Peña-Cardelles J-F, Akhondi S, Markovic J, Pala K, Lanis A, Gallucci G-O
Department of Restorative Dentistry and Biomaterials Sciences Harvard School of Dental Medicine 188 Longwood Avenue, Boston, MA, USA
Med Oral Patol Oral Cir Bucal. 2025 Jul 1;30(4):e499-e511. doi: 10.4317/medoral.27042.
Implant-supported single-unit restorations present a predictable and widely used treatment option to replace missing teeth. Narrow-diameter implants provide a viable treatment option for clinical scenarios with limited bone availability, minimizing the need for bone augmentation procedures. This systematic review aims to assess implant survival and implant marginal bone loss among different single-unit narrow implant diameters and between titanium single-unit and titanium-zirconia single-unit narrow implants.
This article was structured according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA®) Included criteria were randomized clinical trials (RCTs) and clinical prospective studies with at least 10 patients, a mean follow-up period of at least 12 months, and assessing single-tooth implants with a diameter of 3.5 mm or less.
Twelve included articles were prospective clinical studies, while 3 articles were randomized controlled clinical studies. There are no significant differences in the comparison between the 2.9-3.0 mm group and the 3.3-3.5 mm group (p=0.933). Both groups had a 99% survival (95% CI, 99.9%-100%). Titanium-zirconia implants presented a mean of marginal bone loss of -0,37 mm (CI, 95%: -0,53 to -0,20) meanwhile, titanium implants had a mean of marginal bone loss of -0,43 mm (CI95%:-0,71 to -0,28).
The findings reveal no significant differences between 2.9-3.3mm and 3.3-3.5mm groups within narrow implants. Both titanium and titanium-zirconia alloys in narrow implants, exhibit comparable high survival rates and minimal marginal bone loss, showcasing their feasibility as a viable treatment alternative in scenarios with limited space or inadequate bone for regular diameter implants.
种植体支持的单颗牙修复是一种可预测且广泛应用的缺牙替代治疗方案。窄直径种植体为骨量有限的临床情况提供了一种可行的治疗选择，最大限度地减少了骨增量手术的需求。本系统评价旨在评估不同单颗窄种植体直径之间以及钛单颗种植体与钛锆单颗种植体之间的种植体存活率和种植体边缘骨丢失情况。
本文按照系统评价和Meta分析的首选报告项目（PRISMA®）进行构建。纳入标准为随机临床试验（RCT）和临床前瞻性研究，患者至少10例，平均随访期至少12个月，并评估直径为3.5毫米或更小的单颗牙种植体。
纳入的12篇文章为前瞻性临床研究，3篇文章为随机对照临床研究。2.9 - 3.0毫米组与3.3 - 3.5毫米组之间的比较无显著差异（p = 0.933）。两组的存活率均为99%（95%CI，99.9% - 100%）。钛锆合金种植体的边缘骨丢失平均值为 -0.37毫米（95%CI： -0.53至 -0.20），而钛种植体的边缘骨丢失平均值为 -0.43毫米（95%CI： -0.71至 -0.28）。
研究结果表明，窄种植体中2.9 - 3.3毫米组和3.3 - 3.5毫米组之间无显著差异。窄种植体中的钛合金和钛锆合金均表现出相当高的存活率和最小的边缘骨丢失，表明它们在空间有限或骨量不足无法使用常规直径种植体的情况下，作为一种可行的治疗选择具有可行性。
