Paper Information

Journal:   JOURNAL OF DENTAL MATERIALS AND TECHNIQUES   MARCH 2014 , Volume 3 , Number 1; Page(s) 11 To 15.
 
Paper:  TORQUE REMOVAL EVALUATION OF SCREW IN ONE-PIECE AND TWO-PIECE ABUTMENTS TIGHTENED WITH A HANDHELD SCREWDRIVER
 
Author(s):  GHANBARZADEH JALIL, RAJABZADEH MAHBOOBEH, NAKHAEI MOHAMMAD REZA, RAJATIHAGHI HAMIDREZA, TAYARANI NAJJARAN NILOUFAR
 
* 
 
Abstract: 

Introduction: Some clinicians use a handheld screw driver instead of a torque wrench to definitively tighten abutment screws. The aim of this study was to compare the removal torque of one-piece and two-piece abutments tightened with a handheld driver and a torque control ratchet.
Methods: 40 ITI implants were placed in acrylic blocks and divided into 4 groups. In groups one and two, 10 ITI one-piece abutments (Solid
â) and in groups three and four, 10 ITI two-piece abutments (Synoctaâ) were placed on the implants. In groups one and three abutments were tightened by 5 experienced males and 5 experienced females using a handheld driver. In groups two and four abutments were tightened using a torque wrench with torque values of 10, 20 and 35 N.cm. Insertion torque and removal torque values of the abutments were measured with a digital torque meter.
Results: The insertion torque values (ITVs) of males in both abutments were significantly higher than those of females. ITVs in both Solid
â and Synoctaâ abutments tightened with a handheld screwdriver were similar to the torque of 20 N.cm in the torque wrench. Removal torque values (RTVs) of solidâ abutments were higher than those of synoctaâ abutments.
Conclusion: The one- piece abutments (solid
â) showed higher RTVs than the two-piece abutments (synoctaâ). Hand driver does not produce sufficient preload force for the final tightening of the abutment.

 
Keyword(s): HAND DRIVER, ONE-PIECE ABUTMENT, REMOVAL TORQUE, TORQUE WRENCH, TWO-PIECE ABUTMENT
 
References: 
  • ندارد
 
  Yearly Visit 66
 
Latest on Blog
Enter SID Blog