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A randomized clinical trial that evaluates the effect of using 980nm diode laser intracanal irradiation on postoperative pain and root canal disinfection in endodontic retreatment cases with chronic periapical lesions
The endodontic retreatment procedures will be carried out for the participants, then 980nm Diode laser will be used to disinfect root canals. The researcher will then take microbiological samples of the root canals, to determine count and type of microorganisms in root canals. The subject will be asked to determine his level of pain at 7 days after endodontic retreatment procedures in a visual analogue scale (VAS), and to determine number of analgesic tablets needed to relieve his pain in the given charts. The subject will then return to the clinic 7 days later to bring back his charts. The researcher then will take another microbiological sample of the root canals, and complete the endodontic retreatment procedures.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| laser | Active Comparator | 980 nm diode laser (maximum output of 3 watts and coupled with a fiber optic tip of 200 µm diameter) will be used for four irradiations, of 5 seconds each, after chemo-mechanical preparation procedures. |
|
| Placebo | Placebo Comparator | After chemo-mechanical preparation procedures, the diode laser fiber optic tip will be inserted inside the root canals but not activated. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| 980 nm diode laser | Radiation | 980 nm high power diode laser device. |
| |
| Measure | Description | Time Frame |
|---|---|---|
| postoperative pain, measured using Visual analogue scale (VAS) | Visual analogue scale (VAS) will be used for to record severity of pain. It is a (0-10) scale. Criteria to determine the severity of postoperative pain will be as follows: (0: no pain), (1-3: mild pain), (4-6: moderate pain), (7-10: severe pain). | 7 days after root canal re-treatment procedures |
| Measure | Description | Time Frame |
|---|---|---|
| Root canal disinfection | Number of microorganisms found in root canals will be determined using "Bacterial culture";"Initial sample", 'Pre-lasing sample, "Post-lasing". and "Recolonization sample", in the "Laser group" and "Placebo group". | Four samples will be taken; first, second and third samples will be taken at first visit of endodontic retreatment procedures. while, the fourth sample will be taken in the second visit (7 days later). |
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Inclusion Criteria:
Exclusion Criteria:
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There is no plan to make the participants data available to other researchers
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| ID | Term |
|---|---|
| D010149 | Pain, Postoperative |
| ID | Term |
|---|---|
| D011183 | Postoperative Complications |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D010146 | Pain |
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| ID | Term |
|---|---|
| D054023 | Lasers, Semiconductor |
| ID | Term |
|---|---|
| D007834 | Lasers |
| D055096 | Optical Devices |
| D004864 | Equipment and Supplies |
| D055618 | Radiation Equipment and Supplies |
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A trial with two parallel groups
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All the participants will be blinded, as they will not know which interventional group they belong to
| placebo |
| Other |
the diode laser fiber optic tip will be inserted in root canals, but will not be activated. |
|
| number of analgesic tablets | the participant will determine the number of analgesic tablets needed to relieve his pain after endodontic retreatment procedures. | At day 7 after endodontic retreatment procedures |
| D009461 | Neurologic Manifestations |
| D012816 | Signs and Symptoms |