Versilia Hospital, Tuscan Stomatologic Institute, Lido di Camaiore, Italy; School of Dentistry, Saint Camillus International University of Health and Medical Sciences, Rome, Italy.
Versilia Hospital, Tuscan Stomatologic Institute, Lido di Camaiore, Italy.
J Stomatol Oral Maxillofac Surg. 2023 Dec;124(6S):101582. doi: 10.1016/j.jormas.2023.101582. Epub 2023 Jul 31.
The aim of the present clinical and radiologic retrospective study was to evaluate alveolar bone remodeling, in terms of alveolar width and peri‑implant bone level, two years after immediate implant positioning (with two different collar lengths, 0.8 mm and 2.0 mm) and loading of preformed healing cap. The Null hypothesis, H0 is: there was no difference between the two groups of implants.
Patients suffering from single-tooth edentulous areas in premolar, cuspid, and incisive areas were treated with fresh-socket implants and immediate preformed anatomical healing caps. Each final crown restoration was fabricated 3 months later. Primary outcomes (related to loss of the alveolar width and peri‑implant bone level) and secondary outcomes (testing adverse events, and measuring implant/prosthesis survival) were acquired and analyzed.
A two-year retrospective analysis was conducted on 31 patients (19 female and 12 male), who underwent dental implant placement with implants having two different lengths of the collar: group A, 0.8 mm, and group B, 2.0 mm. As for the width of the alveolar crest, there was a negligible loss (less than half a millimeter) reported for both the groups, anyway reaching a statistical significance. Preoperative alveolar widths (9.50±0.67 mm and 9.45±0.90 mm, respectively for groups A and B) were different from the two-year alveolar widths (9.20±0.74 mm and 8.93±0.99 mm, respectively for groups A and B) with p-values ≤ 0.0049. When the marginal bone loss was assessed, significant differences were registered between the two procedure groups (-1.42±0.34 mm for group A and -0.11±0.15 mm for group B with a p-value < 0.0001).
The proper design of a healing abutment was very important to preserve the emergence profile immediately after extraction and implant placement. The length of the implant collar used with an immediate healing abutment appeared to affect the preservation of the alveolar crest with predictable final results.
本临床和放射学回顾性研究的目的是评估即刻植入定位（使用两种不同颈长，0.8mm 和 2.0mm）和预制愈合帽负载后两年的牙槽骨改建情况，包括牙槽宽度和种植体周围骨水平。零假设，H0 为：两组种植体之间没有差异。
在磨牙、尖牙和切牙区单个牙缺失的患者中，采用新鲜牙槽窝植入物和即刻预制解剖愈合帽进行治疗。每 3 个月后制作最终的皇冠修复体。获得并分析主要结局（与牙槽宽度和种植体周围骨水平的丧失有关）和次要结局（测试不良事件和测量种植体/修复体的存活率）。
对 31 名患者（19 名女性和 12 名男性）进行了为期两年的回顾性分析，这些患者接受了具有两种不同颈长的种植体植入：A 组为 0.8mm，B 组为 2.0mm。对于牙槽嵴的宽度，两组报告的损失都可以忽略不计（不到半毫米），但仍具有统计学意义。术前牙槽宽度（分别为 A 组 9.50±0.67mm 和 B 组 9.45±0.90mm）与两年后的牙槽宽度（分别为 A 组 9.20±0.74mm 和 B 组 8.93±0.99mm）不同，p 值均≤0.0049。当评估边缘骨丢失时，两组之间有显著差异（A 组为-1.42±0.34mm，B 组为-0.11±0.15mm，p 值<0.0001）。
适当设计愈合基台对于在拔牙和植入后立即保留种植体的外观轮廓非常重要。与即刻愈合基台一起使用的种植体颈长似乎会影响牙槽嵴的保存，最终结果可预测。
