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“Success depends upon previous preparation, andwithout such preparation there is sure to be failure”Elias M Rivera, DDS , MS, FACPClinical Assistant ProfessorPostgraduate Program Director, Implant Periodontal ProsthodonticsPredoctoral Program Director, Prosthodontics–Confuciuspassword : [email protected]
Elias M Rivera, DDS, MSDiplomate, American Board of ProsthodonticsBiomechanics inImplant DentistryFALL 2019
Relates to long-term success of dental implants and their restorative component .…Overview
Osseointegrated implant provide predictable means ofreplacing missing teethLoad-bearing capacity of implants> anticipated loadsduring functionIf applied loads > load-bearing capacityFailure : Mechanical, BiologicBiomechanical considerations
OsseointegrationOsseointegration is the stableanchorage of an implantachieved by direct bone-to-implant contactBiomechanical considerations
Lack ofosseointegration led toimplant failure
Biomechanical considerationsImplant failureMechanical failure: screwloosening, bend, fracture of theimplantsBiologic failure: resorption-remodeling response of bone aroundimplantsàProgressive bone loss
Implant vs Tooth restorationExcessive forcesPeriodontal ligamentTooth mobilityTeeth are suspended within the supporting alveolarbone by periodontal ligament
Implant vs Tooth restorationExcessive forcesNO Periodontal ligamentDestructive alveolar boneOsseointegrated dental implants : direct contact withalveolar bone
Load Bearing Capacity
PROSTHETIC TOTAL WEIGHTTotal Load IncludesLoad Bearing Capacity of ImplantBONE BEARING CAPACITY
Load Bearing Capacity of ImplantNumber and size of implantAngulations & implant positionQuality of the bone-to-implantinterfacePercentage of bone-to-implantcontactSeveral factors influence load-bearing capacity
Load Bearing Capacity of ImplantPosterior maxilla : less dense trabecular,thin cortical plate layerPoor bone qualityAnterior mandible : dense trabecular,thick cortical plate layerBetterbone qualityBone Density
Bone DensityType I:Homogeneous corticalbone;Type II:Thickcortical bonewith marrowcavity;Type III:Thin corticalbone withdensetrabecularbone of goodstrength;Type IV:very thincortical bonewith lowdensitytrabecularbone of poorstrength.

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Term
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Tags
Force, Dental implant, Implant Dentistry

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