Clinical Chairside Procedures
Domain overview
Clinical Chairside Procedures tests your ability to prepare, assist, and finish common orthodontic procedures: bonding and banding, arch-wire changes, impressions, moisture control, and appliance removal. The exam favors sequencing questions-what comes first, what must stay dry, what is checked before the patient leaves.
Bonding and banding
Typical direct-bond sequence: isolate the field; clean with pumice; rinse and dry; etch enamel; rinse and dry to a frosty white; apply primer; place adhesive; seat the bracket; remove excess; light-cure. If saliva or glove contact contaminates etched enamel, re-etch. Bands are trial-seated, checked for fit, cemented, and cleaned of excess cement before it sets.
Wire changes and moisture control
Remove elastomeric ligatures with a scaler or ligature cutter; untwist steel ligatures; remove the arch wire with a Mathieu or needle holder. Insert the new wire with a Weingart plier, ligate, and cut distal ends with a distal end cutter while holding the cut segment. Suction, cheek retractors, cotton rolls, and dry angles keep the field isolated.
Impressions and records
For alginate, measure powder and water per manufacturer, spatulate to a smooth mix, load the tray, seat, and remove after set. Pour promptly or store per instructions. Bite registrations are taken in centric occlusion. Label models and photos with patient identifiers.
Worked example
You are bonding a maxillary central incisor bracket. After etching, the patient swallows and saliva floods the tooth. The correct response is to rinse, dry, and re-etch-not to apply primer over the wet surface. Primer and adhesive bond to dry, etched enamel; contamination weakens the bond and can cause a bracket failure. After re-etching and drying, continue primer, adhesive, bracket placement, excess removal, and light cure.
Traps
Do not touch etched enamel with a gloved finger. Do not overfill the primer or adhesive. Do not let alginate set past its working time before seating. Do not cut a wire intraorally without suction and a safety hold. Do not skip the final check for sharp ends, loose ligatures, and patient comfort.