由不同宏观结构种植体支撑的全牙弓修复体:多中心随机对照试验

Ana Carolina Monachini Marcantonio, Guilherme José Pimentel Lopes de Oliveira, Paulo Afonso Tassi, João Paulo Lavagnoli Manfrinato, Bruno Segnini, Raphael Ferreira de Souza Bezerra Araújo, Larissa Carvalho Trojan, Flávia Noemy Gasparini Kiatake Fontão, Ivete Aparecida de Mattias Sartori, Elisa Mattias Sartori, Luis Eduardo Marques Padovan, Daniela Leal Zandim-Barcelos, Elcio Marcantonio
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引用次数: 0

摘要

研究目的本研究评估了具有亲水性表面和两种不同大体结构的种植体的临床表现:带有穿孔三角螺纹的圆柱形种植体(CT)和带有方形螺纹和凝结穿孔三角螺纹的圆柱锥形种植体(TST):这是一项多中心分口、单盲、随机对照试验。30 名下颌无牙患者分别接受了两个 CT 和两个 TST 种植体。通过插入扭矩和共振频率分析(RFA)确定种植体的基本稳定性。种植体植入后 24 小时内装入全固定拱形义齿。在种植体植入后的 2、6、12 和 24 个月对临床参数(可见斑块指数、边缘出血指数、探诊出血、探诊深度和临床附着水平)和共振频率分析进行评估。通过比较种植体植入当天及其后 6、12 和 24 个月的标准化 X 光片,测量边缘骨水平的变化:结果:28 名患者完成了为期两年的随访。CT 种植体的存活率为 99.16%,TST 种植体的存活率为 100%。一个 CT 种植体在 2 个月的随访中丢失。两种种植体在边缘骨水平变化(6、12和24个月时分别为CT 0.34 [0.24; 0.55 mm]; 0.33 [0.18; 0.55 mm]; 0.41 [0.12; 0.7 mm] vs TST 0.36 [0.14; 0.74 mm]; 0.33 [0.23; 0.63 mm]; 0.30 [0.20; 0.64 mm])和其他临床参数方面无明显差异:结论:种植体的宏观结构对存活率、主要和次要稳定性、边缘骨水平变化和种植体周围临床参数结果没有影响。这两种种植体均可用于下颌全拱修复体的即刻加载。
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Full-arch prostheses supported by implants with different macrostructures: A multicenter randomized controlled trial.

Objectives: This study evaluates the clinical performance of implants with hydrophilic surface and two different macrostructures: cylindrical with perforating triangular threads (CT) and cylindrical-tapered with the association of square and condensing and perforating triangular threads (TST).

Materials and methods: This was a multicenter split-mouth, simple-blinded, randomized, and controlled trial. Thirty patients with edentulous mandible received two CT and two TST implants. Primary stability was determined by insertion torque and resonance frequency analysis (RFA). Implants were loaded with full fixed-arch prostheses within 24 h after insertion. Clinical parameters (visible plaque index, marginal bleeding index; bleeding on probing; probing depth; and clinical attachment level) and the RFA were assessed at 2, 6, 12, and 24 months after implant loading. Marginal bone level changes were measured by comparison of standardized radiographs taken on the day of implant placement and 6, 12, and 24 months thereafter.

Results: Twenty-eight patients completed the 2-year follow-up. The survival rates were 99.16% for CT implants and 100% for TST implants. One CT implant was lost until the 2 months follow-up. No significant differences were found between the two implant types for marginal bone level changes (CT 0.34 [0.24; 0.55 mm]; 0.33 [0.18; 0.55 mm]; 0.41 [0.12; 0.7 mm] vs TST 0.36 [0.14; 0.74 mm]; 0.33 [0.23; 0.63 mm]; 0.30 [0.20; 0.64 mm] at 6, 12, and 24 months, respectively) and other clinical parameters.

Conclusion: The macrostructure of the implants had no influence on survival rate, primary and secondary stability, marginal bone level changes, and peri-implant clinical parameters outcomes. Both implants can be predictably used for immediate loading of full-arch mandibular prostheses.

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