lenka.roubalikova@ti
scali.cz
1
Classification acc. to Black
 Class I.
Pit and fissure caries
lenka.roubalikova@ti
scali.cz
2
Classification acc. to Black
 Class II.
Proximal surfaces in premolars and molars
lenka.roubalikova@ti
scali.cz
3
Classification acc. to Black
 Class III.
Proximal surfaces of incisors and canines
without
lost an incisal ridge
lenka.roubalikova@ti
scali.cz
4
Classification acc. to Black
 Class IV.
Proximal surfaces of incisors and canines with
lost an incisal ridge
lenka.roubalikova@ti
scali.cz
5
Classification acc. to Black
 Class V. cervical lesions
lenka.roubalikova@ti
scali.cz
6
Basic rules preparation
of cavities
Access to the cavity
Outlines – cavosurface margin (extention for
prevention)
Retention
Resistance
Excavation of carious dentin
Preparation of borders – finishing
Control
lenka.roubalikova@ti
scali.cz
7
lenka.roubalikova@ti
scali.cz
8
lenka.roubalikova@ti
scali.cz
9
lenka.roubalikova@ti
scali.cz
10
lenka.roubalikova@ti
scali.cz
11
Úprava sklovinných stěn
lenka.roubalikova@ti
scali.cz
12
lenka.roubalikova@ti
scali.cz
13
lenka.roubalikova@ti
scali.cz
14
lenka.roubalikova@ti
scali.cz
15
lenka.roubalikova@ti
scali.cz
16
Protection of dentin wound
 Dentin wound – open dentin tubules –
movement of dentinal liquor – hydrodynamic
effect.
Phycial rasons
-thermal
-osmotic
Chemical reasons
Combination
lenka.roubalikova@ti
scali.cz
17
Protection of dentin wound
Isolation
Base
Lining
Subbase
Adhesive systems (explanatiom later)
lenka.roubalikova@ti
scali.cz
18
Making fillings
 Filling replaces lost hard dentalů tissue
anatomically and functionally
 Always different properties in comparison
to hard dental tissues.
lenka.roubalikova@ti
scali.cz
19
lenka.roubalikova@ti
scali.cz
20
Lining
lenka.roubalikova@ti
scali.cz
21
Base
Preparation of the cavity I.st
class acc. to Black
 Cavities in fissures and pits
 (Occlusal surfaces of premolars and
molars and in f. coeca)
F. Coeca: buccal surfaces of lower
molars,
Palatal surfaces of lower molars, palatal
surfaces od canines.
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 lingual surfaces of molars.
R.on lingual surface of maxillary incisors.
Materials: Amalgam, composite.
Amalgam:
Pertinent material qualities and propeties
Strength
Longevity
Ease of use
Clinically proven sucess
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
 Small moderate classes I. that can be
well isolated
Access to the cavity
 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 no to prepare them.
Cavosurface margin
All fissures in contact with caries lesion
Kavita sahá do ½ úbočí hrbolků
Zachování crista obliqua
6 7 8
6 7 8
Kavity na molárech
Kavity na premolárech Zachování crista transversa
Retention principles
 Prepare the box – the bottom is in
dentin
 Undercuts can be prepared, the
proximal ridges must not be weakened!
Retention principles
 Box in dentin
Resistance principles
 Box – space for amalgam 1,5 – 2 mm
 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 sound tooth
structure.
 Minimally extending into the marginal ridge without
removing dentinal support.
 Never leave the enamel undermined
 All corners are round, the bottom smooth.
Removal of carious,
infected, dentin and
remaining defective
enamel.
 Spoon excavator or a slowly revolving ,
round carbid bur of appropriate size.
The pulpal wall and pulp chamber
Correct direction of the bur
Finishing and polishing
 Fine grit diamond bur.
Preparation of borders and
final check
Smoothen (red coced diamond)
20.000 rpm.
F.Coecum
Preparation islimited on carious lesion only
undercts
Combination of
Cavity in f.coecum
and occlusal cavity
Preparation for composit
Cavity is limited on the carious lesion
It has a form of deeper dish
No undercuts
More single cavities can be prepared
lenka.roubalikova@tisc
ali.cz
54
Minikavity
Otevírání fissur
lenka.roubalikova@tisc
ali.cz
55
Preparation for inlay
 Inlay is a rigid filling
 It is fabricated out of oral cavity in dental
lab
 It is luted into the cavity using luting
material -cement
 Preparation is different – the walls are
divergent
For inlay
For amalgam
For composit