International Dentistry Research Cathedra, Universidad Católica San Antonio de Murcia (UCAM), Murcia, Spain.
Division of General Dentistry, Eastman Institute for Oral Health, University of Rochester, Rochester, NY, USA.
Clin Oral Implants Res. 2018 Jun;29(6):635-643. doi: 10.1111/clr.12775. Epub 2016 Jan 7.
To evaluate marginal bone loss over 5 years around microthreaded implants placed in the maxillary anterior/esthetic zone and immediate restored with non-occlusal loading.
Seventy-one implants (with microthreads up to the platform-rough surface body and neck, internal connection and platform switching) were placed in healed bone in the maxillary arches of 30 men and 23 women (mean age 37.85 ± 7.09 years, range 27-60). All subjects had at least 3 mm of soft tissue to allow the establishment of adequate biologic width and to reduce bone resorption. Each patient received a provisional restoration immediately after implant placement with slight occlusal contact. Mesial and distal bone height was evaluated using digital radiography on the day following implant placement (baseline) and after 1, 2, 3, 4 and 5 years. Primary stability was measured with resonance frequency analysis.
No implants failed, resulting in a cumulative survival rate of 100% after 3 years. Marginal bone loss from implant collar to bone crest measured at baseline (peri-implant bone defect at the fresh extraction socket) and after 5 years was 0.90 mm ± 0.26 mm. Mesial and distal site crestal bone loss ranged from 3.42 ± 1.2 mm at baseline to 3.51 ± 1.5 mm after 5 years and from 3.38 ± 0.9 mm at baseline to 3.49 ± 0.9 mm after 5 years, respectively (P = 0.086).
The results of this study showed limited implant crestal bone loss 0.90 mm ± 0.26 mm and 100% of implant survival rate at 5-year follow-up of immediate restored implants with rough surface neck and microthreads.
评估微螺纹种植体在前/美学区上颌骨中放置 5 年后的边缘骨丧失情况，以及非咬合负荷即刻修复。
71 枚种植体（具有微螺纹直至平台粗糙表面体和颈部、内部连接和平台转换）被放置在 30 名男性和 23 名女性的上颌牙槽骨中（平均年龄 37.85±7.09 岁，范围 27-60）。所有患者都有至少 3mm 的软组织，以允许建立足够的生物学宽度并减少骨吸收。每位患者在种植体放置后立即接受临时修复，轻微接触咬合。在种植体放置后的第二天（基线）以及 1、2、3、4 和 5 年后，使用数字射线照相术评估近中和远中骨高度。使用共振频率分析测量初始稳定性。
没有种植体失败，因此 3 年后的累积存活率为 100%。从种植体颈缘到牙槽嵴测量的边缘骨丧失在基线时（新鲜拔牙窝的种植体周围骨缺损）和 5 年后分别为 0.90mm±0.26mm。近中和远中牙槽嵴骨丧失分别从基线时的 3.42mm±1.2mm增加到 5 年后的 3.51mm±1.5mm和从基线时的 3.38mm±0.9mm增加到 5 年后的 3.49mm±0.9mm（P=0.086）。
这项研究的结果显示，在 5 年随访中，具有粗糙表面颈部和微螺纹的即刻修复种植体的边缘骨丧失为 0.90mm±0.26mm，种植体存活率为 100%。
