Аннотация:examination showed that porcelain crown of #11 incisor edge was fractured and a fistula near apex area of #21 was noted, #11 and #21 were stable with no mobility (Figure 1).Then the patient was checked with #11, #21 apical film.It showed radiolucency over apex of #21 and some gutta-percha fragments were noted (Figure 2).The diagnosis was apical resorption [inflammatory].In this article, all procedures were performed by using Er:YAG laser [2940nm, LiteTouch Dental Laser, Light Instrument, Israel] with copious saline coolant under local anesthesia. Laser TreatmentsStep 1. Laser scalingThe setting was 50 mJ/10 Hz with 100% of water for full mouth laser scaling and then ultrasonic scaling tip was used for supragingival scaling.In addition, another laser setting was applied at 50 mJ/30Hz with 100% of water for subgingival sterilization and then ultrasonic round tip was used for subgingival curettage [7,8]. Step 2. Vertical soft tissue incisionThe setting was 100 mJ/40 Hz with 100% of water for incision [in vestibular near apex of #21] (Figure 3). Step 3. Granulation tissues ablationThe setting was 400 mJ/15Hz with 100% of water.Granulation tissues were ablation thoroughly (Figures 4 and5).
