Posterior teeth
All pit and fissure restorations
They are assigned in to three groups. R. on occlusal surface of premolars and molars
R. in foramina coeca - usually on occlusal two thirds of the facial and linqual surfaces of molars.
R.on lingual surface of maxillary incisors
Longevity of fillings
Indications
Moderate to large restorations
Restorations that are not in highly aesthetics areas
Restorations that have heavy occlusal contacts
Restorations that cannot be well isolated
Restorations that extend onto the root surface
Foundations
Abutmjent teeth for removable partioal dentures Temporary or caries control restorations.
Contraindications
□ Aesthetically prominent areas of posterior teeth
(i Small moderate classes I. that can be well isolated
Materials: Amalgam, composite.
Amalgam: Pertinent material qualities and propeties
Strength Longevity Ease of use Clinically proven sucess
Clinical technique
□ From the occlusal surface using the fissure bur (or diamond burs, see below).
Outline
□ Ideal outline includes all occlusal pits and fissures. If crista transversa od obliqua are no affected, it is recommended not to prepare them.
Resistance principles
Keep the facial and lingual margin extensionsas minimal as possible between the central groove and the cusp tips.
Extending the outline to include fissures, thereby placing the margins on relatively smooth sopund tooth structure.
Minimally extending into the marginal ridge without removing dentinal support.
Eliminating a weak wall of enamel by joining teo outlines that come close together
Enamel.
- Nevel leave the enamel undermined All corners are round, the bottom smooth.
Retention principles
□ Prepare the box - the bottom is in dentin
n Undercuts can be prepared, the proximal ridges must not be weakened!
Removal of carious, infected, dentin and remaining defective
enamel.
J Spoon excavator or a slowly revolving , round carbid bur of appropriate size.
Indications
Aesthetically prominent areas of posterior teeth
n Small - moderate classes I. that can be well isolated
n Good level of oral hygiene is necessary
Contraindications
Moderate to large restorations Restorations that are not in highly aesthetics areas Restorations that have heavy occlusal contacts Restorations that cannot be well isolated Restorations that extend onto the root surface Abutment teeth for removable partioal dentures Temporary or caries control restorations.
Clinical technique
□ From the occlusal surface using the fissure bur (or diamond burs)
Outline
□ Outline includes the caries lesion only n Surrounding fissures open and seal
Retention principles
■ Prepare the box or deep dish - the bottom is in dentin
n Do not prepare any undercuts!
li Do not bevel enamel, finish the border with diamond bur inly.
Removal of carious, infected, dentin and remaining defective
enamel.
J Spoon excavator or a slowly revolving , round carbid bur of appropriate size.
Versluis 2000
Placement of the material with respect to C-factor of each layer
Forces of polymerization shrinkage
depend on
- Mode of polymerization Phases
- Pre-gel
- G-point
- Post-gel
Light
A
Polymerization
Monomer-► Polymer
f )>
O
Pre gel phase should be long - soft start!!!!
Flow materiály - vvznam
1. Vyrovnání zateze
(protistresové vlastnosti)
2. Vyblokování podsekřivin
3. Adaptace ke stěnám
4. Estetické důvody
5. Ochrana adheziva
Temperovaný kompozit
Adhesives
□ Acid etching technique
□ Selfetching adhesive systems
Adhesives
□ Acid etching technique
Etching Washing Priming Bonding
Adhesives
□ Selfetching adhesive systems
Priming Bonding
Adhesives
□ Active and passive bonding
Active - rubbing with microbrush Passive - without any rubbing
Adhesive preparation in a fissure
Adhesive preparation
Preparation of enamel borders
Kompozitní výplň II. třídy
Interproximální vertikální okraje
Preparační technika
Filling and Caries Excavation
Proximal Preparation with _SonicS y s_
Final Preparation of Cavity
Approximal Caries
Approximal Caries
Adhezivní slotová preparace
Úspěch tunelu????
1. Lupové brýle nebo mikroskop
2. Miniaturní instrumenty
3. Dezinfekce kavity
4. Jedině GIC v kapslích
5. BW post op
Úspěch tunelu????
Nízké riziko sklonu k novým kazům Spolupracující pacient Okrajová lišta bez infrakcí D2-D3
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