Chapter 35: Sealants Flashcards
an organic polymer (resin) that flows into the pit or fissure of a posterior tooth and bonds by mechanical retention to the tooth.
pit and fissure sealant
Topically applied fluorides protect ______ tooth surfaces more than occlusal surfaces; dental sealants reduce the incidence of occlusal dental caries.
smooth
Sealant application is a part of a complete prevention program, not an ____ procedure.
isolated
by using an acid-etchant process, the enamel could be altered to increase ____
retention
Purposes of the Sealant
-Provide a physical barrier to the pit or fissure.
-Fill the pit or fissure as deep as possible
-Provide continued protection in the depth of the micropore
purposes of acid etch
-To produce irregularities or micropores in the enamel.
-Allow the liquid resin to penetrate into the micropores and create a BOND or MECHANICAL LOCKING
The clinician decides which material will be most beneficial depending on:
-An assessment of patient needs.
-Sealant placement environment.
-Available supplies.
Criteria for the Ideal Sealant
-prolonged bonding to the enamel.
- biocompatible with oral tissues.
- simple application .
- free-flowing, low-viscosity
- low solubility in the oral environment.
A majority of sealants in clinical use are made of______
bis-GMA
Classification by the Method of Polymerization:
-Self-cured or autopolymerized
-Visible light-cured or photopolymerized
Classification by Filler Content
-filled
-unfilled
-flouride releasing
purpose of filler :
inrease bond strength and resistance to abrasion and wear
-Clear, does not contain particles.
Less resistant to abrasion and wear.
-May not require occlusal adjustment after placement, so provides an advantage for school and community health programs where sealants are placed.
unfilled
type of filler:
Purpose: to enhance caries resistance.
Action: remineralization of incipient caries at the base of the pit or fissure.
flouride releasing
Classification of fillers by Color
clear, tinted, and opaque.
Individual patient benefit of sealants will depend on the following:
-Health, diet, and lifestyle.
-Age of tooth and past caries experience.
-Tooth anatomy.
The following risk factors will lead to an increased risk of dental caries:
-Xerostomia: from medications or other reasons.
-orthodontic patient
-Incipient pit and fissure caries (limited to the enamel) with NO radiographic evidence of caries on an adjacent proximal surface.
-Low socioeconomic status.
-Diet high in sugars.
-Inadequate daily oral health care.
place sealant as soon as the tooth is ________
fully erupted
Contraindications for Sealant Placement
-Radiographic evidence of adjacent proximal dental caries.
-Pit and fissures are well coalesced and self-cleansing; low caries risk.
-Tooth not completely erupted.
-Primary tooth near exfoliation.
A pit or fissure may contain the following:
-Dental biofilm, pellicle, debris.
-Rarely but possibly intact remnants of tooth development.