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Kmecick M, Vieira da Costa MC, Ferreira EDC, Prodocimo MM, Ortolani-Machado CF. Critical Evaluation of Embedding Media for Histological Studies of Early Stages of Chick Embryo Development. Methods Protoc 2023; 6:mps6020038. [PMID: 37104020 PMCID: PMC10146326 DOI: 10.3390/mps6020038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/17/2023] [Accepted: 03/31/2023] [Indexed: 04/07/2023] Open
Abstract
A histological examination is an important tool in embryology, developmental biology, and correlated areas. Despite the amount of information available about tissue embedding and different media, there is a lack of information regarding best practices for embryonic tissues. Embryonic tissues are considered fragile structures, usually small in size, and frequently challenging to position correctly in media for the subsequent histological steps. Here, we discuss the embedding media and procedures that provided us with appropriate preservation of tissue and easier orientation of embryos at early development. Fertilized Gallus gallus eggs were incubated for 72 h, collected, fixed, processed, and embedded with paraplast, polyethylene glycol (PEG), or historesin. These resins were compared by the precision of tissue orientation, the preview of the embryos in the blocks, microtomy, contrast in staining, preservation, average time, and cost. Paraplast and PEG did not allow correct embryo orientation, even with agar–gelatin pre-embedded samples. Additionally, structural maintenance was hindered and did not allow detailed morphological assessment, presenting tissue shrinkage and disruption. Historesin provided precise tissue orientation and excellent preservation of structures. Assessing the performance of the embedding media contributes significantly to future developmental research, optimizing the processing of embryo specimens and improving results.
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Affiliation(s)
- Melyssa Kmecick
- Laboratory of Embryotoxicology, Department of Cell Biology, Biological Sciences Sector, Federal University of Paraná, Av. Cel. Francisco Heráclito dos Santos, 100, Curitiba 81.531-980, PR, Brazil
| | - Mariliza Cristine Vieira da Costa
- Laboratory of Embryotoxicology, Department of Cell Biology, Biological Sciences Sector, Federal University of Paraná, Av. Cel. Francisco Heráclito dos Santos, 100, Curitiba 81.531-980, PR, Brazil
| | - Eduardo da Costa Ferreira
- Laboratory of Embryotoxicology, Department of Cell Biology, Biological Sciences Sector, Federal University of Paraná, Av. Cel. Francisco Heráclito dos Santos, 100, Curitiba 81.531-980, PR, Brazil
| | - Maritana Mela Prodocimo
- Laboratory of Cell Toxicology, Department of Cell Biology, Biological Sciences Sector, Federal University of Paraná, Av. Cel. Francisco Heráclito dos Santos, 100, Curitiba 81.531-980, PR, Brazil
| | - Claudia Feijó Ortolani-Machado
- Laboratory of Embryotoxicology, Department of Cell Biology, Biological Sciences Sector, Federal University of Paraná, Av. Cel. Francisco Heráclito dos Santos, 100, Curitiba 81.531-980, PR, Brazil
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García MFM, Martin A, Fushimi S, Feldman S, Pastorino NF, Juárez JN, Jammal MV, Missana LR. Optimization for Bone Samples Embedded in Methyl Methacrylate. J HARD TISSUE BIOL 2022. [DOI: 10.2485/jhtb.31.181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- María F Moreno García
- Experimental Pathology, Diagnostic & Tissue Engineering Laboratory, Oral Pathology Department, Dental School, Tucumán University
| | - Alfredo Martin
- Surgical Techniques Department, Agronomy and Animal Husbandry School, Tucumán University
| | - Shigeko Fushimi
- Department of Oral Pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
| | - Sara Feldman
- Osteoarticular Biology, Tissue Engineering and Emerging Therapies Laboratory (LABOATEM), Medical Sciences School, Rosario University
| | - Nina F Pastorino
- Experimental Pathology, Diagnostic & Tissue Engineering Laboratory, Oral Pathology Department, Dental School, Tucumán University
| | - Jorge N Juárez
- Experimental Pathology, Diagnostic & Tissue Engineering Laboratory, Oral Pathology Department, Dental School, Tucumán University
| | - María V Jammal
- Experimental Pathology, Diagnostic & Tissue Engineering Laboratory, Oral Pathology Department, Dental School, Tucumán University
| | - Liliana R Missana
- Applied Molecular and Cellular Medicine Institute (IMMCA), Conicet-unt-siprosa
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Boyde A. Evaluation of laser ablation microtomy for correlative microscopy of hard tissues. J Microsc 2018; 271:17-30. [PMID: 29485196 DOI: 10.1111/jmi.12689] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 01/26/2018] [Accepted: 02/01/2018] [Indexed: 11/30/2022]
Abstract
Laser ablation machining or microtomy (LAM) is a relatively new approach to producing slide mounted sections of translucent materials. We evaluated the method with a variety of problems from the bone, joint and dental tissues fields where we require thin undecalcified and undistorted sections for correlative light microscopy (LM) and backscattered electron scanning electron microscopy (BSE SEM). All samples were embedded in poly-methylmethacrlate (PMMA) and flat block surfaces had been previously studied by BSE-SEM and confocal scanning light microscopy (CSLM). Most were also studied by X-yay microtomography (XMT). The block surface is stuck to a glass slide with cyanoacrylate adhesive. Setting the section thickness and levelling uses inbuilt optical coherence tomographic imaging. Tight focusing of near-infrared laser radiation in the sectioning plane gives extreme intensities causing photodisruption of material at the focal point. The laser beam is moved by a fast scanner to write a cutting line, which is simultaneously moved by an XY positioning unit to create a sectioning plane. The block is thereby released from the slide, leaving the section stuck to the slide. Light, wet polishing on the finest grade (4000 grit) silicon carbide polishing paper is used to remove a 1-2 μm thick damaged layer at the surface of the section. Sections produced by laser cutting are fine in quality and superior to those produced by mechanical cutting and can be thinner than the 'voxel' in most laboratory X-ray microtomography systems. The present extensive pilot studies have shown that it works to produce samples which we can study by both light and electron microscopy.
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Affiliation(s)
- A Boyde
- Dental Physical Sciences, Queen Mary University of London, London, UK
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Simmons T, Goodburn B, Singhrao SK. Decision tree analysis as a supplementary tool to enhance histomorphological differentiation when distinguishing human from non-human cranial bone in both burnt and unburnt states: A feasibility study. MEDICINE, SCIENCE, AND THE LAW 2016; 56:36-45. [PMID: 26130749 DOI: 10.1177/0025802415589776] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This feasibility study was undertaken to describe and record the histological characteristics of burnt and unburnt cranial bone fragments from human and non-human bones. Reference series of fully mineralized, transverse sections of cranial bone, from all variables and specimen states, were prepared by manual cutting and semi-automated grinding and polishing methods. A photomicrograph catalogue reflecting differences in burnt and unburnt bone from human and non-humans was recorded and qualitative analysis was performed using an established classification system based on primary bone characteristics. The histomorphology associated with human and non-human samples was, for the main part, preserved following burning at high temperature. Clearly, fibro-lamellar complex tissue subtypes, such as plexiform or laminar primary bone, were only present in non-human bones. A decision tree analysis based on histological features provided a definitive identification key for distinguishing human from non-human bone, with an accuracy of 100%. The decision tree for samples where burning was unknown was 96% accurate, and multi-step classification to taxon was possible with 100% accuracy. The results of this feasibility study strongly suggest that histology remains a viable alternative technique if fragments of cranial bone require forensic examination in both burnt and unburnt states. The decision tree analysis may provide an additional but vital tool to enhance data interpretation. Further studies are needed to assess variation in histomorphology taking into account other cranial bones, ontogeny, species and burning conditions.
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Affiliation(s)
- T Simmons
- Department of Forensic Science, Virginia Commonwealth University, Richmond, VA, USA
| | - B Goodburn
- School of Forensic and Investigative Sciences, University of Central Lancashire, Preston, UK
| | - S K Singhrao
- Oral & Dental Sciences Research Group, School of Medicine and Dentistry, University of Central Lancashire, Preston, UK
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Mathieu V, Vayron R, Richard G, Lambert G, Naili S, Meningaud JP, Haiat G. Biomechanical determinants of the stability of dental implants: influence of the bone-implant interface properties. J Biomech 2013; 47:3-13. [PMID: 24268798 DOI: 10.1016/j.jbiomech.2013.09.021] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 09/18/2013] [Accepted: 09/24/2013] [Indexed: 12/19/2022]
Abstract
Dental implants are now widely used for the replacement of missing teeth in fully or partially edentulous patients and for cranial reconstructions. However, risks of failure, which may have dramatic consequences, are still experienced and remain difficult to anticipate. The stability of biomaterials inserted in bone tissue depends on multiscale phenomena of biomechanical (bone-implant interlocking) and of biological (mechanotransduction) natures. The objective of this review is to provide an overview of the biomechanical behavior of the bone-dental implant interface as a function of its environment by considering in silico, ex vivo and in vivo studies including animal models as well as clinical studies. The biomechanical determinants of osseointegration phenomena are related to bone remodeling in the vicinity of the implants (adaptation of the bone structure to accommodate the presence of a biomaterial). Aspects related to the description of the interface and to its space-time multiscale nature will first be reviewed. Then, the various approaches used in the literature to measure implant stability and the bone-implant interface properties in vitro and in vivo will be described. Quantitative ultrasound methods are promising because they are cheap, non invasive and because of their lower spatial resolution around the implant compared to other biomechanical approaches.
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Affiliation(s)
- Vincent Mathieu
- Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, UMR CNRS 8208, 61 avenue du Général de Gaulle, 94010 Créteil cedex, France
| | - Romain Vayron
- Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, UMR CNRS 8208, 61 avenue du Général de Gaulle, 94010 Créteil cedex, France
| | - Gilles Richard
- Septodont, 58 Rue Pont de Créteil, 94100 Saint-Maur-des-Fossés, France
| | - Grégory Lambert
- Septodont, 58 Rue Pont de Créteil, 94100 Saint-Maur-des-Fossés, France
| | - Salah Naili
- Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, UMR CNRS 8208, 61 avenue du Général de Gaulle, 94010 Créteil cedex, France
| | - Jean-Paul Meningaud
- Service de Chirurgie Plastique, Reconstructrice et Esthétique, CHU H. Mondor, 94017 Créteil cedex, France
| | - Guillaume Haiat
- CNRS, Laboratoire Modélisation et Simulation Multi Echelle, UMR CNRS 8208, 61 avenue du Général de Gaulle, 94010 Créteil cedex, France.
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