Abstract
Summary Although the available literature with its large variation in quality and criteria does not easily allow one to draw many firm conclusions, some common findings can be traced. The use of autogenous onlay blocks placed together with self-tapping implants can achieve an excellent long-term success rate of individual implants. Autogenous bone chips can be used to deal with fenestration and dehiscence defects when used in combination with e-PTFE membranes. (D)FDBA has been used as particulate material and in conjunction with barrier membranes. Although these allografts do not compare favorably with autogenous bone chips, their role as space maintainers under barrier membranes cannot be ignored. Demineralized bovine bone offers excellent osseoconductive properties. It can secure a predictable fill of intrabony defects on its own, whereas for bone augmentation in dehiscence and fenestration defects it should be used in combination with a membrane. Its slow resorption makes it more favorable for use with rather than before implant placement. Thus far the e-PTFE membranes, GTAM and TR-GTAM, are best documented. They offer reliable results, except for vertical augmentation procedures, in which exposure is regularly encountered (approximately 15%). The use of a collagen membrane when supported by a bone substitute to maintain the space gives good results, although the clinical data are still limited. The clinician should evaluate the eventual benefit of GBA, namely to be able to harbor longer implants with a better prognosis, versus the drawbacks and risks involved with the use of either bone substitutes or membranes.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call