| Seq #121 | Friday, 30 June 2006 | |||||||||||||||||||||||
| 9:00 AM-11:00 AM Brisbane Convention & Exhibition Centre P2, Symposium - Group/Division Sponsored | ||||||||||||||||||||||||
| Imaging Oral Implants | ||||||||||||||||||||||||
Sponsored by: Diagnostic Systems, Implantology Research, Prosthodontics Research | ||||||||||||||||||||||||
| Description: Risk factors for implant failures have been identified and a multilevel, individual risk assessment is suggested for better patient selection. Unfortunately, many questions remain unsolved. These mostly arise from clinical observations, complications and failures and this Symposium seeks to highlight the problems, and invite cross-discipline discussion. In first, diagnosis and prevention of late implant failures are discussed. Among late implant failures, biomechanical factors seem to cause most implant losses. The question remains: Why does the periimplant bone after a long period of function „lose” the capacity to withstand load and maintain osseointegration? The quality of the host bone is definitely an important variable in implant success. The value of clinically available 3-D CT based images for pre-operative implant planning has been documented. With current CT scan technology, predictions of the mechanical properties of trabecular jaw bone based on Hounsfield values are only valid for jaws with a thin layer of cortical bone. For thicker cortical layers, the prediction of the mechanical properties of trabecular bone decreases significantly. Presently, there are few alternative diagnostic tools available for objective assessment of host bone quality. Recent finite-element analysis modelling of implant loading has shown that the physiological limit could be easily exceeded in poor quality bone surrounding the shoulder and apex regions of the loaded implant. A newly-developed diagnostic tool based on active shape modelling may enable clinical detection of low bone mass on panoramic radiographs. This symposium will be concluded by discussing and integrating the research evidence regarding the prediction of implant success during the pre-operative planning of implant placement. Objective and reliable data gathering on bone quality and local jaw bone density seems a prerequisite during any pre-operative implant planning procedure. There is an obvious need for introducing clinically valid tools dealing with this | ||||||||||||||||||||||||
| Chairpersons: H.-G. GRÖNDAHL and R. JACOBS | ||||||||||||||||||||||||
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Back to the IADR General Session & Exhibition (June 28 – July 1, 2006)