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 Table of Contents  
CLINICAL INNOVATION
Year : 2018  |  Volume : 52  |  Issue : 2  |  Page : 149-151

Self-customized crimpable hook


1 PG Student, Department of Orthodontics and Dentofacial Orthopedics, College Of Dental Sciences, Davangere, Karnataka, India
2 Prof. and HOD, Department of Orthodontics and Dentofacial Orthopedics, College Of Dental Sciences, Davangere, Karnataka, India

Date of Submission19-Mar-2017
Date of Acceptance27-Jun-2017
Date of Web Publication13-Apr-2018

Correspondence Address:
Dr. Waddaramane Fakkir Sab
Department of Orthodontics and Dentofacial Orthopedics, College Of Dental Sciences, Davangere, Karnataka
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jios.jios_29_17

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  Abstract 


Universally, hooks are meant for application of a force delivery system. Recently, hooks bent into the archwire/soldered hooks were replaced with crimpable archwire hooks in clinical practice. An alternative to crimpable hooks, a simpler, cost-effective method to reduce the chairside time was thought, which leads to innovation. This article describes the stepwise fabrication and application of simple self-customized crimpable hooks onto the archwire. These self-customized crimpable hooks are very economical and extremely useful for practitioners and can be easily fabricated at the chairside. They can be positioned where ever required and also can be used as an alternative to crimpable hooks without welding. It has added advantage of easy removal with a crimpable hook removal plier without causing distortion of the main archwire.

Keywords: Crimpable hooks, hook, SS wire


How to cite this article:
Sab WF, Shivaprakash G. Self-customized crimpable hook. J Indian Orthod Soc 2018;52:149-51

How to cite this URL:
Sab WF, Shivaprakash G. Self-customized crimpable hook. J Indian Orthod Soc [serial online] 2018 [cited 2018 Jun 22];52:149-51. Available from: http://www.jios.in/text.asp?2018/52/2/149/230158




  Introduction Top


Hooks on the archwire can be directly attached for the application of force delivery systems, using either elastomeric materials or nickel-titanium closed coil springs. Hooks which are bent into the archwire/soldered are time-consuming process and may lead to annealing of the archwire, especially during soldering. Archwires with posts commercially available may be an alternative choice; however, it requires large inventory stock and has cost implication.

Alternative to the above is a crimpable hook. However, it also has few disadvantages, such as it may cause gambling on the wire/possibility of building torque into the wire.

This article describes the fabrication and application of simple, innovative self-customized hooks onto the archwire for attachment of force delivery system.


  Fabrication Top


Armamentarium used to fabricate the self-customized crimpable hook [Figure 1]
Figure 1: Armamentarium used for fabrication of self-customized crimpable hook

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  • #139 (bird beak) plier
  • 0.019 inch × 0.025 inch SS wire (0.021 inch × 0.025 inch can also be used)
  • Hook placement plier.



  Easy Hooks on Archwires Top


  • Step 1: Take 0.019 inch × 0.025 inch SS wire to make a helix as shown in [Figure 2]a.
  • Step 2: Extend the arm from the helix of the desired length of 4, 6, and 8 mm, respectively, as per the clinical requirement [Figure 2]b
  • Step 3: Perpendicular to the arm, give a 2 mm of horizontal U bend, the distance between the intra-U bend should be <0.019 inch for 19 × 25 rectangular archwire and <0.021 inch for the 21 × 25 rectangular archwire, respectively [Figure 2]c
  • Step 4: The hook is ready for use
  • Step 5: After the fabrication of the hook, place it onto the archwire intraorally or extraorally as per the need [Figure 2]d.
Figure 2: Easy hooks on archwire. (a) Helix, (b) Extended arm from the helix, (c) Perpendicular arm, (d) ‘U’ bend

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  Advantages of This Innovative Hook Top


  • Cost-effective
  • Minimal armamentarium required
  • Ease of fabrication at chairside
  • Time-saving
  • Amenable to change of position of the hook as per requirement
  • In surgical case for intermaxillary fixation.



  Application Top


  • Retraction and protraction arch mechanics [Figure 3]a
  • Space closure
  • Engaging the inter/intra-maxillary/settling elastics [Figure 3]b
  • Arch intrusion
  • Surgical splint stabilization
  • Can be used as implant guide [Figure 3]c.
.
Figure 3: Applications of self-customized crimpable hook. (a) Retraction and protraction arch mechanics, (b) Engaging the intra/inter/settling elastics, (c) Used as an implant guide

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  Discussion Top


Orthodontists frequently use hooks as a means for application of orthodontic forces. However, soldered hooks are time-consuming and soldering cause loss of the archwire properties whereas hooks bent in the archwire may also lead to incorporation of some unwanted torque in the wire. The crimpable hooks available in the market today are expensive and very often slide along the archwire on force application. Therefore, a simple and cost-effective method for the clinician as an alternative to these hooks was thought which lead to the innovation. This innovation describes the stepwise fabrication and application of a simple, self-customized crimpable hook to place on the archwire.

Crimping of the hooks with heavy force can cause the wire to distort,[1] and spot welding or soldering can result in annealing of the wire compromising the wire properties.[2] Furthermore, pre-posted wires have an increased cost and require large inventory.[3]

This self-customized crimpable hook is extremely useful for clinical practice, as it can be easily fabricated at chairside, can be repositioned easily in case of incorrect placement, and can be used as an alternate to crimpable hooks when not available. This can be easily removed with innovative crimpable hook removal plier without deforming the main archwire.

U-shaped slot size of the self-customized crimpable hook holds firmly without slipping and displacement onto the main archwire as it is made to match with the wire dimension 0.019/0.021; thus, welding is not required.


  Conclusion Top


These self-customized crimpable hooks are very economical and extremely useful in clinical practice; which can be easily fabricated at chairside, it can be positioned where ever required and can be used as an alternative to crimpable hooks when not available. These can be easily removed with crimpable hook removal plier without deforming the main archwire.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.



 
  References Top

1.
Evans RD, Jones ML. Laboratory evaluation of surgical ball hook crimping pliers. Int J Adult Orthodon Orthognath Surg 1991;6:57-60.  Back to cited text no. 1
    
2.
Yadav S, Upadhyay M. Custom-made ligature hooks for engaging elastics. J Clin Orthod 2007;41:39-40.  Back to cited text no. 2
    
3.
Verma RK, Jena AK, Singh SP, Utreja AK. Sturdy hooks for elastics attachment. J Clin Orthod 2012;46:572.  Back to cited text no. 3
    


    Figures

  [Figure 1], [Figure 2], [Figure 3]



 

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  In this article
Abstract
Introduction
Fabrication
Easy Hooks on Ar...
Advantages of Th...
Application
Discussion
Conclusion
References
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