I have a few doubts on a few things. I hope you can check them for me.

1) I had a cavity in my first molar. So I made an appointment with the dentist. I went to the dentist (dentist's) and he devitalized my tooth.
2) The filling came out of my tooth and I had it filled (by the dentist).
3) I'm on sick leave. The National Health doctor gave me three days sick leave (??).
4)The doctor put stitches on my finger. Can you say: I had stitches put in my finger. Put some cream and rub it well in.

1) I had a cavity in my first molar. So I made an appointment with the dentist. I went to the dentist, and he devitalized my tooth. I don't know what "devitalized" means.

2) The filling had come out of my tooth, and I had it replaced by the dentist.

3) I'm on sick leave. The National Health doctor gave me three ,b>days' sick leave.

4)The doctor put stitches in my finger. Can you say: I had stitches put in my finger. <~~yes Put some cream on the wound, and rub it in well.

Sure, I can help you with your doubts. Let's go through each of them:

1) It seems like you had a cavity in your first molar and you went to the dentist for treatment. The dentist performed a procedure called "devitalization" on your tooth. Devitalization usually involves removing the infected or damaged pulp from the tooth and filling it with a special material. By having this procedure done, the dentist aims to save the tooth from further decay or infection.

2) It appears that the filling in your tooth came out, and you went back to the dentist to get it refilled. The dentist then performed a new filling on your tooth to restore it. This is a common procedure done to treat cavities and maintain the structural integrity of the tooth.

3) Based on your statement, it seems you are currently on sick leave. To obtain sick leave, you likely visited a National Health doctor who provided you with a sick leave certificate or note. This document serves as proof that you are unfit for work due to an illness or medical condition and provides you with a specific number of days for which you can take time off work to recover.

4) It sounds like you had a cut or injury to your finger that required medical attention. The doctor put stitches in your finger to close the wound and help it heal properly. Additionally, the doctor may have prescribed or recommended using cream to apply topically on the affected area. The instructions are to put the cream on your finger and rub it in thoroughly.

I hope that clarifies your doubts! If you have any more questions or need further explanations, feel free to ask.