At the bottom of the sulcus, there is a specific epithelial structure, junctional epithelium, which, on one hand, plays an active role in the defence. The junctional epithelium je adjacent to the tooth is that part of the gingiva which attaches the connective tissue to the tooth surface fig. The junctional epithelium, in continuation with the oral. Neutrophil migration into the gingival sulcus is associated. Renewal of gingival epithelium cell division cell shedding the dentogingival junction. Morphological and functional characteristics of human gingival. Position of gingival margin and junctional epithelium a thorough examination of the gingiva includes evaluation of color, size, shape form or contour, consistency, surface texture, position of the gingival margin and junctional epithelium, mucogingival junctions, bleeding and exudate.
Role of gingival lymphatics in tissue fluid balance and. The sulcular epithelium lines the sulcus, which is the space between the gingiva and the enamel surface of the tooth. Gingival and dentogingival junctional tissue flashcards. The gingival margin is the transition epithelium between the keratinised oral and the nonkeratinised sulcular epithelium fig. The gingival sulcus is located between the tooth and the free gingival margin and is the crevice that surrounds the tooth. In vitro reconstruction of human junctional and sulcular.
Position of gingival margin and junctional epithelium. Both the sulcular epithelium and junctional epithelium are difficult to see in clinical examination of healthy gingival tissue. The sulcus is literally the area of separation between the surrounding epithelium and the surface of the encompassed tooth. The gingival sulcus is the natural space found between the tooth and the gum tissue that surrounds the tooth, known as the free gingiva. Pmns play a role in innate immunity while monocytesmacrophages and.
Aug 03, 2015 conclusion junctional epithelium is important because of its anatomical location. The gingival junctional epithelium is located at a strategically important interface at the bottom of the gingival sulcus and actively contributes to inflammatory processes. Gingival and dentogingival junctional tissue pocket. Visualization of junctional epithelial cell replacement by oral gingival. Several families of antimicrobial peptides have been identified in oral cavity which includes alphadefensins, betadefensins, calprotectin, adrenomedullin, histatins, and cathelicidin. During development, reduced enamel epithelium fuses with oral epithelium and forms along crown to level of cej. Black in which he observed that the gingival tissue is attached to the cementoenamel junction. The sulcular epithelium is extremely important, because it may act as a semipermeable membrane through. It plays a crucial role as a mechanical barrier against bacterial invasion and in the innate immune response to infectious inflammation in periodontal tissue 3, 4, 5. Bmc oral health morphological and functional characteristics of human gingival junctional epithelium qian jiang 0 youcheng yu 0 hong ruan 0 yin luo 0 xuehua guo 0 0 department of stomatology, zhongshan hospital fudan university, 180 fenglin road, shanghai 200032, china background.
Besides, neutrophil adefensins was found to localize in the junctional epithelium, which has significant effects on the epithelial integrity and. Dec 15, 2017 the gingival junctional epithelium is located at a strategically important interface at the bottom of the gingival sulcus and actively contributes to inflammatory processes. This study aims to observe the morphological characteristics and identify the function characteristics of. It forms a band 23 mm wide around the tooth, and is approximately 1530 cells thick coronally and tapers to a single cell apically. Apr, 2019 the junctional epithelium je is that epithelium which lies at, and in health also defines, the base of the gingival sulcus. Hence, the aim of the present study was to characterize the cell adhesion structure in the junctional epithelium compared with the other two epithelia. It is the site of hostbacterial interaction in initiation of periodontal disease. Gingival cervicular fluid gcf what contains both the immunological components and cells of the blood.
As the junctional epithelium becomes inflamed and oedematous it separates from the root surface. Immediately apical to the base of the pocket, and coronal to the most coronal of the gingival fibers is the junctional epithelium. Material and methods this in vitro study was carried out on 36 sites on the lingual surface of eight mandibles from healthy young. The junctional epithelium je is an epithelial component that is directly attached to the tooth surface and has a protective function against periodontal diseases. Junctional epithelium wikipedia republished wiki 2. The junctional epithelium represents the main site of the initial interaction between the host and the dysbiotic biofilm. Computerassisted identification of the gingival sulcus. The probing depth of the gingival sulcus is measured by a calibrated periodontal probe. Biological characteristics of the junctional epithelium. Erupted teeth are surrounded by the gingival epithelium, which is. The junctional epithelium is a nonkeratinizing stratified epithelium in contact with the sulcus epithelium and thegingival connective tissue fig. The gingival sulcus is bounded by the enamel of the crown of the tooth and the sulcular epithelium. Gingival and dentogingival junctional tissue 72 terms.
Junctional epithelium located at an interface of gingival sulcus and periodontal connective tissue, provides a dynamic seal around the teeth, protecting the. In addition, gingival crevicular fluid gcf is exuded by the periodontal tissue into the gingival sulci and pockets, where it mixes with saliva. Several families of antimicrobial peptides have been identified in oral cavity which includes alphadefensins, betadefensins, calprotectin. Since gingival epithelial cells are in close proximity with microbes and their virulence factors, the response of epithelium to these insults determines the health of the gingival sulcus. The conversion of the junctional epithelium to pocket epithelium is regarded as hallmark in the development of periodontitis. Its unique structural and functional adaptation enables the junctional epithelium to control the constant microbiological challenge. Little, however, is known about the molecular mechanisms involved in this key process aimed at the control of subgingival bacterial plaque. Continuing from the sulcular epithelium is the very thin nonkeratinised junctional epithelium. It allows the components of the blood to reach the tooth surface through the junctional epithelium from the blood vessels of the adjacent lamina propria.
The gcf contains both the immunological components and cells of the blood. The combination of these two measurements constitutes 2mm of space for biologic width gargiulo, krajewski et al. Junctional epithelium wikimili, the free encyclopedia. External basal lamina between the junctional epithelium and the lamina propria at the apical extent of the je. The first is a 50m inner zone that is rich in fibers. Here, we investigated the role of autophagy in junctional epithelium keratinocytes jeks in response to aggregatibacter actinomycetemcomitans or its purified lipopolysaccharides lps. Veterinary periodontal disease royal veterinary college. However, of the three epithelia comprising the gingival epithelium, the junctional epithelium has much wider intercellular spaces than the sulcular epithelium and oral gingival epithelium. The junctional epithelium je is that epithelium which lies at, and in health also defines, the base of the gingival sulcus. Junctional epithelium the junctional epithelium, or epithelial attachment, joins the ging ival tissues to the tooth using hemidesmosomes. Pdf biological characteristics of junctional epithelium. Gingival sulcus definition of gingival sulcus by medical. Dental procedures such as root planing, subgingival restorative procedures and tooth preparation for crown and bridge fabrication, gingival retraction techniques all damage both the epithelium and the gingival connective tissue.
In their journey toward the gingival sulcus, pmns have been shown to selectively migrate through the junctional epithelium. The sulcus epithelium is a parakeratinized stratified squamous epithelium that lines the lateral surface of the gingival sulcus. This study aims to observe the morphological characteristics and identify the function characteristics of junctional epithelium je tissues and cultured je cells. Pdf the junctional epithelium is located at a strategically important interface between the gingival sulcus, populated with bacteria, and the. The junctional epithelium je adjacent to the tooth is that part of the gingiva. On the other hand, its loosely connected cells allow access for. Localized juvenile spongiotic gingival hyperplasia possibly. Feb 01, 2017 boundaries of gingival sulcus the sulcus is coronal to the attachment of the junctional epithelium bounded by the tooth on one side and the sulcular epithelium on the other the coronal extent of the gingival sulcus is the gingival margin 11. Localized juvenile spongiotic gingival hyperplasia. It is derived from oral sulcular and junctional epithelium. T he sulcus is bathed in crevicular fluid, which contains the elements of immunity and defence. Junctional epithelium an overview sciencedirect topics.
The gingival sulcus the gingival marginal region includes those. Morphological and functional characteristics of human. Gingival sulcus may develop between the gingiva and the surface of the tooth and extend around its circumference. Flossing between your teeth removes plaque and food from the gingival sulcus. He staining and image analysis were performed to measure and compare the morphological difference among je, oral. Conclusion junctional epithelium is important because of its anatomical location.
T he expression of adhesion molecules and the local production of chemotactic cytokines within the epithelium are considered to be key events in neutrophil pmn migration at sites of mucosal infections. The gingival sulcus depth had an average depth of junctional epithelium is located at a strategically important interface between the gingival sulcus, populated with bacteria, and the periodontal soft and mineralized connective tissues that need protection from becoming exposed to bacteria and their products. The amount of li was not associated with a macroscopically visual pathology e. Possibly, je exteriorized from the gingival sulcus would be more prone to irritation from a variety of sources, resulting in inflammation and hyperplasia, with the subsequent development of ljsgh. Computerassisted identification of the gingival sulcus and. The crevicular epithelium, or sulcular epithelium, stands away from the tooth, creating a gingival sulcus, or space that is filled with gingival crevicular fluid gcf see figure 101. Regulation of defensive function on gingival epithelial. The sulcus lining epithelium renews itself rapidly every 46 days compared to 612 days for oral epithelium. The je mediates the attachment of gingiva to the teeth through hemidesmosomes and the internal basal lamina with a unique basement membrane bm composition, while being attached to the connective. The depth of the sulcus latin for groove is bounded by two entities. Gingival and dentogingival junctional tissue quizlet.
Aggregatibacter actinomycetemcomitans induces autophagy in. It is a thin, nonkeratinized, stratified squamous epithelium without rete pegs and extends from the coronal limit of the junctional epithelium to the crest of the gingival margin. They represent a high turnover rate of these epithelium that makes up the gingival sulcus. The ljsgh pattern of ck expression is reminiscent of the profile described in the literature for the junctional epithelium je. Kumar, in molecular medical microbiology second edition, 2015. Gingival sulcus a healthy sulcular depth is 3 millimeters or less.
Expression pattern of adhesion molecules in junctional. The gingiva is composed of gingival epithelium and gingival connective tissue. Gingival sulcus article about gingival sulcus by the free. The junctional epithelium, a nonkeratinized epithelium, forms the floor of the gingival sulcus and extends apically in apposition to the surface of the enamel to form a seal between. The gcf seeps between the epithelial cells and into the gingival sulcus.
The gingival epithelium is the physiologically important interface between the bacterially colonized gingival sulcus and periodontal soft and mineralized connective tissues, requiring protection from exposure to bacteria and their products. He staining and image analysis were performed to measure and compare the morphological difference among je, oral gingival. Histological and immunological characteristics of the junctional. Gingival sulcus article about gingival sulcus by the. Gavota choro partitura pdf regulation of defensive function on gingival epithelial cells can prevent periodontal disease. At the bottom of the sulcus, there is a specific epithelial structure, junctional epithelium, which, on one hand, plays an active role in the defence against microorganisms by allowing polymorphonuclear leukocytes to migrate through intercellular spaces to the gingival sulcus 58. By contrast, the gingival epithelium located at the inner edge of the gingival sulcus is stratified squamous, prompting us to clarify the phenotype of jam1 depletion in gingival epithelium.
Inside the gingival sulcus, the cementumcovered root surface and epithelia are available for microbial attachment. Regulation of defensive function on gingival epithelial cells. Paraffin sections of human molar or premolar on the gingival buccolingual side were prepared from 6 subjects. However, of the three epithelia comprising the gingival epithelium, the junctional epithelium has much wider intercellular spaces. Periodontal considerations for adhesive ceramic dental. There is a constant presence of bacteria and their products in the gingival sulcus which makes this an important structural component of periodontal defense mechanism. Morphological and functional characteristics of human gingival junctional epithelium qian jiang, youcheng yu, hong ruan, yin luo and xuehua guo abstract background. The junctional epithelium is located at a strategically important interface between the gingival sulcus, populated with bacteria, and the periodontal soft and mineralized connective tissues that. Je is a specialized gingival epithelium locating at the junction of periodontal soft tissue and hard tissue, and attaching to the crown or root like a collar. A secondary aim was to devise an automated computerassisted method that allows the examiner to more easily identify the gingival sulcus contour. The intestinal epithelium is simple columnar and forms the luminal surface of the small and large intestine of the gastrointestinal tract.
341 811 198 1174 517 731 277 499 1556 391 47 638 155 1114 737 569 700 13 88 1496 473 1128 1015 1047 821 701 1205 219 660 268 112 742 1076