Dear NOF members and others interested in Acta Orthopaedica, | Acta Orthopaedica's Newsletter will now be published twice a month. Included in this second letter for May you will find information regarding the postponement of the NOF Congress, how to join our mailing list, 3 selected article highlights, and a clickable list of the 6 latest publications.
Best regards,
Anders Rydholm
Editor-in-chief |
|
|
| Postponement Nordic Orthopaedic Federation Congress until 7–9 September, 2022 |  | | Due to the Russian attack on Ukraine and the resulting uncertain situation, also regarding Lithuania, the NOF has decided to postpone the 2022 congress (scheduled from May 10 – 13) to September 7 – 9, 2022. The precourse will take place on Tuesday September 6. We are deeply indebted to the Lithuanian Society of Orthopaedics and Traumatology for organizing this event on a new date. We invite you all to register for the NOF congress in September and we look forward to meeting you all in a peaceful Vilnius! | | | | | | | | | Join our mailing list | This newsletter circulated twice a month should have been forwarded to you as a NOF member by your national society head (Denmark, Estonia, Finland, Iceland, Lithuania, Norway, Sweden, the Netherlands). This mode of distribution can, however, be slow or unreliable due to outdated contact information. An alternate way to ensure that you receive this newsletter directly as it is published is to join our mailing list by clicking on the link below. | | | | | | |
|
|
Precision of low-dose CT-based micromotion analysis technique for the assessment of early acetabular cup migration compared with gold standard RSA: a prospective study of 30 patients up to 1 year
Vasileios Angelomenos, Maziar Mohaddes, Raed Itayem, Bita Shareghi
Acta Orthop 2022; 93: 459-465.
Computed tomography micromotion analysis (CTMA) is an analysing tool that can be
used to determine implant micro-movements after implantation without the need for bone or implant markers. Promising results of this new technique have already been published in our journal. Before CTMA can replace marker-based radiostereometry (RSA) to detect early implant migration, comparative studies for different joints and implants must be performed as each have their own characteristics such as metal artefacts, radiation doses, and prosthesis design. Angelomenos et al. can be complimented with the first study evaluating the precision (by double examinations) and migration pattern of cemented acetabular cups using both RSA and CTMA in the same cohort of 30 patients. Only 1 patient had to be excluded from analysis with CTMA versus 3 patients with RSA because of insufficient radiographs. The authors found a very good level of agreement between the methods for cup translations and rotations after 1 year. This study contributes to the future of implant introduction and also the overall setting for research on implants.
Bart Swierstra, Co-Editor |
| | Median 10-year whole blood metal ion levels and clinical outcome of ReCap-M2a-Magnum metal-on-metal total hip arthroplasty
Sakari Pietiläinen, Axel Linnovaara, Mikko S Venäläinen, Heikki Mäntymäki, Inari Laaksonen, Petteri Lankinen, Keijo T Mäkelä
Acta Orthop 2022; 444-450.
After receiving guidance from the European Chemicals Agency (ECHA) in October 2021, the EU commission has decided to raise the concern level for Cobalt contained in medical devices. The concerns have arisen mainly in patients with metal-on-metal bearing joint replacements. The presence of cobalt and other metals, such as chromium, in orthopaedic implants generates conflicting evidence related to potentially hazardous effects. In this study the authors conclude that whole blood Cr and Co ion levels decreased in median 10-year follow-up in this group of 1450 patients operated with ReCap-M2a-Magnum THA. 14-year survival was 85% for any reason for revision, and 69% for metal-related adverse events which is relatively high. Female sex was associated with an increased revision risk and also an increased risk of metal-related adverse events. The authors suggest that after 10 years from implantation a 5-year measurement interval may be sufficient for asymptomatic ReCap-M2a-Magnum patients.”
Li Felländer-Tsai, Co-editor |
| | Postoperative pain as a risk factor for stiff knee following total knee arthroplasty and excellent patientreported outcomes after manipulation under anesthesia
Mikko T Rantasalo, Riku A Palanne, Sukhdev Saini, Anne P Vakkuri, Rami Madanat, Skants K Noora
Acta Orthop 2022; 432-437.
The value of manipulation of the knee after TKR has since long divided knee surgeons in two groups, believers and non-believers. Early manipulation has the risk of rupture of the capsule and delayed action has been regarded as meaningless by the non-believers. Not much has been published on the subject.
In this report analyzing 394 TKRs out of which 10% needed manipulation due to to stiffness, the relation betweeen pain and risk of stiffnes is shown, which is not sensational. The interesting finding is that manipulation performed 3 months postoperatively improves ROM and results in comparable PROMs in the manipulated and non-manipulated group after 1 year. The indication for action was set to ≤ 90° of flexion. I think that full extension is more important for function and risk of revision than full flexion, but information on extension lag is missing. All patients had resurfacing of the patella, but the importance of that for the risk of stiffnes is unknown.
Accurate pain management is of major importance to avoid postoperative stiffnes. All patients in this study received standardized fast-track care, including multimodal analgesia and immediate ambulation without any restrictions. Abandon of the traditional postoperative stay- in-bed for some days and inadequate pain treatment and the start of fast track care in the future will most probably decrease the need for manipulation and I think this report will switch the balance between believers and non-believers.
Urban Rydholm, Co-editor |
|
|
|
|
