Zamparini Fausto, Pirani Chiara, Chavarria-Bolanos Daniel, Gandolfi Maria Giovanna, Prati Carlo
Unit of Clinical Endodontic, School of Dentistry, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy.
Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy.
Minerva Stomatol. 2019 Oct;68(5):249-258. doi: 10.23736/S0026-4970.19.04259-6.
This study aims to evaluate soft and hard tissues response of a two-piece implant placed nonsubmerged in elderly patients' anterior maxilla. Marginal bone level and Pink Esthetic Score (PES) were evaluated up to 24 months.
Twelve healthy consecutive patients (mean age 65.8±5 years; 65.5 median) were included in the study. Implants were inserted with flapless technique after 3 months or immediately after extraction. The smooth machined neck of the implant was characterized by a hyperbolic neck which follows biologically oriented preparation technique (BOPT) principles. A customized abutment and a provisional resin crown was positioned with care to avoid excessive soft tissue compression after 3 months, according with BOPT technique. A definitive ceramic crown was positioned after approx. 4 months.
After 24 months all implants were stable and osseointegrated. PES improved at 6 and 12 months recalls, remaining stable at 24 months, indicating a healthy soft and hard tissue response. No complications were observed. Impression procedures and provisional/definitive crown cementation resulted simple and free from complications. The hyperbolic profile allowed the preparation of prosthetic crown free from any gingival tissue pressure to create the adequate soft tissue contour.
The use of hyperbolic profile implant associated with the transmucosal (not-submerged) technique is a safe procedure that allow the preservation of soft and hard tissue also in elderly patients.
本研究旨在评估非潜入式两段式种植体植入老年患者上颌前部软硬组织的反应。对边缘骨水平和粉色美学评分（PES）进行长达24个月的评估。
连续纳入12例健康患者（平均年龄65.8±5岁；中位数65.5岁）。种植体在拔牙后3个月或拔牙后立即采用不翻瓣技术植入。种植体的光滑加工颈部具有双曲线形颈部，遵循生物导向制备技术（BOPT）原则。根据BOPT技术，3个月后小心放置定制基台和临时树脂冠，以避免软组织过度受压。约4个月后放置最终的陶瓷冠。
24个月后，所有种植体均稳定且骨结合良好。PES在6个月和12个月复诊时有所改善，在24个月时保持稳定，表明软硬组织反应健康。未观察到并发症。取模过程以及临时/最终冠的粘结操作简单且无并发症。双曲线形外形使得制作的修复冠不会对牙龈组织产生任何压力，从而形成适当的软组织轮廓。
双曲线形种植体与经黏膜（非潜入式）技术联合使用是一种安全的方法，即使在老年患者中也能保留软硬组织。
