Isolation with a dental dam and HVE or with the Isolite system appears to aid in the reduction of spatter during operative dental procedures, potentially reducing exposure to oral pathogens.
(1) Background: Prefabricated zirconia crowns are used to restore teeth in children. The purpose of this study was to evaluate the removal of these crowns with the erbium, chromium: yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser; (2) Methods: A total of 12 primary and 12 permanent teeth were prepared and prefabricated zirconia crowns were passively fitted and cemented with two resin modified glass-ionomer (RMGI) cements. Surface areas of prepared teeth and crowns were calculated. Crowns were removed using two laser settings: 4.5 Watts, 15 Hertz, 20 water/20 air, and 5 Watts, 15 Hertz, 50 water/50 air. The retrieval time and temperature changes were tested recorded. Data were analyzed using ANOVA with Tukey’s adjusted post hoc pairwise comparison t-test; (3) Results: The average time for crown removal was: 3 min, 47.7 s for permanent; and 2 min 5 s for primary teeth. The mean temperature changes were 2.48 °C (SD = 1.43) for permanent; and 3.14 °C (SD = 1.88) for primary teeth. The time to debond was significantly positively correlated with tooth inner surface area and volume, outer crown volume, and the cement volume; (4) Conclusions: Use of the Er,Cr:YSGG laser is an effective, safe and non-invasive method to remove prefabricated zirconia crowns cemented with RMGI cements from permanent and primary teeth.
(1) Background: Prefabricated zirconia crowns are used to restore teeth in children. The purpose of this study was to evaluate the removal of these crowns with the erbium, chromium: yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser; (2) Methods: Twelve primary and 13 permanent teeth were prepared and prefabricated zirconia crowns were passively fitted and cemented with two resin modified glass-ionomer cements. Surface areas of prepared teeth and crowns were calculated. Crowns were removed using two laser settings: 4.5 Watts, 15 Hertz, 20 water/ 20 air, and 5 Watts, 15 Hertz, 50 water/50 air. The retrieval time and temperature changes were tested recorded. Data were analyzed using ANOVA with Tuckey’s adjusted post hoc pairwise comparison t-test; (3) Results: The average time for crown removal was: 3 minutes, 47.7 seconds for permanent; and 2 minutes 5 seconds for primary teeth. The mean temperature changes were 2.48℃ (SD=1.43) for permanent; and 3.14℃ (SD=1.88) for primary teeth. The time to debond was significantly positively correlated with tooth inner surface area and volume, outer crown volume, and the cement volume; (4) Conclusions: Use of the Er,Cr:YSGG laser is an effective, safe and non-invasive method to remove prefabricated zirconia crowns cemented with RMGI cements from permanent and primary teeth.
The aims of this study were to describe patient utilization of an urgent care clinic (UCC) in a dental school for one year and to assess dental students’ perceptions of the benefits of training in this clinic. Aggregate clinic data from July 3, 2017, through July 6, 2018, were used to determine number of patients, number of new patients, number of new patients who elected to transfer their primary dental care to the university, number who were seen for a follow‐up, and service/clinic to which each patient was referred. Student evaluations were used to determine the benefits students perceived in their training in the UCC. Results showed that 1,674 patients were seen in the UCC during the study period. Of these, 67% were new patients, and 53% of these new patients opted to transfer their primary dental care to the university. An average of 7.03 patients were treated per day, and 2.48 new patients per day were generated for the predoctoral student clinic. The most common referrals were to oral surgery (37%), endodontics (30%), and the predoctoral dental clinic (28%). Among these patients, 39% scheduled follow‐up appointments, and the attendance rate was 69%. About 80% of eligible students (40/50) completed the questionnaire, and many provided optional comments. Over 80% of the responding students responded favorably regarding the learning experiences and assessments during the UCC rotation. This study found that establishment of the UCC increased the pool of patients and provided students the necessary experiences in triaging and treating dental emergencies.
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