Pain Perception of Needle-free System

Comparative Evaluation of Pain Perception With a New Needle-Free System and Dental Injection in Children: A Randomized Clinical Trial

The purpose of this study is to evaluate and compare the pain perception associated with a needle-free injection system( Comfort-In) and dental injection method in filling and pulpotomy treatments

Needle-free injection system(Comfort-In) and dental injection method was applied on the teeth of children who need dental treatment.70 patients were included in the study. Patients were randomized into two grups according to the injection technique.

Group1: Needle-free injection system(Comofrt-In) 2:Dental injection method. The pain intensity was assessed during anesthesia, during treatment and at the end of thetreatment by the Wong Baker Faces Pain Scale.

The datas were analyzed with a three-way variance method in repeated.

Inclusion Criteria:

• Aged between 4-11 years
• Having no developmental or systemic disorder or no history of allergy
• Having "positive" or "definitely positive" cooperation level according to the Frankl Behavior Scale
• Having sufficient mouth opening
• Operation only on primary teeth
• Having decayed teeth that require anesthesia

Exclusion Criteria:

• Patients younger than five years, older than 11 years,
• Patients with systemic or developmental disorders
• Children with an allergy history
• 'Negative' or 'definitly negative' behavior rating according to the Frankl scale
• Patients whose mouth opening is not sufficient for dental treatment
• Operating only on permanent teeth
• Teeth that are beyond the treatment stage
• When pain occurred during treatment, supplemental anesthetics administrated, and these children were excluded.