牙科材料PPT课件

Molecular controls for the initiation and early stages of tooth morphogenesis
Features often noted in normal yet aging tooth
Diverse ramifications (branching) of apical pulp space anatomy
Accessory foramen (arrow) in mandibular anterior tooth.
Canal size and shape are a reflection of the external root surface
Necrotic pulp in maxillary second premolar in which irritants egress through lateral canals to the periodontium,creating inflammatory lesions (arrows).
• Indirect restorative dental materials
Impression materials Cast mental restorations Dental cements Machined restoration （CAD/CAM)
Activate Mercury
Amalgam Capsule
White spot
Removal of orthodontic brackets
Class 1 Class 6 Class 1
Class 2
Class 4
Class 2
Class 3
Class 5
caries
Insertion and carving
Class Ⅰ Class Ⅱ
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Dental plaque Calculus
A, human pulp specimen showing dentin (D), predentin (P), odontoblast layer (O), cell-free zone (CF), cell-rich zone (CR), and central pulp (CP).
B, magnification.
Amalgamator
Amalgam carrier Squeeze Cloth
Insertion and carving
Class Ⅰ Class Ⅱ
Clearfil SE Bond (Kuraray, Japan)
Optibond Solo plus (Kerr, USA)
Prime&Bond NT (Dentsply, USA)
White spot
Removal of orthodontic brackets
Beveled enamel margin
Liners and bases
zinc oxide calcium hydroxide varnish zinc phosphate cement glass ionomer
Dental materials
• Direct restorative dental materials
Dental amalgam Liners and bases Dental adhesion (dental bonding) Pit and fissures sealants Dental composites Glass ionomer cement Direct filling gold
Cross-section from the central pulp showing major support systems, including arterioles (A) with a muscular wall, thin-walled lymphatics (L), venules (V), and nerve bundles (NB) containing myelinated (有髓鞘） and unmyelinated nerves.
replacement of amalgam by composite
Proximal locks
Dental lamina arising from the oral ectoderm
Terminal capillary network
Reparative dentin
Enamel knot
Bony lesions healed several months following root canal treatment.
Inset demonstrates method of sectioning molars for viewing furcations.
Diagram of peripheral pulp and its principal elements.