You need at least one tooth. I sometimes find that there are air bubbles and voids in the core. Use a matrix and a syringe to avoid this situation and apply the core material under pressure. Stainless steel is a more resilient metal, but titanium alloy is stronger. However, the trade-off for the stronger metal is that titanium is more brittle and is prone to breakage.
Most dentists use stainless steel posts.
A post is used to retain the core material, which provides support for the restoration of an endodontically treated tooth. Pins are used to support core build-up materials and are placed in the coronal dentin, not in the root canal. Leave at least 5 mm apically to prevent complications and to deliver a tight endodontic seal. You must remove the post to retreat the canal in the case of an infection. We welcome your responses and questions.