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Short Implants in the Severely Resorbed Maxilla: A 2‐Year Retrospective Clinical Study
Author(s) -
Renouard Franck,
Nisand David
Publication year - 2005
Publication title -
clinical implant dentistry and related research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.338
H-Index - 85
eISSN - 1708-8208
pISSN - 1523-0899
DOI - 10.1111/j.1708-8208.2005.tb00082.x
Subject(s) - maxilla , dentistry , medicine , implant , endosseous implants , resonance frequency analysis , survival rate , retrospective cohort study , radiography , orthodontics , osseointegration , surgery
Background: Although the predictability of endosseous dental implants is well documented, the restoration of the posterior region of the maxilla remains a challenge. The placement of short implants is one therapeutic option that reduces the need for augmentation therapy. Purpose: The purpose of this retrospective study was to assess the survival rates of 6 to 8.5 mm‐long implants in the severely resorbed maxilla following a surgical protocol for optimized initial implant stability. Materials and Methods: The study included 85 patients with 96 short (6–8.5 mm) implants (Brånemark System®, Nobel Biocare AB, Göteborg, Sweden) supporting single‐tooth and partial reconstructions. The implants had a machined (54) or an oxidized (TiUnite™, Nobel Biocare AB) (42) surface. A one‐stage surgical protocol with delayed loading was used. The patients were followed for at least 2 years after loading (average follow‐up period 37.6 months). The marginal bone resorption was assessed by radiographic readings. Results: Five implants were lost during the first 9 months, and four implants were lost to follow‐up. The cumulative survival rate was 94.6%. Four of the failed implants had a machined surface, and one had an oxidized surface. The mean marginal bone resorption after 2 years in function was 0.44 ± 0.52 mm. Conclusion: This study demonstrates that the use of short implants maybe considered for prosthetic rehabilitation of the severely resorbed maxilla as an alternative to more complicated surgical techniques.