LA techniques Flashcards
What adverse events can be caused by administering LA?
System toxicity Allergy Trismus Occular complications Non-surgical parathesia Interactions Methemoglobinemia
Definition of pain
An unpleasant sensory and emotional experience associated with, or resembling that associated with, actual, or potential tissue damage
What techniques are used for regional anasthesia?
Infiltration techniques
Block techniques
What is important to consider when choosing LA technique?
Bone density
where is LA solution deposited with infiltration techniques?
Around terminal branches of nerves
Where is LA solution deposited with block techniques?
beside nerve trunk
What are infiltration techniques used for?
Anaesthetising soft tissues
Pulpal anaesthesia where alveolar bone is thin
Where are infiltrations used?
Maxilla and lower anteriors
Where are blocks used?
Mandible (Where bone is too thick to allow infiltration)
What tissue anaethesia should be considered when anaesthetising for Tooth restoration?
Dental pulp
Matrix band/RD placement - soft tissues
Haemostatic management in fixed prosthodintic procedures - soft tissues
What tissue anaethesia should be considered when anaesthetising for XLA/surgical procedures?
Pulp, gingiva and surrounding soft tissue
What tissue anaethesia should be considered when anaesthetising for scaling?
Gingivae or gingivae and pulp
How is anaesthesia achieved in the maxilla?
Buccal inf. - anaesthesia of dental pulp & buccal ginigvae
Palatal injection - anaesthesia of palatal gingivae
In the mandible, how is anaethesia of the dental pulp achieved?
Lower molars (& 2nd premolars): IANB
Lower premolars: Mental (incisive) nerve block/ can be achieved w/infiltration
Lower canine & incisors: Buccal/labial infiltration
In the mandible, how is anaethesia of the buccal gingivae achieved?
Lower molars & 2nd premolars: Buccal infiltration (addn. to block)
Lower 1st premolar & canine: infiltration or long buccal or mental nerve block
Lower incisors and canine: buccal/labial; infiltration
In the mandible, how is anaethesia of the lingual gingivae achieved?
secondary part of inferior alveolar nerve block (lingial nerve block)
Lingual infiltration
What is the most fragile part of a needle?
The hub
What does the bevel of a needle provide?
a cutting surface to penetrate mucosa with as little resistance as possible
how should the bevel of needle insert into the mucosa?
With as small an angle to long axis of tooth as is possible - decreases deflection therefore increases accuracy
What does the guage of a needle refer to?
the diameter of the needle lumen
< gauge = > diameter of lumen
> gauge needle = ….. deflection so ….. accuracy, & …. breakage, & …… aspiration
LESS deflection so INCREASED accuracy, & LESS breakage, & EASIER aspiration
The length of a needle is measured from where to where?
Hub to tip
What is the length of a short needle?
20-25mm
What is the length of a long needle?
30-35mm
Why should needles not be inserted upto the hub?
The hub is the weakest point and most likely area for #
