Section of Oral and Maxillofacial Surgery, Division of Diagnostic and Surgical Sciences, UCLA School of Dentistry, Los Angeles, California, USA.
Preclinical & Translational Research, Institut Straumann AG, Basel, Switzerland.
Clin Oral Implants Res. 2022 May;33(5):501-510. doi: 10.1111/clr.13910. Epub 2022 Mar 6.
Immediate implant placement and loading is a practice that continues to gain traction in implant dentistry because it reduces treatment time and improves satisfaction. Novel implant designs that facilitate increased primary stability, while not compromising osseointegration and long-term survival are important to offer immediate solutions for missing teeth. Here, we hypothesize that fully tapered implants can obtain successful osseointegration with high survival rates after immediate loading in fresh extraction sockets and healed sites.
A total of 13 swine with 73 implants were evaluated. Fully tapered or apically tapered implants were placed in extraction sockets and healed sites. Insertion torque and resonance frequency analysis were determined at placement and euthanasia. Animals were evaluated at: placement, and 1-week and 12-weeks after placement. Bone to Implant Contact (BIC), Bone Area/Total Area (BA/TA), and first BIC (fBIC) analyses were conducted.
The fully tapered implant achieved similar primary stability with lower insertion torque at placement. Apically and fully tapered implants had comparable BIC (50.1% vs 59.4%) and ISQ (82.5 vs 80.3) values by 12 weeks in healed sites. In extraction sockets, BIC and ISQ for the apically tapered implant was 35.8% and 73.2 and 37.8% and 79.2 for the fully tapered implants, respectively.
In this short-term study, immediately loaded fully tapered implants obtained high survival with similar osseointegration ability as apically tapered implants when placed in healed sites and fresh extraction sockets. Fully tapered implants show promise for use in immediate loading and immediate placement.
即刻种植和即刻负重是一种在种植牙科中越来越受欢迎的治疗方法，因为它可以减少治疗时间并提高患者满意度。新型种植体设计可以提高初期稳定性，同时不影响骨整合和长期存活率，为缺失牙齿提供即刻解决方案非常重要。在这里，我们假设在新鲜拔牙窝和愈合部位，全锥度种植体在即刻负重后可以获得成功的骨整合和高存活率。
共评估了 13 只猪的 73 个种植体。全锥度或根尖锥度种植体被放置在拔牙窝和愈合部位。在放置和安乐死时测定插入扭矩和共振频率分析。动物在放置时、放置后 1 周和 12 周进行评估。进行骨与种植体接触（BIC）、骨面积/总面积（BA/TA）和首次 BIC（fBIC）分析。
全锥度种植体在放置时具有相似的初期稳定性，插入扭矩较低。在愈合部位，根尖和全锥度种植体在 12 周时具有相似的 BIC（50.1%对 59.4%）和 ISQ（82.5 对 80.3）值。在拔牙窝中，根尖锥度种植体的 BIC 和 ISQ 分别为 35.8%和 73.2%，全锥度种植体分别为 37.8%和 79.2%。
在这项短期研究中，即刻负重的全锥度种植体在愈合部位和新鲜拔牙窝中植入时具有较高的存活率，并且具有与根尖锥度种植体相似的骨整合能力。全锥度种植体在即刻负重和即刻种植方面有应用前景。
