AZDENT 1st Molar Bondable Monoblock Non-Convertible Single MBT/Roth 0.022 Buccal Tube. Dental Orthodontic Buccal Tubes 1st Molar MBT ROTH 022 Monoblock. MIM Monoblock Orthodontic Buccal Tube. Flat Lingual Retainer Wire is ideal for maxillary and mandibular bonded lingual retainers.