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Potasso L, Perakakis N, Lamprinou A, Arendt LC, Peter A, Rasenack R, Päth G, Seufert J, Laubner K. The T risk allele of TCF7L2 rs 7903146 is associated with impaired insulin secretion rather than insulin resistance: A clinical pilot study in women with a history of gestational diabetes (GDM). DIABETOL STOFFWECHS 2018. [DOI: 10.1055/s-0038-1641920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- L Potasso
- Uniklinik Freiburg, Innere II, Freiburg, Germany
| | - N Perakakis
- Uniklinik Freiburg, Innere II, Freiburg, Germany
| | - A Lamprinou
- University Hospital Tübingen, Tübingen, Germany
- Institut für Diabetes-Forschung und Metabolische Erkrankungen (IDM) – Metabolic Imaging des Helmholtz-Zentrums München an der Universität Tübingen, Tübingen, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - LC Arendt
- Uniklinik Freiburg, Innere II, Freiburg, Germany
| | - A Peter
- University Hospital Tübingen, Tübingen, Germany
- Institut für Diabetes-Forschung und Metabolische Erkrankungen (IDM) – Metabolic Imaging des Helmholtz-Zentrums München an der Universität Tübingen, Tübingen, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - R Rasenack
- Uniklinik Freiburg, Division of Perinatology, Freiburg, Germany
| | - G Päth
- Uniklinik Freiburg, Innere II, Freiburg, Germany
| | - J Seufert
- Uniklinik Freiburg, Innere II, Freiburg, Germany
| | - K Laubner
- Uniklinik Freiburg, Innere II, Freiburg, Germany
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Schmaranzer F, Arendt L, Lerch TD, Steppacher SD, Nuss K, Wolfer N, Dawson HE, von Rechenberg B, Kircher PR, Tannast M. Femoral osteochondroplasty can be performed effectively without the risk of avascular necrosis or femoral neck fractures in an experimental ovine FAI model. Osteoarthritis Cartilage 2018; 26:128-137. [PMID: 29061495 DOI: 10.1016/j.joca.2017.10.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 10/05/2017] [Accepted: 10/10/2017] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The experimental induction of cam-type femoroacetabular impingement (FAI) in sheep is established. To tap the full potential of this ovine model, one should be able to perform a femoral osteochondroplasty safely. This study was based on previous cadaver experiments on the blood supply to the ovine femoral head and on the biomechanical strength of the proximal femur following offset creation. We hypothesized that offset creation in this ovine FAI model does not lead to (1) avascular necrosis (AVN) of the ovine femoral head or (2) iatrogenic femoral neck fractures and (3) can be performed effectively. DESIGN In this experimental, controlled, prospective study nine sheep underwent unilateral FAI induction through an intertrochanteric, varus osteotomy. Seventy days following FAI induction, femoral osteochondroplasty was performed. Sheep were sacrificed after another 140 days. Radiographs, computed tomography (CT) scans and MRI were acquired. Histologic samples were stained with hematoxylin-eosin. (1) The multimodal Association Research Circulation Osseous (ARCO) classification was used for assessment of AVN. (2) Femoral neck fractures were assessed with the multimodal imaging approach. (3) Pre- and postoperative (=after sacrifice) alpha angles and femoral neck diameters were compared. RESULTS (1) No signs for AVN according to the ARCO classification or (2) for femoral neck fractures were detected. (3) Mean alpha angles and femoral neck diameters decreased significantly (p < 0.001) superiorly by at least 30° respectively 4 mm after the offset creation. CONCLUSIONS Femoral osteochondroplasty can be performed effectively and without the risk of AVN or femoral neck fractures in this ovine FAI model.
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Affiliation(s)
- F Schmaranzer
- Department of Orthopaedic Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
| | - L Arendt
- Musculoskeletal Research Unit (MSRU), Equine Hospital, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland
| | - T D Lerch
- Department of Orthopaedic Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - S D Steppacher
- Department of Orthopaedic Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - K Nuss
- Musculoskeletal Research Unit (MSRU), Equine Hospital, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland
| | - N Wolfer
- Musculoskeletal Research Unit (MSRU), Equine Hospital, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland
| | - H E Dawson
- Institute of Pathology, University of Bern, Bern, Switzerland
| | - B von Rechenberg
- Musculoskeletal Research Unit (MSRU), Equine Hospital, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland
| | - P R Kircher
- Department of Small Animals, Division of Diagnostic Imaging, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland
| | - M Tannast
- Department of Orthopaedic Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; Musculoskeletal Research Unit (MSRU), Equine Hospital, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland
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