Publications (2)1.99 Total impact
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ABSTRACT: Rocha AL, Shirasu BK, Hayacibara RM, Magro-Filho O, Zanoni JN, Araújo MG. Clinical and histological evaluation of subepithelial connective tissue after collagen sponge implantation in the human palate. J Periodont Res 2012; 47: 758-765. © 2012 John Wiley & Sons A/S Background and Objective: Successful root-coverage treatment depends on the thickness of the donor tissue. This study aimed to evaluate the thickness of donor tissue after augmentation of the connective tissue in the palatal area by implantation of lyophilized collagen sponge (Hemospon(®) ). Material and Methods: Ten patients with an indication for root coverage, whose palate was deficient in adequate connective tissue, were recruited. The procedure was carried out in two stages. In the first stage, the palatal thickness in the donor site was measured at three standardized points (points 1, 2 and 3), from the distal of the canine to the distal of the first molar, and the lyophilized collagen sponge was inserted. In the second stage, the palatal thickness over the implant was measured (at points 1, 2 and 3), two biopsies of the palatal mucosa were collected - one over the implant (experimental sample) and the other on the contralateral side (control sample) - and then root-coverage treatment was performed. Analyses consisted of clinical assessment of the palatal measurements before and after sponge implantation, and histological assessment of the experimental and control biopsy samples. Data were analyzed using the Wilcoxon test. Results: Both analyses showed a significant increase in mean thickness, of 1.08 mm of neoformed tissue in the clinical analysis (the tissue at point 2 was the thickest of the three points) and of 0.53 mm in the histological analysis. Conclusion: The insertion of lyophilized collagen sponge induced a significant increase in the thickness of palatal connective tissue.Journal of Periodontal Research 07/2012; 47(6):758-65. · 1.99 Impact Factor
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ABSTRACT: AIM: the purpose of the present study was to compare periodontal indexes after the use of two types of bonded fixed retainers: conventional 3x3 plain retainer (orthodontic wire 0.8mm, bonded to the canine teeth only) and the modified retainer (0.6mm multi strand wire, allowing free access to dental floss and bonded to all anterior teeth). METHODS: a test group of fifteen patients used the conventional retainer for 6 months. After a two week interval, the modified retainer was used for another 6 months. Previous to each phase, the patients went through tooth scaling, root planing and oral hygiene orientation. At the end of each phase the dental plaque index, gingival index and dental calculus index were evaluated. Furthermore, the calculus accumulation along the retainer wire was measured and all patients answered a questionnaire about the use, acceptance and comfort of both types of retainers. RESULTS AND CONCLUSIONS: the scores for the plaque and gingival indexes were higher for the modified retainer (p<0.05) in the lingual and proximal surfaces. The same occurred with the calculus index in the proximal surfaces (p<0.05). The calculus along wire index also scored higher (p<0.05) for the modified retainer. All patients described the use of the conventional retainer as being more comfortable. Therefore, it was concluded that the conventional retainer is a better treatment choice than the modified retainer.Revista Dental Press de Ortodontia e Ortopedia Facial 02/2007; 12(1):41-47.
Universidade Estadual de MaringáMaringá, Paraná, Brazil