidak ditemukan parameter kesegarisan patela yang berkorelasi dengan grade ICRS. Sementara itu SA (r = 0,238; p = 0,039), LTI (r = -0,235; p = 0,042), TD (r = -0,374; p = 0,001), BO (r = 0,257; p = 0,026) dan LPTA (r = 0,267; p = 0,021) berkorelasi dengan nyeri. LTI (r = -0,229; p = 0,048), TD (r = -0,251; p = 0,030) dan LPTA (r = 0,314; p = 0,006) berkorelasi terhadap disabilitas.
Kesimpulan: Kesegarisan patela axial berkorelasi dengan keparahan radiografis osteoartritis lutut, tidak hanya pada kompartemen patelofemoral tetapi juga tibiofemoral. Kesegarisan patela juga berkorelasi dengan nyeri dan disabilitas.
Background: Diagnosis and treatment of knee osteoarthritis has been focused on the tibiofemoral joint and its alignment, even though they provide little contribution to pain and disability. The aim of this study is to evaluate the axial patellar alignment in patients with knee osteoarthritis, especially its association with the radiographic findings, cartilage defect on magnetic resonance, as well as pain and disability.Methods: Patients with knee osteoarthritis underwent radiographic and magnetic resonance examinations. Patellar alignment was represented by sulcus angle (SA), congruence angle (CA), trochlear angle (TA), lateral trochlear inclination (LTI), trochlear depth (TD), bisect offset (BO), patellar displacement (PD), lateral patellar tilt angle (LPTA), dan lateral patellofemoral angle (LPFA). We evaluated the association between patellar alignment and Kellgren-Lawrence (KL) grade of the radiographs, International Cartilage Regeneration and Joint Preservation Society (ICRS) grade of the cartilage defect on magnetic resonance images, and the Western Ontario and McMaster Universities Arthritis Index (WOMAC) score.Results: Radiographically, TA (r = -0,397; p < 0,001), LTI (r = -0,333; p = 0,004), BO (r = 0,268; p = 0,020), and PD (r = 0,299; p = 0,009) were correlated with patellofemoral KL grade. TA was also correlated with tibiofemoral KL grade (r = -0,246; p = 0,033). However, no patellar alignment index was found to be correlated with ICRS grade. Furthermore SA (r = 0,238; p = 0,039), LTI (r = -0,235; p = 0,042), TD (r = -0,374; p = 0,001), BO (r = 0,257; p = 0,026) and LPTA (r = 0,267; p = 0,021) were correlated with pain score in WOMAC. Meanwhile, LTI (r = -0,229; p = 0,048), TD (r = -0,251; p = 0,030) and LPTA (r = 0,314; p = 0,006) were correlated with disability score in WOMAC.Conclusion: Axial patellar alignment was correlated with radiographic severity of knee osteoarthritis, not only in patellofemoral compartment but also in tibiofemoral compartment. Patellar alignment was also associated with pain and disability."
