Severely Curved Molar Instrumentation and Obturation
- Negotiating the canal
- Avoiding transportation
- Avoiding instrument breakage
- Three Dimensional Obturation
Figure 1 shows a preoperative radiograph of tooth #3 with severely curved MB root canal system. When negotiating a curved canal, gaining straight access is the key to success. To that end, I used Peeso Reamers sizes 1 and 2. The goal is to avoid transportation using small pre-curved reamers and irrigation. I used rotary instrumentation once a glide path was established. Using brand new rotary files and copious irrigation will decrease chance of instrument breakage.
Figure 2 shows master cone measurement film and Figure 3 shows final radiograph after obturation of root canal system. EZ-fill sealer and warm vertical condensation technique were used to obturate the canals.
The following is the sequence of instrumentation used in this case:
- Local anesthesia, rubber dam placement and access
- Locating canals
- Hand instruments all canals to estimated working length up to size 15 Reamers
- Gaining straight access using Peeso Reamers sizes 1 and 2
- Hand instrument MB canals to size 20 Reamer
- Completion of instrumentation using rotary instruments up to apical size 35