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Volume 32 , Issue 1
January/February 2017

Pages 114–120


Radiographic Evaluation of Crestal Bone Level in Split-Crest and Immediate Implant Placement: Minimum 5-Year Follow-up

Giovanni B. Bruschi, MD, DDS/Paolo Capparé, MD, MFS/Fabrizio Bravi, DDS/Nicola Grande, DDS/Enrico Gherlone, MD, DMD/Giorgio Gastaldi, MD, DMD/Roberto Crespi, MD, MS


PMID: 28095517
DOI: 10.11607/jomi.4203

Purpose: This study aimed to evaluate the radiographic bone level changes of implants positioned via the split-crest procedure both in the maxilla and mandible at a long-term follow-up. Materials and Methods: Seventy-one patients were retrospectively enrolled in the study. The placement of 137 dental implants was performed in the edentulous premolar or molar region after a split-crest ridge expansion procedure. Implants followed a delayed loading protocol. Intraoral digital radiographs were performed at baseline, upon implant placement, at 70 days (following placement of the provisional prosthesis), and on a yearly basis during followup. Crestal bone levels were evaluated at the baseline, upon provisional prosthesis placement, at 12, 36, and 60 months, and at the long-term follow-up of healing from implant placement. Results: The patients underwent a mean follow-up of 6.54 ± 1.32 years, from which the implant survival rate was reported at 98.54%. Within the first year from implant placement, a bone loss resulted at a mean value of –1.11 ± 0.44 mm. After almost 3 years from implant placement, a mean bone gain of +0.89 ± 0.39 mm was reported, which was statistically significant compared with 12-month values (P < .05). From this point, bone levels remained stable, reporting similar values over time, with no significant differences (P > .05). Conclusion: A mean vertical bone gain of +0.89 ± 0.39 mm was observed after almost 36 months after implant positioning.


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