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  • Tooth root resorption: A review.
    Science Progress 2022
    Tooth root resorption is multifactorial, leading to progressive destruction and eventual loss of tooth root dentin and cement. There are internal and external types of... (Review)
    Summary PubMed Full Text PDF

    Review

    Authors: Artak Heboyan, Anna Avetisyan, Mohmed Isaqali Karobari...

    Tooth root resorption is multifactorial, leading to progressive destruction and eventual loss of tooth root dentin and cement. There are internal and external types of root resorption, each having its variety. The etiology and pathogenesis of tooth root resorption are poorly understood, and the most significant etiological factors are trauma, pulpal infection, tooth bleaching, and orthodontic treatment. Tooth root resorption is primarily asymptomatic; thus, it is revealed accidentally by radiographic examination. Progressive clinical manifestations are pain, tooth discoloration, tooth mobility, and other conditions. Awareness of the causes and risk factors allowing tooth root resorption, and regular radiographic examination, in case of necessity, make it possible to reveal resorption at an early stage and to prevent its further development. Thus, the aim of this study is to present etiopathogenesis, a clinical course, and diagnostic peculiarities of internal and external types of tooth root resorption, enabling practicing dentists to timely diagnose root resorption and take appropriate measures to avoid further complications. Within the limitation of this review, even though the etiopathogenesis of tooth root resorption is yet not fully understood, it is suggested that the etiological factors fall into two groups (endogenic and exogenic) to enhance further understanding of the possible causes and mechanisms of root resorption and allow practitioners to monitor high-risk patients and make timely diagnoses. Moreover, radiographic examination and CBCT are indispensable for the diagnosis of root resorption.

    Topics: Humans; Root Resorption; Tooth Discoloration; Tooth Root

    PubMed: 35759366
    DOI: 10.1177/00368504221109217

  • Present status and future directions: Root resorption.
    International Endodontic Journal Oct 2022
    Root resorption is the loss of dental hard tissue because of odontoclastic action. In permanent teeth, it is undesirable and pathological in nature. Root resorption may... (Review)
    Summary PubMed Full Text PDF

    Review

    Authors: Shanon Patel, Navid Saberi, Tiago Pimental...

    Root resorption is the loss of dental hard tissue because of odontoclastic action. In permanent teeth, it is undesirable and pathological in nature. Root resorption may occur on the inner aspect of the root canal (internal root resorption) or on the outer aspect of the root (external root resorption). Regardless of its location, root resorption is irreversible, and may result in discomfort for the patient, requires management and/or, in some cases, results in the premature loss of the affected tooth. Root resorption is often challenging to accurately diagnose and manage. The aim of this narrative review is to present the relevant literature on the aetiology, pathogenesis, diagnosis and management, as well as discuss the future directions of diagnosis and management of root resorption.

    Topics: Humans; Root Resorption; Root Canal Therapy; Dentition, Permanent

    PubMed: 35229320
    DOI: 10.1111/iej.13715

  • Tooth Resorption - Part 1: The evolvement, rationales and controversies of tooth resorption.
    Dental Traumatology : Official... Aug 2022
    In 1966, Andreasen and Hjørting-Hansen were the first to describe a relationship between tooth resorption and dental trauma. However, Andreasen's original... (Review)
    Summary PubMed Full Text PDF

    Review

    Authors: Shaul Lin, Daniel Moreinos, Arieh Y Kaufman...

    In 1966, Andreasen and Hjørting-Hansen were the first to describe a relationship between tooth resorption and dental trauma. However, Andreasen's original classification did not include other resorptive processes which have since been identified. Numerous articles have been published suggesting new terminology and definitions for tooth resorption. A uniform language with universally accepted terminology is crucial to eliminate the multiplicity of terms and definitions which only cause confusion within the profession. An electronic literature search was carried out in the PubMed database using the following keywords for articles published in English: "root resorption," "inflammatory root resorption," "replacement resorption," "cervical resorption," "trauma," "ankylosis," "surface resorption," and "internal resorption." The search also included textbooks and glossaries that may not have surfaced in the online search. This was done to identify articles related to tooth resorption and its etiology in dentistry. The aim of this review was to present the history that has led to the variety of terms and definitions for resorption. This review emphasizes the need for a clearer, simpler, and more comprehensive nomenclature for the various types of tooth resorption which are presented in Part 2 of this series.

    Topics: Humans; Root Resorption; Tooth Ankylosis; Tooth Resorption

    PubMed: 35559593
    DOI: 10.1111/edt.12757

  • Tooth resorption-Part 2: A clinical classification.
    Dental Traumatology : Official... Aug 2022
    Tooth resorption is either a physiological or a pathological process resulting in loss of dentin and/or cementum. It may also be associated with bone loss. Currently... (Review)
    Summary PubMed Full Text PDF

    Review

    Authors: Paul V Abbott, Shaul Lin

    Tooth resorption is either a physiological or a pathological process resulting in loss of dentin and/or cementum. It may also be associated with bone loss. Currently there is no universal classification for the different types of tooth resorption. This lack of a universal classification leads to both confusion amongst practitioners and poor understanding of the resorptive processes occurring in teeth which can result in incorrect/inappropriate diagnoses and mis-management. When developing a classification of diseases and/or conditions that occur within the body, several criteria should be followed to ensure a useful classification. The classification should not only include pathological conditions but also physiological conditions. Since tooth resorption can be either pathological or physiological, a classification of tooth resorption should include both of these categories. Any classification of diseases should be possible to use clinically, meaningful, useful, clear and universal. It should enable easy storage, retrieval and analysis of health information for evidenced-based decision-making. It should also be possible to share and compare data and information between different institutions, settings and countries. A classification of tooth resorption should be developed by combining anatomical, physiological and pathological approaches. For some types of resorption, the aetiological approach should also be incorporated. A classification of tooth resorption that uses simple, relevant and appropriate terminology based on the nature and location of the resorptive process occurring in teeth is proposed. There are two broad categories of internal and external tooth resorption which are sub-divided into three types of internal tooth resorption (surface, inflammatory, replacement) and eight types of external tooth resorption (surface, inflammatory, replacement, invasive, pressure, orthodontic, physiological, idiopathic). The clinician's understanding, diagnosis and management of tooth resorption can be facilitated by using this simple classification which should ideally be used universally by the entire dental profession to ensure clarity and to avoid confusion.

    Topics: Dental Cementum; Humans; Molar; Root Resorption; Tooth Resorption

    PubMed: 35605161
    DOI: 10.1111/edt.12762

  • Is Inflammation a Friend or Foe for Orthodontic Treatment?: Inflammation in Orthodontically Induced Inflammatory Root Resorption and Accelerating Tooth Movement.
    International Journal of Molecular... Feb 2021
    The aim of this paper is to provide a review on the role of inflammation in orthodontically induced inflammatory root resorption (OIIRR) and accelerating orthodontic... (Review)
    Summary PubMed Full Text PDF

    Review

    Authors: Masaru Yamaguchi, Shinichi Fukasawa

    The aim of this paper is to provide a review on the role of inflammation in orthodontically induced inflammatory root resorption (OIIRR) and accelerating orthodontic tooth movement (AOTM) in orthodontic treatment. Orthodontic tooth movement (OTM) is stimulated by remodeling of the periodontal ligament (PDL) and alveolar bone. These remodeling activities and tooth displacement are involved in the occurrence of an inflammatory process in the periodontium, in response to orthodontic forces. Inflammatory mediators such as prostaglandins (PGs), interleukins (Ils; IL-1, -6, -17), the tumor necrosis factor (TNF)-α superfamily, and receptor activator of nuclear factor (RANK)/RANK ligand (RANKL)/osteoprotegerin (OPG) are increased in the PDL during OTM. OIIRR is one of the accidental symptoms, and inflammatory mediators have been detected in resorbed roots, PDL, and alveolar bone exposed to heavy orthodontic force. Therefore, these inflammatory mediators are involved with the occurrence of OIIRR during orthodontic tooth movement. On the contrary, regional accelerating phenomenon (RAP) occurs after fractures and surgery such as osteotomies or bone grafting, and bone healing is accelerated by increasing osteoclasts and osteoblasts. Recently, tooth movement after surgical procedures such as corticotomy, corticision, piezocision, and micro-osteoperforation might be accelerated by RAP, which increases the bone metabolism. Therefore, inflammation may be involved in accelerated OTM (AOTM). The knowledge of inflammation during orthodontic treatment could be used in preventing OIIRR and AOTM.

    Topics: Animals; Humans; Inflammation; Osteogenesis; Root Resorption; Tooth Movement Techniques

    PubMed: 33673606
    DOI: 10.3390/ijms22052388

  • Endodontic-orthodontic interactions: a review and treatment recommendations.
    Australian Dental Journal Jun 2023
    The literature is replete with articles describing the many and varied interactions between endodontic treatment and orthodontic tooth movement (OTM), often reporting... (Review)
    Summary PubMed Full Text

    Review

    Authors: P Parashos

    The literature is replete with articles describing the many and varied interactions between endodontic treatment and orthodontic tooth movement (OTM), often reporting conflicting views and findings, which creates confusion for clinicians. Original research and review articles have described aspects such as apical root resorption and potential pulpal complications of teeth related to OTM. Some interactions are of relatively minor clinical significance, whilst others may have adverse consequences. A history of dental trauma before or during OTM further complicates the interactions. This review re-assesses the historical literature on endodontic-orthodontic interactions in light of more recent research and presents guidelines for managing clinical situations involving both disciplines. © 2023 Australian Dental Association.

    Topics: Humans; Root Resorption; Australia; Dental Pulp; Tooth Movement Techniques; Root Canal Therapy

    PubMed: 37961018
    DOI: 10.1111/adj.12996

  • Cellular and Molecular Pathways Leading to External Root Resorption.
    Journal of Dental Research Feb 2017
    External apical root resorption during orthodontic treatment implicates specific molecular pathways that orchestrate nonphysiologic cellular activation. To date, a... (Review)
    Summary PubMed Full Text PDF

    Review

    Authors: A Iglesias-Linares, J K Hartsfield

    External apical root resorption during orthodontic treatment implicates specific molecular pathways that orchestrate nonphysiologic cellular activation. To date, a substantial number of in vitro and in vivo molecular, genomic, and proteomic studies have supplied data that provide new insights into root resorption. Recent mechanisms and developments reviewed here include the role of the cellular component-specifically, the balance of CD68, iNOS M1- and CD68, CD163 M2-like macrophages associated with root resorption and root surface repair processes linked to the expression of the M1-associated proinflammatory cytokine tumor necrosis factor, inducible nitric oxide synthase, the M1 activator interferon γ, the M2 activator interleukin 4, and M2-associated anti-inflammatory interleukin 10 and arginase I. Insights into the role of mesenchymal dental pulp cells in attenuating dentin resorption in homeostasis are also reviewed. Data on recently deciphered molecular pathways are reviewed at the level of (1) clastic cell adhesion in the external apical root resorption process and the specific role of α/β integrins, osteopontin, and related extracellular matrix proteins; (2) clastic cell fusion and activation by the RANKL/RANK/OPG and ATP-P2RX7-IL1 pathways; and (3) regulatory mechanisms of root resorption repair by cementum at the proteomic and transcriptomic levels.

    Topics: Animals; Cytokines; Dental Cementum; Humans; Orthodontics, Corrective; Root Resorption; Signal Transduction

    PubMed: 27811065
    DOI: 10.1177/0022034516677539

  • Biomechanical and biological responses of periodontium in orthodontic tooth movement: up-date in a new decade.
    International Journal of Oral Science Jun 2021
    Nowadays, orthodontic treatment has become increasingly popular. However, the biological mechanisms of orthodontic tooth movement (OTM) have not been fully elucidated.... (Review)
    Summary PubMed Full Text PDF

    Review

    Authors: Yuan Li, Qi Zhan, Minyue Bao...

    Nowadays, orthodontic treatment has become increasingly popular. However, the biological mechanisms of orthodontic tooth movement (OTM) have not been fully elucidated. We were aiming to summarize the evidences regarding the mechanisms of OTM. Firstly, we introduced the research models as a basis for further discussion of mechanisms. Secondly, we proposed a new hypothesis regarding the primary roles of periodontal ligament cells (PDLCs) and osteocytes involved in OTM mechanisms and summarized the biomechanical and biological responses of the periodontium in OTM through four steps, basically in OTM temporal sequences, as follows: (1) Extracellular mechanobiology of periodontium: biological, mechanical, and material changes of acellular components in periodontium under orthodontic forces were introduced. (2) Cell strain: the sensing, transduction, and regulation of mechanical stimuli in PDLCs and osteocytes. (3) Cell activation and differentiation: the activation and differentiation mechanisms of osteoblast and osteoclast, the force-induced sterile inflammation, and the communication networks consisting of sensors and effectors. (4) Tissue remodeling: the remodeling of bone and periodontal ligament (PDL) in the compression side and tension side responding to mechanical stimuli and root resorption. Lastly, we talked about the clinical implications of the updated OTM mechanisms, regarding optimal orthodontic force (OOF), acceleration of OTM, and prevention of root resorption.

    Topics: Humans; Osteoblasts; Osteoclasts; Periodontal Ligament; Periodontium; Root Resorption; Tooth Movement Techniques

    PubMed: 34183652
    DOI: 10.1038/s41368-021-00125-5

  • Management of transverse root fractures in dental trauma.
    Dental and Medical Problems 2022
    The management of complex dental trauma can be modulated according to the emergencies that may arise over time. Clinical management of transverse root fractures may... (Review)
    Summary PubMed Full Text

    Review

    Authors: Beatrice Marasca, Artnora Ndokaj, Irena Duś-Ilnicka...

    The management of complex dental trauma can be modulated according to the emergencies that may arise over time. Clinical management of transverse root fractures may require different therapies based on situations, such as delay and error in the treatment of an avulsion trauma associated with apical third root fracture, patient's poor compliance, or external and internal root resorption. The primary aim of this article was to review studies regarding root fractures in the permanent dentition and root fracture management. The secondary aim was to present the inflammatory reaction and the complications (i.e., infections) that may occur if the International Association for Dental Traumatology (IADT) guidelines are not followed. In addition, a scenario is devised in which endodontic surgery, despite the baseline patient's conditions and negative prognosis, can help to inhibit the inflammatory root resorption and allow the preservation of soft and hard tissues within a long follow-up from the injury, for the purpose of demonstrating the next possible implant-prosthetic rehabilitation.

    Topics: Humans; Tooth Fractures; Root Resorption; Tooth Avulsion; Fractures, Bone; Dentition, Permanent

    PubMed: 36537854
    DOI: 10.17219/dmp/145895

  • Root resorption factors associated with orthodontic treatment with fixed appliances: A systematic review and meta-analysis.
    Dental and Medical Problems 2022
    External apical root resorption (EARR) is a serious complication that should be avoided during orthodontic treatment; this pathology depends on multiple factors. Data... (Meta-Analysis)
    Summary PubMed Full Text

    Meta-Analysis Review

    Authors: Humberto Villaman-Santacruz, Rafael Torres-Rosas, Alfonso Enrique Acevedo-Mascarúa...

    External apical root resorption (EARR) is a serious complication that should be avoided during orthodontic treatment; this pathology depends on multiple factors. Data from clinical studies should be assessed to determine the influence these factors have on the development of EARR. This systematic review aims to compare EARR produced by different factors (orthodontic systems, dental trauma, and dental vitality). The protocol was registered on the PROSPERO database. The search was performed on 5 databases. Accepted study designs included randomized controlled trials, nonrandomized clinical trials, and observational studies. Full-text articles from clinical studies of EARR associated with orthodontic treatment in English, Spanish, or Portuguese with no publication date restrictions were selected. Data from the studies, such as age, population, study groups, and outcome measures, were recorded. Multiple meta-analyses were performed with data from the included studies. Evidence suggests that EARR induced by orthodontic treatment is similar, regardless of the technique used. Evidence of the effect of previous dental trauma on EARR during orthodontic treatment is limited. There is less EARR associated with orthodontic treatment in endodontically treated teeth than in vital teeth. These conclusions should be considered with caution due to the low certainty of the evidence.

    Topics: Humans; Orthodontic Appliances, Fixed; Root Resorption; Tooth, Nonvital; Clinical Trials as Topic

    PubMed: 36206494
    DOI: 10.17219/dmp/145369

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