TY - JOUR A1 - Meyer, Julian S. A1 - Hessenauer, Florian M. A1 - Reichel, Thomas A1 - Pham, Mirko A1 - Plumhoff, Piet A1 - Rueckl, Kilian T1 - Isolated mononeuropathy of the suprascapular nerve: traumatic traction injury as an important differential diagnosis to the entrapment syndrome JF - JSES International N2 - No abstract available. KW - MR neurography KW - Suprascapular nerve KW - compression syndrome KW - neuropathy KW - shoulder neurolysis KW - suprascapular notch Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-229322 VL - 4 IS - 3 ER - TY - THES A1 - Heinz, Tizian T1 - Das Knorpelregister DGOU zur systematischen Patientenerfassung nach knorpelchirurgischen Eingriffen des Kniegelenkes - Analyse und wissenschaftliche Aufarbeitung der ersten 100 Patienten an der Orthopädischen Klinik König-Ludwig-Haus T1 - The cartilage registry DGOU for a systematic patient evaluation after cartilage repair surgery of the knee joint - An analysis and scientific work up of the first 100 patients at the orthopedic clinic König-Ludwig-Haus N2 - Die stark limitierte intrinsische Regenerationsfähigkeit des hyalinen Gelenkknorpels stellt auch in der modernen Medizin eine große Herausforderung dar. Während eine Vielzahl von knorpelchirurgischen Techniken am Kniegelenk koexistieren, bleibt die Selektion des am besten geeigneten Therapieverfahrens eine zentrale Herausforderung des orthopädischen Chirurgen. Hierzu bieten in Zeiten evidenzbasierter Medizin medizinische Register die Möglichkeit, klinische Behandlungsdaten systematisch in einem breiten Patientenkollektiv zu erfassen, die klinische Versorgungsrealität adäquat abzubilden sowie neue Behandlungsstrategien und Hypothesen zu generieren. Das Knorpelregister der DGOU bietet als webbasierte Registerform eine besonders moderne, effiziente und unbürokratische Form der Patientennachverfolgung über subjektiv bewertete und validierte Funktionsscores. Für das gesamte Registerkollektiv von 100 Patienten an der Orthopädischen Klinik-König-Ludwig Haus ergaben sich bereits sechs Monate nach dem knorpelchirurgischen Eingriff signifikant höhere Funktionsscores im IKDC und KOOS, welche sich auch im mittelfristigen Verlauf von zwölf Monaten noch signifikant erhöht gegenüber ihren präoperativen Werten zeigten. Die mediale Femurkondyle und knorpelige Patellarückfläche waren im Registerkollektiv am häufigsten von Defekten betroffen. Meist handelte es sich hierbei um drittgradige Defekte nach ICRS degenerativer Genese. Während das mechanische Débridement bei großflächigem, arthrotischem Gelenkknorpelverschleiß keine suffiziente Therapieoption bietet, ist zum Nutzen und Effektivität des Débridements bei fokalen, umschriebenen Gelenkknorpeldefekten bisher nur wenig bekannt. Im Registerkollektiv zeigte sich für das isoliert mechanische Débridement von Gelenkknorpeldefekten eine signifikante Verbesserung der subjektiven Funktionsscores. Im Falle begleitend durchgeführter meniskuschirurgischer Eingriffe zeigt sich die Datenlage deutlich heterogener und bietet Anlass für weiteren wissenschaftlichen Diskurs. N2 - The very limited ability for intrinsic regeneration of the hyaline cartilage poses an enormous challenge even in the days of modern medicine. While there exists a plethora of surgical techniques for cartilage repair, the orthopedic surgeon is regularly faced with the challenge of selecting the most appropriate therapeutic modality. Therefore, in times of evidence-based medicine, medical registries provide the ability of systematic patient evaluation, thereby reflecting data of real word clinical care in the routine setting, which allows for the development of new treatment strategies and hypotheses. The cartilage registry DGOU as a fully web based organized registry provides a particularly modern, efficient and unbureaucratic way for systematic patient evaluation and follow-up with the use of patient reported outcome measures. With respect to the included collective of a total of 100 patients at the orthopedic department König-Ludwig-Haus, significantly improved patient reported outcome measures of the KOOS and IKDC were observed as early as six months after the initial surgical procedure. Patient reported outcomes were still improved significantly in the mid-term follow-up of twelve months after the initial surgery. The medial femoral condyle and the patellar surface turned out to be the most frequent site of cartilage defects. Most of the times, cartilage defects were graded as grade III defects according to ICRS. Cartilage damage was mostly due to degenerative deterioration. According to the literature available, the usage of the mechanical debridement cannot be recommended for the extensive, arthritic type of cartilage defect. However, data on the efficiency of mechanical debridement for focal, non-arthritic cartilage defects are sparse and controversial. In this study, for the patients evaluated, a significant improvement of the patient reported outcome measures were observed after the mechanical debridement of focal cartilage defects. In the cases of concomitantly performed meniscal surgery, data turned out to be of a more heterogenous appearance which gives cause for further scientific discourse. KW - Hyaliner Knorpel KW - Kniegelenk KW - Knorpeldegeneration KW - Débridement KW - Knorpelchirurgie KW - Chondroplastik KW - Register KW - DGOU Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-282882 ER - TY - JOUR A1 - Prasse, Tobias A1 - Stratos, Ioannis A1 - Niehoff, Anja A1 - Christ, Hildegard A1 - Heck, Vincent A1 - Meyer, Carolin A1 - Mittlmeier, Thomas T1 - Bisphenol A-related effects on bone morphology and biomechanical properties in an animal model JF - Toxics N2 - Bisphenol A (BPA), which is contained in numerous plastic products, is known to act as an endocrine-disruptive, toxic, and carcinogenic chemical. This experimental series sought to determine the influence of BPA exposure on the femoral bone architecture and biomechanical properties of male and female Wistar rats. BPA was applied subcutaneously by using osmotic pumps. After 12 weeks, the bones were analyzed by micro-computed tomography (micro-CT) and a three-point bending test. Comparing the female low- and high-dose groups, a significantly greater marrow area (p = 0.047) was identified in the group exposed to a higher BPA concentration. In addition, the trabecular number tended to be higher in the female high-dose group when compared to the low-dose group (p > 0.05). The area moment of inertia also tended to be higher in the male high-dose group when compared to the male low-dose group (p > 0.05). Considering our results, BPA-related effects on the bone morphology in female Wistar rats are osteoanabolic after high-dose exposure, while, in male rats, a tendency toward negative effects on the bone morphology in terms of a reduced cross-sectional cortical area and total area could be demonstrated. KW - bisphenol A KW - endocrine disruption KW - bone morphology KW - micro-computed tomography KW - mechanical property KW - three-point bending Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-262216 SN - 2305-6304 VL - 10 IS - 2 ER - TY - THES A1 - Lörler [geb. Sichermann], Anna Ramona T1 - Versagensanalyse primärer Hüftendoprothesen T1 - Failure analysis of primary hip arthroplasty N2 - Einleitung: Der endoprothetische Hüftgelenksersatz zählt in Deutschland und weltweit zu den am häufigsten praktizierten operativen Eingriffen, wobei die Erfolgszahlen gleichzeitig sehr hoch sind bei stetiger Verbesserung der verwendeten alloplastischen Materialien und angewandten operativen Technik. Daher ist in Zukunft weiter mit einer steigenden Implantationszahl zu rechnen, was das Gesundheitssystem vor weitere sozioökonomische Herausforderungen stellt. Vor diesem Hintergrund ist es bedeutsam, die Ursachen für das Versagen von Hüftendoprothesen weiter im Auge zu behalten und näher zu erläutern. Material und Methoden: Es handelt sich um eine retrospektive Datenanalyse. Eingeschlossen wurden Daten von 785 Patienten, davon 440 weiblich und 345 männlich, die im Zeitraum von 2007 bis 2016 im König-Ludwig-Haus, der orthopädischen Klinik der Universität Würzburg, eine primäre Revision ihrer Hüftendoprothese erhielten. Folgende Daten wurden erhoben: Patientenalter, Standzeit der Prothese, Indexdiagnose, Revisionsgrund, Prothesentyp und Art der Revision. Ergebnisse: Das mittlere Alter bei der Indexdiagnose der Gesamtpopulation betrug 62,2 Jahre, bei der Revision 69,5 Jahre. Es ergab sich eine durchschnittliche Standzeit der Prothese von 88,0 Monaten im Gesamtkollektiv. Die häufigste Indexdiagnose, die zur Implantation der Hüftprothese führte, war Coxarthrose mit 81,4%. Der häufigste Grund für ein Versagen der Prothese war mit 39,4% die Lockerung der Prothese. Zu 67,7% wurde die Prothese zementfrei implantiert. Am häufigsten wurde eine Revision am femoralen Prothesenanteil durchgeführt mit 34,1%. Zusammenfassung: Insgesamt ergab sich aus den Daten, dass die Prothesen eine vergleichbar gute Standzeit im internationalen Vergleich aufwiesen. Es zeigte sich, dass die meisten Versagensursachen bereits früh nach Implantation der primären Prothese in Erscheinung treten, jedoch die Prothesenlockerung als häufigster Grund erst später im Verlauf bedeutsam für die Revisionsendoprothetik wird. N2 - Introduction: Primary hip replacement is one of the most frequently performed surgeries in Germany and international and at once very successful while there is still a continuous improvement in used alloplastic materials and surgical techniques. Therefore, an increasing number of implantations is to be expected for future years, which poses further socio-economic challenges for our healthcare system. So, it is important to keep the reasons for failures of hip prosthesis in mind and explicate them more. Material and methods: Retrospective Data from 785 patients, 440 female and 345 male, were included, who were treated for primary revision surgery of their hip prosthesis during 2007 to 2016 at the orthopedic clinic König-Ludwig-Haus in Würzburg. The following data were collected: patients age, time interval to revision, index diagnosis, reason for revision, type of prosthesis and type of revision. Results: The mean age at the index surgery of the total population was 62.2 years, at revision 69.5 years. The overall time interval to revision was at 88.0 months in the whole population. The most common index diagnosis leading to primary hip arthroplasty was osteoarthritis of the hip with 81.4%. The most common reason for failure of the prosthesis was loosening of the implant with 39.4%. 67.7% of the prosthesis were implanted as cementless type. The most common revision procedure was performed on the femoral implant part with 34.1% Summary: Overall, the data showed that the survival of the implants in comparison to other international studies was similar. It turned out that most causes of failure appeared early after implantation of the primary prosthesis but loosening as the most common reason became relevant after a longer period since primary implantation. KW - Hüftendoprothese KW - Hüftgelenk KW - Hüftgelenkersatz KW - Versagen KW - Revisionsgründe KW - Revisionsursachen KW - Versagensgründe KW - Primäre Hüftprothese KW - Failure KW - Primary hip arthroplasty KW - primary hip prosthesis KW - Reason for revision KW - Revision in hip arthroplasty Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-275331 ER - TY - JOUR A1 - Seefried, Lothar A1 - Genest, Franca A1 - Baumann, Jasmin A1 - Heidemeier, Anke A1 - Meffert, Rainer A1 - Jakob, Franz T1 - Efficacy of Zoledronic Acid in the Treatment of Nonmalignant Painful Bone Marrow Lesions: A Triple‐Blind, Randomized, Placebo‐Controlled Phase III Clinical Trial (ZoMARS) JF - Journal of Bone and Mineral Research N2 - Bone marrow lesions (BML) represent areas of deteriorated bone structure and metabolism characterized by pronounced water‐equivalent signaling within the trabecular bone on magnetic resonance imaging (MRI). BML are associated with repair mechanisms subsequent to various clinical conditions associated with inflammatory and non‐inflammatory injury to the bone. There is no approved treatment for this condition. Bisphosphonates are known to improve bone stability in osteoporosis and other bone disorders and have been used off‐label to treat BML. A randomized, triple‐blind, placebo‐controlled phase III trial was conducted to assess efficacy and safety of single‐dose zoledronic acid (ZOL) 5 mg iv with vitamin D 1000 IU/d as opposed to placebo with vitamin D 1000 IU/d in 48 patients (randomized 2:1) with BML. Primary efficacy endpoint was reduction of edema volume 6 weeks after treatment as assessed by MRI. After treatment, mean BML volume decreased by 64.53% (±41.92%) in patients receiving zoledronic acid and increased by 14.43% (±150.46%) in the placebo group (p = 0.007). A decrease in BML volume was observed in 76.5% of patients receiving ZOL and in 50% of the patients receiving placebo. Pain level (visual analogue scale [VAS]) and all categories of the pain disability index (PDI) improved with ZOL versus placebo after 6 weeks but reconciled after 6 additional weeks of follow‐up. Six serious adverse events occurred in 5 patients, none of which were classified as related to the study drug. No cases of osteonecrosis or fractures occurred. Therefore, single‐dose zoledronic acid 5 mg iv together with vitamin D may enhance resolution of bone marrow lesions over 6 weeks along with reduction of pain compared with vitamin D supplementation only. KW - bone biology KW - osteoporosis KW - bone marrow lesion/edema KW - bisphosphonates KW - zoledronic acid Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-276368 VL - 37 IS - 3 SP - 420 EP - 427 ER - TY - JOUR A1 - Weider, Margareta A1 - Schlagenhauf, Ulrich A1 - Seefried, Lothar T1 - Oral health status of adult hypophosphatasia patients: A cross‐sectional study JF - Journal of Clinical Periodontology N2 - Aim This study evaluated the oral health status of adult patients with hypophosphatasia (HPP). Materials and Methods Parameters of oral health assessment comprised decayed/missing/filled teeth (DMFT) index, probing pocket depth and clinical attachment level (CAL) as well as documentation of tooth loss and periodontal health status according to CCD/AAP criteria. Findings were compared with national reference data (DMS V survey) reporting oral health status in age‐related controls. Within‐group comparisons were made between the HPP patients harbouring one versus two alkaline phosphatase liver/bone/kidney type (ALPL) gene variants. Results Of 80 HPP patients (64 female) with a mean age of 46.4 years (range 24–78) and one (n = 55) or two (n = 18) variants (n = 7 lacking testing) within the ALPL gene, those with two variants displayed substantially higher tooth loss rate (14.0 ± 9.3) than those affected by only one ALPL variant (4.1 ± 5.4), who did not differ substantially from healthy DMS V controls. While DMFT score and severe periodontal diseases (PDs) of HPP patients with one variant only increased with progressing age, the two‐variant sub‐cohort age independently exhibited increased DMFT scores and a higher rate of severe PDs. Conclusions HPP patients affected by two variants of the ALPL gene exhibited a higher risk of periodontitis and tooth loss than the general population, while patients with one variant developed clinically relevant oral disease symptoms with progressing ageing. KW - dental status KW - hypophosphatasia KW - inflammation KW - periodontal disease KW - tooth loss Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-293777 VL - 49 IS - 12 SP - 1253 EP - 1261 ER - TY - JOUR A1 - Arnholdt, Jörg A1 - Kamawal, Yama A1 - Horas, Konstantin A1 - Holzapfel, Boris M. A1 - Gilbert, Fabian A1 - Ripp, Axel A1 - Rudert, Maximilian A1 - Steinert, Andre F. T1 - Accurate implant fit and leg alignment after cruciate-retaining patient-specific total knee arthroplasty JF - BMC Musculoskeletal Disorders N2 - Background For improved outcomes in total knee arthroplasty (TKA) correct implant fitting and positioning are crucial. In order to facilitate a best possible implant fitting and positioning patient-specific systems have been developed. However, whether or not these systems allow for better implant fitting and positioning has yet to be elucidated. For this reason, the aim was to analyse the novel patient-specific cruciate retaining knee replacement system iTotal (TM) CR G2 that utilizes custom-made implants and instruments for its ability to facilitate accurate implant fitting and positioning including correction of the hip-knee-ankle angle (HKA). Methods We assessed radiographic results of 106 patients who were treated with the second generation of a patient-specific cruciate retaining knee arthroplasty using iTotal\(^{TM}\) CR G2 (ConforMIS Inc.) for tricompartmental knee osteoarthritis (OA) using custom-made implants and instruments. The implant fit and positioning as well as the correction of the mechanical axis (hip-knee-ankle angle, HKA) and restoration of the joint line were determined using pre- and postoperative radiographic analyses. Results On average, HKA was corrected from 174.4 degrees +/- 4.6 degrees preoperatively to 178.8 degrees +/- 2.2 degrees postoperatively and the coronal femoro-tibial angle was adjusted on average 4.4 degrees. The measured preoperative tibial slope was 5.3 degrees +/- 2.2 degrees (mean +/- SD) and the average postoperative tibial slope was 4.7 degrees +/- 1.1 degrees on lateral views. The joint line was well preserved with an average modified Insall-Salvati index of 1.66 +/- 0.16 pre- and 1.67 +/- 0.16 postoperatively. The overall accuracy of fit of implant components was decent with a measured medial overhang of more than 1 mm (1.33 mm +/- 0.32 mm) in 4 cases only. Further, a lateral overhang of more than 1 mm (1.8 mm +/- 0.63) (measured in the anterior-posterior radiographs) was observed in 11 cases, with none of the 106 patients showing femoral notching. Conclusion The patient-specific iTotal\(^{TM}\) CR G2 total knee replacement system facilitated a proper fitting and positioning of the implant components. Moreover, a good restoration of the leg axis towards neutral alignment was achieved as planned. Nonetheless, further clinical follow-up studies are necessary to validate our findings and to determine the long-term impact of using this patient- specific system. KW - total knee replacement KW - knee axis KW - patient-specific knee arthroplasty KW - knee osteoarthritis KW - implant positioning Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-230012 VL - 21 ER - TY - JOUR A1 - Fuchs, Konrad F. A1 - Heilig, Philipp A1 - McDonogh, Miriam A1 - Boelch, Sebastian A1 - Gbureck, Uwe A1 - Meffert, Rainer H. A1 - Hoelscher-Doht, Stefanie A1 - Jordan, Martin C. T1 - Cement-augmented screw fixation for calcaneal fracture treatment: a biomechanical study comparing two injectable bone substitutes JF - Journal of Orthopaedic Surgery and Research N2 - Background The role of cement-augmented screw fixation for calcaneal fracture treatment remains unclear. Therefore, this study was performed to biomechanically analyze screw osteosynthesis by reinforcement with either a calcium phosphate (CP)-based or polymethylmethacrylate (PMMA)-based injectable bone cement. Methods A calcaneal fracture (Sanders type IIA) including a central cancellous bone defect was generated in 27 synthetic bones, and the specimens were assigned to 3 groups. The first group was fixed with four screws (3.5 mm and 6.5 mm), the second group with screws and CP-based cement (Graftys (R) QuickSet; Graftys, Aix-en-Provence, France), and the third group with screws and PMMA-based cement (Traumacem (TM) V+; DePuy Synthes, Warsaw, IN, USA). Biomechanical testing was conducted to analyze peak-to-peak displacement, total displacement, and stiffness in following a standardized protocol. Results The peak-to-peak displacement under a 200-N load was not significantly different among the groups; however, peak-to-peak displacement under a 600- and 1000-N load as well as total displacement exhibited better stability in PMMA-augmented screw osteosynthesis compared to screw fixation without augmentation. The stiffness of the construct was increased by both CP- and PMMA-based cements. Conclusion Addition of an injectable bone cement to screw osteosynthesis is able to increase fixation strength in a biomechanical calcaneal fracture model with synthetic bones. In such cases, PMMA-based cements are more effective than CP-based cements because of their inherently higher compressive strength. However, whether this high strength is required in the clinical setting for early weight-bearing remains controversial, and the non-degradable properties of PMMA might cause difficulties during subsequent interventions in younger patients. KW - arthritis KW - bone KW - calcaneus KW - cement KW - fracture KW - fixation KW - osteoporosis KW - sanders KW - screw Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-230336 VL - 15 ER - TY - JOUR A1 - Jakubietz, Rafael G. A1 - Schmidt, Karsten A1 - Holzapfel, Boris M. A1 - Meffert, Rainer H. A1 - Jakubietz, Michael G. T1 - Pedicled perforator flaps for mid-tibial soft tissue reconstruction in medically compromised patients JF - JPRAS Open N2 - Background: The soft tissue of the central pretibial area is difficult to reconstruct often requiring free tissue transfer. Especially medi- cally compromised patients are not ideal candidates for free tissue transfer and may benefit from expeditiously harvested local flaps with limited donor site morbidity. As muscle flaps are rare, pedi- cled flaps based on lateral perforators represent an alternative as the arc of rotation can often be limited to 90 °. Material and Methods: A retrospective analysis of patient data was conducted to identify patients over the age of 60 years with comor- bidities that underwent pretibial soft tissue reconstruction with a single-pedicle perforator flap. Patient demographics, size and cause of the defect, flap dimension, arc of rotation and complications were recorded. Results: Five patients with an average age of 71.4 years were in- cluded. The arc of rotation was 69 °, all flaps healed. There were two recurrences of osteomyelitis. Conclusion: Lateral perforators originating from the anterior tib- ial artery or peroneal artery are adequate source vessels for single pedicled perforator flaps even in medically compromised patients. A perforator located proximal to the defect allows limiting the arcof rotation to less than 90 °, which increases the safety of the flap. Patients benefit from a simple procedure without a microvascular anastomosis and a donor site confined to one extremity KW - Propeller flap KW - Pedicled perforator flap KW - Lower extremity reconstruction KW - Elderly patients Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-229473 VL - 24 ER - TY - JOUR A1 - Lüdemann, Martin A1 - Jakuscheit, Axel A1 - Ewald, Andrea A1 - Frühmann, Leena A1 - Hölscher-Doht, Stefanie A1 - Rudert, Maximilian A1 - von Hertzberg-Boelch, Sebastian Philipp T1 - Influence of Tranexamic Acid on Elution Characteristics and Compressive Strength of Antibiotic-Loaded PMMA-Bone Cement with Gentamicin JF - Materials N2 - Purpose: The topical application of tranexamic acid (TXA) into the joint space during total joint arthroplasty (TJA) with no increase of complications, has been widely reported. We investigated the influence of TXA on antibiotic release, activity of the released antibiotic against a clinical isolate of S. aureus, and compressive strength of a widely used commercially prepared gentamicin-loaded cement brand (PALACOS R + G). Method: 12 bone cement cylinders (diameter and height = 6 and 12 mm, respectively) were molded. After curing in air for at least 1 h, six of the cylinders were completely immersed in 5 mL of fetal calf serum (FCS) and the other six were completely immersed in a solution consisting of 4.9 mL of FCS and 0.1 mL (10 mg) of TXA. Gentamicin elution tests were performed over 7 d. Four hundred µL of the gentamicin eluate were taken every 24 h for the first 7 d without renewing the immersion fluid. The gentamicin concentration was determined in a clinical analyzer using a homogeny enzyme immuno-assay. The antimicrobial activity of the eluate, obtained after day 7, was tested. An agar diffusion test regime was used with Staphylococcus aureus. Bacteria were grown in a LB medium and plated on LB agar plates to get a bacterial lawn. Fifty µL of each eluate were pipetted on 12-mm diameter filter discs, which were placed in the middle of the agar gel. After 24 h of cultivation at 37 °C, the zone of inhibition (ZOI) for each specimen was measured. The compressive strength of the cements was determined per ISO 5833. Results: At each time point in the gentamicin release test, the difference in gentamicin concentration, obtained from specimens immersed in the FCS solution only and those immersed in the FCS + TXA solution was not significant (p = 0.055–0.522). The same trend was seen in each of the following parameters, after 7 d of immersion: (1) Cumulative gentamicin concentration (p < 0.297); (2) gentamicin activity against S. aureus (strongly visible); (3) ZOI size (mostly > 20 mm) (p = 0.631); and (4) compressive strength (p = 0.262). Conclusions: For the PALACOS R + G specimens, the addition of TXA to FCS does not produce significant decreases in gentamicin concentration, in the activity of the gentamicin eluate against a clinical isolate of S. aureus, the zone of inhibition of S. aureus, and in the compressive strength of the cement, after 7 d of immersion in the test solution. KW - gentamicin-loaded poly (methyl methacrylate) bone cement KW - total joint arthroplasty KW - total knee arthroplasty KW - tranexamic acid Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-246236 SN - 1996-1944 VL - 14 IS - 19 ER -