Is the Akagi Line a Reliable Landmark for Adjusting the Rotational Axis of the Tibial Component in Patients with Patellofemoral Instability?

Mehmet Barıs Ertan, Ozkan Kose, Ersin Tasatan, Albert Cakar, Mehmet Melih Asoglu, İsmail Dikmen

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Article in Indian journal of orthopaedics, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Mehmet Barıs ErtanMuratpasa, 07100 Antalya, Turkey Department of Orthopedics and Traumatology, Antalya Training and Research Hospital, Kazım Karabekir Cd.ORCID 0000-0002-3783-7109

Ozkan KoseMuratpasa, 07100 Antalya, Turkey Department of Orthopedics and Traumatology, Antalya Training and Research Hospital, Kazım Karabekir Cd.ORCID 0000-0002-7679-9635

Ersin TasatanDepartment of Orthopedics and Traumatology, Prof. Dr. Cemil Tascioglu City Hospital, Istanbul, Turkey.ORCID 0000-0002-4018-0320

Albert CakarIstanbul, Turkey Department. of Orthopedics and Traumatology, Istanbul Training and Research Hospital.ORCID 0000-0002-1422-2208

Mehmet Melih AsogluMuratpasa, 07100 Antalya, Turkey Department of Orthopedics and Traumatology, Antalya Training and Research Hospital, Kazım Karabekir Cd.ORCID 0000-0001-7515-7844

İsmail DikmenMuratpasa, 07100 Antalya, Turkey Department of Orthopedics and Traumatology, Antalya Training and Research Hospital, Kazım Karabekir Cd.ORCID 0000-0003-0272-2069

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Purpose: This study aimed to investigate whether the Akagi line is a reliable anatomic landmark for adjusting the rotational axis of the tibial component in patients with patellofemoral (PF) malalignment. Materials and methods: This retrospective case-control study included 86 patients with PF instability and 129 controls. On the superimposed axial CT images, TT-TG, TT-PCL, nTT-TG, nTT-PCL, knee joint rotation, and the angle between the Akagi line and surgical transepicondylar axis (Akagi/sTEA angle) were measured. In addition, a modified Akagi line, drawn 1 cm medial to the patellar tendon attachment, was defined, and the angle between the new Akagi line and sTEA (mAkagi/sTEA angle) was also measured and compared between groups. Results: There were 86 patients (47 females, 39 males) in the case group and 129 patients (56 females, 73 males) in the control group with a mean age of 35.7 ± 17.9 years and 41.1 ± 18.8 years, respectively ( Conclusions: The Akagi line might cause unacceptable external rotation of the tibial component in patients with PF malalignment. The use of the modified Akagi line described in this study may be a solution for the rotational mismatch between femoral and tibial components in TKA. Level of evidence: Level III, retrospective case-control study.

Indexed as

Akagi linePatellofemoral malalignmentTibial component rotationTotal knee arthroplastyTotal knee replacement

Identifiers

PMID37214361

DOI10.1007/s43465-023-00868-9

PMCPMC10192469

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