Clinical study of dynamic navigation-assisted immediate implant placement in posterior maxillary alveolar bone defects.

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.