Saldanha Diego V, Gomes Sabrina C, Souza Daniela M, Cavagni J, Oppermann Rui V
School of Dentistry, Federal University of Rio Grande do Sul (UFRGS)-Porto Alegre-RS-Brazil.
Acta Odontol Latinoam. 2012;25(1):45-52.
The aim of this study was to evaluate the periodontal response to subgingival restorations in dogs with naturally occurring periodontitis. At the baseline, the experimental teeth from three dogs (2nd and 3rd upper premolars and 2nd, 3rd and 4th lower premolars) were randomly assigned to Resin-modified Glass Ionomer Cement (RMGIC) and Amalgam (AM) restorations or controls (CT) at the buccal sites with (SUPRA+) or without mechanical supragingival plaque control (SUPRA) and maintained for 90 days. Clinical [Periodontal Probing Depth (PPD), Clinical Attachment Loss (CAL), and Gingival Margin Recession (GMR)], histological (connective tissue inflammatory and epithelium condition) and histometric evaluation (distance between the apical border of the cavity and the bone level and between the apical extension of the epithelium and the bone level) were performed by a calibrated blinded examiner. Better clinical (especially regarding CAL) and histological results (unaltered epithelium and less severe inflammatory connective tissue) were observed associated with RMGIC sites. Histometric evaluation showed less bone loss associated to RMGIC. Overall, SUPRA+ sites presented less inflammatory response. It could be concluded that in dogs with periodontitis, subgingival RMGIC restorations, especially in the presence of supragingival plaque control, elicited better periodontal response than AM restorations.
本研究的目的是评估患有自然发生的牙周炎的犬只对龈下修复体的牙周反应。在基线时，将三只犬的实验牙齿（上颌第二和第三前磨牙以及下颌第二、第三和第四前磨牙）在颊侧部位随机分配至树脂改性玻璃离子水门汀（RMGIC）修复组、汞合金（AM）修复组或对照组（CT），其中一些部位进行机械性龈上菌斑控制（SUPRA+），另一些不进行（SUPRA），并维持90天。由一位经过校准的盲法检查者进行临床评估[牙周探诊深度（PPD）、临床附着丧失（CAL）和牙龈边缘退缩（GMR）]、组织学评估（结缔组织炎症和上皮状况）以及组织测量评估（洞缘顶端与骨水平之间的距离以及上皮顶端延伸与骨水平之间的距离）。观察到RMGIC修复部位的临床结果（尤其是CAL方面）和组织学结果更好（上皮未改变且结缔组织炎症较轻）。组织测量评估显示RMGIC修复部位的骨丧失较少。总体而言，SUPRA+部位的炎症反应较小。可以得出结论，在患有牙周炎的犬只中，龈下RMGIC修复体，尤其是在存在龈上菌斑控制的情况下，比AM修复体引发更好的牙周反应。
