100+ Free Stomatology Technology Qualification (China) Practice Questions

Oral Anatomy, Physiology & Dental Materials Science (口腔解剖生理学与口腔材料学)

Evaluates foundational anatomical landmarks, biomechanics, and chemical/physical properties of dental laboratory materials: morphology of anterior and posterior teeth, axial contours, embrasures, contact areas, and pulp cavity topography; occlusion concepts including centric occlusion, intercuspal position (ICP), canine protected occlusion, group function, curve of Spee, curve of Wilson, and Monson spherical theory; TMJ components (condyle, articular disc, glenoid fossa, retrodiscal tissue) and mandibular movement kinematics; composition, setting reactions, elastic recovery, and dimensional stability of impression materials (irreversible hydrocolloid, condensation/addition silicone, polyether); ISO dental gypsum types (Type I Impression plaster to Type V High-expansion die stone) and water/powder ratios; dental casting alloys (Co-Cr, Ni-Cr, pure titanium, Type I-IV gold alloys); dental ceramics (feldspathic porcelain, leucite-reinforced, lithium disilicate, 3Y/4Y/5Y-TZP zirconia), coefficient of thermal expansion (CTE) mismatch principles; and acrylic denture polymers (PMMA powder-liquid ratios, stages of dough formation, and heat curing cycles).

Fixed Prosthodontic Technology (固定义齿工艺学与数字化CAD/CAM技术)

Covers fixed restoration manufacturing processes, metal-ceramic bonding, and digital fabrication: working die preparation, trimming, ditching, and die spacer application thickness (20–40 μm); lost-wax technique, wax pattern sculpting for inlays, onlays, crowns, and multi-unit bridges; sprue placement (gauge, location, reservoir function), investment burnout temperature ramps and thermal expansion; dental casting machines (centrifugal, vacuum pressure), casting shrinkage compensation; porcelain-fused-to-metal (PFM) framework design, sandblasting (Al2O3 50–110 μm), degassing and oxidation heat treatment, chemical bonding and mechanical interlock at metal-ceramic interface; opaque porcelain application and firing, dentin and enamel layer build-up, anatomical form firing, staining, and self-glazing/over-glazing; all-ceramic restorations (lithium disilicate heat-press investment and press burnout; CAD/CAM milling of pre-sintered zirconia blocks, green-state coloring infiltration, high-temperature sintering furnace cycles at 1450–1530°C, and sintering shrinkage compensation ~20–25%); and porcelain laminate veneer refractory die and platinum foil techniques.

Removable Prosthodontic Technology (可摘局部义齿与全口义齿工艺学)

Encompasses design, surveying, metal casting, and polymer processing for removable prostheses: Kennedy classification system (Class I bilateral distal extension, Class II unilateral distal extension, Class III bounded saddle, Class IV anterior crossing midline) and Applegate rules; dental surveyor usage, determining path of insertion (tilting anteriorly, posteriorly, laterally), guide planes, survey lines (Class I, II, III survey lines), and clasp selection (Akers, Ring clasp, Back-action, Embrasure clasp, Roach T/I-bars, and RPI system: Mesial rest, Proximal plate, I-bar); major connectors (palatal bar/strap/plate for maxilla; lingual bar, lingual plate, sublingual bar for mandible) and minor connectors; refractory cast duplication using agar hydrocolloid, framework wax-up, investing, and casting; complete denture anatomical landmarks (incisive papilla, palatine rugae, vibrating line, maxillary tuberosity, retromolar pad, buccal shelf, mylohyoid ridge); custom tray border molding and master cast fabrication; baseplates and occlusion rims (wax rims height, width, labial fullness, Fox plate orientation); facebow registration and mounting on semi-adjustable articulators; balanced occlusion theory (Hanau's quint: Condylar guidance × Incisal guidance = Cusp height × Plane of orientation × Compensating curve); artificial tooth selection, arrangement on resorbed ridges (crossbite setup, neutral zone), and gingival festooning; flasking methods (half-flask vs full-flask split mold), boiling out wax, packing PMMA dough, trial closure, heat curing water bath cycles (74°C for 8 hours or 74°C for 2 hours followed by 100°C for 1 hour), bench cooling, deflasking, laboratory remounting, selective grinding to eliminate processing errors, and denture polishing.

Orthodontic Appliances, Dental Implant Prosthetics & Laboratory Quality Control (口腔正畸工艺、种植修复与技工室质量控制)

Addresses orthodontic hardware fabrication, implant-supported prosthetics, and laboratory quality management: physical properties of orthodontic wires (stainless steel, Ni-Ti, TMA/beta-titanium, Co-Cr-Ni), wire bending plier mechanics (three-prong, bird-beak, Young's pliers); construction of retention appliances (Hawley retainer, Adams clasp, labial bow with U-loops, circumferential retainer, clear Essix/Zendura aligners via vacuum/pressure thermoforming), active removable appliances (expansion screws, finger springs, sagittal appliances), and functional appliances (Twin Block, Frankel appliance, activator); indirect bonding trays for bracket placement; implant components and impression transfer methods (open-tray pick-up coping vs closed-tray transfer coping), soft tissue gingival mask fabrication, master cast implant analog placement; stock vs custom CAD/CAM titanium/zirconia abutments, screw-retained vs cement-retained implant crowns, multi-unit implant bridge screw-retained frameworks, passive fit verification; dental laboratory health and safety (silica dust control, local exhaust ventilation, personal protective equipment PPE, eye protection against laser and casting glare), disinfection and cross-infection protocols for incoming dental impressions and outgoing prostheses (sodium hypochlorite, glutaraldehyde, quaternary ammonium), and quality defect root-cause analysis (porcelain crazing/chipping, casting incomplete/porosity, denture base porosity, clasp breakage, occlusal elevation).