Final answer:
The Elite Buccal Tube for lower molars comes with a choice of a weldable or bondable base and a convertible or non-convertible cap, depending on the orthodontic treatment needs.
Step-by-step explanation:
The Elite Buccal Tube for the lower 6s comes with either a weldable base and a/an convertible cap or a bondable base and a/an non-convertible cap. These are orthodontic devices used to aid in the alignment and leveling of teeth, specifically the lower molars (referred to as the 6s). The choice between weldable or bondable bases usually depends on the treatment plan and clinical preferences, with weldable bases being soldered to bands and bondable bases being adhered directly to the tooth surface. Convertible caps allow for the option of placing an archwire directly into the buccal tube, which can later be converted as treatment progresses, whereas non-convertible caps do not allow for such conversion.