Department of Periodontology, Dental Hospital, Veterans Health Service Medical Center1
Purpose: This study reports four cases of vertical ridge augmentation using titanium reinforced Polytetrafluoroethylene (TR-PTFE) membranes.Material and Methods: Bone augmentation was performed using TR-PTFE membranes in four patients with a vertical bony defect (mean 6.5 ± 0.58 mm) who was scheduled to receive dental implants at the Department of Periodontology, Veterans Health Service Medical Center between January and December 2016. Vertical bony defects were measured intraoperatively using a probe and the exposure of membranes were assessed before and after suture removal and one month after the surgery. The gained area from the reoperation as well as the need for additional bone grafting during implant placement was assessed.Results: The exposure was maintained without inflammation in one site. Placing an implant led to an average of 5.25 ± 0.5 mm vertical augmentation, and none of the cases required additional bone transplantation. A total of ten implants were installed in 4 cases. Over at least 1-year of follow-up, all implants were functioned well.Conclusion: In this case study, bone augmentation using TR-PTFE membranes. led to satisfactory bone regeneration in defective areas with vertical bone resorption. In addition to a greater number of cases, histological assessments should be performed in the future to further substantiate these findings.
1. Simion M, Trisi P, Piattelli A. Vertical ridge augmentation using a membrane technique associated
with osseointegrated implants. International Journal of Periodontics & Restorative Dentistry. 1994;
2. Tinti C, Parma-Benfenati S, Polizzi G. Vertical ridge augmentation: what is the limit? International Journal of Periodontics & Restorative Dentistry. 1996; 16: 220-229.
3. Parma-Benfenati S, Tinti C, Albrektsson T, Johansson C. Histologic evaluation of guided vertical ridge augmentation around implants in humans. International Journal of Periodontics & Restorative Dentistry. 1999; 19: 424-437.
4. Karring T, Nyman S, Gottlow J, Laurell L. Development of the biological concept of guided tissue regeneration-animal and human studies. Periodontology. 2000 1993; 1: 26-35.
5. Hämmerle CH, Jung RE. Bone augmentation by means of barrier membranes. Periodontology. 2000 2003; 33: 36-53.
6. Ghensi P, Stablum W, Bettio E, Soldini M, Tripi T, Soldini C. Management of the exposure of a dense PTFE (d-PTFE) membrane in guided bone regeneration (GBR): a case report. ORAL & implantology. 2017; 10: 335.
7. Istvan A, Monje A, Wang DH-L. Vertical ridge augmentation and soft tissue reconstruction of the anterior atrophic maxillae: a case series. Int J Periodontics Restorative Dent. 2015; 35: 613-623.
8. Istvan A, Monje A, Wang DH-L. Vertical ridge augmentation and soft tissue reconstruction of the anterior atrophic maxillae: a case series. Int J Periodontics Restorative Dent. 2015; 35: 613-623.
9. Fontana F, Battista Grossi G, Fimanò M, Maiorana C. Osseointegrated implants in vertical ridge augmentation with a nonresorbable membrane: a retrospective study of 75 implants with 1 to 6 years of follow-up. International Journal of Periodontics & Restorative Dentistry. 2015; 35: 29-39.
10. Becker W, Dahlin C, Becker BE, Lekholm U, Van Steenberghe D, Higuchi K, et al. The use of e-PTFE barrier membranes for bone promotion around titanium implants placed into extraction sockets: a prospective multicenter study. International Journal of Oral & Maxillofacial Implants. 1994; 9: 31-40.
11. Urban IA, Lozada JL, Jovanovic SA, Nagursky H, Nagy K. Vertical ridge augmentation with titanium- reinforced, dense-PTFE membranes and a combination of particulated autogenous bone and anorganic bovine bone-derived mineral: a prospective case series in 19 patients. International Journal of Oral & Maxillofacial Implants. 2014; 29: 185-193.
12. Barber HD, Lignelli J, Smith BM, Bartee BK. Using a dense PTFE membrane without primary closure to achieve bone and tissue regeneration. Journal of Oral and Maxillofacial Surgery. 2007; 65: 748-752.
13. Ronda M, Rebaudi A, Torelli L, Stacchi C. Expanded vs. dense polytetrafluoroethylene membranes in vertical ridge augmentation around dental implants: a prospective randomized controlled clinical trial. Clinical oral implants research. 2014; 25: 859-866.
14. Huang L-T, Hsu P-S, Kuo C-Y, Chen S-C, Lai J-Y. Pore size control of PTFE membranes by stretch operation with asymmetric heating system. Desalination. 2008; 233: 64-72.
15. Liu J, Kerns DG. Suppl 1: Mechanisms of Guided Bone Regeneration: A Review. The open dentistry journal. 2014; 8: 56-65.
16. Simion M, Baldoni M, Rassi P, Zaffe D. A comparative study of the effectiveness of e-PTFE membranes with and without early exposure during the healing period. Int J Periodontics Restorative Dent 1994; 14: 166-180.