¨Due to presence of broad
contact area, the gingival floor of the proximal box should be wide
¨The box should converge
occlusally with the buccal and lingual wall paralleling the external tooth
surface .the walls of proximal box should meet the occlusal wall in a straight
line
¨It include removing all chips and lose debris that
have accumulated ,drying the preparation and making a final complete inspection
of the preparation for any remaining infected dentin or any condition that
renders the preparation unacceptable to receive the restorative material.
¨It is the further development when indicated of a
specific cavosurface design and degree of smoothness that produces maximum effectiveness of
the restorative material used.
¨Many preparation require additional retentive features
.When the tooth preparation include both occlusal and proximal surfaces each of
those area should have independent retention and resistance features
¨It is that shape or form of the cavity that provide
for adequate observation accessibility
and ease of operation in preparing and restoring the tooth.
This is that shape and placement of cavity walls that best enables
both the restoration and tooth to withstand without fracture the masticatory
forces delivered principally along the long axis of the tooth.
¨CLASS I:All pit and fissure lesion on occlusal surface of premolars and
molars, lesion on occlusal 2/3rd of the facial and lingual
surface of molars and lesion on lingual surface of maxillary incisor
¨CLASS II:Lesion on proximal surface of posterior teeth
¨CLASS III :Lesion on proximal surface of anterior teeth
that do not involve incisal edge
¨CLASS IV :Lesion on proximal surface of anterior
involving incisal edge
¨CLASS V :Lesion on gingival third of facial or lingual
of all teeth
¨CLASS VI :Lesion on incisal edge of anterior teeth or
occlusal cusp tip of posterior teeth
A cavity in the dentistry is defined as ‘a defect in enamel,
detin or cementum resulting from the pathological processes, mostly the
dental caries’.Other processes such as abrasion, erosion etc.can also cause
such defects (SKIRI)
‘Infectious,
microbiological disease that results in localized dissolution and
destruction of calcified tissues of the teeth.’ ( Sturdevant)
Most
restorative treatment was due to caries. The tooth was cavitated and
was referred to as a cavity. when the affected tooth was repaired, the cutting
or preparation of the remaining tooth structure was referred to as cavity
preparation.
This blog will give you some idea about the topics related to
dentistry and orthodontics. Suggestions are one of the best ways to improve the
blog, so they are always welcomed. This may be helpful for you or maybe not. It
will at least helpful to create presentation as project or seminar.