This is a metal frame for porcelan teeth.
If you have any questions for dental tehnician I Will try my best to answer to you.
Read next
It Is Important To Find The Right Dentist For Your Family Members' Oral Healthguest07 · What to Consider Before Choosing Veneers in Mississaugaguest09 · 
Why Choosing a Local Dentist Woombye Clinic Felt Less Stressful Than Expectedsmilenambour · Best Mouthwash for Gum Health After Dental Surgery and Gum Treatmentguest06 ·
From @bdent