2013 Lecture 2 Development Tooth
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Transcript of 2013 Lecture 2 Development Tooth
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The Growth and Development The Growth and Development and of The Teethand of The Teeth
Drg BUDDIWATI PUNTA Drg BUDDIWATI PUNTA sp.KGsp.KG
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Tooth DevelopmentTooth Development Tooth developmentTooth development is the complex process is the complex process
teeth form from embryonic cells, grow, teeth form from embryonic cells, grow, and erupt into the mouth and erupt into the mouth ODONTOGENESISODONTOGENESIS
Primary (baby) teeth start to form between Primary (baby) teeth start to form between sixth and eighth week intra uterinesixth and eighth week intra uterine
Permanent teeth begin to form in the Permanent teeth begin to form in the twentieth weektwentieth week intra uterine intra uterine
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Tooth development is commonly divided into Tooth development is commonly divided into the following stage:the following stage:
1.1. Bud stageBud stage
2.2. Cap stageCap stage
3.3. Bell stageBell stageii
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Streptococcus mutans, a bacteria found in the mouth, contributes to tooth decay.
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PLAQUEPLAQUE
Plaque:Plaque: is a biofilm is a biofilm contains more than contains more than
600 different 600 different identified species identified species of bacteriaof bacteria
Streptococcus mutans, a bacteria found in the mouth, contributes to tooth decay.
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Saliva and oral health
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There are three major salivary There are three major salivary glands found in the mouthglands found in the mouth
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Hydrating–moisturizing• Cleansing• Lubrication• Digestion• Remineralization of dentition(pH maintenance, buffering)
• Maintenance of mucosal integrity• Immunity mediator• Antimicrobial (antifungal, antibacterial)• Stimulation of minor salivary glands• Cellular maintenance• Enables swallowing• Enables tasting Enables speech articulation
Function of salivaFunction of saliva
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PH VALUEPH VALUE pH values:pH values: measure of acidity or measure of acidity or
alkalinity of a solution alkalinity of a solution
measured on a scale of measured on a scale of 1-14 1-14
pH of 7 indicated that pH of 7 indicated that the solution is neutralthe solution is neutral
pH of the mouth is close pH of the mouth is close to neutral until other to neutral until other factors are introduced factors are introduced
pH is a factor in pH is a factor in demineralization and demineralization and remineralizationremineralization
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DEMINERALIZATIONDEMINERALIZATION Demineralization:Demineralization:• mineral salts dissolve mineral salts dissolve
into the surrounding into the surrounding salivary fluid: salivary fluid:
– enamel at enamel at approximate pH of approximate pH of 5.5 or lower5.5 or lower
– dentin at dentin at approximate pH of approximate pH of 6.5 or lower 6.5 or lower
• erosion or caries can erosion or caries can occur occur
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REMINERALIZATIONREMINERALIZATION
Remineralization:Remineralization:•pH comes back to pH comes back to neutral (7)neutral (7)•saliva-rich calcium and saliva-rich calcium and phosphatesphosphates•minerals penetrate the minerals penetrate the damaged enamel damaged enamel surface and repair it:surface and repair it:
– enamel pH is above enamel pH is above 5.55.5
– dentin pH is above dentin pH is above 6.56.5
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Stages of tooth decayStages of tooth decay
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DENTAL CARIES-DENTAL CARIES-PULPITISPULPITIS
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GINGIVITIS AND GINGIVITIS AND PERIODONTITISPERIODONTITIS
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DENTAL PLAQUEDENTAL PLAQUE
Dental plaque -> soft Dental plaque -> soft deposit that form the deposit that form the biofilm adhering to the biofilm adhering to the tooth surface.tooth surface.
Not removed by Not removed by rinsing with water.rinsing with water.
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GINGIVITISGINGIVITIS
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MODERATE GINGIVITISMODERATE GINGIVITIS
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SEVERE GINGIVITISSEVERE GINGIVITIS
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DISCLOSING SOLUTIONDISCLOSING SOLUTION
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CALCULUSCALCULUS
Calculus is calcified Calculus is calcified plaque, that form by plaque, that form by mineralization of mineralization of dental plaque and dental plaque and cannot be removed cannot be removed by brushing teeth.by brushing teeth.
Supra and sub Supra and sub gingival calculus gingival calculus
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PERIODONTITISPERIODONTITIS
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Bacterimia Bacterimia enzim enzim plaqueplaque arteriosclerosisarteriosclerosis
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WHY DENTALCARE IS IMPORTANT DURING
PREGNANCY? BacteriaBacteriaendotoxendotox
inin inflammatory inflammatory mediator activated mediator activated translocation to translocation to placenta placenta membranemembrane contraction contraction uterine muscle uterine muscle baby born weight baby born weight lossloss
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THANK YOUTHANK YOU
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BUD STAGEBUD STAGE
Early stage of Early stage of tooth developmenttooth development
The dental lamina The dental lamina invaginatus from invaginatus from the oral ephiteliumthe oral ephitelium
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