Conflict Of Interest: self-supported study, no conflict of interest to declare
Aims: This 2-year prospective multi-centre study aimed to evaluate the survival of implants loaded 14 weeks after vertical ridge augmentation (VRA).
Materials And Methods: Twenty consecutive patients scheduled for VRA around implants were selected for this study in three private centres. Nano-structured Mg-enriched hydroxyapatite (Mg-e HAP) was used as the only augmentation filler material. It was covered with a titanium reinforced extended polytetrafluoroethylene (e-PTFE) membrane (Gore-Tex). A total of 42 rough-surface implants were inserted in the same surgical session. Healing abutments 2 mm long were used instead of cover screws to optimise aesthetics. All patients underwent a second surgery after 3 months. Thereafter, definitive restorations were seated within 2 weeks using a platform-switching concept. Outcome measures were amount of vertical bone gain, prosthesis and implant success, complications and radiographic marginal bone level changes assessed at 12 and 24 months of prosthetic loading. Frequency resonance analysis expressed using ISQ (implant stability quotient) values was performed at implant insertion (T0), when definitive restoration was seated (T1) and after 24 months of prosthetic loading (T2).
Results: At the end of the study, no patient dropped out, all implants were clinically stable and no prosthesis failed. Initial clinical evaluations showed an average defect height of 4.1 mm. Only one late membrane exposure was registered. Complete bone filling of the regeneration volume was obtained in 19 out of 20 cases. The mean bone height gain was 5.6 mm. Radiographic assessments of inter-implant regenerated bone levels after 24 months of loading presented a mean value of 1.0 mm (SD 0.48 mm), stable compared to the same analysis at the 12-month follow-up. A statistically significant loss of peri-implant bone level occurred over time. Mean peri-implant bone levels were 0.3 mm at the time of prosthetic loading, 0.90 mm after 1 year and 0.98 after 2 years. ISQ values statistically significantly increased over time. At implant placement the mean ISQ value was 49.3, at delivery of the final restoration it was 63.9 and after 2 years of loading it was 73.6.
Conclusion: This clinical study suggests that VRA around rough-surface implants using e-PTFE membrane and nano-structured Mg-e HAP can be successful even in cases with early loading.
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Materials (Basel)
January 2025
Comprehensive Dentistry for Adults and Gerodontology, Faculty of Dentistry, University of Seville, 41009 Seville, Spain.
Sandblasting and acid etching are common procedures used to treat implant surfaces, enhancing osseointegration and improving clinical success rates. This clinical study aimed to evaluate the long-term outcomes of sandblasted and acid-etched implants. A total of 303 implants were placed in 114 partially and totally edentulous patients using a two-stage surgical technique and an early loading protocol (6-8 weeks).
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Department of Orthopedic Surgery, Yamaguchi University Graduate School of Medicine, Ube, JPN.
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Department of Prosthodontics, RAK College of Dental Sciences, RAK Medical and Health Sciences University, Ras Al Khaimah, United Arab Emirates. Electronic address:
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J Oral Implantol
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Department of Orthodontics and Pedodontics, Faculty of Dentistry, Van Lang University, Ho Chi Minh City, Vietnam.
The reverse scan technique offers several advantages, such as improvements of accuracy and visibility of critical anatomical structures, minimizing chair time, and providing better patient comfort. This was a case report successfully employing the reverse scan technique. A 72-year-old male patient desired to restore his teeth in both jaws, as he experienced difficulty eating and had never worn dentures.
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