Implants-beginner-healing abutment

Hello, could you please advise me?I have done my first implant.When I placed the healing abutment I used a torque wrench on 10 N.cm to be sure it wouldn´t become loose. When I wanted to replace it with a scan body, I tried to use only a srewdriver and it was very tight so I took a torque wrench to help and the healing abutment came outside together with my implant and they were conected quite tight!!!
So i´ve got a few questions-can I use a torque wrench or better not when srewing a healing abutment?
Does it mean that the implant was not fully osseointegrated when it came out with the healing abutment relatively easily?