From: Removal capability, implant-abutment connection damage and thermal effect using ultrasonic and drilling techniques for the extraction of fractured abutment screws: an in vitro study
Study Group
n
Mean
SD
Minimum
Maximum
DT
10
− 0.09 a
0.02
− 0.11
− 0.07
UT
− 0.93 b
0.32
− 1.42
− 0.61