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Dentistry made easy Dental anatomy for clearing up basics and focusing better on dental materials and instruments . Basic gist of dental materials along with a pictorial presentation of dental materials which helps for better understanding of topics
Typology: Schemes and Mind Maps
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Materials used for manufacturing instruments.
2.Stainless steel a) Pure stainless steel
Classification of Operative dental Instruments. Instruments are classified into 2 categories :
Sturdevant classification
Hand cutting instruments are made up of three parts:
Based on shank angles GV Black clalssified hand cutting instruments: A) Straight: No angles in the shank B) Monangle: One angle in the shank C) Bin-angle: Two angles in the shank D) Triple-angle: three angles in shank
Blade It is the working end of the hand cutting instrument. It is connected to handle by the means of shank. It ends in the cutting edge. a)Cutting edge: Edge of blade mainly for cutting action. b)Blade angle : angle between long axis of blade and shaft c)Cutting edge angle : angle between margin of cutting edge and long axis of shaft.
According to G.V. Black, Instruments can be named as…….. 1.Order: Purpose or Function of instrument. Eg, Excavator 2.Sub-order: Position or Manner of Use of instrument. Eg, pull and push 3.Class: Form of working end of instrument. Eg, Chisel, Hatchet
4. Sub-class: Shape of the shank. Eg, Bin-angle Combining all these points, the Instruments can be named. Naming- usually moves from 4 to 1
Bin-angle hatchet push excavator. Generally sub-order is not useful and thus omitted. Thus, named as Bin-angle hatchet excavator Bin angle- Shank angle hatchet - Working end excavator - Purpose