The positive effect of tenting screws for primary horizontal guided bone regeneration: A retrospective study based on cone‐beam computed tomography data

• Published in: Clinical oral implants research Vol. 31; no. 9; pp. 846 - 855
• Main Authors: César Neto, João B., Cavalcanti, Marília C., Sapata, Vitor M., Pannuti, Cláudio M., Hämmerle, Christoph H. F., Naenni, Nadja, Thoma, Daniel S., Romito, Giuseppe A.
• Format: Journal Article
• Language: English
• Published: Denmark Wiley Subscription Services, Inc 01.09.2020
• Subjects: Alveolar Ridge Augmentation; Augmentation; Biomedical materials; Bone growth; Bone Regeneration; Bone Screws; Collagen; Computed tomography; Cone-Beam Computed Tomography; Dental Implantation, Endosseous; Dental implants; Evaluation; Humans; Materials substitution; Regeneration; Regeneration (physiology); Retrospective Studies; Screws; Substitute bone; Surgical implants; cone-beam computed tomography; bone regeneration; alveolar ridge augmentation; dental implants
• ISSN: 0905-7161; 1600-0501; 1600-0501
• DOI: 10.1111/clr.13630

Objectives To radiographically evaluate the effect of the adjunctive use of tenting screws (TS) for primary horizontal guided bone regeneration (GBR). Materials & Methods Twenty‐eight patients in need of staged bone augmentation were consecutively treated in a private practice. A xenogenic particulate bone substitute material (DBBM) and a resorbable collagen membrane were used in all patients. Subjects were divided into two groups: control (conventional GBR; n = 22) and test (tenting screws in conjunction with GBR ‐ TS; n = 22). CBCT images were obtained before augmentation and after 6–8 months. CBCTs were superimposed, and linear horizontal measurements were performed. Alveolar ridge width (RW) and ridge width change (RWchange) were assessed at 1, 3, 5, and 7 mm below the bone crest. Results Forty‐four sites in 28 patients were evaluated. No differences between the groups were detected for RW at baseline (TS: 5.87 ± 2.41; control: 5.36 ± 1.65). Regarding RWchange, TS promoted an additional effect at 1 and 3 mm below the crest compared to control (p < .05; RWchange‐1 TS: 3.72 ± 2.46; control: 1.25 ± 3.05; RWchange‐3 TS: 3.98 ± 2.53; control: 2.50 ± 2.02). The final RW was greater in group TS compared to the control group at the 1, 3, and 5 mm level (p < .05). Conclusions The use of tenting screws exerted a positive effect on staged GBR with a greater final RW at the 3 mm level. In addition, GBR in conjunction with TS was able to provide consistent bone augmentation at lingual/palatal sites.