Lecture 1, Operative Dentistry (Slides)
Transcript of Lecture 1, Operative Dentistry (Slides)
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Conservative Dentistry 1- Dent 335(Operative Dentistry)
Ghada Maghaireh BDS, MSAmerican Board in Operative Dentistry
Jordanian Board in Restorative Dentistry
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Outline
Scope of Operative Dentistry Caries Classification
Cavity classification Instrumentation
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Operative Dentistry
The art & science of the
diagnosis, treatment and
prognosis of defects of teeth that do not require
full coverage restoration
for correction. Prevention, preservation,
interception & restoration.
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Dental Caries
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Classification of Dental Caries
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1)Prior condition of the tooth:
Primary (initial) Caries : The
process attacks the tooth surface
for the first time, regardless of
progression or extent.
Secondary (Recurrent ) caries:
The process attacks the tooth at
the margin or margins of anexisting restoration, regardless of
extension or progression.
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2)Situation of the tooth:
Acute Caries: Involves a
large number of teeth in the
mouth, and destruction of
tooth structure is usually quiet rapid.
Chronic Caries: Much lower
progression of the lesion, and
the average lesion size is
smaller than in acute caries.
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Active caries: Describe
lesion that progressively
destroys more toothstructure.
Arrested caries:
Occurs when the active
degradative process is
interrupted or ceases.
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Incipient caries: The lesion is
confined to enamel and does
not penetrate the DEJ.
Advanced caries: The lesion
penetrates the DEJ.
3)Stage of development:
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4)Location of the Lesion:
Pit & fissure caries: originates in
developmental irregularities, most
often in the occlusal surface of
posterior teeth.
Smooth surface caries: In smooth
surfaces of crown of teeth.
Root caries: Does not originate in
crown of teeth, but rather on the
root structure.
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Classification of Cavities
Cavity: Describes the defect in the tooth, whichis the result of caries.
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Cavity preparation (prepared cavity): Is the
result of specific operative procedure that has
removed the caries or defect and shaped the
tooth to receive and retain the restorative
material.
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Restorative material:
That is used to restorethe cavity, i.e. Amalgam.
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Restoration: The cavity preparation plus the
restorative material.
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Black’s Classification of Cavities
Class I
Class II Class III
Class IV
Class V
Class IV
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Class I
Originate in structural
defects of the tooth,
such as pits andfissures.
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Class II
Originate in the proximal surfaces of
molars and premolars.
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Class III
Originate on the proximal surfaces of anterior teeth ( incisors & canines) but do
not involve the loss or removal of the
incisal angle.
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Class IV
Involve the proximal surfaces of anteriorteeth, and include the loss or removal of
the incisal angle.
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Class V
Found in the gingival (cervical) third of thefacial and lingual surfaces of the crown of any
tooth.
With the exclusion of cavities resulting fromClass I pit or fissure caries.
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Class VI
Located on incisal edge of incisors &canines
And on cusp tips of canines & posterior
teeth.
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Classification by Complexity
Simple: Involve only one tooth surface.
Compound: Involve two tooth surfaces.
Complex: Involve three or more toothsurfaces.
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Classification by Surface
Prepared cavities or restoration
take the name of that surface or
surfaces.
One Surface: i.e. O
Two Surfaces: i.e. MO, DO
Three Surfaces: i.e. MOD
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Components of Prepared Cavity
Wall: The inclosing side of a prepared cavity
that takes the name of the adjacent surface of
the tooth , i.e. M, D.
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Components of Prepared Cavity
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Components of Prepared Cavity
Line angle: The line,
or angle formed when
two walls of a prepared
cavity meet. It is namedby combining the
names of intersecting
walls, i.e. Linguopulpalline angle.
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Components of Prepared Cavity
Point angle: The angle or
corner formed by the
junction of three walls of aprepared cavity. It take the
name of the three walls
that join to form it, i.e.
Linuoaxiogingival point
angle.
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Components of Prepared Cavity
Cavosurface angle:
The line or angle
formed by thejunction of a cavity
wall with the
unprepared surface of
the tooth