Stuermer, Ewa Klara

[["dc.bibliographiccitation.firstpage","317"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Cells Tissues Organs"],["dc.bibliographiccitation.lastpage","326"],["dc.bibliographiccitation.volume","189"],["dc.contributor.author","Drengk, Anja"],["dc.contributor.author","Zapf, Antonia"],["dc.contributor.author","Stuermer, Ewa Klara"],["dc.contributor.author","Stuermer, Klaus Michael"],["dc.contributor.author","Frosch, Karl-Heinz"],["dc.date.accessioned","2018-11-07T08:34:01Z"],["dc.date.available","2018-11-07T08:34:01Z"],["dc.date.issued","2009"],["dc.description.abstract","Background/Aims: Autologous chondrocyte (CC) transplantation has the disadvantages of requiring two surgical interventions and in vitro expansion of cells, implying the risk of cellular dedifferentiation. Our clinical aim is to develop a one-step procedure for autologous CC transplantation, i.e. harvesting, isolation and reimplantation of CC performed in one single surgical procedure. Platelet-rich plasma (PRP) is a source of autologous growth factors reported to have mitogenic effects. The objective of this study was to test the influence of PRP as an autologous scaffold on freshly isolated CC and mesenchymal stem cells (MSC). Methods: CC and MSC were subjected to two- or three-dimensional (3D) growth systems, either with or without PRP. Chondrogenic differentiation was determined via quantification of collagen type II mRNA and immunohistochemical staining. Results: We observed a proliferative effect for MSCs exposed to PRP in monolayer culture and an increase in the expression of chondrogenic markers when cells are exposed to a 3D environment. CCs exposed to PRP show a decrease in the chondrogenic phenotype with increasing proliferative activity. Conclusion: PRP has a proliferative effect on CCs and MSCs. In a one-step procedure for autologous CC transplantation, this might be an advantage over other scaffold materials, but confirmation in in vivo studies is required. Copyright (C) 2008 S. Karger AG, Basel"],["dc.identifier.doi","10.1159/000151290"],["dc.identifier.isi","000265178600002"],["dc.identifier.pmid","18689989"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9312"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17722"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Karger"],["dc.relation.issn","1422-6405"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Influence of Platelet-Rich Plasma on Chondrogenic Differentiation and Proliferation of Chondrocytes and Mesenchymal Stem Cells"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","331"],["dc.bibliographiccitation.issue","5-6"],["dc.bibliographiccitation.journal","Journal of Molecular Histology"],["dc.bibliographiccitation.lastpage","341"],["dc.bibliographiccitation.volume","40"],["dc.contributor.author","Tezval, Mohammad"],["dc.contributor.author","Tezval, Hossein"],["dc.contributor.author","Dresing, Klaus"],["dc.contributor.author","Stuermer, Ewa Klara"],["dc.contributor.author","Blaschke, Martina"],["dc.contributor.author","Stuermer, Klaus Michael"],["dc.contributor.author","Siggelkow, Heide"],["dc.date.accessioned","2018-11-07T11:23:52Z"],["dc.date.available","2018-11-07T11:23:52Z"],["dc.date.issued","2009"],["dc.description.abstract","Urocortin-1 (UCN) a corticotropin releasing-factor (CRF) related peptide, has been found to be expressed in many different tissues like the central nervous system, the cardiovascular system, adipose tissue, and skeletal muscle. The effects of UCN are mediated via stimulation of CRF-receptors 1 and 2 (CRFR1 and 2, CRFR's) with a high affinity for CRFR2. It has been shown that the CRF-related peptides and CRFR's are involved in the regulation of stress-related endocrine, autonomic and behavioural responses. Using immunocytochemistry, immunohistochemistry and RT-PCR, we now can show the differentiation dependent expression of UCN mRNA and peptide in human mesenchymal progenitor cells (MSCs) directed to the osteoblastic phenotype for the first time. UCN expression was down regulated by TGF-beta and BMP-2 in the early proliferation phase of osteoblast development, whereas dexamethasone (dex) minimally induced UCN gene expression during matrix maturation after 24 h stimulation. Stimulation of MSCs for 28 days with ascorbate/beta-glycerophosphate (asc/bGp) induced UCN gene expression at day 14. This effect was prevented when using 1,25-vitamin D3 or dex in addition. There was no obvious correlation to osteocalcin (OCN) gene expression in these experiments. In MSCs from patients with metabolic bone disease (n = 9) UCN gene expression was significantly higher compared to MSCs from normal controls (n = 6). Human MSCs did not express any of the CRFR's during differentiation to osteoblasts. Our results indicate that UCN is produced during the development of MSCs to osteoblasts and differentially regulated during culture as well as by differentiation factors. The expression is maximal between proliferation and matrix maturation phase. However, UCN does not seem to act on the osteoblast itself as shown by the missing CRFR's. Our results suggest new perspectives on the role of urocortin in human skeletal tissue in health and disease."],["dc.identifier.doi","10.1007/s10735-009-9244-z"],["dc.identifier.isi","000275443300002"],["dc.identifier.pmid","19949969"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/4160"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/56279"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1567-2379"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Differentiation dependent expression of urocortin's mRNA and peptide in human osteoprogenitor cells: influence of BMP-2, TGF-beta-1 and dexamethasone"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","680"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Journal of Orthopaedic Research"],["dc.bibliographiccitation.lastpage","686"],["dc.bibliographiccitation.volume","27"],["dc.contributor.author","Dumont, Clemens"],["dc.contributor.author","Kauer, Fritz"],["dc.contributor.author","Bohr, Stefan"],["dc.contributor.author","Schmidtmann, Ulrich"],["dc.contributor.author","Knopp, Werner"],["dc.contributor.author","Engelhardt, Thomas"],["dc.contributor.author","Stuermer, Ewa Klara"],["dc.contributor.author","Stuermer, Klaus Michael"],["dc.date.accessioned","2018-11-07T08:30:23Z"],["dc.date.available","2018-11-07T08:30:23Z"],["dc.date.issued","2009"],["dc.description.abstract","This article is about the evaluation of possible differences in biomechanical or histomorphological properties of bone healing between saw osteotomy and random fracturing after 6 months. A standardized, 30 oblique monocortical saw osteotomy of sheep tibia was carried out, followed by fracture completion of the opposed cortical bone. Fixation was performed by bridge plating (4.5 mm, LCDCP, broad). X-rays were taken immediately after surgery and at the end of the study. Polychrome fluorescent staining was performed according to a standardized protocol in the 2nd, 4th, 6th, 10th, 14th, 18th, 22th and 26th week. Ten sheep were comprehensively evaluated. Data For stiffness and histomorphology are reported. The average bending stiffness of the operated bone was higher (1.7 (SD 0.3) with plate (MP) vs. 1.5 without plate) than for the intact bone (1.4 (SD 0.2) though no significant differences in bending stiffness were observed (P > 0.05). Fluorescence staining revealed shows numbers of blood vessels and less fragment resorption and remodeling in the osteotomy gap. Bone healing after saw osteotomy shows a very close resemblance to 'normal' fracture healing. However, vascular density, fragment resorption, fragment remodeling, and callus remodeling are reduced at the osteotomy. (C) 2008 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 27:680-686, 2009"],["dc.identifier.doi","10.1002/jor.20795"],["dc.identifier.isi","000265009900017"],["dc.identifier.pmid","18988260"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6273"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/16887"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","John Wiley & Sons Inc"],["dc.relation.issn","0736-0266"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Long-Term Effects of Saw Osteotomy versus Random Fracturing on Bone Healing and Remodeling in a Sheep Tibia Model"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","23"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Calcified Tissue International"],["dc.bibliographiccitation.lastpage","32"],["dc.bibliographiccitation.volume","86"],["dc.contributor.author","Kolios, Leila"],["dc.contributor.author","Hoerster, Ann Kristin"],["dc.contributor.author","Sehmisch, Stephan"],["dc.contributor.author","Malcherek, Marie Christin"],["dc.contributor.author","Rack, Thomas"],["dc.contributor.author","Tezval, Mohammed"],["dc.contributor.author","Seidlova-Wuttke, Dana"],["dc.contributor.author","Wuttke, Wolfgang"],["dc.contributor.author","Stuermer, Klaus Michael"],["dc.contributor.author","Stuermer, Ewa Klara"],["dc.date.accessioned","2018-11-07T08:47:15Z"],["dc.date.available","2018-11-07T08:47:15Z"],["dc.date.issued","2010"],["dc.description.abstract","Osteoporosis is accompanied by predominantly metaphyseal fractures with a delayed and qualitatively reduced healing process. This study addressed the question of whether fracture healing in the context of osteoporosis prophylaxis is improved with estrogen (E) or alendronate (ALN). Thirty-six ovariectomized and 12 sham-operated 12-week-old rats received soy-free (osteoporotic C, sham), E-, or ALN- supplemented diets. After 10 weeks, a metaphyseal tibia osteotomy and standardized T-plate fixation were performed. After a 5-week healing process, the fracture callus was evaluated qualitatively by biomechanical bending test and quantitatively in microradiographic sections. The time course of callus formation was examined using fluorochrome-labeled histological sections. Administration of E improved the biomechanical properties of callus (stiffness [N/mm]: sham: 110.2 +/- A 76.07, C: 41.28 +/- A 33.70, E: 85.72 +/- A 47.24, ALN: 72.07 +/- A 34.68). The resistance to microfracturing seen in E-treated animals was significantly enhanced and even superior to sham (yield load [N] sham: 27.44 +/- A 9.72, C: 21.04 +/- A 12.47, E: 42.85 +/- A 13.74(a dagger), ALN: 25.28 +/- A 6.4(center dot)) ( P < 0.05 vs. sham group, (a dagger) P < 0.05 vs. C group, (aEuro cent) P < 0.05 vs. E group). Trabecular bone in particular was improved, indicating the presence of physiological endosteal bridging (Tr.Dn [%] sham: 10.53 +/- A 18.9, C: 1.01 +/- A 0.14, E: 24.13 +/- A 34.09(a dagger), ALN: 3.99 +/- A 8.3(center dot)). ALN did not help bone healing, as shown by mechanical tests. Compared to the C group, statistically, ALN did not show worse properties. The induction of callus formation under ALN treatment was slightly delayed (Tt.Cl [mm(2)] sham: 3.68 +/- A 0.66, C: 3.44 +/- A 0.42, E: 3.69 +/- A 0.58, ALN: 3.06 +/- A 0.56). Osteoporotic metaphyseal fracture healing was qualitatively and quantitatively improved by E prophylaxis. The process of fracture healing occurred nearly physiologically (shamlike). Notably, ALN hardly improved metaphyseal callus properties when assessed as osteoporosis prophylaxis, but to a lesser extent than E."],["dc.description.sponsorship","DFG [STU 478/2-1]"],["dc.identifier.doi","10.1007/s00223-009-9318-7"],["dc.identifier.isi","000273102700004"],["dc.identifier.pmid","19949941"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/4027"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/20901"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0171-967X"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Do Estrogen and Alendronate Improve Metaphyseal Fracture Healing When Applied as Osteoporosis Prophylaxis?"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","529"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","World Journal of Urology"],["dc.bibliographiccitation.lastpage","534"],["dc.bibliographiccitation.volume","29"],["dc.contributor.author","Tezval, Mohammed"],["dc.contributor.author","Serferaz, G."],["dc.contributor.author","Rack, Thomas"],["dc.contributor.author","Kolios, Leila"],["dc.contributor.author","Sehmisch, Stefan"],["dc.contributor.author","Schmelz, Ulrich"],["dc.contributor.author","Tezval, Hossein"],["dc.contributor.author","Stuermer, Klaus-Michael"],["dc.contributor.author","Stuermer, Ewa Klara"],["dc.date.accessioned","2018-11-07T08:53:48Z"],["dc.date.available","2018-11-07T08:53:48Z"],["dc.date.issued","2011"],["dc.description.abstract","Management of hypogonadism-induced osteoporosis in elderly men is still a challenge. We investigated the short-term effects of parathyroid hormone (PTH) treatments on strength, micro-architecture, and mineral density of trochanteric region of orchiectomized rat femur. Eight-month-old male Sprague-Dawley rats (n = 44) were divided into two groups: (1) orchiectomized (ORX) and (2) sham group. Twelve weeks after orchiectomy, half of the orchiectomized animals were treated with daily subcutaneously injected PTH (0.040 mg/kg/BW) (ORX-PTH) for 5 weeks. The other half remained untreated (ORX). The sham-operated group was divided and treated in the same way (sham, sham-PTH). After 5 weeks, both femurs were excised for biomechanical and histomorphometric analysis, trabecular measurements, mineral content assessment, and immunofluorescence analysis. The femoral trochanteric strength after PTH treatment was enhanced in the breaking test (ORX-F-max = 158.7 N vs. ORX + PTH-F-max = 202 N). Stiffness of treated ORX animals reached nearly the levels observed in untreated sham rats. PTH therapy improved the trabecular connectivity, width, and area (ORX-Tb.Ar = 47.79% vs. ORX + PTH-Tb.Ar = 68.47%, P < 0.05) in the proximal femur. The treated rats showed significantly improved mineral content in ashed femurs (ORX-mineral content = 43.73% vs. ORX + PTH-mineral content = 49.49%) when compared to the untreated animals. A comparison of widths of fluorescence bands in cortical bone of the subtrochanteric cross-sections showed a significant increase in oppositions after the PTH therapy. Our finding supports the hypothesis that PTH therapy seems to be a rational therapy in patients with hypogonadism induced bone loss and improves the bone strength of trochanteric region of rat femur."],["dc.identifier.doi","10.1007/s00345-011-0652-9"],["dc.identifier.isi","000293136200019"],["dc.identifier.pmid","21298272"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7116"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/22511"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1433-8726"],["dc.relation.issn","0724-4983"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Effect of parathyroid hormone on hypogonadism induced bone loss of proximal femur of orchiectomized rat"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","251"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Osteoporosis International"],["dc.bibliographiccitation.lastpage","261"],["dc.bibliographiccitation.volume","21"],["dc.contributor.author","Tezval, Mohammed"],["dc.contributor.author","Stuermer, Ewa Klara"],["dc.contributor.author","Sehmisch, Stefan"],["dc.contributor.author","Rack, Thomas"],["dc.contributor.author","Stary, A."],["dc.contributor.author","Stebener, M."],["dc.contributor.author","Konietschke, Frank"],["dc.contributor.author","Stuermer, Klaus-Michael"],["dc.date.accessioned","2018-11-07T08:46:31Z"],["dc.date.available","2018-11-07T08:46:31Z"],["dc.date.issued","2010"],["dc.description.abstract","We have examined the changes induced in the trochanteric region of femur of ovariectomized rat after administration of estradiol and p.arathyroid hormone. We have developed a reproducible biomechanical test and produced trochanteric fractures to evaluate stiffness and strength of this region in addition to histomorphometry. We investigated the short-term effects of parathyroid hormone (PTH) and estrogen (E) on the strength of the rat trochanteric region in a new mechanical test. Forty-four 3-month-old female Sprague-Dawley rats were ovariectomized and 8 weeks later treated with soy-free diet (C), daily applications of orally supplied E (0.5 mg/kg food) or subcutaneously injected PTH (0.014 mg/kg), for 5 weeks, and an additional untreated group was added as sham-operated. The femurs were examined for biomechanical and histomorphometric changes. Our new mechanical test was validated in a right-left comparison. The PTH treatment induced significantly superior biomechanical results (F (max) = 225.3 N, stiffness = 314.9 N/mm) compared to E (F (max) = 182.9 N, stiffness = 237.2 N/mm), C (F (max) = 166.03 N, stiffness = 235.56 N/mm), and sham (F (max) = 192.1 N, stiffness = 267.2 N/mm). Animals of the PTH group demonstrated a significantly improved trabecular bone structure and area (75.67%) in comparison to the E (61.04%) and C (57.18%) groups. Our new biomechanical test is valid and produces trochanteric fracture. Our results show that the short-term antiosteoporotic effects of PTH are in the trochanteric region of ovariectomized rat superior to E."],["dc.identifier.doi","10.1007/s00198-009-0941-y"],["dc.identifier.isi","000273327000006"],["dc.identifier.pmid","19436940"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/4023"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/20712"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.publisher.place","London"],["dc.relation.issn","0937-941X"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Improvement of trochanteric bone quality in an osteoporosis model after short-term treatment with parathyroid hormone: a new mechanical test for trochanteric region of rat femur"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","33"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Calcified Tissue International"],["dc.bibliographiccitation.lastpage","40"],["dc.bibliographiccitation.volume","88"],["dc.contributor.author","Tezval, Mohammed"],["dc.contributor.author","Biblis, M."],["dc.contributor.author","Sehmisch, Stefan"],["dc.contributor.author","Schmelz, Ulrich"],["dc.contributor.author","Kolios, Leila"],["dc.contributor.author","Rack, Thomas"],["dc.contributor.author","Stuermer, Klaus-Michael"],["dc.contributor.author","Stuermer, Ewa Klara"],["dc.date.accessioned","2018-11-07T09:00:55Z"],["dc.date.available","2018-11-07T09:00:55Z"],["dc.date.issued","2011"],["dc.description.abstract","The treatment and prevention of osteoporosis involve great challenges. Nonpharmacological and supportive therapy procedures, sport, and physical exercises seem to prevent bone loss and improve bone mass. In the present study, we examined the effect of whole-body vertical vibration (WBVV) on femoral intertrochanteric bone quality in the rat osteoporosis model. Sixty female Sprague-Dawley rats, 3-month old, were ovariectomized (OVX) or sham-operated. After 3 months, each group was divided into two subgroups. In one of the subgroups, rats were treated with WBVV at 90 Hz (3.9 g) for 35 days; the second subgroup remained untreated. After killing the animals, biomechanical strength and trabecular bone architecture of the proximal region of femurs were analyzed. New cortical bone appositions and mineral density of femurs were additionally measured. Treatment with WBVV resulted in improved biomechanical properties. Maximal load and stiffness of the intertrochanteric region of femurs after WBVV were significantly enhanced. Maximal load and stiffness in treated OVX animals reached the levels observed in untreated sham rats. WBVV significantly improved all measured histomorphometric parameters in the trabecular area. Treated rats showed significantly improved mineral content in ashed femurs compared to untreated animals. A comparison of widths of fluorescence bands in cortical bone of subtrochanteric cross sections did not show any significant differences between the groups after WBVV. Low-magnitude, high-frequency mechanical stimulation improves bone strength in the proximal femur and may be a possible nonpharmacologic treatment option for postmenopausal osteoporosis."],["dc.identifier.doi","10.1007/s00223-010-9423-7"],["dc.identifier.isi","000286201200005"],["dc.identifier.pmid","21052653"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7296"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/24279"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0171-967X"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Improvement of Femoral Bone Quality After Low-Magnitude, High-Frequency Mechanical Stimulation in the Ovariectomized Rat as an Osteopenia Model"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","147"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","European Journal of Trauma and Emergency Surgery"],["dc.bibliographiccitation.lastpage","152"],["dc.bibliographiccitation.volume","35"],["dc.contributor.author","Stuermer, Ewa Klara"],["dc.contributor.author","Sehmisch, Stephan"],["dc.contributor.author","Frosch, Karl-Heinz"],["dc.contributor.author","Rack, Thomas"],["dc.contributor.author","Dumont, Clemens"],["dc.contributor.author","Tezval, Mohammad"],["dc.contributor.author","Stuermer, Klaus Michael"],["dc.date.accessioned","2018-11-07T08:31:04Z"],["dc.date.available","2018-11-07T08:31:04Z"],["dc.date.issued","2009"],["dc.description.abstract","Rigid plate osteosynthesis with compression is still the treatment of choice for forearm fractures to gain anatomic reposition, provide proper rotation and avoid a bridging callus. Due to necessary operative dissection there is a serious risk for infection and malunion. Based on good clinical results with elastic bridge plating at femur, humerus and tibia, this technique was also started to be used for forearm fractures in our clinic in 1995. In a prospective study, 86 of 124 consecutive patients at the age of 35.2 +/- 14.7 years with 129 diaphyseal fractures of the radius or ulna (AO: 37 type A, 36 type B, 13 type C) were analyzed between January 1998 and December 2003. All fractures were stabilized by bridge plating. Radiographic union and clinical outcome were documented. Of the 129, 122 diaphyseal fractures (94.5%) healed within 10.2 +/- 3.4 weeks without complications (no nerve lesions, nonunion, synostosis callus). One re-osteosynthesis, one secondary lag screw, and five cancellous bone grafts were necessary before final healing. About 79.1% of the patients had a perfect clinical outcome; 17.4% had additional severe injuries of the same arm. Bridge plating, without interfragmentary compression is a reliable surgical procedure even for forearm fractures with low risk of infection and nonunion."],["dc.identifier.doi","10.1007/s00068-008-8002-3"],["dc.identifier.isi","000265340900011"],["dc.identifier.pmid","26814768"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/5045"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17036"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Urban & Vogel"],["dc.relation.issn","1863-9933"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","The Elastic Bridge Plating of the Forearm Fracture: A Prospective Study"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","168"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Calcified Tissue International"],["dc.bibliographiccitation.lastpage","180"],["dc.bibliographiccitation.volume","87"],["dc.contributor.author","Stuermer, Ewa Klara"],["dc.contributor.author","Komrakova, Marina"],["dc.contributor.author","Werner, Carsten"],["dc.contributor.author","Wicke, Michael"],["dc.contributor.author","Kolios, Leila"],["dc.contributor.author","Sehmisch, Stephan"],["dc.contributor.author","Tezval, Mohammad"],["dc.contributor.author","Utesch, Clara"],["dc.contributor.author","Mangal, Orzala"],["dc.contributor.author","Zimmer, Sebastian"],["dc.contributor.author","Dullin, Christian"],["dc.contributor.author","Stuermer, Klaus-Michael"],["dc.date.accessioned","2018-11-07T08:40:40Z"],["dc.date.available","2018-11-07T08:40:40Z"],["dc.date.issued","2010"],["dc.description.abstract","This study investigated the effect of vibration on bone healing and muscle in intact and ovariectomized rats. Thirty ovariectomized (at 3 months of age) and 30 intact 5-month old female Sprague-Dawley rats underwent bilateral metaphyseal osteotomy of tibia. Five days later, half of the ovariectomized and of the intact rats were exposed to whole-body vertical vibration (90 Hz, 0.5 mm, 4 x g acceleration) for 15 min twice a day during 30 days. The other animals did not undergo vibration. After decapitation of rats, one tibia was used for computed tomographic, biomechanical, and histological analyses; the other was used for gene expression analyses of alkaline phosphatase (Alp), osteocalcin (Oc), tartrate-resistant acid phosphatase 1, and insulinlike growth factor 1. Serum Alp and Oc were measured. Mitochondrial activity, fiber area and distribution, and capillary densities were analyzed in M. gastrocnemius and M. longissimus. We found that vibration had no effect on body weight and food intake, but it improved cortical and callus densities (97 vs. 99%, 72 vs. 81%), trabecular structure (9 vs. 14 trabecular nodes), blood supply (1.7 vs. 2.1 capillaries/fiber), and oxidative metabolism (17 vs. 23 pmol O(2)/s/mg) in ovariectomized rats. Vibration generally increased muscle fiber size. Tibia biomechanical properties were diminished after vibration. Oc gene expression was higher in vibrated rats. Serum Alp was increased in ovariectomized rats. In ovariectomized rats, vibration resulted in an earlier bridging; in intact rats, callus bridging occurred later after vibration. The chosen vibration regimen (90 Hz, 0.5 mm, 4 x g acceleration, 15 min twice a day) was effective in improving musculoskeletal tissues in ovariectomized rats but was not optimal for fracture healing."],["dc.description.sponsorship","German Research Foundation (DFG) [STU 478/3-1]"],["dc.identifier.doi","10.1007/s00223-010-9381-0"],["dc.identifier.isi","000280062200008"],["dc.identifier.pmid","20532877"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/4972"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/19283"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0171-967X"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Musculoskeletal Response to Whole-Body Vibration During Fracture Healing in Intact and Ovariectomized Rats"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","20"],["dc.bibliographiccitation.journal","The Open Bone Journal"],["dc.bibliographiccitation.lastpage","26"],["dc.bibliographiccitation.volume","4"],["dc.contributor.author","Komrakova, Marina"],["dc.contributor.author","Stuermer, Ewa K."],["dc.contributor.author","Sturm, Armin"],["dc.contributor.author","Schmelz, Ulrich"],["dc.contributor.author","Tezval, Mohammad"],["dc.contributor.author","Stuermer, Klaus M."],["dc.contributor.author","Sehmisch, Stephan"],["dc.date.accessioned","2019-07-09T11:53:38Z"],["dc.date.available","2019-07-09T11:53:38Z"],["dc.date.issued","2012"],["dc.description.abstract","Daily application of parathyroid hormone (PTH 1-34) is used for treatment of osteoporosis. It was investigated whether orchiectomy-induced osteoporotic changes in spine can be ameliorated by every 48h administration of PTH in aged male rats. Eight-month-old male Sprague-Dawley rats were sham operated (n=24) or orchiectomized (Orx, n=36) and maintained untreated over 12 weeks. Thereafter, both tibia underwent transverse metaphyseal osteotomy (Komrakova et al. 2011, J Endocrinol; 209:9-19) and rats were divided into 5 groups treated s.c. as follows: 1) sham vehicle; 2) sham PTH every 24h (PTH/24h); 3) Orx vehicle; 4) Orx PTH/24h; 5) Orx PTH every 48h (PTH/48h). PTH dosage was 40 􀀁g/kg BW per injection. After 5 weeks, lumbar vertebral bodies were used in computed tomographical, biomechanical, histomorphological, ashing and gene expression analyses. Cortical and trabecular densities, biomechanical properties, serum osteocalcin level increased significantly after PTH treatments in all groups (yield load, sham: 232+17N, sham PTH/24h: 376+12N, Orx: 239+16N, Orx PTH/24h: 324+31N, Orx PTH/48h: 297+17N). Bone inorganic weight enhanced after daily PTH application in Orx rats. Bone gene expression did not differ (P>0.05) among the groups. Both PTH administration regimes (24h and 48h) improved impaired bone structure in osteopenic rats. Every 48h application was less effective, however, it improved bone properties to the level observed in healthy (sham) rats. Considering limitation of daily treatments known in humans, these results may be useful for further clinical studies."],["dc.identifier.doi","10.2174/1876525401204010020"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7843"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/60468"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","1876-5254"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","610"],["dc.title","Efficiency of 48h vs. 24h Injection of Parathyroid Hormone for Amelioration of Osteopenic Spine Properties in Male Rats"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]