Periodontal response to long‐term abuse of the gingival attachment by supracrestal amalgam restorations
- 1 November 1989
- journal article
- research article
- Published by Wiley in Journal of Clinical Periodontology
- Vol. 16 (10), 654-659
- https://doi.org/10.1111/j.1600-051x.1989.tb01035.x
Abstract
The combined length of the supracrestal connective tissue attachment and the junctional epithelium is referred to as the "biologic width". The long-term (1-year) effect of complete violation of the supracrestal connective tissue attachment was examined in beagle dogs. Full thickness periodontal flaps were elevated, exposing the buccal bony crests of the maxillary and mandibular canines of 3 beagle dogs. The roots of the experimental teeth were planed and class V cavities were prepared. The apical border of each cavity was located at the alveolar bone crest. The cavities were restored with amalgam and the flaps were repositioned and sutured. In the controls sites, a notch was prepared at the CEJ and the distance between the notch and the body crest was measured. The dogs were sacrificed 57 weeks after the operation and the experimental and control sites prepared for histologic analysis. Every 5th section was examined and measurements were taken of the amount of gingival and bone recession, the length of the connective tissue and the epithelial attachment. Control sites healed uneventfully. Gingival recession averaged only 0.5 mm; bone loss was minimal and averaged 0.15 mm. The combined length of the supracrestal connective tissue and epithelial attachment measured 4.47 mm. In experimental sites, the gingiva receded 3.16 mm on average. Moderate bone loss (.hivin.x = 1.17 mm) was noted, but no signs of bone resorption were seen at the time of sacrifice. After bone loss, root surfaces which were previously attached to alveolar bone by periodontal ligament were mainly (0.90 mm) attached to connective tissue. Mild inflammatory infiltrate was observed in the lamina propria primarily at the restoration area. It is concluded that continuous abuse of the gingival attachment results in a certain loss of the periodontal attachment apparatus. The biologic width is partially restored by a more apical location of a, reduced-in-size, supracrestal connective tissue attachment.Keywords
This publication has 14 references indexed in Scilit:
- Human gingival attachment responses to subgingival crown placement Marginal remodellingJournal of Clinical Periodontology, 1986
- Periodontal attachment responses to surgical injury in the cat*Journal of Clinical Periodontology, 1986
- Recession in sites with inadequate width of the keratinized gingival An experimental study in the dogJournal of Clinical Periodontology, 1984
- Relationship between restorations and the level of the periodontal attachmentJournal of Clinical Periodontology, 1982
- Physiologic Dimensions of the Periodontium Significant to the Restorative DentistThe Journal of Periodontology, 1979
- Gingival reaction to well-fitted subgingival proximal gold inlaysJournal of Clinical Periodontology, 1974
- The Relationship Between the Location of Subgingival Crown Margins and Gingival InflammationThe Journal of Periodontology, 1974
- Overhanging Dental Restorations and Periodontal DiseaseThe Journal of Periodontology, 1971
- Periodontal conditions in patients treated with dental bridges.Journal of Periodontal Research, 1970
- Dimensions and Relations of the Dentogingival Junction in HumansThe Journal of Periodontology, 1961