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The purpose of this study is to evaluate the effect of Low level laser therapy on stability and displacement of orthodontic miniscrew implants using two different force application protocols.
The aim of this study is to evaluate the effect of Low level laser therapy (LLLT) on stability and displacement of orthodontic miniscrew implants with mediate and immediate force application. They will be assessed 48 miniscrew implants placed in patients in orthodontic treatment at the postgraduate clinical in Orthodontics, at School of Dentistry of Ribeirão Preto, University of São Paulo. They will be randomly divided into 4 groups: 1- LLLT and immediate force application; 2- LLLT and force application 4 weeks after implantation; 3- immediate force application without LLLT and 4- force application 4 weeks after implantation without LLLT. Orthodontic force of 150 gF will be applied for 3 months. A low power laser device Therapy XT with a wavelength of 660 nm and output of 100 mW immediately after implantation (energy density: 4J/cm2), and 808 nm with 100 mW (energy density: 8J/cm2), every 48 hours for two weeks in the following applications will be used. The stability will be assessed using Resonance Frequency Analysis (RFA) at three times: the implantation day (T1), one month (T2) and after 3 months of force application (T3). Stability measures will be evaluated in Implant Stability Quotient (ISQ). To assess the amount of miniscrew implant displacement, it will be used Cone Beam Computed Tomography (CBCT) at the beginning (CT1) and final of the application of orthodontic force (CT2). Three-dimensional models will be created in specific programs and superimpositions of CT1 and CT2 will be used to measure the distance in millimeters between inicial and final position. The evaluation will be carried out in three points: head of miniscrew implant (point C), thread (point R) and apex of miniscrew implant (point A). The results will be statistically analyzed according to nature of the data and the significance level to be adopted will be 5%.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| LLLT + immediate force | Experimental | Use of Low-level laser therapy and not mediate orthodontic force application (150 gF the day of the implantation). |
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| LLLT + mediate force | Experimental | Use of Low-level laser therapy and mediate orthodontic force application (150 gF 4 weeks after the day of the implantation). |
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| Immediate force application | No Intervention | Not mediate orthodontic force application (150 gF the day of the implantation), without use of Low-level laser therapy. | |
| Mediate force application | Experimental | Mediate orthodontic force application (150 gF 4 weeks after the day of the implantation), without use of Low-level laser therapy. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Low-level laser therapy | Procedure |
|
| Measure | Description | Time Frame |
|---|---|---|
| Change from baseline miniscrew implant stability at 1 and 3 months of force application. | It will be used a Resonance frequency analysis (RFA) equipment. Stability measures will be evaluated using a unique unit of measure: Implant stability quotient (ISQ). All groups will be evaluated the day of the implantation (T1) and after 1 month (T2).The last stability measure (T3) will be done 3 months after the implantation day in the groups without mediate force application, and 4 months after the implantation day in the groups with mediate force application. | T1: Implantation day; T2: after 1 month; and, T3: after 3 months of force application. |
| Change from baseline miniscrew implant position at 3 months of force application. | It will be used Cone Beam Computed tomography (CBCT). Three-dimensional models will be created in specific programs and superimpositions of CT1 and CT2 will be used to measure the distance in millimeters between initial and final position. | CT1: Implantation day; and, CT2: 3 months of orthodontic force application. |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Guido A Marañón Vásquez, DDS | University of Sao Paulo | Principal Investigator |
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| Mediate force application | Procedure | Mediate force application protocol: orthodontic force application (150 gF) 4 weeks after the day of the implantation. |
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| ID | Term |
|---|---|
| D028022 | Low-Level Light Therapy |
| ID | Term |
|---|---|
| D053685 | Laser Therapy |
| D013812 | Therapeutics |
| D010789 | Phototherapy |
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