The main difference would be that the retainer substance is thicker and intended to last for years, although aligners are made to last for your few weeks. ผู้ที่มีฟันล่างยื่นออกมาข้างหน้ามาก Vivera also charges its retainers in sets of four, which raises the value. Dr. Pinto says that”In my apply, we use Invisalign’s https://franzn418yce9.p2blogs.com/profile