Q. Which site of below implant is prone for failure/ breakage or weakest region ?
a. Head shaft junction ( red line)
b. Shaft of screw. (green line)
c. Shaft thread junction (yellow line)
d. Thread area (orange line)
e. Tip (blue line)
Answer -
c
In a partially threaded screw the area where shaft ends and thread begins is weakest.
This area is also called 'Run Out' of the screw.
a. Head shaft junction ( red line)
b. Shaft of screw. (green line)
c. Shaft thread junction (yellow line)
d. Thread area (orange line)
e. Tip (blue line)
Answer -
c
In a partially threaded screw the area where shaft ends and thread begins is weakest.
This area is also called 'Run Out' of the screw.
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