Two theories regarding the chemical mechanism by which endosteal implants integrate with bone have been proposed. Osseointegration, as defined above. That type of integration contrasts with fibrosseous integration, in which soft tissues such as fibers and/or cells are interposed between the two surfaces[7] [8].
[edit] Brånemark’s theory of osseointegration
Brånemark proposed that implants integrate such that the bone is laid very close to the implant without any intervening connective tissue. The titanium oxide permanently fuses with the bone, as Brånemark showed in 1950s.
[edit] Weiss’ theory of fibro-osseous integration
Weiss’ theory states that there is a fibro-osseous ligament formed between the implant and the bone and this ligament can be considered as the equivalent of the periodontal ligament found in the gomphosis. He defends the presence of collagen fibres at the bone-implant interface. He interpreted it as the peri-implantal ligament with an osteogenic effect. He advocates the early loading of the implant
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