The dentist told me that i need a root canal or i'll loose both of the teeth, the hole is between 2 teeth an is very sensitive can i get filling?

Root canals: All depends on how large and close the cavities to pulp(nerve).And also on the symptoms . If you are not sure what to do seek second opinion , always helps to seek second opinion, make sure if endo is warranted have a specialist or someone who has extensive experience in doing endo , if root canals are not done properly then eventually they will fail and either lose the tooth or get retreated

X-Ray Needed: An x-ray would be really helpful; however, let's go over some symptoms here. You may need a root canal if: 1. Tooth hurts just sitting and being still. 2. Tooth hurts being bathed in warm/hot water. 3. Tooth hurts to biting/tapping and the pain lingers for longer than 3-5 sec. 4. Tooth hurts to cold and the pain lingers for longer than 3-5 sec. 5. Tooth feels longer than normal, bite on it first.

Depends: It;s hard to say without an x-ray, but it sounds like the nerve in your tooth is damaged, and the only way to take care of that is a root canal treatment. Without more information, it is impossible to tell you that a filling alone would be sufficient.

Trust, then proceed: Without actually being able to personally examine you and see x-rays of those teeth, no one over the internet can tell you what you should or shouldn't have done, and what would be the appropriate treatment or your options. Have your dentist explain to you what needs to be done and why. If you don't believe or trust him\her, find another dentist whom you do trust.