General Information

Last update: November 24, 2015

Latest News

November 2015

The cycle for science tour Amsterdam - Barcelona 2016 is a fact! Cycling for science, in the defense of life. We will ride from Amsterdam to Barcelona and you are all invited to join!
The goal of this project is to raise funds to support research in the field of orthopedic sport medicine with focus on prevention of disease. The tour consists of eight stages, which brings the participants from the 2014 ESSKA hosting city, Amsterdam, to the 17th biannual ESSKA congress in Barcelona. During the tour in each city there will be a symposium with renowned speakers, charity dinners and auctions. Are you in?
For more information:


A new chapter, Medial malleolus osteotomy , has been added to the book on surgical techniques. Please go to the index to find out which chapters are online at the moment and to view the future chapters.


Knee Surg Sports Traumatol Arthrosc. 2015 Oct 30

Return to sports and clinical outcomes in patients treated for peroneal tendon dislocation: a systematic review

van Dijk PA, Gianakos AL, Kerkhoffs GM, Kennedy JG.

PURPOSE: The aim of this study was to determine the outcome following different surgical treatment techniques in the treatment of peroneal tendon dislocation and to establish whether return to sports was achieved universally following the procedures.
METHODS: A systematic review and best-evidence synthesis was performed. PubMed and EMBASE were searched for eligible studies. The last search was done in March 2015. Quality assessment of pooled data was performed using a modified Macleod scale and a best-evidence synthesis was performed. In total, 14 studies were included.
RESULTS: Surgical treatment provides improvement in the post-operative AOFAS score (p < 0.0001) and high satisfaction rates. The redislocation rate is less than 1.5 % at long-term follow-up. Patients treated with both groove deepening and SPR repair have higher rates of return to sports than patients treated with SPR repair alone (p = 0.022).
CONCLUSIONS: Surgical treatment of peroneal tendon dislocation provides good outcomes, high satisfaction and a quick return to sports. Rates in return to sports are significantly higher in patients treated with both groove deepening and SPR repair. To optimize treatment, the surgical management should involve increasing the superior peroneal tunnel volume by groove deepening and stabilizing the tendons by SPR repair.


J Tissue Eng Regen Med. 2015 Oct 29

Posterior talar process as a suitable cell source for treatment of cartilage and osteochondral defects of the talus

Correia SI, Silva-Correia J, Pereira H, Canadas RF, da Silva Morais A, Frias AM, Sousa RA, van Dijk CN, Espregueira-Mendes J, Reis RL, Oliveira JM

Osteochondral defects of the ankle are common lesions affecting the talar cartilage and subchondral bone. Current treatments include cell-based therapies but are frequently associated with donor-site morbidity. Our objective is to characterize the posterior process of the talus (SP) and the os trigonum (OT) tissues and investigate their potential as a new source of viable cells for application in tissue engineering and regenerative medicine. SP and OT tissues obtained from six patients were characterized by micro-computed tomography and histological, histomorphometric and immunohistochemical analyses. Proliferation and viability of isolated cells were evaluated by MTS assay, DNA quantification and live/dead staining. The TUNEL assay was performed to evaluate cell death by apoptosis. Moreover, the production of extracellular matrix was evaluated by toluidine blue staining, whereas cells phenotype was investigated by flow cytometry. Characterization of ankle explants showed the presence of a cartilage tissue layer in both SP and OT tissues, which represented at least 20%, on average, of the explant. The presence of type II collagen was detected in the extracellular matrix. Isolated cells presented a round morphology typical of chondrocytes. In in vitro studies, cells were viable and proliferating for up to 21 days of culture. No signs of apoptosis were detected. Flow-cytometry analysis revealed that isolated cells maintained the expression of several chondrocytic markers during culture. The results indicated that the SP and OT tissues were a reliable source of viable chondrocytes, which could find promising applications in ACI/MACI strategies with minimal concerns regarding donor zone complications.

October 2015

The Norwegian Sports Medicine Congress will be held at the Clarion Hotel & Congress Brattøra in Trondheim, Norway from 6 till 8 November 2015. Prof. dr. C. Niek van Dijk will give three lectures: " Bone bruises. Do they need treatment? "; " The role of alignment in treatment of cartilage defects" and " Indications for surgery of the most common foot/ankle injuries". Click here to find more information about the congress and click here for the programme.


Eur J Sport Sci. 2015 Sep 30:1-8.

Prevalence and determinants of symptoms of common mental disorders in retired professional Rugby Union players

Gouttebarge V, Kerkhoffs G, Lambert M.

The primary aim of this study was to determine the prevalence of symptoms of common mental disorders (CMD) (distress, anxiety/depression, sleeping disturbance, adverse nutrition behaviour, adverse alcohol behaviour and smoking) among retired professional Rugby Union players. The secondary aim was to explore the associations between stressors (life events, Rugby Union career dissatisfaction) and the health conditions under study. Therefore, cross-sectional analyses were conducted on baseline questionnaires from an ongoing prospective cohort study of retired professional Rugby Union players. An electronic questionnaire was established using validated questionnaires to assess symptoms of CMD and stressors. The electronic questionnaire was subsequently distributed to retired players by the national Rugby Union players' associations in France, Ireland and South Africa. Among 295 retired professional Rugby Union players (mean age of 38 years), prevalence rates were 25% for distress, 28% for anxiety/depression, 29% for sleeping disturbance, 24% for adverse nutrition behaviour, 15% for smoking and 62% for adverse alcohol behaviour. A higher number of life events were associated with distress (OR = 1.2; 95% CI 1.1-1.4), anxiety/depression (OR = 1.6; 95% CI 1.2-2.1), sleeping disturbance (OR = 1.6; 95% CI 1.2-2.1) and adverse nutrition behaviour (OR = 1.8; 95% CI 1.3-2.5). A higher level of dissatisfaction of the player's Rugby Union career was associated with distress (OR = 0.9; 95% CI 0.8-1.0), sleeping disturbance (OR = 0.9; 95% CI 0.9-1.0), smoking (OR = 0.9; 95% CI 0.9-1.0) and adverse nutrition behaviour (OR = 0.9; 95% CI 0.8-0.9). In conclusion, our study suggests that prevalence of symptoms of CMD is high among retired professional Rugby Union players, being associated with both a higher number of life events and a higher level of Rugby Union career dissatisfaction.


Foot Ankle Int. 2015 Sep 29. pii: 1071100715603999.

Diagnostic Accuracy of 2-Dimensional Computed Tomography for Articular Involvement and Fracture Pattern of Posterior Malleolar Fractures.

Meijer DT, de Muinck Keizer RO, Doornberg JN, Sierevelt IN, Stufkens SA, Kerkhoffs GM, van Dijk CN; Ankle Platform Study Collaborative-Science of Variation Group.

BACKGROUND: Up to 44% of ankle fractures have involvement of the posterior tibial margin. Fracture size and morphology are important factors to guide treatment of these fragments, but reliability of plain radiography in estimating size is low. The aim of the current study was to evaluate the accuracy of 2-dimensional computed tomography (2DCT) in the assessment of posterior malleolar fractures. Additionally, the diagnostic accuracy of 2DCT and its value in preoperative planning was evaluated.
METHODS: Thirty-one patients with 31 ankle fractures including a posterior malleolar fragment were selected. Preoperative CT scans were analyzed by 50 observers from 23 countries. Quantitative 3-dimensional CT (Q3DCT) reconstructions were used as a reference standard.
RESULTS: Articular involvement of the posterior fragment was overestimated on 2DCT by factors 1.6, 1.4, and 2.2 for Haraguchi types I, II, and III, respectively. Interobserver agreement on operative management ("to fix, or not to fix?") was substantial (κ = 0.69) for Haraguchi type I fractures, fair (κ = 0.23) for type II fractures, and poor (κ = 0.09) for type III fractures. 2DCT images led to a change in treatment of the posterior malleolus in 23% of all fractures. Surgeons would operatively treat type I fractures in 63%, type II fractures in 67%, and type III fractures in 22%.
CONCLUSION: Surgeons overestimated true articular involvement of posterior malleolar fractures on 2DCT scans. 2DCT showed some additional value in estimating the involved articular surface when compared to plain radiographs; however, this seemed not yet sufficient to accurately read the fractures. Analysis of the CT images showed a significant influence on choice of treatment in 23% with a shift toward operative treatment in 12% of cases compared to evaluating plain lateral radiographs alone.


During a meeting in Kiev on September 26th, Prof C.Niek van Dijk was appointed as Honorary member of the Ukrainian Arthroscopy & SportsTrauma Association (UASTKA founded in 1998).
On the picture also dr. Igor Zazirny (on the left) and prof. A. Kastrup (on the right). It was for the first time of the existence of UASTKA that they appointed an honorary membership to their society.

News Archive »

IOC logo

IOC Accredited Center