parts of a dental instrument and dental instruments techniques and working zones

handle

• it is used to hold instrument also called as shaft

shank

• rod shaped neck between handle and working end

working end

• part that does the work also called as blade or nib

handle
shank
working end

• what are the 3 parts of a dental hand instruments

bonus

Correct grasps provide:

• maximized stability during instrumentation

• minimized patient trauma and operator fatigue

• improved tactile sensitivity

pen grasp
modified pen grasp
inverted pen grasp
palm and thumb grasp

• 4 types of instrument grasps

pen grasp

modified pen grasp

inverted pen grasp

palm and thumb grasp

rests

• firm support (ideally from hard tissue) to steady the hands during operatuing procedures

guard

• operator’s own finger of other hand to protect soft tissues

right handed
left handed

• what are the 2 types of four handed dentistry

right handed

12 to 2 = static zone
2 to 4 = assistant’s zone
4 to 7 = transfer zone
7 to 12 = operator’s zone

left handed

12 to 5 = operator’s zone
5 to 8 = transfer zone
8 to 10 = assistant’s zone
10 to 12 = static zone

static zone

right handed: 12 to 2 =

assistant’s zone

right handed: 2 to 4 =

transfer zone

right handed: 4 to 7 =

operator’s zone

right handed: 7 to 12 =

operator’s zone

left handed: 12 to 5 =

transfer zone

left handed: 5 to 8 =

assistant’s zone

left handed: 8 to 10 =

static zone

left handed: 10 to 12 =