Comparison between Topical and Injection Anesthetics on Pain Related to Orthodontic Miniscrew Placement: A Split-mouth Study

AIMS AND OBJECTIVES

The aims of this study were to compare the anesthetic effect of a lidocaine/prilocaine (L/P) topical anesthetic with placebo on pain from needle sticks and to compare the anesthetic effect of the L/P topical anesthetic with an infiltrative anesthetic on pain from orthodontic miniscrew placement.

MATERIALS AND METHODS

Pain elimination was analyzed from two interventions: (a) needle stick and (b) miniscrew insertion. When assessing pain from needle stick, one side of the mandible received 2.5% lidocaine/2.5% prilocaine topical anesthetic, and the other side received placebo. When evaluating pain from miniscrew placement, one side of the mandible received L/P topical anesthetic and the other side received infiltrative anesthetic. The findings were recorded on a Visual Analogue Scale after needle stick and after miniscrew placement. Subjective assessment was analyzed by a questionnaire.

RESULTS

The L/P topical anesthetic significantly eliminated the pain from needle stick (Mann-Whitney test of medians, 29.0 vs 0.0, respectively, p<0.001). However, the injection anesthetic eliminated the pain from the miniscrew placement better than the L/P topical anesthetic (Mann-Whitney test of medians, 0.0 vs 5.5, respectively, p<0.001). Eighty percent of the subjects felt more comfortable with L/P topical anesthetic than injection anesthetic. Pain from needle stick pain was reported to be the most uncomfortable part of the study.

CONCLUSION

The L/P topical anesthetic efficiently eliminated pain from needle stick. The L/P topical anesthetic did not completely eliminate pain from miniscrew placement as the injection anesthesia, but it did reduce pain to tolerable levels.

CLINICAL SIGNIFICANCE

L/P topical anesthetics can significantly eliminate pain from needle stick injections, and L/P topical anesthetics can reduce pain from orthodontic miniscrew placement to tolerable levels.

Determinants of Needle Stick Injuries Among Healthcare Providers at a Tehran University Hospital in 2016: A Descriptive Report

BACKGROUND

Needle Stick Injuries (NSIs) are the most common occupational injuries among HCWs. The aim of this study was to explore the prevalence and distribution of determinants for such injuries in a university hospital in Tehran, Iran, in 2016.

METHODS

We conducted a descriptive cross-sectional study in Ziaeian Hospital, a teaching hospital of Tehran University. The medical records of 55 Health Care Workers (HCWs) who experienced NSIs in 2016, were extracted from the hospital registry and analyzed using SPSS version 22.

RESULTS

Available data of 55 HCWs with a history of NSIs were extracted from the hospital registry. The highest number of NSIs belonged to registered nurses (34.6%), licensed practical nurses (14.5%) and medical doctors (12.7%), respectively. The majority of the NSIs occurred in the morning shift (50.9%) followed by night shift (36.4%) and evening shift (12.7%). Most of the NSIs occurred in the emergency department (38.1%) and operating room (18.2%). The healthcare workers reported fatigue as the most common reason for being injured by needles (67.4%). All the HCWs were trained and familiarized with the safety and risk control measures after needle stick exposures in the hospital.

DISCUSSION

The present study described the determinants of NSIs among HCWs in a university hospital. The fatigue and working overload were the main reasons for NSIs. The results of this study could be used to address the shortcoming in the guidelines and protocols to ensure the sustainable safety measures that could reduce the occurrence of the NSIs in hospitals in Iran.