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modalities available for sterilizationthe most accepted methods of sterilization can be classified as followsphysical agents these comprise
packaging for instruments and cassettes packaging used for instruments and cassettes prior to sterilization includes wrap paper pouches plastic
instrument examination and carecleaning instruments provides a good opportunity to examine replace or remove damaged instruments lubricate items such
q classifications of mechanical cleaning devicesin general three classifications of mechanical cleaning devices are available for the dental
q mechanical means of instrument cleaningusing mechanical means of instrument cleaning rather than hand scrubbing should minimize handling of
define osseointegration and its theoriesosseointegration implies that it is a contact established without interposition of non bony tissue between
relate the oxide layer and biocompatibility of titaniumthe compatibility of a metal with its host environment depends on its resistance to
enumerate different implant materials with their pros and consbiomaterials fall into four categories metal and metal alloys ceramics carbon included
list the requirements of implant materialsa biologically compatibility an ideal implant material will elicit mainly physiological reactions within
classify biomaterials and list some examplesbiologic classification is based on tissue response and systemic toxicity effects of the implant and is
define biomaterial and an implant and state their role in generalbiomaterial a pharmacologically inert material that is capable of interacting with
hydroxyapatite coatinghydroxyapatite coating has been recommended for clinical use these implants are superior with respect to the degree and rate of
what is metallic implantsmetallic implants undergo one or more several surface modifications to enable them to become suitable for implantation these
determine the biologic responsethe biologic response can includei metabolic disturbanceii inflammatory responseiii immune responseiv mutagenesisv
relation between tissue and the implant materialthe biologic interaction between the tissue and the implant material at an interface may result
what is machined implant machined implant has irregular surface roughness from approximately 10mum grooves and ridges in the machining direction the
implant surface affect osseointegrationsurface topography is critical as rough surfaces produce better bone fixation as compared with smooth surfaces
occlusal load affect osseointegrationthe timing and amount of overload are critical for osseointegration occlusal loading early where the primary
how bone density affect osseointegrationthe most important bone property is density which is influenced by factors such as patient age and genetics
how surgical technique affect osseointegrationthe osteotomy preparation is critical both from biologic and biomechanical points of view the bone
determine the biocompatibility of the material it is a vital factor as we have discussed in detail in the preceeding part of this unit the nature of
factors affecting osseointegrationa biocompatibility of the materialb surgical technique-c bone density -d occlusal loade infectionf implant
stages of contact osteogenesisosteoconduction this is the first and the most important healing phase and relies on the recruitment and migration of
contact osteogenesis in this the osteogenic cells attach to the implant surface and the new de novo bone is formed on the implant surface first the
explain the distant osteogenesisin this an extracellular matrix establishes the implant surface contact the osteogenic cells line the host bone