Dental Lathe: Applications in Prosthodontics & Orthodontics

Instrument Overview

A dental lathe (bench lathe) is a motorized rotary tool used in dental laboratories for fabricating, finishing, and polishing prostheses and appliances.

Key Components

• Motor: 1/4–1/2 HP, variable speed (0–3,000+ RPM).
• Spindle/taper: Accepts collets, chucks, mandrels (e.g., 3/32", 1/8", HP).
• Attachments: Burs (carbide, diamond), stones, rubber wheels, brushes, felt cones, polishing mops.
• Dust collection: Essential (silica, metal particulates).

Primary Applications

Procedure	Examples	Tools
Prosthodontic fabrication	Denture base trimming, clasp adjustment, framework finishing, crown/bridge margins	Carbide burs, arbor bands, silicone polishers
Orthodontic appliance	Wire bending (custom arches), acrylic trimming (retainers), soldering prep	Wire cutters, pliers, polishing lathe
Implant prosthetics	Custom abutment modification, titanium polishing	Diamond burs, zirconia polishers
Repair/relines	Denture fracture repair, soft/hard reline finishing	Acrylic burs, heat-polymerizing units

Safety & Maintenance

• Eye protection (ANSI Z87.1), N95/respirator for aerosols.
• Secure workpiece (lathe chuck, pin vise, model holder).
• Speed selection: High for cutting, low for polishing (prevents heat damage).
• Daily: Clean spindle, lubricate per manufacturer, check belt tension.
• Annual: Professional calibration, motor service.

Digital Workflow Integration

CAD/CAM milling handles bulk reduction; lathe remains essential for:

• Fine detail finishing (margins, emergence profiles).
• Custom characterization (staining, glazing).
• Repair/remake of milled restorations.
• Orthodontic wire work (not millable).