Flanagan Terry, Wahl Michael J, Schmitt Margaret M, Wahl Jean A
AstraZeneca, Wilmington, Delaware, USA.
Gen Dent. 2007 May-Jun;55(3):216-7.
Many dentists prefer using smaller gauge (27- or 30-gauge) needles for anesthesia injection, believing that needles with a smaller diameter result in less injection pain than wider diameter needles. For this study, three dentists in a general practice administered 930 injections to 810 adult patients using 25- and 27-gauge needles for mandibular inferior alveolar block injections and 25-, 27-, and 30-gauge needles for maxillary buccal infiltration or palatal injections. Patients, who were blinded as to the needle gauge, were asked afterward to rate the injection pain on an 11-point scale (0-10). There was no statistically significant difference in perceived injection pain based on needle gauge when analyzed for injection location (mandibular, maxillary posterior, maxillary anterior, and palatal), injection side, patient gender, treating dentist, or overall. These results indicate that when it comes to injection pain and needle gauge, size does not matter.
许多牙医更喜欢使用较小规格（27号或30号）的针头进行麻醉注射，他们认为直径较小的针头比直径较大的针头注射时疼痛更少。在本研究中，三位全科牙医使用25号和27号针头进行下颌下牙槽阻滞注射，并使用25号、27号和30号针头进行上颌颊侧浸润或腭部注射，对810名成年患者共进行了930次注射。对针头规格不知情的患者随后被要求在11分制（0 - 10）上对注射疼痛进行评分。在按注射部位（下颌、上颌后部、上颌前部和腭部）、注射侧、患者性别、治疗牙医或总体情况进行分析时，基于针头规格的注射疼痛感知没有统计学上的显著差异。这些结果表明，在注射疼痛和针头规格方面，尺寸并不重要。
