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Published on: October 18, 2021
Tenting Screw Technique for Horizontal Alveolar Bone Augmentation in the Anterior Maxilla: A 1- to 5-Year
Siyuan Wang1,2, Xiaoyu Chen1, Weijie Wu1
1Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Clinical Research Center for Oral Disease of Zhejiang Province, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China.
Objectives:
To evaluate the 1- to 5-year outcomes of dental implants placed with the tenting screw (TS) technique and to compare their clinical efficacy with conventional guided bone regeneration (GBR).
Methods:
This retrospective study involved implants placed with TS or conventional GBR technique. Horizontal and volumetric bone gains were evaluated by reconstructing cone-beam computed tomography (CBCT) data. Complications, biological parameters, esthetic scores, and patients' satisfaction were recorded.
Results:
A total of 75 implants in 42 patients (20 defect sites in TS group and 22 in GBR group) were included in this study. With a 1- to 5-year follow-up, no implants failed, resulting in a 100% implant survival rate. After healing periods, the TS group demonstrated horizontal bone gains of 2.85 ± 1.42 mm, 3.37 ± 1.79 mm, and 3.27 ± 1.68 mm at 1, 3, and 5 mm below the implant shoulder, significantly exceeding the GBR group (p = 0.009, p = 0.002, p = 0.002, respectively). Consistently, three-dimensional volumetric bone resorption rates for the TS and GBR groups after healing periods were 16.5% and 29.3% (p < 0.001), increasing to 36.7% and 50.7% after follow-up periods (p < 0.001). The overall PPDs in the TS group were significantly smaller than those in the GBR group (2.50 (2.25, 2.50) mm vs. 2.50 (2.25, 2.75) mm, p = 0.038). No other significant differences were observed in terms of peri-implant soft tissue health, esthetics, and patients' satisfaction.
Conclusions:
Considering the superior bone augmentation outcomes and comparable peri-implant soft tissue health, esthetics, and patient satisfaction to the conventional GBR technique, the tenting screw technique emerges as a reliable treatment option for reconstructing atrophic alveolar ridges in the anterior maxilla.
