Very high risk of faliure!!!!! You may go beyond the apex of the tooth and make the patient weep like a baby! And finally, the ability to concentrate for hours and hours- even computer consoles games can assist this! So, if you are stumped of ideas, just think what qualities a brain surgeon might have- its pretty much similar.
Likewise, too much NO2 and 02 or local anaesthetic may knock the patient out or cause brain damage! Precision skills- as the OP suggested, soldering on circuit boards, computer building (lool at the other guy who suggested this, coincidentally, i used 2 work for maplin!)- this may give you the upper hand in close technical procedures in dentistry for example root canal treatment! A hobby- for example Nitro R/C cars and Engine building- by analogy the engine is similar to a patients mouth in the sense that changing the air/ fuel ratio mixture may cause severe damage to the piston and overheating of the engine head. Hey i believe showing an interest in the following may help: playing a musical instrument- e.g.