Restorative procedures require adequate isolation of the operating field for best results.
A clean and dry field is comfortable both for the patient and the operator.
It provides better access and visibility, improving the efficiency of the operator.
The properties of many dental materials are improved in the absence of moisture.
Isolation collects the materials from operating site and also prevents their aspiration.
Isolation also often permits the dentist to carry out extended operations if desired.
Goals of isolation:
Moisture control
Retraction and access
Harm prevention . Safe and aseptic operating field
Prevent accidental swallowing of restorative materials and instruments
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
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A RPD derives support from two main sources periodontally sound natural teeth & residual alveolar processes and associated soft tissues.
A RPD that is supported by healthy natural teeth possesses adequate stability and retention to resist functional displacement.
However, a RPD that is not entirely bounded by natural teeth will move when a load is applied.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.
A RPD derives support from two main sources periodontally sound natural teeth & residual alveolar processes and associated soft tissues.
A RPD that is supported by healthy natural teeth possesses adequate stability and retention to resist functional displacement.
However, a RPD that is not entirely bounded by natural teeth will move when a load is applied.
Isolation of operating field/ orthodontic course by indian dental academyIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Success of any dental procedure is determined by a good isolation. Here is a seminar on how to isolate the oral cavity from fluids and maintain a good dry field while working on a patient
This topic very important during restoring tooth (ex. CL II), to prevent excess materials and provide good contact and smooth surface...
Also help during diagnosis of proximal carie...
In dentistry, separation of a tooth or group of teeth from oral tissues and saliva by use of a dental dam, cotton rolls, or other means to improve access, visibility, and control moisture contamination while restorative or operative dental procedures are performed.
Isolation of the operating field / certified fixed orthodontic courses by In...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.
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Mineral trioxide aggregate, described in 1993, is an aggregate of mineral oxides added to “trioxides” of tricalcium silicate, tricalcium aluminate, and tricalcium oxide silicate oxide.
It was patented by Mahmoud Torabinejad and Dean White, and described it as the tooth filling material comprising of Portland cement ( TYPE 1)
hydraulic type of cement
Biodentine, a tricalcium silicate based dental material was introduced by Septodont in the year 2010known as “dentine in a capsule”
The product was synthesized de novo and was free from the impurities present in the derivatives of portland cement like MTA.
It helps in achieving biomimetic mineralisation within the depths of a carious cavity
Endodontic emergencies and mid term flare upsDR POOJA
An endodontic emergency is defined as pain and/or swelling caused by inflammation or infection of pulp and/or periradicular tissue necessitating an emergency visit to the dentist for immediate treatment.
The main causative factors responsible for occurrence of endodontic emergencies are:
Pathosis in pulp and periradicular tissues
Traumatic injuries
Recent studies report a 60-82% incidence of endodontic emergencies among all dental emergencies.
Within this group, 20-42% of patients seek care for teeth with symptomatic irreversible pulpitis (SIP) .
Additionally, about 60% of SIP patients also complain of symptomatic apical periodontitis (SAP)
The goal of management of endodontic emergencies is to quickly and effectively manage pain and infections thereby also minimizing the development of persistent pain and the formation of periapical pathology.
Microorganisms cause virtually all pathoses of the pulp and periapical tissues.
Once bacterial invasion of pulp tissues has taken place, both non-specific inflammation and specific immunologic response of the host have a profound effect on the progress of the disease.
Endodontic infection develops in root canals devoid of host defenses,
pulp necrosis (as a sequel to caries, trauma, periodontal disease,or iatrogenic operative procedures)
or pulp removal for treatment.
Biofilm-induced oral diseases.
ROUTES OF ROOT CANAL INFECTION
Caries
• Trauma-induced fractures
• Cracks
• Restorative procedures
• Scaling and root planing
• Attrition
• Abrasion
• Gaps in the cementoenamel junction
at the cervical root surface
• Dentinal tubules
• Direct pulp exposure
• Periodontal disease
• Anachoresis
Mechanisms of Microbial Pathogenicity and Virulence Factors
Pathogenicity : The ability of a microorganism to cause disease.
Virulence: Degree of pathogenicity of a microorganism.
Some microorganisms routinely cause disease in a given host and are called primary pathogens.
Other microorganisms cause disease only when host defenses are impaired and are called opportunistic pathogens by changing the balance of the host–bacteria relationship.
Bacterial strategies that contribute to pathogenicity include the ability to coaggregate and form biofilms.
In the pathogenesis of primary apical periodontitis
Bacteria in caries lesions form authentic biofilms adhered to dentin.
Diffusion of bacterial products through dentinal tubules induces pulpal inflammation
After pulp exposure, the exposed pulp tissue is in direct contact with bacteria and their products
and responds with severe inflammation. Some tissue invasion by bacteria may also occur.
Bacteria in the battlefront have to survive the attack from the host defenses and at the same time acquire nutrients to keep themselves alive.
In this bacteria–pulp clash, the latter invariably is “defeated” and becomes necrotic, so bacteria move forward and “occupy the territory”—that is, they colonize the necrotic tissue.
These events advance through tissue compartments, coalesce, and move toward the apical part of the canal until virtually the entire root canal is necrotic and infected.
At this stage, involved bacteria can be regarded as the early root canal colonizers or pioneer species (play an important role in the initiation of the apical periodontitis disease process, modify the environment, making it conducive to the establishment of other bacterial groups)
General anaesthetics (GAs) are drugs which produce reversible loss of all sensation and consciousness.
The cardinal features of general anaesthesia are:
• Loss of all sensation, especially pain.
• Sleep (unconsciousness) and amnesia
• Immobility and muscle relaxation
• Abolition of somatic and autonomic reflexes.
GA was absent until the mid 1800’s
Original discoverer of GA
-Crawford long, physician from Gerogia(1842),
ETHER ANESTHESIA
. NITROUS OXIDE
- Horace wells(1844)
. GASEOUS ETHER by William T.G. Morton(1846)
. CHLOROFORM introduced by
- James simpson (1847)
METHODS OF ADMINISTRATION OF INHALATIONAL GENERAL ANAESTHETICS
OPEN METHOD: This is a simple method of administering a volatile anaesthetic.
A simple mask covered with six to ten layers of gauze, which does not fit the contour of the face is held on the face and an anaesthetic like ether, or ethyl chloride is poured on it in drops. The anaesthetic vapour, diluted with air, is inhaled through the gap between the mask and the face.
SEMI-OPEN METHOD: This method is similar to open method but the dilution with air is prevented by using either a well-fitting mask like Ogston’s mask or layers of gauze between face and the mask. A small carbon dioxide build-up occurs with this method.
SEMI-CLOSED METHOD: This method allows some rebreathing of the anaesthetic drug with the help of a reservoir but in addition, part of the volume of each succeeding inspiration is a new portion from an anaesthetic mixture. This method involves accumulation and rebreathing of carbon dioxide.
• CLOSED METHOD: This method employs the chemical agent soda lime to absorb the carbon dioxide present in the expired air. It requires the use of a special apparatus but is particularly useful when the anaesthetic agent is potentially explosive
STAGES OF ANAESTHESIA
Guedel, in 1920 outlined the four stages of general anaesthesia :
• Stage I: Stage of analgesia
• Stage II: Stage of delirium
• Stage III: Stage of surgical anaesthesia
• Stage IV: Stage of respiratory paralysis
Inadequate anaesthesia is indicated by:
Signs of ANS overactivity, such as tachycardia, rise of BP, sweating and lacrimation.
Grimacing;
Other muscle activity.
Surgical anaesthesia is indicated by:
Loss of eyelash (lid) reflex
Development of rhythmic respiration.
Deep anaesthesia is suggested by :
Depression of respiration.
Hypotension
Asystole
Temporomandibular joint anatomy and functionDR POOJA
diarthrodial joint
The masticatory system is the functional unit of the body primarily responsible for chewing, speaking and swallowing. Components also play a major role in tasting and breathing.
The system is made up of bones, joints, ligaments, teeth and muscles.
In addition ,there is an intricate neurologic controlling system that regulates and coordinates all these structural components.
The Temporomandibular joint (TMJ) is formed by the articulation between the articular eminence and the anterior part of the glenoid fossa of the squamous part of temporal bone above and the condylar head of the mandible below.
The TMJ contains a fibrous intraarticular disk that is interposed between the articular surface and functions as a shock absorber.
The TMJ is a compound joint that can be classified by anatomic type as well as by function.
Anatomically the TMJ is a diarthrodial joint, which is a discontinuous articulation of two bones permitting freedom of movement that is dictated by associated muscles and limited by ligaments.
It is also a synovial joint, lined on its inner aspect by a synovial membrane, which secretes synovial fluid. The fluid acts as a joint lubricant and supplies the metabolic and nutritional needs of the non-vascularized internal joint structures.
Functionally the TMJ is a compound joint, composed of four articulating surfaces:
articular facets of the temporal bone
articular facets of the mandibular condyle
superior surface of the articular disk
inferior surface of the articular disk.
The articular disk divides the joint into two compartments. The lower compartment permits hinge motion or rotation and hence is termed ginglymoid.
The superior compartment permits sliding (or translatory) movements and is therefore called arthrodial. Hence the temporomandibular joint as a whole can be termed ginglymoarthrodial.
SYNONYMS
Craniomandibular joint/ articulation
Mandibular joint
Bicondylar joint
Modified ball and socket joint
Compound joint
Diarthroidal joint
oral mucosa
The term mucous membrane is used to describe the moist lining of the gastrointestinal tract, nasal passages, and other body cavities that communicate with the exterior. In the oral cavity this lining is referred to as the oral mucous membrane, or oral mucosa. At the lips the oral mucosa is continuous with the skin; at the pharynx the oral mucosa is continuous with the mucosa lining the rest of the gut. Thus the oral mucosa is located anatomically between skin and gastrointestinal mucosa and shows some of the properties of each.
CLASSIFICATION
The classification based on these functional criteria, divides the oral mucosa into three major types:
1. Masticatory mucosa 25% (gingiva and hard palate)
2. Lining or reflecting mucosa 60% (lip, cheek, vestibular fornix, alveolar mucosa, floor of mouth and soft palate)
3. Specialized mucosa 10% (dorsum of the tongue and taste buds)
Based on keratinization:
KERATINIZED MUCOSA—
MASTICATORY MUCOSA
VERMILLION BORDER OF LIPS
NON KERATINIZED MUCOSA–
LINING MUCOSA
SPECIALIZED MUCOSA
DEVELOPMENT OF ORAL MUCOSA
The epithelium of the oral cavity is derived from both the ectoderm and the endoderm. The anterior part of the oral cavity is lined by the epithelium derived from the ectoderm.
By 13–20 weeks differences between keratinized and nonkeratinized mucosa becomes apparent. Keratohyaline granules in the keratinized mucosa and region specific cytokeratin appear.
Lingual papillae appear early at about 7th week; the circumvallate and foliate papillae appear earlier than filiform papillae, which can be recognized by 10–12 weeks.
FUNCTIONS OF ORAL MUCOSA
DEFENSE
1.Effective barrier for the entry of the microorganisms.
2.The oral mucosa is impermeable to bacterial toxins. It also secretes antibodies and has an efficient humoral and cell mediated immunity.
LUBRICATION
The secretion of salivary glands keeps the oral cavity moist and thus prevents the mucosa from drying and cracking thereby ensuring an intact oral epithelium.
A moist oral cavity helps in speech, mastication, swallowing and in the perception of taste.
SENSORY
The oral mucosa is sensitive to touch, pressure, pain and temperature.
The sensation of taste is a unique sensation, felt only in the anterior 2/3rd of the dorsum of the tongue.
Swallowing, gagging, retching and salivating reflexes are initiated by receptors in the oral mucosa.
Touch sensations in the soft palate results in gag reflex
PROTECTION
The oral mucosa protects the deeper tissues from mechanical forces resulting from mastication and from abrasive nature of foodstuffs.
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3. Introduction
Restorative procedures require adequate
isolation of the operating field for best results.
A clean and dry field is comfortable both for
the patient and the operator.
It provides better access and visibility,
improving the efficiency of the operator.
The properties of many dental materials are
improved in the absence of moisture.
4. Isolation collects the materials
from operating site and also
prevents their aspiration.
Isolation also often permits the
dentist to carry out extended
operations if desired.
6. Advantages of isolation Patient related
A. Provides comfort
B. Protect from swallowing or aspirating foreign
bodies
C. Protect soft tissues by retracting them
7. Operator
related
A. dry clean
operative field
B. Infection
control
C. Increased
accessibility to
operative site
D. Improved
properties of
restorative
materials
E. Improved
visibility & less
fogging of
mirror
F. Prevents
contamination
of tooth
preparation
sturdevant
8. Methods of isolation
Direct method
Mouth
mirror
Mouth
props
Gingival
retraction
cords
Suction
devices
Gauze
piece
Dri-angle
Cotton
rolls &
cellulose
wafers
Rubber
dam
sturdevant
9. Rubber dam
One of the most effective means of isolating teeth
Developed by SC Barnum in 1864
10. Advantages
of rubber dam
Increases visibility & accessibility
Provides a dry field
Effectively retracts tongue, cheeks away from the field of
operation
Reduces the chances of injury to soft tissues
Protects against bad taste of the materials used
Prevents any aspiration or ingestion of dental instruments
11. Disadvantages
of rubber dam
Takes time to be applied
Communication with the patient can be
difficult
Incorrect use may damage porcelain
crowns/gingival tissues
Insecure clamps can be swallowed or aspirated
12. Contraindications
child with upper respiratory tract infection, congestion of
nasal passage or nasal obstruction
Presence of some fixed orthodontic appliances
recently erupted tooth
Patients with allergy to latex
grossly carious teeth
14. Rubber dam
sheet
Made of latex or non-latex.
Available in 2 sizes-
❶ 5”*5”
❷ 6”*6”
Available in varying thickness
Thin – 0.15 mm
Medium – 0.20 mm
Heavy – 0.25 mm
Extra-heavy – 0.30 mm Special
heavy – 0.35mm
Light and dark sheets are available,
may be flavored for the children
Has a shiny and dull surface, dull side
will be facing the occlusal side
sturdevant
15. Rubber dam
template
Have positions of the teeth marked on them and
are used to transfer them to the rubber dam sheet
for holes to be punched
16. Rubber
dam
punch
Used to make the holes in the sheet through
which the teeth can be isolated
Has a rotating metal disk with 5 to 6 holes of
varying sizes.
The plunger must always be centered in the
cutting hole in order to create a clean cut.
2 types of punch design available:
1) Single hole punch
2) Multi-hole punch
a. Ash or Ainsworth pattern
b. Ivory pattern
17.
18. Common hole
placement
problems
Holes punched too
close together –
holes pull away
from teeth causing
leakage
01
Holes punched too
far apart– dam
bunches up
between teeth
02
Holes position too
low on the dam –
dam covers
patient’s eyes or
nose
03
Holes position too
high on dam – dam
does not extend
over upper lip
04
sturdevant
19. Rubber dam clamps
Made of shiny & dull stainless steel
consists of
4 prongs , 2 jaws , 1 bow
Aid in anchoring the dam to the tooth & in
soft tissue retraction
2 types :
Winged
Wingless
20.
21. CLAMP
SELECTION
Select a clamp that will maintain four-point
contact with the tooth’s proximal surfaces.
• If a clamp is too large, it will impinge on the
soft tissues.
• If it is too small, it will not properly grasp the
tooth’s surface, and will be unstable.
sturdevant
23. Anterior teeth
A small group of clamps
have two bows ,one on each
end of the jaw, and due to
their shape is called butterfly
clamps
Butterfly clamps
24.
25.
26. Bland
and retentive
clamps
Bland clamps have jaws which are flat, directed
towards each other.They grasp the tooth at or above
the gingival margin & cause minimal gingival damage.
Retentive clamps have jaws directed more gingivaly
and grasp the teeth below the gingival margin.
Both bland and retentive can be further sub divided
into winged and wingless type
27. CERVICAL RETRACTINGCLAMP
These can be single bowed or double bowed but
the jaws with their blades are movable even after
attaching the clamp to the tooth.
By moving the blade apically the gingiva can be
retracted apically.
•Disadvantages of Brinker’s tissue retractors
•These have little gripping power and so retention
are provided mainly by impression compound.
•They have limited life.
28. CLAMPS
WITH LONG
GUARD
EXTENSION
These retract and protect the cheek and tongue .
Some of them have tube like perforated
extensions which hold cotton roll in the sulci.
29. Specialized
Clamps
The Dentsply HW pattern or the Ash AD
patterns are special clamps (extended bow
clamps) in which the bow lies more distally
than that of a standard clamp.
This is especially helpful if the preparation
of the distal surface of a clamped tooth is
necessary.
30. S-G (SILKER-
GLICKMAN )
CLAMP
Anterior extension in this clamp allows for
retraction of dam around severely broken down teeth
while the clamp itself is placed on a tooth proximal to
one being treated.
31. RUBBER
DAM
FORCEPS
Forceps are needed to stretch the jaws of the clamp open
in a controlled manner during placement and removal.
•Three widely used designs are:
Ash or stokes pattern
Ivory pattern
Washington pattern
32. It has notches near the tips of their beaks in which
to locate the holes of a rubber dam clamp.
It allows a range of rotation for the clamp so that it
may be positioned on teeth that are mesially or
distally angled.
It has stabilizers that prevent the clamp
from rotating on the beaks.
It limits the use of these forceps to teeth
that are within a range of normal
angulation.
Ash-or- Stokes Pattern Ivory Pattern
34. RUBBER
DAM FRAME
Maintains borders of rubber dam in position
Supports edges of rubber dam sheet.
Retracts soft tissues
Improves access
Two types:
1. Plastic 2. Stainless steel
sturdevant
37. It is composed ofTwo hinged
frames members whose snap sheet
locking mechanism securely clamp
the rubber dam sheet in place.
Offers a secure
fit without stretching the rubber
dam sheet.
Held in this manner the dam sheet
is a under less tension, and hence
exerts less tugging on clamp.
SafeT Frame
38. Quick dam
Comes with an attached flexible plastic
frame or rim that supports dam intraorally.
Effective in saliva control anterior part of
the mouth than posterior part .
Has a pliable plastic frame around
perimeter of the rubber dam
Instidam (Zirc company)
Simple & effective isolation system.
It is a pre punched rubber dam mounted
on a frame .
Compact design fits outside patient lips
39. DENTAL FLOSS
• Required for testing the interdental contacts and for making ligatures when they
are needed.
• Also aid in flossing the rubber dam through tight contacts.
RUBBER DAM WEDJETS
• This is an elastic cord generally used to secure the dam around the teeth
farthest from the clamp.
• It can also be used to push the dam through the interproximal contact and also
in some places as a retainer instead of clamp.
MODELLING COMPOUND
• Low fusing modelling compound is used sometimes to secure the retainer to
the tooth to prevent retainer movement during the operative procedure.
sturdevant
40. RUBBER DAM NAPKIN
It is a disposable paper which is placed between the patients skin and
the rubber dam sheet.
Uses:
a) Prevents contact of rubber dam sheet to the skin thus preventing any
possible allergic reaction.
b) It absorbs saliva seeping through the corners of the mouth.
c) It acts as a cushion.
LUBRICANT
In the area of the punched holes facilitates the passing of the dam
through the proximal contacts. Dam lubricants are commercially
available but other lubricants such as soap slurry are also satisfactory.
Petroleum based lubricants should be avoided with rubber dam as they
are difficult to remove after application and can impede bonding
procedures and make inversion of dam difficult, & so a water soluble
lubricant is preferred.
Petroleum jelly is often used at the corners of the patients mouth to
prevent irritation
sturdevant
54. Assistant’s hands position
the dam directly around the
tooth to be treated
Dam FirstTechnique
Finger tip is introduced in
the dam opening to better
illustrate the patient,the
functions of this rubber
sheet
The dentist positions the
clamp.
With assistance dentist
positions Young’s frame
56. Clamp And DamTogetherTechnique
Rubber sheet is punched
with a rubber dam punch
Rubber dam is stretched over
the wings of selected clamp
Dam & clamp placed in
position in patient’s mouth,
with the help of an assistant
Young’s frame is positioned
to produce tension in the dam
Using an instrument dam is
slipped beneath the clamp wings
57.
58. Cutting the Septa Removing the Retainer
Removal of
rubber dam
sturdevant
60. Rinsing the Mouth and
Massaging theTissue
Examining the
Rubber dam
sturdevant
61. Cleaning –
o Clamps should be rinsed & cleaned immediately after the procedure
o Failure to clean will decrease the life of the clamp & can result in staining & corroding
o Rinse & remove excess material before ultrasonic cleaning
o Allow clamps to dry
Sterilization –
o Important to remove excess restorative material from the clamp before sterilization as it may damage
the clamp
o Autoclave – 15 min at 130°C/266°F •
Inspection –
o Inspect the clamp for wear, distortion or damage.
o Discard if distorted
Cleaning of clamps after use
62. Errors in application & removal of rubber dam
Off center arch form
May not adequately shield the patient’s
oral cavity, allowing foreign matter to
escape down patient’s throat
May result in an excess dam material
superiorly that may occlude patient’s
nasal airway
Superior border of dam may me folded
or cut from around patient’s nose
sturdevant
63. Inappropriate
retainer
May be :
Too small
resulting in
occasional
breakage when
the jaws are
overspread
Unstable on the
anchor tooth
Impinge on soft
tissues
An appropriate
retainer should
maintain a stable
four point
contact with the
anchor tooth
64. Incorrect
technique for
cutting the septa
Stretching the septa away from gingiva,
protecting the lip & cheek with an index finger,
using curved beak scissors decreases the risk
May result in cutting soft tissues or tearing of
septa
sturdevant
65. Retainer
pinched tissue
Jaws & prongs of the retainer
usually slightly depress the tissues
but should never pinch or impinge
on it
Shredded or
torn dam
care should be taken to prevent
tearing the dam during hole
punching or passing the septa
through contact
66. Cotton rolls & cellulose wafers
1
Available in
different
diameters, cut to
variant lengths &
have plain or
woven surfaces .
2
Stabilized & held
sublingually with
specific holders or
with an anchoring
rubber dam clamp
.
3
Can be applied
without holders,
over or lateral to
salivary gland
orifices .
4
Cellulose wafers
provide additional
absorbency
5
Advantage –
6
Slight retraction
of cheeks aiding in
visibility & access
7
Precaution:
8
Moisten the
cotton rolls &
cellulose wafers
while removing to
prevent
inadvertent
removal of
epithelium from
cheeks, floor of
mouth or lips
sturdevant
67. Gauze piece
or throat
shields
Indicated when there is danger
of aspirating or swallowing
small objects, when rubber
dam is not being used
Used in pieces of 2”x2” or
larger
Particularly important when
treating teeth in maxillary arch
Gauze sponge unfolded &
spread over the tongue&
posterior part of the mouth is
helpful in recovering a small
object should it be dropped
Advantage –
Better tolerated by delicate
tissues
Less adherence to dry tissues
compared to cotton
sturdevant
68. A thin, absorbent, cellulose triangle
Unique replacement on the cotton roll in the parotid
area
Covers the parotid or Stensen's duct and effectively
restricts the flow of saliva
Provides the required Dri-Field for
Composites
Bonding
Cementing
Comes in two types: plain and silver coated
Dri – angle
69. Saliva
ejector &
high volume
evacuating
equipment
Saliva ejector prevent pooling of saliva in the floor of the mouth
High volume evacuating equipment removes solid debris along
with water Saliva ejector High volume evacuator
Types of saliva ejectors :
Metallic –
Autoclavable
Rubber tip to avoid irritating delicate tissues on floor of the mouth
Plastic –
Disposable & inexpensive
Metallic saliva ejector Plastic saliva ejector
70. Requirements
Tip should always be molded to face backwards with a slight
upward curvature
Floor of the mouth under the tip should be covered with gauze to
prevent injury to soft tissues
Should not interfere with instrumentation
Advantages
Provides an adequate dry field
No dehydration of oral tissues
Precautions
Should be disinfected after each use
Child patient- cautioned not to close his mouth
sturdevant
71. Retraction cords
Used for isolation &
retraction in direct
procedures of treatment of
accessible sub gingival area
Diameter of cord should be
selected such that it is gently
inserted into gingival sulcus,
producing lateral
displacement of the free
gingiva without blanching
Cord may be moistened with
a non caustic styptic before
insertion (Hemodent)
72. Advantages –
May help restrict excessive
restorative materials from
entering the gingival sulcus
Provide better access for
contouring & finishing the
restorative material
Prevent abrasion of gingival
tissue during tooth
preparation
Used primarily to push the
gum tissue away from the
prepared margins of the
tooth, in order to create an
accurate impression of the
teeth
73. Mouth props
Can be potential aid for lengthy appointment on posterior teeth
Should maintain suitable mouth opening
Types – Block AND Ratchet
Block type Ratchet type
sturdevant
74.
Ideal characteristics-
Should be adaptable to all mouths
Should be easily positioned & removed with no patient discomfort
Should be stable once applied
Should be either sterilizable or disposable
Secondary function -- Helps to
retract cheeks, lip & tongue in the
absence of rubber dam
Mouth mirror
sturdevant
76. Conclusion
A thorough knowledge of the
preliminary procedures reduces the
physical strain on the dental team
associated with the daily dental
treatment, reduces patient’s anxiety
associated with dental procedures &
enhance moisture control thereby
improving the quality of operative
dentistry