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Long‐term results and survival rate of implants treated with guided bone regeneration: a 5‐year case series prospective study
Author(s) -
Blanco Juan,
Alonso Angel,
Sanz Mariano
Publication year - 2005
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/j.1600-0501.2005.01106.x
Subject(s) - medicine , dentistry , implant , osseointegration , survival rate , prospective cohort study , radiography , surgery
One of the key factors for attaining osseointegration is the presence of an adequate osseous volume. In patients with inadequate osseous width or height, a bone augmentation using the guided bone regeneration (GBR) concept may be applied either with a simultaneous or a staged approach. The aim of this multicenter prospective case series study was to evaluate the efficacy and predictability of the GBR technique (simultaneous approach) in patients with peri‐implant osseous defects, both dehiscences and fenestrations. Results 5 years post‐treatment (survival rates and marginal bone level) were assessed. A total of 19 consecutive patients with 26 peri‐implant osseous defects (20 dehiscences and six fenestrations) were treated during the period from September 1992 to June 1993 with a simultaneous GBR approach using non‐resorbable membranes combined with autogenous bone grafts or decalcified freeze‐dried bone allograft. The mean osseous augmentation was 94.8%. Marginal bone levels at re‐entry and 5 years after surgery were calculated from standardized periapical radiographs. One implant was lost 3 months after loading. Thus, the cumulative survival rate was 96.1% after 5 years. The mean marginal bone level after 5 years was 2.03 mm (SD=±0.5), without a difference between mesial and distal sites. This study demonstrates that implants with peri‐implant defects that are treated with GBR had similar survival rates and crestal bone levels compared with implants in native bone.