The effects of pre-tapping on the miniscrew-bone interface in the midface.
The effects of pre-tapping on the AO miniscrew-midface bone interface were investigated in 140 methacrylate-fixed human cadaver specimens. An adequate contact was found in all 40 self-tapped and in 68 out of 100 pre-tapped samples. Since inadequate contact was found in the remaining 32 specimens from the pre-tapped group, it was concluded that the pre-tapping was responsible for the inadequate bone screw interface.
Bähr
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Dept. of Oral and Maxillo-Facial Surgery, University Hospital Freiburg, West-Germany.
D001863:Bone Screws; D004867:Equipment Design; D005147:Facial Bones / Q000033:anatomy & histology*; D006801:Humans; D008859:Microscopy, Polarization; D009915:Orbit; D011312:Pressure; D013314:Stress, Mechanical; D013499:Surface Properties; D015050:Zygoma