dental materials

the metal most commonly used in implants is
A. gold
B. stainless steel
C. silver
D. titanium

the type of implant tha tis inserted into ahole drilled into the bone is
A. exosteal
B. endosseous
C. transosteal
D. subperiosteal

with a two stage implant after the fixture is placed which one of the following occurs
A. the fixture is covered with bone
B. the healing abutment is placed and the soft tissue is allowed to heal around it
C. a cover screw is placed and the fixture is covered with soft tissue flap
D. the implant crown is placed

potential adverse outcomes when an implant fixture is surgically placed include
a infection around the implant
b. perforation of one of the cortical plates of bone
c. improper anulation of the implant
d. damage to a nerve or a large blood vessel
e. all of the above

immediate placement implants are done
A. after the bone fills in the extraction socket
B. only when a bone graft is needed
C. to plug the hole made when teh maxillary sinus is accidentally perforated
D. at the time of extraction of the toth that wil be replaced

implants can be used to support which of the following prostheses
A. single crowns
B. fixed bridges
C. partial or complate dentures
D. all of the above

implant crowns are fixed to the implant fixture by which method?
A. cemented only
B. held in place with a screw only
C. welded on
D. cemented or held by a screw

the instruments used to clean implants where titanium is exposed include
A. carbon steel curettes
B. ultrasonic tips
C. plastic curettes and scalers
D. air polishers

which one of the following statements regarding the gingiva around an implant is false
A. when healthy, the gingiva produces a biological seal against the implant that prevents microorganisms from invading the deeper tissues
B. the gingiva is closely adapted to the implant but is not attached into the surface
C. the gingiva has connective tissue fibers that connect or integrate with the surface of the implant

the consequences of not maintaining good oral hygiene around an implant include all of the following except one?
A. increased bone growth due to chronic irritation
B. inflammation and swelling of the gingiva
C. loss of the biological seal
D. bacterial invasion and potential loosening of the implant