K3 : Tip Evaluation (1st 3mm)

K3FullView

DETAILS:

FILE NAME: SybronEndo
COMPANY: SybronEndo
MANUFACTURER: SybronEndo
MADE IN: Mexico
WEBSITE: sybronendo.com

 

CHARACTERISTICS:

SIZE: 25/04
FLUTES: 3 (asymmetrical)
SPIRALS PER 16MM: 7
HELIX ANGLE: 31º [fig. 2]
CUTTING ANGLE: VARIES [fig. 1]
DEBRIS REMOVING AREA: 34% [fig. 1]
ROTATION TO FAILURE: 270º
PEAK TORQUE AT FAILURE: 89.87 gf/cm
60 ̊ DEFLECTION: 3.86 g
PLASTIC DEFORMATION: 0º
FILE CORE AREA RELATIVE TO CIRCUMFERENCE AREA: 66%
FILE CORE AREA RELATIVE TO FILE X-SECTION AREA: 58%

 

DISCUSSION:

  • While the K3 has excellent side cutting ability, it is one of the least flexible files. Consequently, the K3 file is best used to enlarge the coronal aspects of a canal or for preparing straighter canals.
  • The minimum rotation to failure is noticeable. However, it should be noted that a file rotating at 500 rpm will complete 3 revolutions in less than 1/4 of a second and no file we’ve tested yet has withstood 3 full rotations without separating.
  • Peak torque at failure is a more important consideration and the K3 compares favorably to other files.

 

Tip SEM

TIP SEM

Fig. 1

Fig. 2

 

 

 

 

 

 

 

 

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