pit and fissure sealants
TRANSCRIPT
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Pit And Fissure Sealant
Guided by: Department of pedodonticsSubmitted by : Aditi Gupta
Dharmendra Bijapari
Department of Pedodontics
2015-2016
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DEFINITIONS
INTRODUCTION
HISTORY
MORPHOLOGY
CLASSIFICATION
IDEAL REQUIREMENTS
MATERIALS USED
INDICATIONS AND CONTRAINDICATIONS
WHICH TEETH SHOULD BE SEALED?
AGE RANGES FOR SEALANT APPLICATION
TECHNIQUE OF APPLICATION
CONCLUSION
CONTENTS
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PIT : It is defined as a small pinpoint depression located at a junction of developmental grooves or at terminals of those grooves. The central pit describes a landmark in the central fossae of molars where developmental grooves join. (ash 1993)
FISSURE : It is defined as deep clefts between adjoining cusps. They provide areas for retention of caries producing agents. These defects occur on occlusal surfaces of molars and premolars, with tortuous configurations that are difficult to assess from the surfaces. These areas are impossible to keep clean and highly susceptible to advancement of caries lesion. (Orbans 1990)
DEFINITION
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The high susceptibility of pit and fissure to caries presents a major dental problem and provide the rationale for caries control of these areas .
Although only 12.5% of all tooth surfaces are occlusal, these surfaces develop more than 2/3rd of total caries experience of children .
Caries potential is directly related to the shape and depth of the pits and fissure .
With this understanding ,the eradication of pit and fissure would eliminate them as caries opportunity sites.
INTRODUCTION
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A thin plastic coating placed in the pit and fissures of the teeth to act as
a physical barrier to decay.
As a way to prevent caries and protect the tooth .
WHAT & WHY!?
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The molar teeth have many fissures and pits, which can be very difficult to keep clean.
These are the sites most susceptible to developing
decay
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Hyatt (1923) : proposed technique called as prophylactic odontotomy.
Bodecker(1929): proposed technique called fissure eradication.
Bunocore(1955): advocated the filling of pit and fissure with bonded resins.
Bowen(1965): reported BIS-GMA material development.
HISTORY
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MORPHOLOGY
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Mitchell and Gordan (1990) stated that the sealants can be differentiated in the following ways:
1 .Polymerization methodsa) Self activation (mixing two components)b) Light activation:
- First generation: Ultraviolet light - Second generation: Self cure - Third generation: Visible light
- Fourth generation: Fluoride releasing
2 .Resin systems BIS-GMA
Urethane acrylate
3 .Filled and unfilled
4 .Clear or tinted
CLASSIFICATION
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1 .A viscosity allowing penetration into deep and narrow fissures even in maxillary teeth.
2 .Adequate working time3 .Rapid cure
4 .Good and prolonged adhesion to the enamel5 .Low sorption and solubility
6 .Resistence to wear7 .Minimum irritation to tissues
8 .Cariostatic action
IDEAL REQUISITES OF AN EFFICIENT SEALANT(Brauer, 1978)
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Resin based sealants
Glass ionomer sealants
MATERIALS USED FOR P&F SEALANT
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o May or may not contain filler particles or fluoride.o The setting reaction can be automatic(auto-
polymerised) or light activated (light-polymerised). .
o Low viscosity resin-based RM (flowable composite) have also been used as fissure sealant.
o retention rates 2%–80% better than the GIC sealants.
resin-based sealants:
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glass ionomer sealants :
o can adhere directly to tooth substance.o release fluoride over time. o Less sensitive to moisture contamination than
resin-based materials.o Retention is a major problem with GIC sealants, but if this concern can be resolved, there
maybe advantages to the GIC sealants through the release of fluoride.
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all permanent molar teeth without cavitation (i.e., free of caries or incipient caries).
early (non- cavitated) carious lesions in children, adolescents and young adults to reduce the percentage of lesions that progress (Griffin et al. 2008).
teeth that have deep and narrow pit and fissure morphology (the caries risk is increased because of difficulties to clean the tooth).
teeth with stained grooves
: Indications
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on the primary molars of children who are susceptible to caries (i.e., high caries risk).
Sealants should be placed on first and second permanent molar teeth within 4 years after eruption.
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Sealants should not be placed on partially erupted (i.e., once there is gingival tissue on the crown)
Teeth with cavitation or caries of the dentin
Wide and self cleansable pit and fissure Pit and fissures that have remained carious
free for 4 years or longer.
Contraindications:
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Which teeth should
be sealed?
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the most important teeth for sealant application are the first and second permanent molar teeth.
Other teeth, such as premolars, third molars or the palatal surfaces of incisor teeth, may be considered for sealant application, based on:
o caries risk status.o and assessment of the tooth surface.
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So we can say: 1 .Child with occlusal caries on one of the first
permanent molar.
Seal the remaining sound first permanent molars.
2 .Occlusal caries affecting one or more first permanent molars
Need to seal the second permanent molar as soon as they have erupted sufficiently.
3 .Tooth should be sealed within 2 years of eruption.
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for some children, such as those with medical or other conditions where the development of
caries or its treatment could put the child’s general health at risk, sealing primary molar teeth should
be considered as part of a comprehensive caries-preventive program .
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As soon as the tooth is sufficiently erupted to be isolated.
Time of eruption :Primary molars
3-4 yearsfirst permanent molars:
6-7 years second permanent molars and premolars:
11–13 years
AGE RANGES FOR SEALANT APPLICATION
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it is very important to adequately isolate the teeth because the salivary contamination is the major cause of loss of sealants in the first year.
Just remember
How important is isolation?
Isolate the tooth to be sealed with either a dental dam or cotton wool rolls/isolationshields combined with effective aspiration
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Application Technique
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Tooth selection :
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Cleaning
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Isolation
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Sealant retention should be checked with a probe after polymerisation to ensure that all fissures are completely sealed.
If any material is dislodged, the sealant should be reapplied after re-cleaning (if necessary.
Testing Retention
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the recall interval for high caries risk children should not exceed 12 months.
if isolation has been difficult to achieve or the
sealant has been applied over a suspicious lesion, recall within 6 months.
OPTIMUM TIME FOR REVIEWING
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Thanks You