DENTOGINGIVAL UNITBy- Dr Rohit Rai Content • Junctional epithelium • Gingival fiber • Clinical importance of dentogingival unit. Shift of the dento gingival junction The dentogingival junction is an anatomical and functional interface between the gingiva and the tooth. PDF | This study define altered passive eruption (APE) and evaluate the morphology of the dentogingival unit. individuals subjected to.
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Intrasulcular margin placement must be accepted as inevitable. With reference to the norm, an excessive amount of gingival tissue or an inadequate position of the osseous crest related to the CEJ can be stated.
The length of the DGU can be either determined by histologic preparations or by transgingival probing.
The physiologic dentogingival unit DGUalso known as the biologic width, is considered to be essential for longevity of the teeth as well as of restorations. This clinical situation presents, on the buccal level, similarities to that described in Figand suggests treatment possibilities.
Different physiological situations do not exhibit this morphological disposition, however, and the gingival margin tends to occupy a much more incisal position — thus giving rise to short clinical crowns. Transgingival probing with rubber stop Click here to view. Invasion of this space triggers inflammation and causes periodontal destruction.
In our series the mean distance was found to be 1. In turn, the variable overlap refers to the percentage anatomical crown covered by the gingival Fig. Our own results support this notion. Rufenacht The preservation of a healthy periodontal attachment is a prerequisite for successful restorative procedures.
Dimensions of the dentogingival unit in maxillary anterior teeth: Transgingival probing trans-sulcular was done for these same patients and length of the DGU was measured. Tooth eruption comprises two phases 7: It describes the dimensions and relations of the different elements of the dentogingival unit.
7. Esthetic Management of the Dentogingival Unit
Table 2 Parallel Profile Radology data. The combined uniit of the connective tissue attachment and the junctional epithelium reaches 2. Log In or Register to continue. How to cite this URL: This article has been cited by. It has been demonstrated that margin placement, fit of restoration, restorative material, emergence profile, and tooth contour are factors that may contribute to the disturbance of this state of health.
How to cite this URL: Biologic width dimensions – a systematic review. Therefore, the space between the bone crest and cementoenamel junction may already be determined from this pre-eruptive stage.
On the relationship between crown form and clinical features of the gingiva in adolescents. A more precise classification, based on histologic findings of clinical situations in the adult exhibiting deviations from this normality, has been proposed.
The position of cementoenamel junction relative to the alveolar crest does not allow the normal insertion of the connective tissue attachment. Many authors have investigated the causes and mechanisms that may lead to tooth eruption failure, though few studies have related such mechanisms to the morphology adopted by the coronal periodontium 8.
This study was undertaken to evaluate an innovative radiographic exploration technique parallel profile radiography [PPRx] for uint the dimensions of the DGU on the labial surfaces of maxillary anterior teeth dentogingval to provide additional information on the dimensions of the DGU in humans. Gutta-percha point and lead plate aligned with the long axis of tooth Click here to view. Although width can also be assessed by transgingival probing or with an ultrasound device, they are either invasive or expensive Aims: Radiographic analysis of alveolar crest height and age.
7. Esthetic Management of the Dentogingival Unit | Pocket Dentistry
At the dentogingival junction DGUthe presence of APE is associated to a thick bone crest and connective tissue attachment, with a long biological space.
Related articles Dentogingival unit gingival thickness radiographs. Evaluation of an innovative radiographic technique – parallel profile radiography – to determine the dimensions of dentogingival unit.
Despite the clinical relevance of the determination of the length and width of the DGU, there is no standardized technique. The blue line reflects the proportion of cases not presenting APE for an overlap less than or equal to that indicated on the abscissas axis. Statistical analysis confirms the presence of two morphological patterns of APE, respectively characterized by a longer and shorter distance from cementoenamel junction to bone crest.
The biologic width appears to exist in any periodontium, and the importance of not violating this physiologic dimension was suggested by Ochsenbein and Ross 9 and stressed by other authors.
Int Dent J ; It may be that passive eruption or the apical shift of the gingivo-epithelial junction is not a physiologic process. Esthetic Management of the Dentogingival Unit.
Morphology and dimensions of the dentogingival unit in the altered passive eruption
After demonstrating this correlation, an evaluation was made of the percentage overlap that best distinguishes i. The ‘Biologic width’ a concept in periodntics and restorative dentistry. Two subjective criteria were contemplated for the clinical diagnosis of APE: Paralleling device in position Click here to view. According to our results, the dimensions of the DGU elements associated to tooth 21 with APE are a thick bone crest and connective tissue attachment, a long biological space, and a short distance from cementoenamel junction to bone crest.