Position of gingival margin and junctional epithelium. 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. Computerassisted identification of the gingival sulcus. Periodontal considerations for adhesive ceramic dental. During development, reduced enamel epithelium fuses with oral epithelium and forms along crown to level of cej. The sulcular epithelium is extremely important, because it may act as a semipermeable membrane through. 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. This study aims to observe the morphological characteristics and identify the function characteristics of. The junctional epithelium is a nonkeratinizing stratified epithelium in contact with the sulcus epithelium and thegingival connective tissue fig. The sulcus lining epithelium renews itself rapidly every 46 days compared to 612 days for oral epithelium. 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. Gingival sulcus article about gingival sulcus by the free. Inside the gingival sulcus, the cementumcovered root surface and epithelia are available for microbial attachment. The sulcus epithelium is a parakeratinized stratified squamous epithelium that lines the lateral surface of the gingival sulcus.
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. Continuing from the sulcular epithelium is the very thin nonkeratinised junctional epithelium. Junctional epithelium the junctional epithelium, or epithelial attachment, joins the ging ival tissues to the tooth using hemidesmosomes. The gcf seeps between the epithelial cells and into the gingival sulcus.
The sulcular epithelium lines the sulcus, which is the space between the gingiva and the enamel surface of the tooth. Erupted teeth are surrounded by the gingival epithelium, which is. Veterinary periodontal disease royal veterinary college. Gavota choro partitura pdf regulation of defensive function on gingival epithelial cells can prevent periodontal disease. Hence, the aim of the present study was to characterize the cell adhesion structure in the junctional epithelium compared with the other two epithelia. The junctional epithelium je is that epithelium which lies at, and in health also defines, the base of the gingival sulcus. 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. Material and methods this in vitro study was carried out on 36 sites on the lingual surface of eight mandibles from healthy young. 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 gingival sulcus the gingival marginal region includes those. Pmns play a role in innate immunity while monocytesmacrophages and. Junctional epithelium an overview sciencedirect topics.
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. It is the site of hostbacterial interaction in initiation of periodontal disease. Gingival and dentogingival junctional tissue 72 terms. In their journey toward the gingival sulcus, pmns have been shown to selectively migrate through the junctional epithelium. Gingival and dentogingival junctional tissue quizlet. Black in which he observed that the gingival tissue is attached to the cementoenamel junction. Morphological and functional characteristics of human. The conversion of the junctional epithelium to pocket epithelium is regarded as hallmark in the development of periodontitis. The probing depth of the gingival sulcus is measured by a calibrated periodontal probe. Junctional epithelium located at an interface of gingival sulcus and periodontal connective tissue, provides a dynamic seal around the teeth, protecting the. Aggregatibacter actinomycetemcomitans induces autophagy in. The junctional epithelium, in continuation with the oral. The gingival sulcus is an area of potential space between a tooth and the surrounding gingival tissue and is lined by sulcular epithelium. Besides, neutrophil adefensins was found to localize in the junctional epithelium, which has significant effects on the epithelial integrity and.
The gingival junctional epithelium is located at a strategically important interface at the bottom of the gingival sulcus and actively contributes to inflammatory processes. Little, however, is known about the molecular mechanisms involved in this key process aimed at the control of subgingival bacterial plaque. The gingival margin is the transition epithelium between the keratinised oral and the nonkeratinised sulcular epithelium fig. Regulation of defensive function on gingival epithelial. This study aims to observe the morphological characteristics and identify the function characteristics of junctional epithelium je tissues and cultured je cells. 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.
Immediately apical to the base of the pocket, and coronal to the most coronal of the gingival fibers is the junctional epithelium. Computerassisted identification of the gingival sulcus and. It forms a band 23 mm wide around the tooth, and is approximately 1530 cells thick coronally and tapers to a single cell apically. In addition, gingival crevicular fluid gcf is exuded by the periodontal tissue into the gingival sulci and pockets, where it mixes with saliva. 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. 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. The junctional epithelium represents the main site of the initial interaction between the host and the dysbiotic biofilm.
The combination of these two measurements constitutes 2mm of space for biologic width gargiulo, krajewski et al. The gingival sulcus is the natural space found between the tooth and the gum tissue that surrounds the tooth, known as the free gingiva. The junctional epithelium je is an epithelial component that is directly attached to the tooth surface and has a protective function against periodontal diseases. 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.
Biological characteristics of the junctional epithelium. Visualization of junctional epithelial cell replacement by oral gingival. 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. As the junctional epithelium becomes inflamed and oedematous it separates from the root surface. Regulation of defensive function on gingival epithelial cells. Neutrophil migration into the gingival sulcus is associated. He staining and image analysis were performed to measure and compare the morphological difference among je, oral gingival.
Pdf biological characteristics of junctional epithelium. He staining and image analysis were performed to measure and compare the morphological difference among je, oral. The amount of li was not associated with a macroscopically visual pathology e. Aug 03, 2015 conclusion junctional epithelium is important because of its anatomical location. The intestinal epithelium is simple columnar and forms the luminal surface of the small and large intestine of the gastrointestinal tract. Localized juvenile spongiotic gingival hyperplasia possibly. Here, we investigated the role of autophagy in junctional epithelium keratinocytes jeks in response to aggregatibacter actinomycetemcomitans or its purified lipopolysaccharides lps. Junctional epithelium wikimili, the free encyclopedia. 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. Role of gingival lymphatics in tissue fluid balance and.
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. Renewal of gingival epithelium cell division cell shedding the dentogingival junction. External basal lamina between the junctional epithelium and the lamina propria at the apical extent of the je. Little, however, is known about the molecular mechanisms involved in. On the other hand, its loosely connected cells allow access for. 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. The gingival sulcus is bounded by the enamel of the crown of the tooth and the sulcular epithelium. The gingiva is composed of gingival epithelium and gingival connective tissue.
Gingival cervicular fluid gcf what contains both the immunological components and cells of the blood. Several families of antimicrobial peptides have been identified in oral cavity which includes alphadefensins, betadefensins, calprotectin, adrenomedullin, histatins, and cathelicidin. Gingival and dentogingival junctional tissue pocket. The junctional epithelium je adjacent to the tooth is that part of the gingiva which attaches the connective tissue to the tooth surface fig. Conclusion junctional epithelium is important because of its anatomical location. The gingival sulcus is located between the tooth and the free gingival margin and is the crevice that surrounds the tooth. 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. Its unique structural and functional adaptation enables the junctional epithelium to control the constant microbiological challenge. Histological and immunological characteristics of the junctional. Both the sulcular epithelium and junctional epithelium are difficult to see in clinical examination of healthy gingival tissue. 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. Paraffin sections of human molar or premolar on the gingival buccolingual side were prepared from 6 subjects. Gingival sulcus article about gingival sulcus by the.
Localized juvenile spongiotic gingival hyperplasia. Gingival sulcus may develop between the gingiva and the surface of the tooth and extend around its circumference. Junctional epithelium wikipedia republished wiki 2. 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. Gingival sulcus definition of gingival sulcus by medical.
It is derived from oral sulcular and junctional epithelium. Apr, 2019 the junctional epithelium je is that epithelium which lies at, and in health also defines, the base of the gingival sulcus. Pdf the junctional epithelium is located at a strategically important interface between the gingival sulcus, populated with bacteria, and the. 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. 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. They represent a high turnover rate of these epithelium that makes up the gingival sulcus. Gingival sulcus a healthy sulcular depth is 3 millimeters or less. 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. The sulcus is literally the area of separation between the surrounding epithelium and the surface of the encompassed tooth. T he sulcus is bathed in crevicular fluid, which contains the elements of immunity and defence. 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. The junctional epithelium je adjacent to the tooth is that part of the gingiva.
Gingival and dentogingival junctional tissue flashcards. Morphological and functional characteristics of human gingival. Several families of antimicrobial peptides have been identified in oral cavity which includes alphadefensins, betadefensins, calprotectin. 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 need protection from becoming exposed to bacteria and their products. In vitro reconstruction of human junctional and sulcular. The junctional epithelium originates from the odontogenic. Expression pattern of adhesion molecules in junctional. The depth of the sulcus latin for groove is bounded by two entities. Kumar, in molecular medical microbiology second edition, 2015. Flossing between your teeth removes plaque and food from the gingival sulcus.1446 1477 575 879 448 1007 457 504 433 699 1259 919 291 223 1109 992 826 1251 1256 594 827 762 566 953 897 763 1067 1301 584 792