Dear patient. Although this information and the photos are not enough to provide a detailed treatment option.   Based on the photos you will benefit from teeth alignment. And decrease chances of more dental damage. This dental treatment is best done early. As you can prevent new dental issues from starting. Visit an orthodontist in your city for check up. Avoid self diagnosis and self treatment. Hope this helped .

Just maintain your oral hygiene Brush twice a day Visit your nearby dentist and do dental scaling

From the picture there seems nothing wrong Cracks on teeth are normal and common For mal alignment you can visit an orthodontist

Hi, Please get a routine blood test done. Also get your Vitamin D3 levels checked. The tooth chip could be due to an unknown trauma while biting on something.

Hello. 1)Get physically examined once for trauma from occlusion which could also be a cause for brittle teeth in front. 2)Get vit D and calcium levels checked  if bones are getting weaker that will help in preventing further loss

Full mouth scalling needed Mentain oral hygiene brush twice Use mouth wash