Publications by authors named "Oliver Hansen"
Article Synopsis
- This study examines the outcomes of two different screw types used for treating fifth metatarsal fractures in elite athletes, specifically headless vs. headed screws.
- Researchers collected data from 40 athletes treated between 2016 and 2022 and compared factors like time to bone healing, return to play, and complications.
- Results showed similar healing times and return rates for both groups, indicating that both screw types are effective, but further analysis is necessary to assess other potential advantages of headless screws.
Background: The proposed advantages of hamstring autograft reconstruction when compared to alternative procedures, such as flexor hallucis longus (FHL) transfer, V-Y lengthening, and allograft reconstruction, are improved healing and reproduction of normal tendon biomechanics and reduced morbidity within the foot and ankle. In this study, we examined the effect of Achilles tendon reconstruction using hamstring autografts on strength and functional outcomes.
Methods: Patients who underwent Achilles repair with a hamstring autograft for insertional or midsubstance tendinopathy, delayed diagnosis of rupture, or infection after primary repair were evaluated for inclusion.
Article Synopsis
- - Advanced age is linked to osteoarthritis (OA), but the biological reasons are unclear; this study investigates whether a decline in DNA repair efficiency contributes to increased DNA damage with age in chondrocytes.
- - Research shows that chondrocytes from younger donors repair DNA damage more effectively than those from older donors, and activating Sirtuin 6 (SIRT6) enhances this repair process, while inhibiting it has the opposite effect.
- - Treatment with an SIRT6 activator (MDL-800) not only improves DNA repair in older chondrocytes but also reduces baseline DNA damage and may help prevent cell aging, as indicated by lower senescence markers in treated samples.
Background: Osteochondral autograft transplant (OAT) is often used to treat large osteochondral lesions of the talus and is generally associated with good outcomes. The addition of adjuncts such as cartilage extracellular matrix with bone marrow aspirate concentrate (ECM-BMAC) may further improve the OAT procedure but have not been thoroughly studied. We hypothesized that the placement of ECM-BMAC around the OAT graft would improve radiographic and patient-reported outcomes following OAT.
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- * The article reviews surgical options for chronic lateral ankle instability, such as direct ligament repair and various reconstruction techniques.
- * It highlights common complications like recurrent instability and nerve injury, providing management strategies and outcome data to address these issues.
Background: Optimal treatment for patients with severe ankle instability or failed previous ankle stabilization is not well defined, and newer techniques have limited presence in the literature.
Purpose/hypothesis: The purpose of this study was to evaluate clinical and radiographic outcomes after modified anatomic lateral ligament reconstruction using hamstring auto- or allograft in primary cases versus revision cases. We hypothesized that patients undergoing a revision procedure would demonstrate inferior patient-reported and radiographic outcomes.
Article Synopsis
- Peroneal tendon injuries, which cause lateral ankle pain and instability, can be treated by reconstructing the peroneus brevis with a hamstring autograft, though there's limited data on this surgical option's efficacy.
- A study involving 31 patients who underwent this type of surgery showed that most experienced significant improvements in various physical health measures a year post-surgery, with notable reductions in pain levels.
- Overall, the reconstruction procedure resulted in positive outcomes, with only a few patients reporting persistent pain and a low rate of complications, indicating it may be a successful treatment option for peroneal tendinopathy.
Article Synopsis
- Microfracture and osteochondral autologous transplantation (OAT) are two treatments for osteochondral lesions in the talus, with OAT being preferred for larger lesions and uncertain effectiveness for medium-sized ones (around 150 mm).
- This study evaluated the effectiveness of OAT combined with extracellular matrix and bone marrow aspirate concentrate (ECM-BMAC) against debridement with ECM-BMAC (DEB) for medium-sized lesions by analyzing clinical data of 52 patients.
- Results showed that OAT led to better MOCART scores, lower occurrences of cysts and edema, fewer revision surgeries, and reduced need for pain injections compared to DEB, though patient-reported outcome scores were similar.
Article Synopsis
- Microfracture (MF) has been a common treatment for osteochondral lesions of the talus (OLTs) with good short-term results, but long-term effectiveness is declining, prompting the exploration of new methods like extracellular matrix with bone marrow aspirate concentrate (ECM-BMAC).
- A study comparing 67 MF patients and 62 ECM-BMAC patients showed that ECM-BMAC resulted in significantly better MRI scores and lower revision surgery rates, indicating its potential advantages over traditional MF.
- Despite these findings, patient-reported outcomes, as measured by FAOS scores, did not show significant differences between the two treatment groups.
Article Synopsis
- Most modern footwear features, except for toe springs, have been well-researched; however, toe springs—curvature in the shoe's sole that keeps toes elevated—have received little investigation.
- This study examined how varying degrees of toe spring curvature (10 to 40 degrees) affect foot biomechanics, finding that the curvature changes joint moments and reduces the effort needed during walking.
- Findings suggest that while toe springs improve walking efficiency, their long-term use may weaken foot muscles and increase risks for conditions like plantar fasciitis.
Article Synopsis
- * A study reviewed outcomes of 103 patients who received the PVA hydrogel implant, comparing their pre- and post-surgery health scores over an average follow-up of about 26 months.
- * Results showed significant improvements in physical function and pain levels after surgery, but those who had prior foot surgeries reported higher pain intensity post-operation, while patients who had a Moberg osteotomy experienced less pain interference and intensity.
The COVID-19 pandemic has necessitated a rapid and drastic shift for clinicians and patients away from traditional in-person visits and toward internet-based virtual visits. The adoption of telehealth services is likely to persist in some capacity even as in-person visits resume, given the convenience and efficiency of telehealth consultations for patients and perhaps surgeons. A primary challenge of virtual visits, particularly in the field of orthopedic surgery, is the physical examination.
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- Stakeholder involvement is crucial in EU governance, particularly in the context of the European Chemicals Agency's recent proposal to restrict intentionally added microplastics.
- The study analyzed 205 stakeholders, identifying their interests and influence, revealing that major industries were active participants while national authorities and smaller companies were largely silent.
- Recommendations include enhancing stakeholder inclusion, especially for those who didn't participate, encouraging researchers to engage more, and providing support for small and medium-sized enterprises to ensure a balanced perspective in future policy-making.