Quintas-Hijós Jacobo, Pérez-Pevida Esteban
Department of Surgery, Faculty of Medicine, University of Salamanca, Salamanca, Spain.
Department of Surgery, Faculty of Sports and Health Sciences, University of Zaragoza, Huesca, Spain.
Clin Oral Investig. 2025 May 8;29(6):291. doi: 10.1007/s00784-025-06364-8.
To determine the most effective combination of abutment height and timing of placement in reducing marginal bone loss (MBL).
54 patients received at least one single screw-retained crown on an implant replacing a posterior tooth (60 implants). Implants were divided into six groups based on intermediate abutment height (1.5 mm, 2 mm, 3 mm) and timing of placement (immediate: surgery 1; delayed: surgery 2): Group A3I (height 3, surgery 1), Group A2I (height 2, surgery 1), Group A15I (height 1.5, surgery 1), Group A3D (height 3, surgery 2), Group A2D (height 2, surgery 2), Group A15D (height 1.5, surgery 2). Mesial and distal linear radiographic measurements were taken at five follow-up points: implant surgery, crown placement (T1), and 3 (T2), 6 (T3), and 12 months after loading (T4). Partial and total MBL were compared between groups.
After 12 months, the lowest MBL was found in groups A3I (0.13 ± 0.11 mm) and A2I (0.24 ± 0.11 mm), with no statistical difference between them. Groups A15I (0.70 ± 0.12 mm), A3D (0.66 ± 0.11 mm), A2D (0.62 ± 0.12 mm), and A15D (0.78 ± 0.11 mm) showed significantly higher MBL than groups 1 and 2, with no statistical difference among them.
Immediate abutments of 2-3 mm resulted in lower MBL compared to 1.5 mm immediate abutments or any delayed abutments.
This study provides data on the optimal combination of intermediate abutment height and placement timing in preventing MBL.
Clinical trial registration number: NCT06667531. link: https://clinicaltrials.gov/study/NCT06667531 .
确定基台高度和植入时机的最有效组合，以减少边缘骨丢失（MBL）。
54例患者在用于替换后牙的种植体上接受至少一颗单颗螺丝固位冠（共60颗种植体）。根据中间基台高度（1.5毫米、2毫米、3毫米）和植入时机（即刻：手术1；延迟：手术2）将种植体分为六组：A3I组（高度3，手术1）、A2I组（高度2，手术1）、A15I组（高度1.5，手术1）、A3D组（高度3，手术2）、A2D组（高度2，手术2）、A15D组（高度1.5，手术2）。在五个随访点进行近中和远中线性影像学测量：种植手术、冠修复（T1）以及加载后3个月（T2）、6个月（T3）和12个月（T4）。比较各组的部分和总体MBL。
12个月后，A3I组（0.13±0.11毫米）和A2I组（0.24±0.11毫米）的MBL最低，两组之间无统计学差异。A15I组（0.70±0.12毫米）、A3D组（0.66±0.11毫米）、A2D组（0.62±0.12毫米）和A15D组（0.78±0.11毫米）的MBL显著高于第1组和第2组，它们之间无统计学差异。
与1.5毫米即刻基台或任何延迟基台相比，2 - 3毫米的即刻基台导致更低的MBL。
本研究提供了关于中间基台高度和植入时机在预防MBL方面的最佳组合的数据。
临床试验注册号：NCT06667531。链接：https://clinicaltrials.gov/study/NCT06667531 。
