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J Dent Educ. 73(4): 518-522 2009
© 2009 American Dental Education Association
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Milieu in Dental School and Practice

Local Anesthetic Syringe Ergonomics and Student Preferences

R. Constance Wiener, D.M.D.; Richard J. Crout, D.M.D., Ph.D.; Joan Sandell, D.M.D.; Brandi Howard, D.D.S.; Lydia Ouassa, D.D.S.; Stanley Wearden, Ph.D.; Michael A. Wiener, D.M.D.

Key words: ergonomics, local anesthetic syringes, dental instrumentation comparisons

Submitted for publication 10/28/08; accepted 01/26/09

With a diverse population of dentists, dental hygienists, and dental assistants, there is a wide range of sizes and shapes of individuals. Ergonomic considerations have resulted in the design of many adjustable delivery systems, chairs, and pieces of equipment. Companies have marketed instrumentation specifically for people with small hands, yet little research has been done regarding the advertising claims. The objective of this study was to compare the perceptions of dental and dental hygiene students after they used a conventional syringe and a petite syringe that has been marketed as advantageous for individuals with smaller hands. The two syringes were compared for aspiration, injection, and sense of control. A total of 181 students were invited to serve as subjects in the study, and ninety participated. The study involved two phases. During phase I, students used conventional and petite syringes to give a simulated inferior alveolar nerve block injection. In phase II, students gave a simulated palatal injection using both sizes of syringes. After performing the simulations, the students responded to a questionnaire. The students reported that the petite syringe gave them control, and 62.2 percent of them preferred it to the conventional syringe. There were differences in preferences between female and male students and also differences in preferences based on students’ glove sizes. The female students preferred the petite syringe when aspiration was required. Overall, the students who wore small and extra small gloves had a preference for the petite syringe and felt it provided a sense of control, a key component when learning to provide injections.






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