Morphology and spatial distribution of cortical bone canals: Evaluation of shape parameters, lacunarity, and fractal dimension in the human irradiated mandible
Karin Berria Tomazelli , Bianca Carla Bianco , Barbara Rech de Castro , Isabela Ramos , Vithória Rabelo Zimmer , Priscila Barbosa Ferreira Soares , Liliane Janete Grando , Gustavo Davi Rabelo
{"title":"Morphology and spatial distribution of cortical bone canals: Evaluation of shape parameters, lacunarity, and fractal dimension in the human irradiated mandible","authors":"Karin Berria Tomazelli , Bianca Carla Bianco , Barbara Rech de Castro , Isabela Ramos , Vithória Rabelo Zimmer , Priscila Barbosa Ferreira Soares , Liliane Janete Grando , Gustavo Davi Rabelo","doi":"10.1016/j.bone.2024.117349","DOIUrl":null,"url":null,"abstract":"<div><div>This study aimed to assess the spatial distribution of cortical bone canals' network through the analysis of lacunarity (Lac), fractal dimension (FD), and canal morphological parameters in the mandible (IR group, n = 7) of human patients under radiotherapy in comparison with non-irradiated younger (yC group, n = 8) and older (oC group, n = 8) individuals. Patients who underwent mandibular surgery were selected to have bone fragments removed during surgery, and undecalcified histological slides were analyzed by phase-contrast microscopy by two operators. The following morphological parameters were assessed in the Haversian canal (Ca): area (Ca·Ar, μm<sup>2</sup>), perimeter (Ca·Pm, μm), and circularity (Ca.c, #). Binary images were obtained by manually segmenting canals for Lac and FD analysis through box-counting. A total of 273 canals were segmented in the IR group, 284 in the yC group, and 60 in the oC group. Higher values for canal area and perimeter (p < 0.0001) were found for oC (7871 μm<sup>2</sup> and 358.9 μm, respectively), followed by IR (2958 μm<sup>2</sup> and 212.9 μm, respectively), and yC (1286 μm<sup>2</sup> and 135.8 μm, respectively). Canal circularity was lower for oC (p < 0.0001). Lac and FD did not differ when comparing irradiated individuals with the younger and older individuals. In conclusion, cortical canals are morphologically different when comparing younger and older individuals with patients exposed to ionizing radiation. Alterations on Haversian canals after radiotherapy could have clinical implications, mostly related to vascularization. Lac and FD were reliable parameters in assessing the spatial organization of the canals within the matrix.</div></div>","PeriodicalId":9301,"journal":{"name":"Bone","volume":"192 ","pages":"Article 117349"},"PeriodicalIF":3.5000,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bone","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S8756328224003387","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENDOCRINOLOGY & METABOLISM","Score":null,"Total":0}
引用次数: 0
Abstract
This study aimed to assess the spatial distribution of cortical bone canals' network through the analysis of lacunarity (Lac), fractal dimension (FD), and canal morphological parameters in the mandible (IR group, n = 7) of human patients under radiotherapy in comparison with non-irradiated younger (yC group, n = 8) and older (oC group, n = 8) individuals. Patients who underwent mandibular surgery were selected to have bone fragments removed during surgery, and undecalcified histological slides were analyzed by phase-contrast microscopy by two operators. The following morphological parameters were assessed in the Haversian canal (Ca): area (Ca·Ar, μm2), perimeter (Ca·Pm, μm), and circularity (Ca.c, #). Binary images were obtained by manually segmenting canals for Lac and FD analysis through box-counting. A total of 273 canals were segmented in the IR group, 284 in the yC group, and 60 in the oC group. Higher values for canal area and perimeter (p < 0.0001) were found for oC (7871 μm2 and 358.9 μm, respectively), followed by IR (2958 μm2 and 212.9 μm, respectively), and yC (1286 μm2 and 135.8 μm, respectively). Canal circularity was lower for oC (p < 0.0001). Lac and FD did not differ when comparing irradiated individuals with the younger and older individuals. In conclusion, cortical canals are morphologically different when comparing younger and older individuals with patients exposed to ionizing radiation. Alterations on Haversian canals after radiotherapy could have clinical implications, mostly related to vascularization. Lac and FD were reliable parameters in assessing the spatial organization of the canals within the matrix.
期刊介绍:
BONE is an interdisciplinary forum for the rapid publication of original articles and reviews on basic, translational, and clinical aspects of bone and mineral metabolism. The Journal also encourages submissions related to interactions of bone with other organ systems, including cartilage, endocrine, muscle, fat, neural, vascular, gastrointestinal, hematopoietic, and immune systems. Particular attention is placed on the application of experimental studies to clinical practice.