Effectiveness of Disposable (Single-use) Tips for Dental Air-water Syringes

Eur J Prosthodont Restor Dent. 2015 Dec;23(4):187-91.


Background: Single-use dental syringe (SUS) tips eliminate cross-infection risks. Many dental materials are moisture sensitive; therefore bonding could be affected by remaining moisture from SUS tips.

Methods: An air-water syringe was calibrated to 50 PSI and the air pressure measured. SUS tips were then attached and pressure re-measured. Seven tips were tested; moisture content and spray pattern were investigated. Ethical approval was granted. Twenty third molar teeth were sectioned, stored in phosphate buffered saline and randomly allocated into groups with a SUS tip. They were mounted in acrylic and polished. Specimens were dried with a tip under standardised conditions, treated using a 3-step etch-prime-bond technique, then had a post bonded perpendicular to the dentine surface. The force to detach them was measured. Data were analysed using one-way analysis of variance (ANOVA) and Chi-squared tests.

Results: The difference in output pressure between groups proved significant (p < 0.001). Tensile force at failure was significantly different between groups (p = 0.19).

Conclusions: The pressure output of the syringe and bond strength are influenced by the SUS tip.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acid Etching, Dental / methods
  • Air
  • Air Pressure
  • Composite Resins / chemistry
  • Dental Bonding / instrumentation*
  • Dental Materials / chemistry
  • Dentin / ultrastructure
  • Desiccation
  • Disposable Equipment*
  • Equipment Design
  • Glass / chemistry
  • Humans
  • Light-Curing of Dental Adhesives
  • Materials Testing
  • Microscopy, Electron, Scanning
  • Post and Core Technique / instrumentation
  • Random Allocation
  • Resin Cements / chemistry
  • Stress, Mechanical
  • Surface Properties
  • Syringes*
  • Water


  • Composite Resins
  • Dental Materials
  • Resin Cements
  • Scotchbond Multi-Purpose
  • fiberglass
  • Water