ASSESSMENT OF LEPTIN CONCENTRATION IN GINGIVAL CREVICULAR FLUID (GCF) DURING ORTHODONTIC TOOTH MOVEMENT

The numbers of patients undergoing orthodontic treatment have increased spectacularly from past several decades. During orthodontic tooth movement the early response of periodontal tissues to mechanical stress is an acute inflammatory reaction. Mechanical stress from orthodontic appliances is believed to induce cells in the periodontal ligament (PDL) to form biologically active substances, such as enzymes and cytokines, responsible for connective tissue remodeling. Biochemical analysis of the gingival crevicular fluid (GCF) has provided a non-invasive model for investigating the cellular response of the underlying PDL during orthodontic tooth movement in vivo. In GCF, several substances such as interleukin, tumor necrosis factor, leptin, osteoprotegerin and alkaline phosphatase have been found to be significantly elevated in teeth under orthodontic forces compared with untreated control teeth. [14] Hence due to the above relevance the present study was planned for Assessment of Leptin Concentration in Gingival Crevicular Fluid (GCF) during Orthodontic Tooth Movement. The present study was planned in Department of Private Practioner, Swastik Dental Clinic and Orthodontic Centre Gaya. Total 10 cases of orthodontic of age 13 – 15 years were evaluated in the present study. For each subject, a maxillary cuspid undergoing distal orthodontic tooth movement was used as an experimental tooth, and the contralateral cuspids served as control tooth. Orthodontic brackets were placed on the canines. Experimental canines were moved in the distal direction through an archwire by use of an elastic chain exerting an initial force of 250 g. The amount of tooth movement for each tooth was measured with digimaticcalipers. At the distal aspect of experimental and control teeth, GCF was collected for subsequent analysis and the following examinations of the periodontium were conducted: Probing depth, presence or absence of plaque, and bleeding on probing. The collection and examinations were conducted immediately before activation and at 1 hr, 1 day, and 7days after the initiation of tooth movement. The data generated from the present study concludes that concentration of leptin in the GCF is decreased by orthodontic tooth movement. Leptin may be one of the mediators associated with orthodontic tooth movement. Orthodontic tooth movement can be carried out without any significant destructive changes in investing tissues of the teeth provided oral hygiene is properly maintained. Keywords: Leptin Gingival crevicular fluid, GCF, orthodontic, etc.

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Biomarkers of Periodontal Tissue Remodeling during Orthodontic Tooth Movement inMice and Men: Overview and Clinical Relevance

The Scientific World JOURNAL ◽

10.1155/2013/105873 ◽

2013 ◽

Vol 2013 ◽

pp. 1-8 ◽

Cited By ~ 31

Author(s):

Fabrizia d'Apuzzo ◽

Salvatore Cappabianca ◽

Domenico Ciavarella ◽

Angela Monsurrò ◽

Armando Silvestrini-Biavati ◽

...

Keyword(s):

Tooth Movement ◽

Gingival Crevicular Fluid ◽

Orthodontic Tooth Movement ◽

Biologically Active ◽

Orthodontic Appliances ◽

Mechanical Stimuli ◽

Simultaneous Treatment ◽

Periodontal Tissues ◽

Orthodontic Movement ◽

Crevicular Fluid

Biologically active substances are expressed by cells within the periodontium in response to mechanical stimuli from orthodontic appliances. Several possible biomarkers representing biological modifications during specific phenomena as simile-inflammatory process, bone resorption and formation, periodontal ligament changes, and vascular and neural responses are proposed. Citations to potentially published trials were conducted by searching PubMed, Cochrane databases, and scientific textbooks. Additionally, hand searching and contact with experts in the area were undertaken to identify potentially relevant published and unpublished studies. Selection criteria were as follows: animal models involving only mice and rats undergoing orthodontic treatment; collection of gingival crevicular fluid (GCF) as a noninvasively procedure for humans; no other simultaneous treatment that could affect experimental orthodontic movement. The data suggest that knowledge of the remodeling process occurring in periodontal tissues during orthodontic and orthopedic therapies may be a clinical usefulness procedure leading to proper choice of mechanical stress to improve and to shorten the period of treatment, avoiding adverse consequences. The relevance for clinicians of evaluating the rate of some substances as valid biomarkers of periodontal effects during orthodontic movement, by means of two models of study,mice and men, is underlined.

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Saliva Leptin Levels in Tooth Movement during Initial Stage of Orthodontic Alignment: A Pilot Study

Brazilian Journal of Oral Sciences ◽

10.20396/bjos.v16i0.8651060 ◽

2017 ◽

Vol 16 ◽

pp. 1-8

Author(s):

Noraini Abu Bakar ◽

Wisam Kamil ◽

Lina Al Bayati ◽

Basma Ezzat Mustafa

Keyword(s):

Pilot Study ◽

Mechanical Stress ◽

Orthodontic Treatment ◽

Tooth Movement ◽

Orthodontic Tooth Movement ◽

Biologically Active ◽

Orthodontic Appliances ◽

Initial Alignment ◽

Periodontal Tissues ◽

Before And After

Introduction: During orthodontic tooth movement, the early response of periodontal tissues to mechanical stress is an acute inflammatory reaction. Mechanical stress from orthodontic appliances is believed to induce cells in the periodontal ligament (PDL) to form biologically active substances, such as enzymes and cytokines, responsible for connective tissue remodeling (Nishijima Y et al 2006). Leptin, a polypeptide hormone has been classified as a cytokine (Zhang et al 1994). Earlier findings concluded that leptin at high local concentrations protects the host from inflammation and infection as well as maintaining bone levels. It has been also suggested that leptin plays a significant role in bone formation by its direct effect on osteoblasts (Alparslan et al 2010). This pilot study aimed to study leptin in saliva and its association with tooth movement during initial orthodontic alignment. Objectives: To determine if there are any differences in saliva leptin level before and after orthodontic alignment. Material and methods: Ten orthodontic patients (7 girls and 3 boys; mean age, 16.76 ± 1.1 years) with crowding (up to 5mm) that required orthodontic fixed appliances, on a non-extraction basis as part of the treatment plan, were recruited in this longitudinal study. Orthodontic study models were constructed at baseline and at 6- weeks after orthodontic treatment commenced. Full fixed orthodontic appliances with initial 0.014” Nickel Titanium archwire placed. The amount of crowding was measured, before and after initial alignment with an electronic digital caliper (Max-Cal, Japan Micrometer Ltd, Tokyo, Japan) with an accuracy of up to 0.01mm. Unstimulated morning saliva sample were collected at all visits, after at least an 8-hour period of fasting and no-toothbrushing. After centrifugation (4000x g;10min), the samples were stored at -25C and tested using Leptin Abnova LEP Human ELISA kit (KA3080) which was subsequently analyzed. Subjects’ periodontal health status was also monitored throughout the study. Ethical approval (ID IREC 262) was received on 7th April 2014 from International Islamic University Malaysia Research Ethics Committee (IREC). Results: Leptin concentration in saliva was significantly decreased in a time-dependant manner (t(9)=8.60, p<0.001), from before orthodontic treatment (7016.45± 425.15 pg/mL) and 6 weeks after bond-up (4901.92± 238.64 pg/mL). Conclusion: Leptin concentration in saliva is decreased during orthodontic tooth movement in initial alignment stage.

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Evaluation of IL1β and IL6 Gingival Crevicular Fluid Levels during the Early Phase of Orthodontic Tooth Movement in Adolescents and Young Adults

Applied Sciences ◽

10.3390/app11020521 ◽

2021 ◽

Vol 11 (2) ◽

pp. 521

Author(s):

Simina Chelărescu ◽

Petra Șurlin ◽

Mioara Decusară ◽

Mădălina Oprică ◽

Eugen Bud ◽

...

Keyword(s):

Young Adults ◽

Orthodontic Treatment ◽

Tooth Movement ◽

Gingival Crevicular Fluid ◽

Early Stage ◽

Statistical Tests ◽

Orthodontic Tooth Movement ◽

Adolescents And Young Adults ◽

Periodontal Tissues ◽

Crevicular Fluid

Background: The crevicular fluid analysis represents a useful diagnosis tool, with the help of which noninvasive cellular metabolic activity can be analyzed. The aim of the study is to investigate comparatively IL1β and IL6 in the gingival crevicular fluid of clinically healthy adolescents and young adults during the acute phase of orthodontic treatment. Methods: Gingival crevicular fluid was collected from 20 patients (aged between 11 and 28) undergoing orthodontic treatment. Measurements were taken before (T0) and after 24 h after distalization forces were activated (T1). IL1β and IL 6 were analyzed using Elisa tests. The statistical tests used were two-sided t tests. Results: Between the two time periods there was a significant raise both in the crevicular fluid rate (0.57 µL at T0 vs. 0.95 µL at T1, p = 0.001) and in IL1β levels (15.67 pg/µL at T0 vs. 27.94 pg/µL at T1, p = 0.009). We were able to identify IL6 only in a third of the sites. There is a significantly increased level of ILβ at T1 in adolescents, more than in young adults (42.96 pg/µL vs. 17.93 pg/µL, p = 0.006). Conclusions: In the early stage of orthodontic treatment, the periodontal tissues of adolescents are more responsive to orthodontic forces than those of young adults.

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CLINICAL SIGNIFICANCE OF THE LEVELS OF THE GINGIVAL CREVICULAR FLUID VOLUME AND LEPTIN DURING ORTHODONTIC TOOTH MOVEMENT

International Journal of Medical and Biomedical Studies ◽

10.32553/ijmbs.v3i11.759 ◽

2019 ◽

Vol 3 (11) ◽

Author(s):

Dr. Kumari Upasana ◽

Dr. Shivendra Choudhary

Keyword(s):

Immune System ◽

Periodontal Disease ◽

Tooth Movement ◽

Gingival Crevicular Fluid ◽

Orthodontic Tooth Movement ◽

Keywords Leptin ◽

Niti Wire ◽

Fixed Appliance ◽

Periodontal Tissues

It is assumed that leptin has a role in protecting gingival tissues, leptin stimulates the immune system and enhances bone formation by acting directly on osteoblasts. As periodontal disease progresses, the protective role of leptin on the gingiva is lost owing to a decrease in the leptin level. During orthodontic tooth movement, the early response of periodontal tissues to mechanical stress is an acute infammatory reaction. Study of leptin therefore is a useful guide to determine its relationship with tooth movement in both tension and pressure sites and the role of this cytokine in controlling the local infammation around the tooth. Detection of the leptin level in GCF at sites under orthodontic movement had been tested and it was found that the concentration of leptin in GCF is decreased by orthodontic tooth movement. The present study was planned in Department of Periodontology, Manipal College of Dental Sciences Manipal. Total 20 cases were evaluated in the present study. The 10 cases were enrolled in Group A as study cases and 10 cases were enrolled in control cases. The selected 10 patients were bonded with fixed appliance 0.022" PEA bracket slot, MBT prescription. The maxillary right canines (control tooth, CT) were not bonded with the bracket. The initial wire will be 0.016" NiTi wire. The distalisation force were applied on the left canine (test tooth, TT) using 0.010 SS lace backs. Significantly decreased levels of leptin concentration might result from the presence of inflammation adjacent to the teeth undergoing movement. It has been shown previously that orthodontic tooth movement may therefore show local traits of a damage/ repair process with inflammation-like reactions: high vascular activity, many leukocytes and macrophages, and involvement of the immune system. Keywords: Leptin levels, periodontal disease activity, orthodontic tooth movement, ininflammatory markers

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Peran matriks metaloproteinase-8 pada cairan krevikuler gingiva selama pergerakan gigi ortodontik

Journal of Dentomaxillofacial Science ◽

10.15562/jdmfs.v9i1.232 ◽

2010 ◽

Vol 9 (1) ◽

pp. 47

Author(s):

Susilowati Susilowati

Keyword(s):

Extracellular Matrix ◽

Cellular Response ◽

Alveolar Bone ◽

Tooth Movement ◽

Gingival Crevicular Fluid ◽

Early Stage ◽

Orthodontic Tooth Movement ◽

Mechanical Stimulus ◽

Periodontal Tissue ◽

Crevicular Fluid

Orthodontic treatment usually involves tooth movement. The orthodontic force as anextrinsic mechanical stimulus, evokes a biologic cellular response in the periodontalsupporting ligament. At early stage, it causes inflammation of periodontal tissuewhich is followed by the release of cytokines, T cell, B cell, and then MMP enzyme.MMP-8 (collagenase 2) is a member of matrixin subfamily plays an important role inperiodontal ligament remodeling. It has capability to maintain the cellular structure,integrity, activity, and function of extracellular matrix of periodontal tissue. The maincomponent of extracellular matrix is tissue protein, i.e. collagen, fibronectin, andglicosaminoglycan. During orthodontic tooth movement, collagen degradation occursin extracellular matrix of periodontal tissue and alveolar bone. As a result, it enablesthe release of cells from extracellular environment, for example osteoblast moves toapposition and osteoclast to resorption sites that enable the tooth movement. Theexpression and level of MMP-8 can be assessed in the gingival crevicular fluid. Theaim of this review is to describe the role of MMP-8 in orthodontic tooth movement.

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Orthodontic Therapeutic Biomarkers in Saliva and Gingival Crevicular Fluid

10.5772/intechopen.100733 ◽

2021 ◽

Author(s):

Sagar S. Bhat ◽

Ameet V. Revankar ◽

Shrinivas M. Basavaraddi

Keyword(s):

Tooth Movement ◽

Gingival Crevicular Fluid ◽

Orthodontic Tooth Movement ◽

Biologically Active ◽

Cochrane Library ◽

Biochemical Processes ◽

Orthodontic Therapy ◽

Biomechanical Changes ◽

Crevicular Fluid ◽

Bone Deposition

Several biologically active substances representing the bone deposition and resorption processes are released following damage to periodontal tissue during orthodontic movement. Biomarkers are by definition objective, quantifiable characteristics of biological processes. The analysis of saliva/salivary fluid and Gingival crevicular fluid (GCF) may be an accepted way to examine the ongoing biochemical processes associated with bone turnover during orthodontic tooth movement and fixed orthodontic treatment pain. Assessing the presence of these salivary physiological biomarkers would benefit the clinician in appropriate pain diagnosis and management objectively of various problems encountered during the orthodontic procedures and for better outcome of biomechanical therapy. Due to lack of standardized collection procedure, even though well accepted by patients, saliva is often neglected as a body fluid of diagnostic and prognostic value. A literature search was carried out in major databases such as PubMed, Medline, Cochrane library, Web of Science, Google Scholar, Scopus and EMBASE for relevant studies. Publication in English between 2000 to 2021 which estimated Saliva markers as indicators of orthodontic tooth movement was included. The list of biomarkers available to date was compiled and is presented in table format. Each biomarker is discussed separately based on the available and collected evidences. Several sensitive salivary and GCF biomarkers are available to detect the biomechanical changes occurring during orthodontic tooth movement and pain occurring during fixed orthodontic therapy. Further focussed research might help to analyze the sensitivity and reliability of these biomarkers or cytokines, which in turn can lead to the development of chairside tests to assess the pain experienced by patients during orthodontic therapy and finally the outcome of the fixed orthodontic therapy.

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Application of Vibrational Spectroscopies in the Qualitative Analysis of Gingival Crevicular Fluid and Periodontal Ligament during Orthodontic Tooth Movement

Journal of Clinical Medicine ◽

10.3390/jcm10071405 ◽

2021 ◽

Vol 10 (7) ◽

pp. 1405

Author(s):

Fabrizia d’Apuzzo ◽

Ludovica Nucci ◽

Ines Delfino ◽

Marianna Portaccio ◽

Giuseppe Minervini ◽

...

Keyword(s):

Periodontal Ligament ◽

Tooth Movement ◽

Gingival Crevicular Fluid ◽

Orthodontic Tooth Movement ◽

High Sensitivity ◽

Data Analysis Procedure ◽

Vibrational Spectroscopies ◽

Composition Structure ◽

The Individual ◽

Crevicular Fluid

Optical vibrational techniques show a high potentiality in many biomedical fields for their characteristics of high sensitivity in revealing detailed information on composition, structure, and molecular interaction with reduced analysis time. In the last years, we have used these techniques for investigating gingival crevicular fluid (GCF) and periodontal ligament (PDL) during orthodontic tooth treatment. The analysis with Raman and infrared signals of GCF and PDL samples highlighted that different days of orthodontic force application causes modifications in the molecular secondary structure at specific wavenumbers related to the Amide I, Amide III, CH deformation, and CH3/CH2. In the present review, we report the most relevant results and a brief description of the experimental techniques and data analysis procedure in order to evidence that the vibrational spectroscopies could be a potential useful tool for an immediate monitoring of the individual patient’s response to the orthodontic tooth movement, aiming to more personalized treatment reducing any side effects.

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