Periodontal ligament cellular response to orthodontic forces
Journal name: Journal of Indian Society of Periodontology
Original article title: Cellular response within the periodontal ligament on application of orthodontic forces
The Journal of Indian Society of Periodontology (JISP) publishes original scientific articles on periodontology (the study of supporting structures of teeth) and oral implantology. It is a bimonthly open-access journal with special issues for specific occasions.
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Original source:
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Nazeer Ahmed Meeran
Journal of Indian Society of Periodontology:
(A bimonthly open-access journal)
Full text available for: Cellular response within the periodontal ligament on application of orthodontic forces
Year: 2013 | Doi: 10.4103/0972-124X.107468
Copyright (license): CC BY-NC-SA
Summary of article contents:
Introduction
Orthodontic force application leads to tooth movement through remodeling of the periodontal ligament (PDL) and alveolar bone. This process is initiated by strain within the biological system, which triggers a cascade of responses, including the release of neurotransmitters and other signaling molecules. The biological reaction to mechanical loading can be divided into three distinct phases: the initial phase characterized by rapid tooth movement, the lag phase with little to no displacement due to PDL hyalinization, and the post-lag phase, where movement rates increase again as necrotic tissues are removed. The continued research in this field aims to elucidate the complex biological mechanisms underlying orthodontic tooth movement.
Role of Inflammatory Mediators
One key aspect of this biological response is the involvement of inflammatory mediators, particularly prostaglandins and cytokines. Prostaglandins, derived from arachidonic acid, are produced quickly upon tissue injury and play a significant role in orthodontic tooth movement by promoting osteoclastic activity and bone resorption. Cytokines such as IL-1, IL-6, and TNF-α are mobilized in response to mechanical strain, altering gene expression in PDL cells and facilitating alveolar bone remodeling. This interplay between mechanical forces, inflammatory mediators, and cellular responses not only helps in the understanding of the mechanisms but also indicates potential biomarker applications for monitoring the progress of orthodontic treatment.
Conclusion
The biological processes involved in orthodontic tooth movement are complex and deeply intertwined with inflammatory responses in periodontal tissues. Mechanical stimuli induce a rich array of biological responses that ultimately result in bone remodeling, essential for effective tooth movement. Various biomolecules such as neurotransmitters, growth factors, and cytokines are crucial in mediating these processes, presenting opportunities for their use as biomarkers to monitor orthodontic tooth movement. Understanding these mechanisms is essential for optimizing orthodontic treatments, ensuring that they effectively restore and maintain dental health and function.
FAQ section (important questions/answers):
What happens to the periodontal ligament during orthodontic force application?
The application of orthodontic force causes remodeling of the periodontal ligament, including cellular changes and reorganization of the extracellular matrix, resulting in tooth displacement and adaptation of the biological system.
What are the main biological responses to orthodontic tooth movement?
Orthodontic tooth movement triggers inflammatory responses, cytokine production, and bone remodeling. Various factors, including prostaglandins, cytokines, and matrix metalloproteinases are involved, promoting osteoclastic and osteoblastic activities, crucial for effective tooth movement.
How do cytokines play a role in orthodontic treatment?
Cytokines such as IL-1, IL-6, and TNF-α regulate bone remodeling. They facilitate osteoclastic activity during tooth movement by altering gene expression in response to mechanical strain applied to the periodontal ligament.
What markers can indicate bone resorption during orthodontic treatment?
Biomarkers like prostaglandin E2, matrix metalloproteinases, osteocalcin, and leucine-rich alpha 2-glycoprotein can indicate bone resorption. These markers are useful to monitor orthodontic tooth movement as they reflect ongoing bone remodeling processes.
What is the significance of mechanical loading in orthodontics?
Mechanical loading initiates strain in the periodontal ligament, leading to a cascade of biological responses, including inflammation and bone remodeling. This response is essential for effective orthodontic tooth movement and adaptation of the dental structure.
Glossary definitions and references:
Scientific and Ayurvedic Glossary list for “Periodontal ligament cellular response to orthodontic forces”. This list explains important keywords that occur in this article and links it to the glossary for a better understanding of that concept in the context of Ayurveda and other topics.
1) Activity:
Activity refers to the processes of biological systems in response to stimuli, such as mechanical force applied during orthodontic treatment. In this context, it encompasses the actions of cells like osteoclasts and osteoblasts, which regulate bone remodeling through resorption and formation, ultimately facilitating tooth movement.
2) Disease:
Disease in the context of orthodontics often refers to periodontal disease, which impacts the health of the periodontal ligament and alveolar bone. It influences the biological responses during orthodontic treatment and is closely associated with changes in inflammatory cytokines and markers that affect bone remodeling processes.
3) Inflammation:
Inflammation is a critical biological response to tissue injury or mechanical stress, such as orthodontic force application. It involves the release of cytokines and growth factors, leading to osteoclastic and osteoblastic activities. This process is crucial for remodeling the periodontal tissues to accommodate tooth movement.
4) Surface:
Surface refers to the areas of cells in contact with external forces, such as the periodontal ligament during orthodontic treatment. The surface interactions between bone cells and orthodontic appliances trigger signaling pathways that initiate cellular responses, influencing the remodeling of bone and periodontal structures.
5) Kappa:
Kappa, often referred to in association with nuclear factor kappa B (NF-kB), denotes a signaling protein involved in regulating bone remodeling. Its activation promotes osteoclastogenesis and inflammation in the periodontal tissues, playing a significant role in responses to orthodontic forces and related cellular activities.
6) Beta:
Beta typically refers to transforming growth factor-beta (TGF-β), a cytokine that plays a vital role in bone remodeling and healing. In orthodontics, TGF-β regulates the biological responses of osteoblasts and osteoclasts, influencing the processes necessary for effective tooth movement and periodontal health.
7) Post:
Post refers to the phase after the application of orthodontic forces where enhanced tooth movement occurs. This phase follows the initial rapid movement and lag phase, indicating a period of significant biological activity and remodeling of periodontal tissues to facilitate proper occlusal function.
8) Accumulation (Accumulating, Accumulate):
Accumulation pertains to the gathering of various cytokines, growth factors, and other markers in response to orthodontic force application. This buildup is vital for signaling pathways that mediate inflammation and coordinate the activities of osteoclasts and osteoblasts during the bone remodeling process.
9) Transformation (Transform, Transforming):
Transforming often relates to transforming growth factor, which is instrumental in the differentiation of osteoprogenitor cells into osteoblasts during bone formation. In orthodontics, its role is crucial in regulating the biological processes that facilitate tooth movement and periodontal adaptation to mechanical stress.
10) Developing:
Developing refers to the processes involved in bone formation and remodeling. In the context of orthodontics, it signifies the ongoing biological changes in response to mechanical forces which promote the maturation of osteoblasts and the overall development of the alveolar bone structure.
11) Science (Scientific):
Scientific denotes the research-based approach to understanding biological responses during orthodontic treatments. It involves the study of cellular and molecular mechanisms responsible for tooth movement, facilitating evidence-based practices and advancements in the field of orthodontics and related disciplines.
12) Channel:
Channel refers to the molecular pathways or openings that allow the exchange of signaling molecules such as prostaglandins and cytokines. These channels play a crucial role in the mechanotransduction processes that occur in periodontal tissues in response to orthodontic forces, initiating bone remodeling.
13) Field:
Field describes the broader area of scientific inquiry concerning orthodontics and dental biology. This field encompasses the study of tooth movement, cellular interactions in periodontal tissues, and the biological responses to mechanical forces, highlighting ongoing research and advancements within the discipline.
14) Blood:
Blood is essential in delivering necessary nutrients and signaling molecules to periodontal tissues. Changes in blood flow occur during orthodontic treatment, with capillary dilation and an influx of inflammatory cells, affecting the biological responses that contribute to bone remodeling and tooth movement.
15) Viru:
Viru might refer to the study of viral interactions or pathogenic influences in dental tissues. While not directly addressed in this context, understanding viral roles can be relevant in the broader discussions of periodontal disease and its implications in orthodontic treatment outcomes.
16) Male:
Male denotes the demographic aspect of orthodontic studies and responses to treatment. Understanding variations in bone remodeling and biological processes based on gender can enhance personalized orthodontic approaches, accounting for specific physiological differences that may influence treatment outcomes.
Other Science Concepts:
Discover the significance of concepts within the article: ‘Periodontal ligament cellular response to orthodontic forces’. Further sources in the context of Science might help you critically compare this page with similair documents:
Inflammatory mediators, Chronic periodontitis, Osteoblasts, Interleukin-1 beta, Myeloperoxidase, Biological processes, Aspartate Aminotransferase, Biological marker, Alveolar bone, Gingival crevicular fluid, Alkaline phosphatase activity, Cathepsin B, Growth factor, Cytokines and chemokines, Matrix metalloproteinase, Periodontal Ligament, Osteoclasts, Prostaglandin, Mechanical loading.