Objective: To evaluate the accuracy and clinical effect of immediate implant placement(IIP) using real-time dynamic navigation in the posterior maxilla with alveolar bone defects.

Methods: A total of 55 patients with 72 implants placed in the posterior maxillary region with alveolar bone defects were retrospectively analyzed between January 1, 2021, and October 31, 2024. The study was divided into two groups, navigation group and freehand implant group.The preoperative planning implant data and postoperative CBCT data of the actual implant were imported into the dynamic navigation accuracy verification software, and the deviations of the actual implant neck, root, depth and angle were calculated and reported. Clinical indicators including implant deviation, initial stability, implant success were recorded.

Results: There were 38 implants in the navigation group and 34 in the freehand group. All implants were successfully placed without serious complications such as perforation of the maxillary sinus mucosa. The initial stability of the implant in the navigation group was (28.53 ± 5.81)N.cm and (18.47 ± 3.64)N.cm, respectively. The initial stability of the implant in the navigation group was higher than that in the free hand group (P < 0.05). The deviations in the cervical, root, depth, and angulation of the navigation group were all significantly smaller than those of the free-hand implant group, with statistically significant differences (P < 0.05). The median follow-up was 29.6 ± 11.2 months and the implant success rate was 100%.

Conclusions: Immediate implant placement in the maxillary posterior region with bone deficiency assisted by real-time dynamic navigation can achieve good implant accuracy and satisfactory clinical results.

Clinical relevance: Dynamic navigation is an advantage for the IIP of an alveolar bone defect in the posterior region of the maxilla.

Keywords: Alveolar bone defect; Dynamic navigation system; Immediate implant placement; Posterior maxillary region; Precision.

© 2025. The Author(s).

目标: 评估在后上颌骨缺损区使用实时动态导航进行即刻种植的准确性和临床效果。

方法: 回顾性分析2021年1月1日至2024年10月31日期间，55名患者在后上颌骨缺损区植入72颗种植体的情况。研究分为导航组和自由手操作组两组。将术前规划的种植数据与术后CBCT（锥形束计算机断层扫描）的实际种植体数据导入动态导航精度验证软件中，并计算实际种植体颈部、根部、深度及角度偏差并报告。记录临床指标，包括植入偏差、初始稳定性、种植成功等。

结果: 导航组有38颗种植体，自由手操作组有34颗种植体。所有种植体均顺利放置，未出现上颌窦黏膜穿孔等严重并发症。导航组的初始稳定性分别为（28.53 ± 5.81）N.cm 和 （18.47 ± 3.64）N.cm，显著高于自由手操作组 (P

结论: 在后上颌骨缺损区使用实时动态导航辅助即刻种植能够达到良好的种植精度和满意的临床效果。

临床意义: 动态导航对于后上颌区域的牙槽骨缺陷处即刻种植具有优势。