The je attaches to the surface of the tooth by way of the ea with hemidesmosomes and is, on average, roughly 1 mm in width in the apicocoronal dimension, constituting about one half of the biologic width. Review article biologic width informatics journals. Direct bone level after flap reflection was recorded. Biological characteristics of the junctional epithelium.
The concept of biologic width forms a basis for successful periimplant. Biological width and the health of the periodontium are inseparable. In two studies, the dimensions of the junctional epithelium and the connective tissue attachment were separately measured. Based on the 1961 paper by gargiulo, the mean biologic width was determined to be 2.
The objective of the present study was to correlate radiographic findings of biologic width invasion with the periodontium status. Apr 16, 2020 the biologic width is defined as the coronal dimension to the alveolar bone that is occupied by healthy gingival tissue. Based on the available evidence, different factors may influence biological width around implants including the surgical technique, implant loading, implant surface properties, abutment materials, implant position, and width of the periimplant mucosa. Nicola baldini fabio vignoletti biological width around implants. Biologic width, crown lengthening, orthodontic extrusion. The concept of biologic width forms a basis for successful periimplant soft tissue integration around titanium implants. Junctional epithelium or epithelial attachment around. Show full abstract fgm, attachment level, pocket depth, bone level, biological width bw were recorded at baseline, 1, 3 and 6 months. Dentistryperio term definition what is biological width. This article gives a brief overview about the concept of biological width.
When a restoration is placed on a tooth in violation of this principle, a chronic inflammatory response occurs. Clinical and radiographic evaluation of the periodontium. Biological width following immediate implant placement in the. Biologic width and its importance in periodontal and restorative. The junctional epithelium and connective tissue act as a barrier separating deep periodontal tissues from the outside environment. Pdf morphological measurement of biologic width in chinese. The length of the junctional epithelium in the flapless group was 2. Rezaei esfahrood z, kadkhodazadeh m, gholamin p, amid r, passanezi e, hosein zadeh h. The invasion is confined to the junctional epithelium but still violates the 2. Nov 12, 2009 thus 3 mm allows for 1 mm of supracrestal connective tissue attachment, 1 mm of junctional epithelium and 1 mm for sulcus depth. Biologic width understanding and its preservation ijmds. Clinical and radiographic evaluation of the periodontium with.
Biologic width bw is the physiologic dimension of the junctional epithelium and connective tissue attachment located between the base of the sulcus and the. Jan 14, 2018 biologic width is the combined width of connective tissue and epithelial attachment superior to the crestal bone. Factors affecting the crestal bone loss4,5 biologic width seal biologic width forms within the first 6 weeks after the implantabutment junction has been exposed to the oral cavity. The length of the junctional epithelium varied within a rather narrow. Among them, the je attaches to the tooth surface via hemidesmosomes, which forms the frontline of defense against periodontal bacterial infection. Paraffin sections of human molar or premolar on the gingival buccolingual side were prepared from 6 subjects. Nevins and skurow 1984 limiting the subgingival margin extension to 0.
Connective tissue 1 mm and junctional epithelial 1 mm distinguish the following degress of keratinization. It should be noted, however, that 3 mm assumes a biological width of approximately 2. Clinical evaluation of the biological width following. There was a statistically significant correlation between the bone crest p width with a crown margin and still be above the cej. The biological width is defined as the dimension of the soft tissue.
Nevins and skurow stated that when subgingival margins are indicated, the restorative dentist must not disrupt the junctional epithelium or connective tissue. On violating the biological width by dental restorations. According to ingber, rose and coslet,1 cohen is credited with introducing the term biological width to describe the combined width of the cta and je. Biologic width and its importance in periodontal and restorative dentistry. The probing depth of the gingival sulcus is measured by a calibrated periodontal probe. The junctional epithelium je is that epithelium which lies at, and in health also defines, the base of the gingival sulcus. Babitha nugala 1, bb santosh kumar 2, s sahitya 3, p mohana krishna 1 1 department of periodontics, peoples college of dental sciences, bhopal, madhya pradesh, india 2 department of periodontics, m. The biologic width is patient specific and may vary anywhere from 0. It were included 14 patients with restored teeth with biological width invasion, on the proximal sites, observed clinically and radiographically. The junctional epithelium does lay on enamel for about 1mm but is a very weak adaptation of epithelium to enamel glycoprotein attachment, sticky. The studies referred to the length of the epithelium from the periimplant mucosa margin to the apical portion of the junctional. Functions dynamic aspects of junctional epithelium regeneration role of je in initiation of pocket formation junctional epithelium around implants. The most prevalent tooth with biological width invasion was the first molar.
Consideration of the biologic width in restorative dentistry seems to. Nicola baldini fabio vignoletti biological width around. The biological width is also defined as the dimension of the soft. This 3 mm constitutes for 1 mm supracrestal connective tissue attachment, 1 mm junctional epithelium and 1 mm for gingival sulcus on an average. Kois3 expanded the term to biological zone to embrace the. The millimeter that is needed from the bottom of the junctional epithelium to the tip of the alveolar bone is held responsible for the lack of inflammation and bone resorption, and as such the. Biologic width, crown lengthening, periodontal health.
Any violation of the biological width impairs the normal periodontium. Invading the biologic width with a restoration can result in localized crestal bone loss, gingival recession, localized gingival hyperplasia, or a combination of these three. Introduction biologic width bw is a physiologically formed and stable vertical dimension of the dentogingival junction that comprised the sulcus depth sd, junctional epithelium je, and connective tissue attachment cta. The length of the junctional epithelium varied within a rather narrow range.
The length of the biologic width results from the addition of both dimensions. Immediately apical to the base of the pocket, and coronal to the most coronal of the gingival fibers is the junctional epithelium. Dental implants, junctional epithelium, oral mucosa. The biologic width includes both the connective tissue attachment and the junctional epithelium and has a mean dimension of approximately 2 mm.
Biologic width considering periodontium in restorative. This would be far enough away from bone that it didnt violate the attachment, but also leave the margin subgingival, as the facial gingival margin is. Junctional epithelium an overview sciencedirect topics. Pat if the bw is normal in an adult violation of the bw indeed could happen by intrusion into the junctional epithelium as that is part of the bw. The height of the suprabony connective tissue in this model varied between 1. Jennifer chang, clerk, beethoven orthodontic center. Factors affecting the crestal bone loss4,5 biologic widthseal biologic width forms within the first 6 weeks after the implantabutment junction has. The subcrevicular physiologic space is analogous to the biologic width described gargiuloetal 1961. Is analogous to the biologic width described gargiulo et al. Invading the biologic width with a restoration can result in. Morphological measurement of biologic width in chinese people. Biologic width and its importance in periodontal and.
Biological width following immediate implant placement in. Table1 interproximally biologic width interproximally the biological width is similar to that of the facial surface 2, 3 but. Lateral to the junctional epithelium at a distance of 50 m, a crevicular. The gingival epithelium consists of the oral gingival epithelium oge, oral sulcular epithelium ose, and junctional epithelium je fig. Clinical study biological width around one and twopiece. Sep 30, 2018 when i believed biologic width was the same for every patient the 2 mm described by gargiulo in 1961, i thought the solution to margin placement was simple. A comprehensive guide to biologic width spear education. Histometric analysis of undecalcified histologic sections included the evaluation of the sulcus depth sd, the dimensions of the junctional epithelium je, and the connective tissue contact ctc. In rodents, the je is clearly distinguished from ose. No violation zone ashu sharma 1, gr rahul 1, bhawna gupta 2, mozammil hafeez 2 1 department of prosthodontics and oral implantology, bangalore institute of dental sciences and research center, bangalore, karnataka, india 2 house surgeon, bangalore institute of dental sciences and research center, bangalore, karnataka, india. Dimension of the periimplant mucosa berglundh 1996. Abstract biological width and the health of the periodontium are inseparable. Histological and immunological characteristics of the.
The junctional epithelium of the periimplant mucosa at both the test and control side. R ambedkar dental college and hospital, bangalore, karnataka, india 3. Historical perspectives the epithelial attachment around teeth was first. Importance of biological width in periodontal and restorative dentistry. Distance of tissue that isolates alveolar bone from oral cavity. Soft tissueimplant interface is an important anatomical feature contributing to the longterm success of dental implants. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Proper margin placement of any type of restoration requires respect for the physiologic principle of biologic width. Mar 12, 2014 on violating the biological width by dental restorations update below a recent case report 1 by frese et al. Evaluation and correction of its violation experiences tissue discomfort when the restoration margin levels are being assessed with a periodontal probe, it is a good. The authors recommended limiting subgingival margin extension to 0.
961 978 879 140 1288 380 235 1448 1040 1175 525 1020 12 638 576 1088 656 738 1194 1457 978 1194 779 953 1451 798 179 141 1378 325 740 500 296 58 43 655 79 1493 1278 1134 829