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TITLE:

A RESEARCH STUDY TO ASSESS THE USE OF SHAPE MEMORY POLYMERS IN REGULAR ORTHODONTIC PRACTICE WITH RESPECT TO ASSOCIATED FEATURES

AUTHORS:

Dr. Maria Mustafa, Dr Azka Anser, Dr Ammad Amjad

ABSTRACT:

Glass fibre reinforced shape memory polymers (GFRSMPU) is a potential alternate material for the orthodontic archwires. It has added benefits over metal wires which include better mechanical features, allergy, infection and pure shape memory polymers deficiency. The process of preparation of shape memory polymer wire includes melt-spinning of polymers block copolymer for orthodontic application in two-step procedure poly (e-caprolactone) diol (PCL), 4,40-methylene bis (phenyl isocyanate) reaction and 1,4-butanediol. An orthodontic assessment was also conducted on an orthodontic model along with a metal bracket. Recovery force for shape was high (70 gf) for PU wire at a herd segment of (40 wt %) at 50o C for one month. There was an exponential decrease in the first two hours in shape recovery force which reached a balanced recovery force (50 gf) in a time period of twenty days which is sufficient to recover misalignment. The shape memory PU wire is a potent new orthodontic appliance with improved and appealing esthetic appearance. We can also improve the mechanical features of GFRSMPU by adding glass fibres which will also preserve the function of shape memory. Enhanced SMPU carried better orthodontics features for the alignment at the primary stage along with other medical aspects. Keywords: Orthodontic, Misalignment, Teeth, Infection, Allergy, Glass Fiber, Material, Metal, Arch Wires, Shape Memory, Ceramics and Polymer.

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