Category Archives: Orthodontic Materials

Types of Arch wires

Summarized by Dr. Hani Alhebshi , from a course given by (Dr. Nabeel Talic from King Saud University). 

Classification of wires can be according to :

Material :

Stainless steel , Elgiloy , Titanium alloys , glass or polymers.

Coating :

Coated or non Coated : Ion implementation , Spray Coating , Sleeving.

Morphology :

Round , Square , Rectangular , Single or multi-strand.

Metal Wires :

  • Stainless steel
  • Cobalt Chromium ( Blue Elgiloy ).
  • B-Titanium Molybdenum ( TMA)
  • Titanium Niobium ( TiNb)
  • Nickle-Titanium ( NiTi).

Esthetic Wires

  • Plastic Coated wires
  • Composite wires.

Continue reading Types of Arch wires

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Orthodontic Elastics

Summarized by Dr. Hani Alhebshi …

The following information are summarized mainly from an article titled “Elastics in orthodontics: a review” by VP Singh
, PR Pokhrael , K Pariekh , DK Roy, A Singla , KP Biswas as referenced at the end of this post.

Elastics are widely used in different clinical situations.

Elastics have an internal diameter usually measured in a unit of an inch like 1/8 of inch.

The thickness of the elastic band will affect the force it delivers.As the thickness increases the force delivered increases.

rubber bands dimentions

How long should the elastics be stretched to get the desired force ?

The standard force index employed by suppliers indicates that at three times the original lumen size, elastics will exert the force stated on the package. Continue reading Orthodontic Elastics

Effect of water and saliva contamination on shear bond strength of brackets bonded with conventional, hydrophilic, and self-etching primers

This study assessed the effect of water and saliva contamination on the shear bond strength and bond failure site of 3 different orthodontic primers (Transbond XT, Transbond Moisture Insensitive Primer, and Transbond Plus Self Etching Primer; 3M Unitek, Monrovia, Calif) used with a light-cured composite resin (Transbond XT). Bovine permanent mandibular incisors (315) were randomly divided into 21 groups (15 in each group). Each primer–adhesive combination was tested under 7 different enamel surface conditions: (1) dry, (2) water application before priming, (3) water application after priming, (4) water application before and after priming,

Continue reading Effect of water and saliva contamination on shear bond strength of brackets bonded with conventional, hydrophilic, and self-etching primers

Effect of moisture, saliva, and blood contamination on the shear bond strength of brackets bonded with a conventional bonding system and self-etched bonding system

Abstract Background: The success of bonding brackets to enamel with resin bonding systems is negatively affected by contamination with oral fl uids such as blood and saliva. The new self-etch primer systems combine conditioning and priming agents into a single application, making the procedure more cost effective. Objective: The purpose of the study was to investigate the effect of moisture, saliva and blood contamination on shear bond strength of orthodontic brackets bonded with conventional bonding system and self-etch bonding system. Continue reading Effect of moisture, saliva, and blood contamination on the shear bond strength of brackets bonded with a conventional bonding system and self-etched bonding system

Effect of Load Deflection on Corrosion Behavior of NiTi Wire

ABSTRACT

For dental orthodontic applications, NiTi wires are used under bending conditions in the oral environment for a long period. The purpose of this study was to investigate the effect of bending stress on the corrosion of NiTi wires using potentiodynamic and potentiostatic tests in artificial saliva. The results indicated that bending stress induces a higher corrosion rate of NiTi wires in passive regions. Continue reading Effect of Load Deflection on Corrosion Behavior of NiTi Wire