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Marginal bone change and implant survival following vertical guided bone regeneration, A retrospective analysis

Joseph Kan, DDS, MS

Sunee Limmeechokchai, DDS – Resident, Loma Linda Univeristy

Sasiya Bhumpattarachai, DDS – Resident, Loma Linda Univeristy

Kenzo Shiozaki, DDS – Resident, Loma Linda Univeristy

Samuel Sauza, DDS – Resident, Loma linda university

Kittichai Rungcharassaeng, DDS, MS

Jaime Lozada, DMD – Professor and Director, Loma Linda Implant department


Purpose of the Study: The purpose of this retrospective study is to investigate and assess marginal bone loss and survival rate of implants placed following vertical bone augmentation.

Methods: This study will be conducted in the Center for Implant Dentistry, Loma Linda University, California, United States. The treatment records, periapical radiographs, panoramic radiographs, and/or cone beam computed tomography (CBCT) of patients who received implants following vertical bone augmentation between 2007-2019 will be retrospectively reviewed and selected. Total 200 implants will be reviewed by four calibrated examiners and following parameters will be collected: 1) Patient demography (age and gender) 2) Patient with the history of diabetes and smoking 3) Date of vertical guided bone regeneration surgery 4) Type of bone graft 5) Type of barrier membrane 6) Name of a surgeon who performed guided bone regeneration surgery and implant placement 7) Complication after guided bone regeneration surgery and implant placement 8) Implant placement date 9) Implant site, system, diameter, length 10) Time of final prosthetic loading 11) Type of final prosthesis 12) Type of opposing dentition 13) Number of implant removal 14) Percentage of marginal bone loss Data collection: The measurements of marginal bone level will be digitally performed. The remodeling of the crestal bone will be monitored using calibrated periapical radiographs, panoramic radiographs and/or cone beam computed tomography (CBCT) taken immediately after implant placement compare to the latest follow up radiographs. Bone change is the distance between the implant platform and first bone-to-implant contact . Marginal bone loss will be calculated in percentage. The analysis of implants survival rate associated with each recorded parameter will be performed by descriptive analysis

Results: Results will be presented on e-poster.

Conclusion: Conclusion will be presented on e-poster

Articles: 1. Rocchietta I, Fontana F, Simion M. Clinical outcomes of vertical bone augmentation to enable dental implant placement: a systematic review. J Clin Periodontol 2008 Sep;35(8 Suppl):203-15. 2. Mecall RA, Rosenfeld AL. Influence of residual ridge resorption patterns on implant fixture placement and tooth position. 1. Int J Periodontics Restorative Dent 1991;11(1):8-23. 3. Buser D, Ingimarsson S, Dula K, Lussi A, Hirt HP, Belser UC. Long-term stability of osseointegrated implants in augmented bone: a 5-year prospective study in partially edentulous patients. Int J Periodont Restor Dent 2002;22(2):109–17. 4. Chiapasco M, Zaniboni M, Boisco M. Aug- mentation procedures for the rehabilitation of deficient edentulous ridges with oral implants. Clin Oral Implants Res 2006;17(Suppl 2):136–59. 5. Urban IA, Jovanovic SA, Lozada JL. Vertical ridge augmentation using guided bone regeneration (GBR) in three clinical scenarios prior to implant placement: a retrospective study of 35 patients 12 to 72 months after loading. Int J Oral Maxillofac Implants 2009 May-Jun;24(3):502-10. 6. Urban IA, Lozada JL, Jovanovic SA, Nagursky H, 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. Int J Oral Maxillofac Implants 2014 Jan-Feb;29(1):185-93. 7. Donos N, Mardas N, Chadha V. Clinical outcomes of implants following lateral bone augmentation: systematic assessment of available options (barrier membranes, bone grafts, split osteotomy). J Clin Periodontol 2008;35(8 (Suppl)):173–202. 8. Clementini M, Morlupi A, Canullo L, Agrestini C, Barlattani A. Success rate of dental implants inserted in horizontal and vertical guided bone regenerated areas: a systematic review. Int J Oral Maxillofac Surg 2012 Jul;41(7):847-52. 9. Aghaloo TL, Moy PK. Which hard tissue augmentation techniques are the most successful in furnishing bony support for implant placement?. Int J Oral Maxillofac Implants 2007;22 Suppl:49-70. 10. Tonetti MS, Hämmerle CH. Advances in bone augmentation to enable dental implant placement: Consensus Report of the Sixth European Workshop on Periodontology. J Clin Periodontol 2008 Sep;35(8 Suppl):168-72.

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