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- Title
Preprosthetic Periodontal Surgery in the Proximal Area With Modification of the COL Area: Results Following the Reestablishment of the Contact Point.
- Authors
Papalexiou, Vula; Novaes Jr., Arthur B.; Macedo, Guilherme O.; Luczyszyn, Sonia Mara; Muglia, Valdir A.
- Abstract
Background: Anatomic characteristics of interproximal areas are dependent on the anatomy, position, and proximal contact of adjacent teeth. The objective of this study was to investigate the influence of the reestablishment of the interproximal contact following the restorative alveolar interface (RAI) procedure on the interproximal gingival COL and formation of the interdental gingival papilla. Methods: Six mongrel dogs received bilateral apically positioned flaps, crown lengthening, and the RAI procedure on the maxillary fourth bicuspid and first molar. After 2 weeks, in a randomized manner, one side was prepared to receive metallic crowns and the opposite side remained as the control. The crowns were cemented at the 4-week postoperative period, and the dogs were sacrificed after an other 4 weeks, totaling a period of 4 weeks with the full crowns in position and a total of 8 postoperative weeks. Histologic specimens were stained with hematoxylin and eosin and Mallory dyes. Sections 6 µm thick were obtained in a bucco-lingual plane allowing ample visualization of the interproximal area. Results: Clinical measurements revealed that, in the restored sides, four animals had complete full of the interdental spaces with gingival papilla, whereas the other two dogs had a distance from the contact point to the tip of papilla varying from 0.02 to 0.021 mm. In the control group, papillae were totally reepithelialized with keratinized epithelium and a convex form. The epithelium completely covered the connective tissue and showed both epithelial projections and surface desquamation. On the test group, despite the presence of the prosthesis, the COL morphology modified by preprosthetic surgery was not altered, presenting a convex papilla with a triangular form and with a keratinized epithelium. Additional histologic characteristics were the same as found in the control group. Conclusion: Based on the results of this study, the reestablishment of the contact point does not revert what was obtained with the RAI procedure; the interproximal tissues remain convex and keratinized.
- Subjects
DENTAL implants; TEETH; DENTAL fillings; DENTAL crowns; BICUSPIDS; MOLARS
- Publication
Journal of Periodontology, 2006, Vol 77, Issue 11, p1856
- ISSN
0022-3492
- Publication type
Article
- DOI
10.1902/jop.2006.050397