Figure 11-14. - Basic bur head shapes and sizes.
provider's chair is designed with an adjustable backrest (fig. 11-15). The assistant's chair on the other hand, has an adjustable armrest that wraps around to the front of the chair (fig. 11-16). Chairs for both the provider and the assistant should be well-padded and comfortable. They both must have adjustable seat height, as well as a broad base to give stability. Normally, chairs with at least four to five casters are preferred. The chair should have a foot support ring so that the users can keep their feet parallel to the floor, thereby maintaining comfort and proper posture.
Figure 11-15. - Provider's mobile chair.
Figure 11-16. - Assistant's mobile chair.
Level I maintenance on mobile chairs consists of making adjustments, lubricating the caster bearings, and cleaning. The adjustments involve seat height and backrest or armrest positions. Lubricate the caster bearings with light-weight machine oil monthly. Never lubricate the single shaft on these chairs,Continue Reading