lecture 1, operative dentistry (slides)

8/4/2019 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

Outline

Scope of Operative Dentistry Caries Classification

Cavity classification Instrumentation

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.

Dental Caries

Classification of Dental Caries

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.

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.

Active caries: Describe

lesion that progressively

destroys more toothstructure.

Arrested caries:

Occurs when the active

degradative process is

interrupted or ceases.

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:

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.

Classification of Cavities

Cavity: Describes the defect in the tooth, whichis the result of caries.

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.

Restorative material:

That is used to restorethe cavity, i.e. Amalgam.

Restoration: The cavity preparation plus the

restorative material.

Black’s Classification of Cavities

Class I

Class II Class III

Class IV

Class V

Class IV

Class I

Originate in structural

defects of the tooth,

such as pits andfissures.

Class II

Originate in the proximal surfaces of

molars and premolars.

Class III

Originate on the proximal surfaces of anterior teeth ( incisors & canines) but do

not involve the loss or removal of the

incisal angle.

Class IV

Involve the proximal surfaces of anteriorteeth, and include the loss or removal of

the incisal angle.

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.

Class VI

Located on incisal edge of incisors &canines

And on cusp tips of canines & posterior

teeth.

Classification by Complexity

Simple: Involve only one tooth surface.

Compound: Involve two tooth surfaces.

Complex: Involve three or more toothsurfaces.

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

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.

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.

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.

Cavosurface angle:

The line or angle

formed by thejunction of a cavity

wall with the

unprepared surface of

the tooth

lecture 1, operative dentistry (slides)

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