Rubber Dams Flashcards
why do we isolate
material do not become contaminated, to maintain providing optimal curing
patients are protected from materials or injury from instrumentation
minimum requirements for isolation
teeth are exposed
teeth are dry
surrounding soft tissue is controlled and retracted from the operating site
ideal isolation
specific clinical crowns are isolated
soft tissue is retracted and controlled
moisture is completely controlled
optimum visibility is achieved
does not fall off during procedure
protects the patient from aspiration of material, or trauma from instruments
comfortable for patient
application and removal is easy and rapid
common types of isolation
cotton rolls
dri-angles
rubber dam
type of isolation depends on a number of factors
duration of procedure
degree of dryness required dental material
number of teeth involved
type of procedure
advantages of cotton roll and dri-angles
ease of speed and application
patient comfort
disadvantage of cotton rolls and dri-angles
provides limited retraction of soft tissue
risk of moisture contamination of the site and dental materials
necessity of changing cotton rolls frequently
no protection from aspiration
use of cotton rolls and dri-angles
best for short procedures
should use with saliva ejectors or high volume suction
placement of dri-angles
cotton toward cheek
usually triangle shaped, shortest side toward back
place over stensen duct
advantages of rubber dam
provides isolation of clinical crowns of specific teeth
prevents moisture contamination
increases visibility due to contrast
retracts soft tissue well
prevents aspiration of material
disadvantages of rubber dam
may be time consuming
may cause tissue trauma
may be uncomfortable
claustrophobic
conditions that may prevent use of rubber dam
teeth that are partially erupted
badly malpositioned teeth
8’s are often too difficult to clamp
not enough teeth in the arch
fixed orthodontic appliances
if restoration is required in areas of recession
rubber dam clamp
anchor the dam
placement: contacts the tooth at 4 points of the clamp, feels stable when rocked from side to side, does not impinge unnecessarily on hard or soft tissue
what should you do with rubber dam clamp
always ligate the clamp with dental floss
rubber dam maximum isolation
on posterior sextant: Q + 3, or from a molar to the canine of opposite side
clamp one tooth posterior to the one being working on
on anterior sextant: from 1st premolar to 1st premolar
