All specimens were randomly divided into three groups (group I: Tetric (r) Flow + CERANA inlay; group II: Tetric (r) Flow + Tetric (r) Ceram + CERANA inlay; and goup III: Tetric (r) Flow + Tetric (r) Ceram).
Phục hồi được thực hiện theo 3 kỹ thuật khác nhau: nhóm I: Tetric (r) Flow / Inlay CERANA; nhóm II: Tetric (r) Flow / Tetric (r) Ceram / Inlay CERANA; nhóm II: Tetric (r) Flow / Tetric (r) Ceram.