Shopping for dental implants: 1  A comprehensive dental exam (with X-rays and possibly a CT scan, plus models made of the patient's mouth) is used to create an individualized treatment plan. The Mayo Clinic explains what to expect before dental implant surgery .
How do you use overdrive in a car with an automatic transmission? How to use overdrive Generally speaking, overdrive (O/D) is the highest gear in the transmission. On most cars the automatic transmission has 3 speeds and Overdrive (fo â¦ rth speed). Overdrive allows the engine to have less rpm with higher speed in order to have better fuel efficiency.
If you have an automatic transmission with both a D (Drive -- or sometimes it's labeled 3) and an OD (Overdrive), you can and should generally leave the gear selector in OD and let the transmission figure out what's best. Manual transmissions can have overdrive gears, too.