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  • 1
    In: Archives of Orthopaedic and Trauma Surgery, Springer Science and Business Media LLC
    Abstract: Bone preservation and long-term survival are the main challenges in cementless total hip arthroplasty (THA). A good bone stock is especially important for adequate anchorage of the cup in revision cases. However, the optimal acetabular cup design for preserving good bone stock is still unclear. We aimed to compare clinical outcome, radiological alterations, migration, and wear at mid-term for two different cup types. Materials and methods This retrospective matched-pair study was performed using the data for 98 THA cases treated with a monoblock cup composed of vitamin E-blended highly cross-linked polyethylene (VEPE; monoblock group) or a modular cup composed of a highly cross-linked polyethylene (HXLPE) without an antioxidant (modular group). Clinical results were evaluated using the Harris Hip Score (HHS). The obtained radiographs were analyzed for radiological alterations, migration, and wear using Einzel-Bild-Röntgen-Analyse (EBRA) software. Results The mean follow-up duration was 73.2 ± 19.2 months (range: 32–108 months) and 60.5 ± 12.2 months (range: 20–84 months) in the monoblock and modular groups, respectively. HHS improved to 95.7 points in the monoblock group and 97.6 points in the modular group, without significant differences ( p  = 0.425). EBRA measurements were obtained in all cases. Acetabular bone alterations were not detected on radiological assessments. Mean cup migration was 1.67 ± 0.92 mm (range: 0.46–3.94 mm) and 1.24 ± 0.87 mm (range: 0.22–3.62 mm) in the monoblock and modular groups. The mean wear rate was 0.21 ± 0.18 mm (range: 0.00–0.70 mm) and 0.20 ± 0.13 mm (range: 0.00–0.50 mm) in the monoblock and modular groups. Both migration and wear pattern showed no significant differences ( p  = 0.741 and 0.243). None of the cases required revision surgery, yielding an implant survival rate of 100% in both groups. Conclusion The isoelastic press-fit monoblock VEPE cup and modular metal-back HXLPE cup showed equivalent mid-term wear and cup migration. Long-term studies are required to determine the effects of modularity, isoelasticity, and polyethylene stabilization with vitamin E on cup loosening and survival rates.
    Type of Medium: Online Resource
    ISSN: 1434-3916
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 1458452-9
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  • 2
    In: Journal of Clinical Medicine, MDPI AG, Vol. 12, No. 10 ( 2023-05-17), p. 3509-
    Abstract: “Normal” and “abnormal” are frequently used in surgical planning and to evaluate surgical results of the forefoot. However, there is no objectifiable value of metatarsophalangeal angles (MTPAs) 2–5 in the dorsoplantar (DP) view with which to objectively evaluate lesser toe alignment. We aimed to determine which angles are considered to be “normal” by orthopedic surgeons and radiologists. Thirty anonymized radiographs of feet were submitted twice in randomized order to determine the respective MTPAs 2–5. After six weeks, the anonymized radiographs and photographs of the same feet without apparent affiliation were presented again. The terms “normal,” “borderline normal,” and “abnormal” were assigned by the observers. Viewers considered MTP-2 alignment from 0° to −20° to be normal, and below −30° abnormal; MTP-3, 0° to −15° to be normal and below −30° abnormal; MTP-4, 0° to −10° normal and below −20° abnormal. Between 5° valgus and 15° varus was the range of MTP-5 recognized as normal. High intra-observer but low interobserver reliability with overall low correlation of clinical and radiographic aspects was observed. The assessment of the terms “normal” or “abnormal” are subject to a high degree of variation. Therefore, these terms should be used cautiously.
    Type of Medium: Online Resource
    ISSN: 2077-0383
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2662592-1
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  • 3
    In: European Journal of Trauma and Emergency Surgery, Springer Science and Business Media LLC
    Abstract: Calcaneal fractures (CFs) are rare but potentially debilitating injuries. Apart from the open, far lateral or sinus tarsi approach, operative treatment can be performed minimally invasive and percutaneously with intramedullary nailing. In this study, we sought to investigate the functional outcome of severe CFs treated with the C-Nail® implant. Methods Twenty-two CFs (9 × Sanders III and 8 × Sanders IV), operated between 2016 and 2019, were followed up with a mean duration of 36 (± 11) months. The AOFAS score, pre- and postoperative Böhler angles, wound healing disorders, and patient-reported outcome measures (PROMs) like pain levels and return to work/sport levels were assessed. Results The mean AOFAS score was 72.0 (± 9.8). Four patients sustained wound healing disorders, yet no implant-associated surgical revision was required. Fifty percent of patients were pain-free within 1 year. Within 1 year, about 50% of the patients could return to sports, and about 80% of the patients could return to work. PROMs and functional results align with those from other implants reported in the literature. Conclusion Intramedullary nailing of severe CFs with the C-Nail® implant can be considered a safe treatment alternative that yields acceptable results at mid-terms.
    Type of Medium: Online Resource
    ISSN: 1863-9933 , 1863-9941
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2024
    detail.hit.zdb_id: 2276432-X
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  • 4
    In: Die Unfallchirurgie, Springer Science and Business Media LLC
    Abstract: Proximal femoral fractures represent the most frequent fracture entity in Germany accounting for more than 20% of all fractures. According to a decision of the Federal Joint Committee from 2019, proximal femoral fractures also have to be surgically treated within 24 h. In order to quantify a subjectively perceived increase in workload in trauma surgery at a supraregional trauma center, a retrospective analysis of the number of surgically treated proximal femoral fractures was performed. Proximal femoral fractures were chosen due to their high incidence and homogeneous treatment. Methods Using ICD-10 codes, all surgically treated proximal femoral fractures from 2016 to 2022, including the patient’s zip code, were retrieved from the database of the trauma center. Results The number of surgically treated proximal femoral fractures doubled from 2016 to 2022. The highest increase (60%) was recorded from 2020 to 2022. Heat maps show an increase in the catchment area radius as well. Conclusion When compared (inter)nationally, a disproportionate increase in the amount of surgically treated proximal femoral fractures was recorded at the trauma center studied. The increase of the catchment area radius and the number of patients treated in the urban area show that less and less hospitals participate in emergency treatment. Possible explanations are a lack of resources aggravated by the recent COVID-19 pandemic and a lack of qualified personnel, interface problems between the federal states or the strict requirements of the Federal Joint Committee in the treatment of proximal femoral fractures. It must be assumed that there is a clearly increased workload for all professions involved in the trauma center investigated, although the infrastructure has remained unchanged.
    Type of Medium: Online Resource
    ISSN: 2731-7021 , 2731-703X
    Language: German
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 3120926-9
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  • 5
    In: Journal of Orthopaedic Science, Elsevier BV, Vol. 29, No. 3 ( 2024-05), p. 861-866
    Type of Medium: Online Resource
    ISSN: 0949-2658
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2024
    detail.hit.zdb_id: 1481657-X
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  • 6
    Online Resource
    Online Resource
    Springer Science and Business Media LLC ; 2023
    In:  Knee Surgery, Sports Traumatology, Arthroscopy Vol. 31, No. 9 ( 2023-09), p. 3971-3980
    In: Knee Surgery, Sports Traumatology, Arthroscopy, Springer Science and Business Media LLC, Vol. 31, No. 9 ( 2023-09), p. 3971-3980
    Abstract: Personality traits, such as dispositional optimism and pessimism, have impact on a variety of health-related problems. Influence on outcome in total knee arthroplasty (TKA) could only be shown for other personality trait concepts, but not for dispositional optimism/pessimism. This study aims to examine the association of dispositional optimism/pessimism with pre-operative joint function and post-operative outcome in TKA. Methods Data were acquired in a multicentre, cross-sectoral, prospective study (the PROMISE Trial). Patients were followed for 12 months post-operatively. Dispositional optimism/pessimism was measured pre-operatively via the revised Life Orientation Test (LOT-R), pre- and post-operative function was measured via the 12 Item Knee-osteoarthritis outcome Scores (KOOS-12). Log-linear regression models considering known confounders and t-test were carried out to show the association of LOT-R scores with pre- and post-operative KOOS-12 scores. Results 740 patients were analyzed. Optimistic LOT-R was significantly positively associated to the mean scores of KOOS-12 pre- and post-operative, while pessimistic LOT-R was significantly associated negatively (pre-operative: optimistic p  = 0.001, pessimistic p  = 0.001; post-operative optimistic: 3M p  = 0.001, 6M p  = 0.001, 12M p  = 0.001; post-operative pessimistic: 3M p  = 0.01, 6M p  = 0.004, 12M p  = 0.001). Conclusion Optimism was positively associated with pre-operative joint function and, more importantly, post-operative functional outcome in TKA, while pessimism was associated with the opposite. Assessing patients’ general personality traits prior to surgery to identify pessimistic patients, hence being at risk for poor outcome in TKA, should be considered to react to the patients’ special needs and possible pessimistic expectations, i.e., through a cognitive–behavioral intervention, to potentially increase optimism and hereby post-operative outcome in TKA. Level of evidence Prognostic Level III.
    Type of Medium: Online Resource
    ISSN: 0942-2056 , 1433-7347
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 1473170-8
    SSG: 31
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  • 7
    In: Journal of Personalized Medicine, MDPI AG, Vol. 11, No. 6 ( 2021-06-12), p. 549-
    Abstract: Neutral coronal leg alignment is known to be important for postoperative outcome in total knee arthroplasty (TKA). Customized individually made implants (CIM) instrumented with patient-specific cutting guides are an innovation aiming to increase the precision and reliability of implant positioning and reconstruction of leg alignment. We aimed to compare reconstruction of the hip–knee–ankle angle (HKA) of the novel CIM system iTotal™ CR G2 (ConforMIS Inc.) to a matched cohort of the off-the-shelf (OTS) knee replacement system Vanguard™ CR (Zimmer Biomet). Retrospective analysis of postoperative coronal full-leg weight-bearing radiographs of 562 TKA (283 CIM TKA, 279 OTS TKA) was conducted. Via a medical planning software, HKA and rotation of the leg were measured in postoperative radiographs. HKA was then adjusted for rotational error, and 180° ± 3° varus/valgus was defined as the target zone HKA. Corrected postoperative HKA in the CIM group was 179.0° ± 2.8° and 179.2° ± 3.1° in the OTS group (p = 0.34). The rate of outliers, outside of the ±3° target zone, was equal in both groups (32.9%). Our analysis showed that TKA using patient-specific cutting guides and implants and OTS TKA implanted with conventional instrumentation resulted in equally satisfying restoration of the coronal leg alignment with less scattering in the CIM group.
    Type of Medium: Online Resource
    ISSN: 2075-4426
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2662248-8
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  • 8
    In: Biomedicine & Pharmacotherapy, Elsevier BV, Vol. 166 ( 2023-10), p. 115291-
    Type of Medium: Online Resource
    ISSN: 0753-3322
    RVK:
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2023
    detail.hit.zdb_id: 1501510-5
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  • 9
    In: Knee Surgery, Sports Traumatology, Arthroscopy, Springer Science and Business Media LLC, Vol. 31, No. 3 ( 2023-03), p. 892-904
    Abstract: Post-operative outcome after total knee arthroplasty (TKA) in the treatment of end-stage osteoarthritis correlates strongly with pre-operative impairment-driven patient treatment goals. However, a clinical tool for measuring patient treatment goals in correlation to impairments is still missing, which impedes patient-oriented indication in TKA. Methods Patients scheduled for TKA were recruited in four German hospitals. All patients were handed the INDICATE Knee Score pre-operatively. The score contains 31 treatment goals with respective impairments, subdivided into seven categories. They were asked to rank all treatment goals and impairments on a 3-point scale. Treatment goals and impairments were then checked for frequency of occurrence. Correlation of goal and impairment was tested. Analysis for associations of treatment goals and different cohort characteristics (age, sex, BMI) was conducted. Results 1.298 patients were included in the study. Seven treatment goals were categorised as “main goal” from more than 90% of all patients (“knee pain”, “range of motion”, “walking distance”, “overall physical function”, “climbing stairs”, “quality of life”, “implant survival”). Comparing age groups, there were significant associations towards higher expectations regarding working, physical and sports related treatment goals in younger patients ( 〈  65y) (“ability to work” ( P  ≤ .001), “sports activities” ( P  ≤ .001), “sex life” ( P  ≤ .001), “dependence on help of others” ( P  = .015), “preventing secondary impairment” ( P  = .03), “dependence on walking aids” ( P  = .005)). Higher BMI resulted in increasing relevance of “weight reduction” ( P  ≤ .001), “climbing stairs” ( P  = .039) “global health status” ( P  = .015) and “long standing” ( P  = .007) as a “main goal”. Analysis for differences in treatment goals regarding sex showed women choosing more treatment goals as “main goals” than men. Conclusion Seven treatment goals which were expected by  〉  90% in our collective can be classified as general treatment goals for TKA. Demographic factors (age, sex, BMI) were significantly associated with patients’ expectations for TKA. We conclude physicians should clearly assess their patients’ demands prior to TKA to maximise post-operative outcome. Level of evidence Prognostic Level III.
    Type of Medium: Online Resource
    ISSN: 0942-2056 , 1433-7347
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 1473170-8
    SSG: 31
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