Moisture Control

Question 1

High Volume Evacuator

Answer 1

A type of the oral evacuator system is high volume evacuator HVE.

HVE is used for most dental procedures especially when dental hand-piece in use.

HVE does following
- keeps the mouth free of saliva, blood, water, and debris.

• Retracts the tongue and cheek from field of operation
• Reduces bacterial aerosol caused by the high speed hand-piece.

Question 2

Positioning the HVE

Answer 2

The dental assistant should position the HVE colse to the handpiece to catch spray and debris before they collect int the patient’s mouth.

• place the evacuator prior to dentist positioning the handpiece and mouth mirror.
• Position the HVE on the surface of the tooth closest to you
• position the tip as close as possible o the tooth being prepared

-position the bevel of the HVE so that it is parallel to the tooth surface.

-keep the edge of the tip even or slightly beyond the occlusal or incisal edge.

Question 3

Positioning the HVE

Answer 3

• Maxillary right posterior region
• maxillary left posterior region
• maxillary anterior region
  -mandibular right posterior region
• mandibular left posterior region
  -mandibular anterior facial region
• mandibular anterior ligual region

Question 4

Saliva ejector

Answer 4

Saliva ejector function is to remove liquids from the mouth. It is not poerful to remove debris.

Saliva ejector made of soft plastic tubling like small straw

indications used are
- prevention procedures such as florid treatment, and sealant placement
- controlling saliva under the dental dam
- othodontic bondind procedures

Question 5

Timing the used of the HVE

Answer 5

when suction is needed?
when HVE is positioned?
when to remove the suction tip?

Question 6

Placement of the saliva ejector

Answer 6

-bend and shape the saliva ejector for stationary placement.

• position the ejector under the tongue
• position he ejector the side on which the dentist is working

-Hold the saliva ejector throughout the procedure, sweeping the mouth to remove fluids,

Question 7

The air water syringe

Answer 7

-use to complete the rinsing process.
-The air water syringe increase
-the visibility of the treatment area
- use it before dismissal

The air water syringe do the following
- direct the tip toward the tooth being worked on
- maintain a close distance between the operative site and the syringe tip.
- use air on the mouth mirror
- when you hear the handpiece stop, it time to rise and dry the site.
- when completing a limited area or full mouth rinse, move the tip while spraying the area.

Question 8

Rinsing the oral cavity

Answer 8

• Limited area rinsing
• performed frequently throughout a procedure.
• Accomplished quickly and efficiently.

Full mouth Rinsing:
* freshens the patient’s entire mouth
*complete at the end of the procedure.

Question 9

Islation of teeth

Answer 9

To obtain the best results from the dental procedure the are being treated should be kept dry and isolated from the environment.

Isolation techniques should
- Be easy to apply
- be safe for soft and hard tissues
- be comfortable for the patient
- provide retraction for better visualization for operator.
-prevent moisture contamination
-Isolate the area of concern

WHY isolation so important? for the area ir tooth treated should be kept free from blood, saliva to help prevent infection from failed restoration

WHAT are THREE most common isolation technique used in dentistry?
- cotton-roll isolation
- Dry angle isolation
- dental dam placement

Question 10

cotton-roll isolation

Answer 10

a common type
advantages are
- easy to apply
- require no additional equipment

disadvantages of cotton-roll isolation
- does not provide complete isolation
- does not protect the patients from aspiration
- can stick to he oral mucosa
-must be replaced frequently because of saturation
-provides only limited retraction

Placement in the maxillary arch and placement in the mandibular arch.

Question 11

Dry angle isolation

Answer 11

-it blocks the flow of saliva
-protects the issues in this area from injury caused by the dental bur or other instruments.

• Dry angle isolation pads can become soaked and might need to be replaced several time.
• Dry angle isolation can easily be removed after soaking it with water and separating it from the tissue.

Question 12

Dental dams

Answer 12

A thin latex materials (stretchable) that acts as a barrier when applied to selected teeth.

dental dam keeps debris from the treatments area away from the rest of the mouth.

• the dam is placed after the local anesthesia is administered and before the procedure begin.
• dental dam can be placed in about 2 minutes.

Facts: using dam on a patients who is allergic to latex. YOU might need to use a dam that is latex free.

• Provides infection control
• safeguards the patient’s
• protects the patient from accidental inhalation or swallowing of debris
• protects the tooth from contamination
• provides moisture control
• improves access
• improves visibility
• increases dental team efficiency.

Question 13

Dental dam materials

Answer 13

*Dental dam materials come in different thicknesses; thin, medium, and heavy.

*thin or light dental dam materials are typically used in endodontic applications because only one tooth is isolates at a time.

• medium thickness materials are used in operative procedures.
• heavy materials are used when tissue retraction and extra resistance to tearing are required.
• heavier dams are also used to isolate teeth with tight contracts

Dental dam materials are available in the following ways
- latex or latex free
- size 6x6 inches for adults and 5x5 inches for children
- wide range of colors, from light to dark from light to dark
- dentists preferred by dentists because they provide a contrast with tooth
-In various scents and flavors

Question 14

Dental Dam frame

Answer 14

dental dam frame is necessary for a Dental Dam frame. Dental Dam frame a plastic or metal that can be sterilized. dental dam is stretched around the frame, help to keep the dam out of the operator;s work area

Three common types if frames
- plastic U shape frame: placed under the dental dam material

• Young frame: placed on the outside of the dental dam. patients more comfortable wit this one.
• otsby frame: round plastic frame is placed outside of the dental dam. outer portion of the frame.

Question 15

Denatl dam equipemnt

Answer 15

Dental dam napkin is cloth absorbent material placed between the patient’s face and the dental dam materials.

Question 16

dental dam stamp

Answer 16

helpful of equipment when using a dental dam. The dental stamp and inkpad are used to imprint the denal dam markings for the average adult and pediatric arches.

Question 17

dental dam punch

Answer 17

piece that helpful when using a dental dam is dental dam punch.

dental dam punch is a instruments that creates holes in the dental dam that are needed to expose the teeth to be isolated. dental dam punch used to
create a holes.

• mandibular incisors =1 hole
• maxillary incisors= 2 holes
• mandibular and maxillary premolars and canines= 3 holes
• mandibular molars= 4holes
  -maxillary molars and anchor tooth 5 holes.

Question 18

Dental dam forceos

Answer 18

Dental dam forceps: used to place and remove dental dam clamps.

using dental dam forceos is not difficult.

after squeezing the spring action forceps,

Question 19

Types of dental dam clamps

Answer 19

posterior clamps: are universal and used on the same tooth in the opposite quadrant. Posterior clamps are for maxillary and mandibular posterior teeth.

Anterior clamps: are designed to retract facial surface gingiva to help visibility for class V restorations.

winged clamps: have ecxensions to help retain the dental dam.

Question 20

Dental ligature

Answer 20

important safety measure that makes it possible to retriever a clamp should it accidentally become dislodged and then inhaled or swallowed by the patient.

dental dam stabilizing cord can be a simple piece of the dental floss or dental tape

Question 21

Preparing and placing a dental dam

Answer 21

• dental dam equipment and supplies are readied
• area of mouth is examined for placement
• dam punched
• clam is clamp, ligated
• clamp is placed
• dam is placed
• frame is placed
• the dam is secured and inverted

Question 22

Dental Dam removal

Answer 22

• Remove any ligatures that are stabilizing the dam
• cut each hole with crown and bridge scissors, creating one slit
• position the forceps in the clamps
• remove the dam and frame as a unit
• evaluate the patient
• evaluate the dam

Question 23

An Alternative to dental dam use

Answer 23

An alternative to placing a full dental dam is quick dam.

Handi dam is an oval piece of dental dam that has a flexible plastic border with premarked template of teeth. Holes are punched in the same manner as a traditional dam.