Dental Materials
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DENTAL • MATERIALS * Study of physical and chemical properties of the metallic and non-metallic materials used in dentistry
OBJECTIVES 1. In order to know the basic physical and chemical properties as they are related to its manipulation by the dentist. 2. To bridge the gap between the knowledge obtained in the basic courses like chemistry, physics and its relation…
Physical properties: hardness, strength, brittleness
Chemical properties: composition, ingredients
* Most of dental materials used are solids, liquids, and colloids
CLASSIFICATION OF SOLID 1. Crystalline – exhibits rigidity (hard), atoms are arranged in a regular space lattice 2. Semi-crystalline – hard but not as hard as crystalline, arranged in regular lattice, not as rigid as crystalline 3. Amorphous – no definite melting and freezing point (impression compounds/materials) thermoplastic material – melts in hot, forms in cold
SCOPE OF THE STUDY OF DENTAL MATERIALS
Restorative dentistry
Operative Dentistry – caries fillings. Erosion, attrition & abrasion (reduction of tooth tissues) acidic foods cause tooth erosion
Prosthodontics
1. Fixed Partial Denture (FPD) 2. Removable Partial Denture (RPD) 3. Complete Denture (CD) 4. Maxillofacial – accident cases
MATERIALS THAT ARE NOT INCLUDED IN THE STUDY 1. Anesthesia 2. Medicament 3. Materials used in surgery 4. Materials used in orthodontics
SPACE LATTICE * Any arrangement of atoms in space, so that atoms are situated similarly to every atom 1. Simple Cubic – cube with atoms at the corners
2. Face Centered – simple cubic but there are additional atoms at each face (6 faces) 3. Body Centered – on atom at symmetrical center of simple cubic 4. Closed-packed Hexagonal – two or more cubic space lattice
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GYPSUM
* Mineral mined, CaSO4 • 2H2O *
DENTAL • MATERIALS * Study of physical and chemical properties of the metallic and non-metallic materials used in dentistry
OBJECTIVES 1. In order to know the basic physical and chemical properties as they are related to its manipulation by the dentist. 2. To bridge the gap between the knowledge obtained in the basic courses like chemistry, physics and its relation…
Physical properties: hardness, strength, brittleness
Chemical properties: composition, ingredients
* Most of dental materials used are solids, liquids, and colloids
CLASSIFICATION OF SOLID 1. Crystalline – exhibits rigidity (hard), atoms are arranged in a regular space lattice 2. Semi-crystalline – hard but not as hard as crystalline, arranged in regular lattice, not as rigid as crystalline 3. Amorphous – no definite melting and freezing point (impression compounds/materials) thermoplastic material – melts in hot, forms in cold
SCOPE OF THE STUDY OF DENTAL MATERIALS
Restorative dentistry
Operative Dentistry – caries fillings. Erosion, attrition & abrasion (reduction of tooth tissues) acidic foods cause tooth erosion
Prosthodontics
1. Fixed Partial Denture (FPD) 2. Removable Partial Denture (RPD) 3. Complete Denture (CD) 4. Maxillofacial – accident cases
MATERIALS THAT ARE NOT INCLUDED IN THE STUDY 1. Anesthesia 2. Medicament 3. Materials used in surgery 4. Materials used in orthodontics
SPACE LATTICE * Any arrangement of atoms in space, so that atoms are situated similarly to every atom 1. Simple Cubic – cube with atoms at the corners
2. Face Centered – simple cubic but there are additional atoms at each face (6 faces) 3. Body Centered – on atom at symmetrical center of simple cubic 4. Closed-packed Hexagonal – two or more cubic space lattice
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GYPSUM
* Mineral mined, CaSO4 • 2H2O *