A prospective 15‐year follow‐up study of mandibular fixed prostheses supported by osseointegrated implants. Clinical results and marginal bone loss.

Abstract

In this prospective study 47 edentulous patients were treated with mandibular fixed prostheses supported by osseointegrated Brånemark implants and followed for 12 to 15 years. Three (1%) of the 273 inserted implants were lost, two before and one six years after placement of the fixed prosthesis. The cumulative success rate (CSR) of the implants was 98.9% both after 10 and 15 years. None of the fixed prostheses was lost and at the last follow-up, all patients had stable fixed prostheses in function (CSR 100%). The marginal bone loss around the implants was small, on average 0.5 mm during the first post surgical year and thereafter about 0.05 mm annually. More bone was lost around the anterior implants than around the most posterior ones. Smoking and poor oral hygiene had significant influence on bone loss, while occlusal loading factors such as maximal bite force, tooth clenching and length of cantilevers were of minor importance. It is concluded that the long-term results of the mandibular implant treatment were extremely successful, regarding both the fixed prostheses and implant stability. Bone resorption around the implants, albeit limited, was influenced by several factors, smoking and oral hygiene appeared to be most important.

How do peri‐implant biologic parameters correspond with implant survival and peri‐implantitis? A critical review

“…In fully edentulous jaws, a 97% implant survival after on average 14 years has been reported (Vandeweghe, Ferreira, Vermeersch, Marien & De Bruyn, 2016). Up to 20 years, implant survival rates in the range of 80%–95% have been reported with turned implants in fully edentulous jaws (Astrand, Ahlqvist, Gunne & Nilson, 2008; Attard & Zarb, 2004; Ekelund, Lindquist, Carlsson & Jemt, 2003; Lindquist, Carlsson & Jemt, 1996). Chappuis et al.…”

X-ray evaluation at 5–6 years of Straumann implants (part 2)

“…Furthermore, correlations between clinical probing and histological levels were also evaluated by an experimental study in the dog [40]. Hence, both radiographic interpretations of changes over time and measurements of attachment level changes are reliable in assessing the treatment outcome of inter-proximal intra-bony defects [24].…”

“…Different values presented in the different studies were related to the variability in analysis methods and data selection. For instance, the Brånemark group excluded bone loss occurring during the first year; their results were expressed as mean values, and concerned a population with large interindividual deviation [24]. For Adell et al, the reported bone loss was 0.1 mm with high standard deviations [4].…”

“…Increased mean CBL was observed when <1 mm VBL remained. showed statistically significant results when investigating their influence on peri-implant bone change (p < 0.05) (Tables [14][15][16][17][18][19][20][21][22][23][24][25]. These factors were: Independent variables: surface texture, tobacco, arch location, and vestibular bone width on bone loss.…”

Distribuição de tensões geradas por próteses esplintadas ou individualizadas sobre implantes com reabilitações em diferentes rebordos. Análise pelo método dos elementos finitos

“…Quanto maior a altura da coroa, maior será o momento de força ou braço de alavanca frente a qualquer força obliqua, segundo Misch, 1999e Bidez e Misch, 2008. A cada aumento de 1 mm na altura da coroa há acréscimo de 20% nas forças atuantes (Bidez e Misch, 1992 Celletti et al,1995;Lindquist et al, 1996;Wennstrom et al, 2004;Blanes et al, 2007. Estes fatores caracterizam-se como limitações do estudo (material isotrópico, linearmente elástico e homogêneo).…”