basic exodontia part1

Question 1

types of blades

what part of the instrument is this?

Answer 1

handle –> shank –> blade

1. striahgt type
2. triangular type - cryer elevator
3. pick up type - apical pick

Question 2

principles of elevators

Answer 2

1. lever
2. wedge
3. wheel and axle

Question 3

use of fulcrum or lever

Answer 3

lever is a mechanism for transmitting a modest force with the mechanical advantage of a long lever arm and a short resistance arm into a small movement against great resistance

Question 4

wedging principle

Answer 4

wedge expands, splits, and displaces portion of substance that recieves it

Question 5

which instrument is an example of wheel and axel

Answer 5

crossbar elevators

Question 6

straight elevator number and name

Answer 6

301 apexo

Question 7

2 hourigan

Answer 7

type of periosteal elevator

Question 8

miller and potts elevators

Answer 8

serrated curved elevator

Question 9

number 9 molt

Answer 9

periosteal elevaot

Question 10

austin retractor

Answer 10

right angle retractor that can be used to retract cheek, tongue, or flaps

*(mostly for cheek retraction)

Question 11

weider retractor

Answer 11

large retractor used to retract the tongue
- serrated surface helps engage the tongue so that it can be held securely

helps displace the tongue medial and anterior away from field of view

Question 12

adson tissue forceps

Answer 12

used to gently stabalize soft tissue for suturing or dissection

Question 13

stillies vs asdson

Answer 13

stillies is longer and used more for posterior locations of the mouth

Question 14

allis tissue forceps

Answer 14

useful for grasping and holding tissue that will be excised

has beaks on them

Question 15

bone file is only effective on what stroke

Answer 15

pull stroke

*used for smoothing small, sharp edges or spicules of bone

Question 16

periapical curette use

Answer 16

double ended spoon shaped instrument used to remove soft tissue from bony cavities

principle use is also to remove granulomas or cysts from periapical lesions
- but also used to remove smalll amounts of granulation tissue debris from the socket

Question 17

beak difference of hemostat vs needle holder

Answer 17

needle holder
- cross hatched to permit a positive grasp of the suture needle

hemostat
- parallel grooves on the face of the beaks thereby decreasing the control over needle and suture

Question 18

which fingers are used in holding the needle holder

Answer 18

thumb and ring finger

Question 19

where do you hold the needle with the needle holder

Answer 19

needle holder grasps the curved needle two thirds of the distance from the tip of the needle

Question 20

shape of needle mostly used

Answer 20

triangular in cross section - which makes it a cutting needle

Question 21

types of non resporbable sutures

Answer 21

silk (most common non resorbable used in OS)
nylon, vinyl, stainless steel
(usually not used)

Question 22

resorbable suture

Answer 22

gut

aka chromic gut

Question 23

chromic gut

Answer 23

lasts up to 7-10 days

this is a monofilament suture

(polyfilament means the material is braided;

Question 24

is silk poly or mono filamant?

Answer 24

poly

less irritant to tissues but can cause wicking

Question 25

implication of poly vs mono filament

Answer 25

wicking
- being polyfilament - they tend to wick oral fluids along the suture to the underlying tissues and can carry more bacteria

Question 26

side of the elevator that is working side

Answer 26

the concave side

Question 27

cryer elevators

Answer 27

triangular shaped and used for mesial or distal roots

aka east / west

typical when broken root remains in the tooth socket and the adjacent socket is empty

Question 28

no. 301 vs 34S 46 and 77R?

Answer 28

size
the 301 is the smallest

34S common large one

Question 29

angled shaped elevator

Answer 29

miller and potts

Question 30

crane pick use

Answer 30

used to elevate whole roots or even teeth after the purchase point has been prepared with a bur

Question 31

root tip pick used

Answer 31

tease small root end of tooth
- insert tip into the periodontal ligament space between the root tip and the socket wall

*this is a delicate instrument

Question 32

three basic components of extraction forceps

Answer 32

1. handle
   - usually have a serrated surface to allow a positive grip and to prevent slippage
2. hinge
3. beaks

Question 33

techniue when holding forcep to gain more force

Answer 33

more rotational force can be achieved by moving the thumb around and under the handle

Question 34

how to hold maxillary forceps vs mandibular

Answer 34

maxillary - held with the palm under the handle

mandibular
- held with the palm on top of forceps

Question 35

english style forceps

- general difference

Answer 35

hinge is in the vertical direction

hinge of american is in the horizontal direction

Question 36

beak on forcep is designed for?

Answer 36

designed to adapt to the tooth root near the junction of the crown and root
- the more closely the beaks of the forceps adapt to the tooth roots, the more efficient the extraction is

• not designed to adapt to any part of the crown