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Lauer H, Prahm C, Thiel JT, Kolbenschlag J, Daigeler A, Hercher D, Heinzel JC. The Grasping Test Revisited: A Systematic Review of Functional Recovery in Rat Models of Median Nerve Injury. Biomedicines 2022; 10:biomedicines10081878. [PMID: 36009423 PMCID: PMC9405835 DOI: 10.3390/biomedicines10081878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 07/31/2022] [Accepted: 08/01/2022] [Indexed: 11/16/2022] Open
Abstract
The rat median nerve model is a well-established and frequently used model for peripheral nerve injury and repair. The grasping test is the gold-standard to evaluate functional recovery in this model. However, no comprehensive review exists to summarize the course of functional recovery in regard to the lesion type. According to PRISMA-guidelines, research was performed, including the databases PubMed and Web of Science. Groups were: (1) crush injury, (2) transection with end-to-end or with (3) end-to-side coaptation and (4) isogenic or acellular allogenic grafting. Total and respective number, as well as rat strain, type of nerve defect, length of isogenic or acellular allogenic allografts, time at first signs of motor recovery (FSR) and maximal recovery grasping strength (MRGS), were evaluated. In total, 47 articles met the inclusion criteria. Group I showed earliest signs of motor recovery. Slow recovery was observable in group III and in graft length above 25 mm. Isografts recovered faster compared to other grafts. The onset and course of recovery is heavily dependent from the type of nerve injury. The grasping test should be used complementary in addition to other volitional and non-volitional tests. Repetitive examinations should be planned carefully to optimize assessment of valid and reliable data.
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Affiliation(s)
- Henrik Lauer
- Department of Hand-, Plastic, Reconstructive and Burn Surgery, BG Unfallklinik Tuebingen, University of Tuebingen, Schnarrenbergstraße 95, 72076 Tuebingen, Germany; (H.L.); (C.P.); (J.T.T.); (J.K.); (A.D.)
| | - Cosima Prahm
- Department of Hand-, Plastic, Reconstructive and Burn Surgery, BG Unfallklinik Tuebingen, University of Tuebingen, Schnarrenbergstraße 95, 72076 Tuebingen, Germany; (H.L.); (C.P.); (J.T.T.); (J.K.); (A.D.)
| | - Johannes Tobias Thiel
- Department of Hand-, Plastic, Reconstructive and Burn Surgery, BG Unfallklinik Tuebingen, University of Tuebingen, Schnarrenbergstraße 95, 72076 Tuebingen, Germany; (H.L.); (C.P.); (J.T.T.); (J.K.); (A.D.)
| | - Jonas Kolbenschlag
- Department of Hand-, Plastic, Reconstructive and Burn Surgery, BG Unfallklinik Tuebingen, University of Tuebingen, Schnarrenbergstraße 95, 72076 Tuebingen, Germany; (H.L.); (C.P.); (J.T.T.); (J.K.); (A.D.)
| | - Adrien Daigeler
- Department of Hand-, Plastic, Reconstructive and Burn Surgery, BG Unfallklinik Tuebingen, University of Tuebingen, Schnarrenbergstraße 95, 72076 Tuebingen, Germany; (H.L.); (C.P.); (J.T.T.); (J.K.); (A.D.)
| | - David Hercher
- Ludwig Boltzmann Institute for Traumatology, The Research Center in Cooperation with AUVA, Donaueschingenstraße 13, 1200 Vienna, Austria;
- Austrian Cluster for Tissue Regeneration, 1200 Vienna, Austria
| | - Johannes C. Heinzel
- Department of Hand-, Plastic, Reconstructive and Burn Surgery, BG Unfallklinik Tuebingen, University of Tuebingen, Schnarrenbergstraße 95, 72076 Tuebingen, Germany; (H.L.); (C.P.); (J.T.T.); (J.K.); (A.D.)
- Correspondence:
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Camponogara F, Zanotti F, Trentini M, Tiengo E, Zanolla I, Pishavar E, Soliani E, Scatto M, Gargiulo P, Zambito Y, De Luca S, Ferroni L, Zavan B. Biomaterials for Regenerative Medicine in Italy: Brief State of the Art of the Principal Research Centers. Int J Mol Sci 2022; 23:8245. [PMID: 35897825 PMCID: PMC9368060 DOI: 10.3390/ijms23158245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 06/30/2022] [Accepted: 07/22/2022] [Indexed: 02/01/2023] Open
Abstract
Regenerative medicine is the branch of medicine that effectively uses stem cell therapy and tissue engineering strategies to guide the healing or replacement of damaged tissues or organs. A crucial element is undoubtedly the biomaterial that guides biological events to restore tissue continuity. The polymers, natural or synthetic, find wide application thanks to their great adaptability. In fact, they can be used as principal components, coatings or vehicles to functionalize several biomaterials. There are many leading centers for the research and development of biomaterials in Italy. The aim of this review is to provide an overview of the current state of the art on polymer research for regenerative medicine purposes. The last five years of scientific production of the main Italian research centers has been screened to analyze the current advancement in tissue engineering in order to highlight inputs for the development of novel biomaterials and strategies.
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Affiliation(s)
- Francesca Camponogara
- Translational Medicine Department, University of Ferrara, 44121 Ferrara, Italy; (F.C.); (F.Z.); (M.T.); (E.T.); (E.P.)
| | - Federica Zanotti
- Translational Medicine Department, University of Ferrara, 44121 Ferrara, Italy; (F.C.); (F.Z.); (M.T.); (E.T.); (E.P.)
| | - Martina Trentini
- Translational Medicine Department, University of Ferrara, 44121 Ferrara, Italy; (F.C.); (F.Z.); (M.T.); (E.T.); (E.P.)
| | - Elena Tiengo
- Translational Medicine Department, University of Ferrara, 44121 Ferrara, Italy; (F.C.); (F.Z.); (M.T.); (E.T.); (E.P.)
| | - Ilaria Zanolla
- Medical Sciences Department, University of Ferrara, 44121 Ferrara, Italy;
| | - Elham Pishavar
- Translational Medicine Department, University of Ferrara, 44121 Ferrara, Italy; (F.C.); (F.Z.); (M.T.); (E.T.); (E.P.)
| | - Elisa Soliani
- Bioengineering Department, Imperial College London, London SW7 2BX, UK;
| | - Marco Scatto
- Department of Molecular Sciences and Nanosystems, Ca’ Foscari University of Venice, Via Torino 155, 30172 Venezia, Italy;
| | - Paolo Gargiulo
- Institute for Biomedical and Neural Engineering, Reykjavík University, 101 Reykjavík, Iceland;
- Department of Science, Landspítali, 101 Reykjavík, Iceland
| | - Ylenia Zambito
- Chemical Department, University of Pisa, 56124 Pisa, Italy;
| | - Stefano De Luca
- Unit of Naples, Institute of Applied Sciences and Intelligent Systems, National Research Council, Via P. Castellino 111, 80131 Napoli, Italy;
| | - Letizia Ferroni
- Maria Cecilia Hospital, GVM Care & Research, 48033 Cotignola, Italy;
| | - Barbara Zavan
- Translational Medicine Department, University of Ferrara, 44121 Ferrara, Italy; (F.C.); (F.Z.); (M.T.); (E.T.); (E.P.)
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Evaluation of Zirconia and High Performance Polymer Abutment Surface Roughness and Stress Concentration for Implant-Supported Fixed Dental Prostheses. COATINGS 2022. [DOI: 10.3390/coatings12020238] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Background: The High Performance Polymer is a based polymer biomaterial that was introduced as dental material to manufacture dentures superstructure and dental implants abutments. However, its surface characteristics and stress state still need to be properly described. The aim of this study was to compare the surface characteristics of a High Performance Polymer (Bio-HPP, Bredent, Senden, Germany) for computer-aided design and computer-aided manufacturing (CAD/CAM) milling and a Zirconia (Zirkonzahn, Steger, Ahrntal, Italy). Methods: The abutments surface roughness (Ra) was evaluated for each abutment material (N = 12) using a confocal laser microscope. Data were evaluated using One-Way ANOVA and Tukey tests (p < 0.05). In addition, a finite element analysis software was used to present stress measurement data as stress maps with 100 N loading. Results were generated according to Von-mises stress criteria and stress peaks were recorded from each structure. Results: Results showed a mean Ra of 0.221 ± 0.09 μm for Bio-HPP and 1.075 ± 0.24 μm for Zirconia. Both surface profiles presented a smooth characteristic regardless the measurement axis. The stress peaks from implant fixture and screw were not affected by the abutment material, however the high performance polymer showed the highest stress magnitude for the abutment region. Conclusions: Comparing the present results with the literature it is suggested that the CAD/CAM High Performance Polymer abutments present an adequate surface roughness with acceptable values of stress.
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Crosio A, Ronchi G, Fornasari BE, Odella S, Raimondo S, Tos P. Experimental Methods to Simulate and Evaluate Postsurgical Peripheral Nerve Scarring. J Clin Med 2021; 10:jcm10081613. [PMID: 33920209 PMCID: PMC8070420 DOI: 10.3390/jcm10081613] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/30/2021] [Accepted: 04/07/2021] [Indexed: 01/09/2023] Open
Abstract
As a consequence of trauma or surgical interventions on peripheral nerves, scar tissue can form, interfering with the capacity of the nerve to regenerate properly. Scar tissue may also lead to traction neuropathies, with functional dysfunction and pain for the patient. The search for effective antiadhesion products to prevent scar tissue formation has, therefore, become an important clinical challenge. In this review, we perform extensive research on the PubMed database, retrieving experimental papers on the prevention of peripheral nerve scarring. Different parameters have been considered and discussed, including the animal and nerve models used and the experimental methods employed to simulate and evaluate scar formation. An overview of the different types of antiadhesion devices and strategies investigated in experimental models is also provided. To successfully evaluate the efficacy of new antiscarring agents, it is necessary to have reliable animal models mimicking the complications of peripheral nerve scarring and also standard and quantitative parameters to evaluate perineural scars. So far, there are no standardized methods used in experimental research, and it is, therefore, difficult to compare the results of the different antiadhesion devices.
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Affiliation(s)
- Alessandro Crosio
- UO Microchirurgia e Chirurgia della Mano, Ospedale Gaetano Pini, Piazza Andrea Ferrari 1, 20122 Milano, Italy; (A.C.); (S.O.); (P.T.)
| | - Giulia Ronchi
- Department of Clinical and Biological Sciences, Neuroscience Institute of the “Cavalieri Ottolenghi” Foundation (NICO), University of Turin, Regione Gonzole 10, 10043 Orbassano, Italy; (G.R.); (B.E.F.)
| | - Benedetta Elena Fornasari
- Department of Clinical and Biological Sciences, Neuroscience Institute of the “Cavalieri Ottolenghi” Foundation (NICO), University of Turin, Regione Gonzole 10, 10043 Orbassano, Italy; (G.R.); (B.E.F.)
| | - Simonetta Odella
- UO Microchirurgia e Chirurgia della Mano, Ospedale Gaetano Pini, Piazza Andrea Ferrari 1, 20122 Milano, Italy; (A.C.); (S.O.); (P.T.)
| | - Stefania Raimondo
- Department of Clinical and Biological Sciences, Neuroscience Institute of the “Cavalieri Ottolenghi” Foundation (NICO), University of Turin, Regione Gonzole 10, 10043 Orbassano, Italy; (G.R.); (B.E.F.)
- Correspondence: ; Tel.: +39-011-670-5433
| | - Pierluigi Tos
- UO Microchirurgia e Chirurgia della Mano, Ospedale Gaetano Pini, Piazza Andrea Ferrari 1, 20122 Milano, Italy; (A.C.); (S.O.); (P.T.)
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Costa AL, Papadopulos N, Porzionato A, Natsis K, Bassetto F, Tiengo C, Giunta R, Soldado F, Bertelli JA, Baeza AR, Battiston B, Titolo P, Tos P, Radtke C, Aszmann O, Moschella F, Cordova A, Toia F, Perrotta RE, Ronchi G, Geuna S, Colonna MR. Studying nerve transfers: Searching for a consensus in nerve axons count. J Plast Reconstr Aesthet Surg 2021; 74:2731-2736. [PMID: 33962889 DOI: 10.1016/j.bjps.2021.03.064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 03/13/2021] [Indexed: 11/26/2022]
Abstract
Axonal count is the base for efficient nerve transfer; despite its capital importance, few studies have been published on human material, most research approaches being performed on experimental animal models of nerve injury. Thus, standard analysis methods are still lacking. Quantitative data obtained have to be reproducible and comparable with published data by other research groups. To share results with the scientific community, the standardization of quantitative analysis is a fundamental step. For this purpose, the experiences of the Italian, Austrian, German, Greek, and Iberian-Latin American groups have been compared with each other and with the existing literature to reach a consensus in the fiber count and draw up a protocol that can make future studies from different centers comparable. The search for a standardization of the methodology was aimed to reduce all the factors that are associated with an increase in the variability of the results. All the preferential methods to be used have been suggested. On the other hand, alternative methods and different methods have been identified to achieve the same goal, which in our experience are completely comparable; therefore, they can be used indifferently by the different centers according to their experience and availability.
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Affiliation(s)
- Alfio Luca Costa
- Department of Human Pathology of the Adult, the Child and the Adolescent, University of Messina, Via Consolare Valeria 1, 98125 Messina, Italy.
| | - Nikolaos Papadopulos
- Department of Plastic Surgery and Burns, Alexandroupoli University Hospital, Democritus University of Thace, Alexandroupoli, Greece
| | - Andrea Porzionato
- Department of Neurosciences, Institute of Human Anatomy, University of Padova, Padova, Italy
| | - Konstantinos Natsis
- Department of Anatomy and Surgical Anatomy, (Chairperson: Professor Dr. K. NATSIS), Medical School, Aristotle University of Thessaloniki, Greece
| | - Franco Bassetto
- Clinic of Plastic Surgery, Padova University Hospital, Padova, Italy
| | - Cesare Tiengo
- Clinic of Plastic Surgery, Padova University Hospital, Padova, Italy
| | - Riccardo Giunta
- Division of Hand, Plastic and Aesthetic Surgery, Ludwig-Maximilians-University (LMU), Pettenkoferstraße. 8a, 80336 Munich, Germany
| | - Francisco Soldado
- Pediatric Upper Extremity Surgery and Microsurgery, Vithas San Jose Hospital, Vitoria and Hospital HM nens, Barcelona, Spain
| | - Jayme Augusto Bertelli
- Department of Orthopedic Surgery, Governador Celso Ramos Hospital, Florianópolis, Brazil
| | - Alfonso Rodrìguez Baeza
- Unit of Human Anatomy and Embryology, Department of Morphological Sciences, Faculty of Medicine, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Bellaterra, 08193 Barcelona, Spain
| | - Bruno Battiston
- Human Anatomy Unit, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Paolo Titolo
- Human Anatomy Unit, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Pierluigi Tos
- Azienda Ospedaliero-Universitaria Citta della Salute e della Scienza di Torino, Depatment of Traumatology, Turin, Italy
| | - Christine Radtke
- Hand Surgery and Reconstructive Microsurgery Unit, ASST G Pini-CTO, Milano, Italy
| | - Oscar Aszmann
- Hand Surgery and Reconstructive Microsurgery Unit, ASST G Pini-CTO, Milano, Italy
| | - Francesco Moschella
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Adriana Cordova
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Francesca Toia
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Rosario Emanuele Perrotta
- Section of Plastic and Reconstructive Surgery. Department of Surgical, Oncological and Oral Sciences. University of Palermo, Italy
| | - Guilia Ronchi
- Department of Plastic and Reconstructive Surgery, University of Catania, Catania 95100, Italy; Department of Clinical and Biological Sciences, University of Torino, Turin, Italy
| | - Stefano Geuna
- Department of Plastic and Reconstructive Surgery, University of Catania, Catania 95100, Italy
| | - Michele Rosario Colonna
- Department of Human Pathology of the Adult, the Child and the Adolescent, University of Messina, Via Consolare Valeria 1, 98125 Messina, Italy
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Gao YB, Liu ZG, Lin GD, Guo Y, Chen L, Huang BT, Yin YB, Yang C, Sun LY, Rong YB, Chen S. Safety and efficacy of a nerve matrix membrane as a collagen nerve wrapping: a randomized, single-blind, multicenter clinical trial. Neural Regen Res 2021; 16:1652-1659. [PMID: 33433497 PMCID: PMC8323693 DOI: 10.4103/1673-5374.303040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
A new nerve matrix membrane derived from decellularized porcine nerves has been shown to retain the major extracellular matrix components, and to be effective in preventing adhesion between the nerve anastomosis sites and the surrounding tissues in a rat sciatic nerve transection model, thereby enhancing regeneration of the nerve. The effectiveness of the membrane may be attributed to its various bioactive components. In this prospective, randomized, single-blind, parallel-controlled multicenter clinical trial, we compared the safety and efficacy of the new nerve matrix membrane with a previously approved bovine tendon-derived type I collagen nerve wrapping. A total of 120 patients with peripheral nerve injury were recruited from Beijing Jishuitan Hospital, The First Bethune Hospital of Jilin University, and Yantai Yuhuangding Hospital, China. The patients were randomly assigned to undergo end-to-end and tension-free neurorrhaphy with nerve matrix membrane (n = 60, 52 male, 8 female, mean age 41.34 years, experimental group) or tendon-derived collagen nerve wrapping (n = 60, 42 male, 18 female, mean age 40.17 years, control group). Patients were followed-up at 14 ± 5, 30 ± 7, 90 ± 10 and 180 ± 20 days after the operation. Safety evaluation included analyses of local and systemic reactions, related laboratory tests, and adverse reactions. Efficacy evaluation included a static 2-point discrimination test, a moving 2-point discrimination test, and a Semmes–Weinstein monofilament examination. Sensory nerve function was evaluated with the British Medical Research Council Scale and Semmes–Weinstein monofilament examination. The ratio (percentage) of patients with excellent to good results in sensory nerve recovery 180 ± 20 days after the treatment was used as the primary effectiveness index. The percentages of patients with excellent to good results in the experimental and control groups were 98.00% and 94.44%, respectively, with no significant difference between the two groups. There were no significant differences in the results of routine blood tests, liver and renal function tests, coagulation function tests, or immunoglobulin tests at 14 and 180 days postoperatively between the two groups. These findings suggest that the novel nerve matrix membrane is similar in efficacy to the commercially-available bovine-derived collagen membrane in the repair of peripheral nerve injury, and it may therefore serve as an alternative in the clinical setting. The clinical trial was approved by the Institutional Ethics Committee of Beijing Jishuitan Hospital, China (approval No. 20160902) on October 8, 2016, the Institutional Ethics Committee of the First Bethune Hospital of Jilin University, China (approval No. 160518-088) on December 14, 2016, and the Institutional Ethics Committee of Yantai Yuhuangding Hospital, China (approval No. 2016-10-01) on December 9, 2016. The clinical trial was registered with the Chinese Clinical Trial Registry (registration number: ChiCTR2000033324) on May 28, 2020.
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Affiliation(s)
- Yong-Bin Gao
- Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - Zhi-Gang Liu
- Department of Hand Surgery, The First Bethune Hospital of Jilin University, Changchun, Jilin Province, China
| | - Guo-Dong Lin
- Department of Hand and Foot Surgery, Yantai Yuhuangding Hospital, Yantai, Shandong Province, China
| | - Yang Guo
- Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - Lei Chen
- Department of Hand Surgery, The First Bethune Hospital of Jilin University, Changchun, Jilin Province, China
| | - Bo-Tao Huang
- Department of Hand and Foot Surgery, Yantai Yuhuangding Hospital, Yantai, Shandong Province, China
| | - Yao-Bin Yin
- Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - Chen Yang
- Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - Li-Ying Sun
- Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - Yan-Bo Rong
- Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - Shanlin Chen
- Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
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