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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT02555501
Other study ID # MCCF-060264-AM
Secondary ID
Status Completed
Phase Phase 3
First received September 17, 2015
Last updated September 18, 2015
Start date October 2014
Est. completion date September 2015

Study information

Verified date September 2015
Source Universidade Ceuma
Contact n/a
Is FDA regulated No
Health authority Brasil: National Health Surveillance Agency
Study type Interventional

Clinical Trial Summary

The aim of the study was to evaluate the therapeutic action through the diameter of the lesion, of low level laser (LLL) associated to photodynamic therapy (PDT) in oral mucositis (OM) lesions, in young patients. A randomized clinical trial blinded, split-mouth was performed. The study sample consisted of 15 cancer patients (3-16 years old) of Aldenora Bello Hospital (São Luís, Maranhão, Brazil). Random allocation by lot of treatments (PDT + LLL and LLL) to quadrants of the oral cavity was performed, and the patient was his own control. Patients were masked about therapy performed on each side of the arch. The evaluation period of both therapeutic regimens was 8 days, and the outcome assessed was the lesion size (measured in cm²). Friedman and Wilcoxon tests were applied and the effect magnitude calculated. The significance level was 5%. Statistically significant difference was observed between the groups for the lesion diameter of the 6th to the 8th day (greater regression of lesion size for the PDT + LLL group), which was confirmed by a difference magnitude moderated. Based on the findings, it is concluded that PDT + LLL showed greater therapeutic effect when compared to LLL in reducing the severity of OM lesions.


Description:

The blind randomized clinical trial included 18 young patients, between 3 and 16 years old, undergoing chemotherapy or chemo/radiological the pediatric ward of Aldenora Bello Hospital in São Luís (Maranhão, Brazil). The study was conducted from October/2014 to January/2015. It was adopted as inclusion criteria patients between 3 and 18 years old, in the inductive phase of chemotherapy, with oral mucositis (OM) and bilateral lesions.

A mouth split model was conducted, and the patients were their own controls. The entry of the patients in the study occurred consecutively. To each patient, the operator/examiner drafted an envelope containing treatments to either side, being masked patient about the treatment of each side: PDT (photosensitized and low level laser) + low level laser; Low level laser].

The following parameters were used for the calculation of sample size: 95% confidence level, 80% statistical power and minimal difference of 0.82 point in the lesions diameter detected between paired samples. A "n" sample minimum of 14 was determined for each treatment. In order to compensate for possible losses, 18 patients were treated.

The treatments (PDT and low level laser; Low level laser) were performed in a hospital bed. Prior to treatment, the OM lesions were evaluated and a lesion on each side was chosen. Lesions should be located at the same site on both sides. The chosen site was the lip mucosa. Before the procedure, the patient was instructed as to brushing and not using mouthwashes, followed by cleaning of the oral cavity with gauze and distilled water. Two days before the laser treatment, the side of the oral cavity chosen for the experimental treatment (PDT and low level laser) was pigmented with the photosensitizer (aqueous solution of 0.005% methylene blue). A ball of sterile cotton was soaked in the dye solution and placed in the center of the lesion. Photosensitizer remained in the place for 5 minutes (pre-irradiation period). Then, to activate the dye, the lesion was irradiated with red light (InGaAlP / phosphide and Indium, Gallium and potassium) (Flash Laser III, DMC, São Carlos, São Paulo, Brazil), with a wavelength of 660 nm, for a period 90 seconds, with a power of 100mW, to 1cm away, according to the manufacturer's specifications. The lesion on the opposite side was treated with ball of sterile cotton soaked in distilled water and the laser unit placed on the lesion without activation of the light. This procedure aimed to mask the patient about the side that received the experimental therapy (PDT and low level laser). This masking was possible because the experimental solution is insipid, very soluble and thus leaves no residue.

From the 3rd to the 10th day (total of 8 days) was carried out only laser therapy on both sides. Lesions were evaluated until the 8th day. After the 8th day of assessment, the lesions were only treated to a complete remission as well as other lesions present in the oral cavity. For laser therapy was first used infrared emitter laser unit with active medium AsGaAl (Gallium Arsenide and Aluminium), with wavelength of 808nm, for analgesia. Then, the investigators used the red emitter, whose active medium was the InGaAlP (phosphide and Indium, Gallium and Potassium), with wavelength of 660nm to photobiomodulation. For both units emitting laser, the tip of the device was closed against the edges of the lesion, perpendicular to the tissue. A irradiation was continuous and the application punctual (10 seconds). The distance between the points of irradiation was about 1cm. The energy delivered was 4J per point of application. The interval between sessions was 24 hours.

The tip of the laser was disinfected with 70% alcohol solution and wrapped with a plastic film. Patients and operators wore glasses for eye protection.

A questionnaire containing demographic, socioeconomic and type of treatment for cancer was applied to parents and children. White blood cell count and platelets (beginning and end of the inductive phase of QT) were extracted from medical records.

The assessed outcome measure was the diameter of the lesion (in cm2). The areas of the lesions were measured with a flexible ruler (record made in cm2) by the operator/examiner from the start of treatment with exclusive laser therapy (3rd day). This procedure was repeated on subsequent days until the 8th day of laser treatment. The measurement of the lesions occurred prior to laser therapy applications.

The Friedman test was used for multiple comparisons within groups (different times of treatment). Paired evaluation between each two moments was evaluated using the Wilcoxon test, with significance corrected by Bonferroni test (p = 0.0071). The Wilcoxon test was used to compare the diameter of the lesion, every day, between the PDT + Low level laser and Low level laser groups (dependent samples/split-mouth). It calculated the effect magnitude (d) of standardized differences between averages of two groups. The level of significance for analysis was 5%.


Recruitment information / eligibility

Status Completed
Enrollment 18
Est. completion date September 2015
Est. primary completion date September 2015
Accepts healthy volunteers No
Gender Both
Age group 3 Years to 18 Years
Eligibility Inclusion Criteria:

- Patients between 3 and 18 years old

- Patients on chemotherapy inductive phase

- Patients with oral mucositis and bilateral lesions

Exclusion Criteria:

- Patients outside the established age

- Patients who are in other phases of chemotherapy

- Patients who did not have bilateral lesions

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Treatment


Related Conditions & MeSH terms


Intervention

Other:
PDT + Low level laser
Two days before the laser treatment, the side of the oral cavity chosen for the experimental treatment was pigmented with aqueous solution of 0.005% methylene blue. A ball of sterile cotton was soaked in the dye solution and placed in the center of the lesion. Photosensitizer remained in the place for 5 minutes (pre-irradiation period). Then, to activate the dye, the lesion was irradiated with red light (InGaAlP / phosphide and Indium, Gallium and potassium). From the 3rd to the 10th day was carried out only laser therapy. For laser therapy was first used infrared emitter laser unit with active medium AsGaAl (Gallium Arsenide and Aluminium). Then, we used the red emitter, whose active medium was the InGaAlP (phosphide and Indium, Gallium and Potassium).
Radiation:
Low level laser
Two days before the laser treatment, the lesion of the side of the oral cavity chosen for the control treatment was treated with ball of sterile cotton soaked in distilled water and the laser unit placed on the lesion without activation of the light. From the 3rd to the 10th day was carried out laser therapy. For laser therapy was first used infrared emitter laser unit with active medium AsGaAl (Gallium Arsenide and Aluminium). Then, we used the red emitter, whose active medium was the InGaAlP (phosphide and Indium, Gallium and Potassium).

Locations

Country Name City State
Brazil Hospital Aldenora Bello São Luís Maranhão

Sponsors (2)

Lead Sponsor Collaborator
Universidade Ceuma Fundação de Amparo à Pesquisa e Desenvolvimento Científico do Maranhão

Country where clinical trial is conducted

Brazil, 

References & Publications (37)

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Lee YH, Park HW, Lee JH, Seo HW, Lee SY. The photodynamic therapy on Streptococcus mutans biofilms using erythrosine and dental halogen curing unit. Int J Oral Sci. 2012 Dec;4(4):196-201. doi: 10.1038/ijos.2012.63. Epub 2012 Dec 7. — View Citation

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Martens LC. Laser physics and a review of laser applications in dentistry for children. Eur Arch Paediatr Dent. 2011 Apr;12(2):61-7. Review. — View Citation

Mattiello FD, Coelho AA, Martins OP, Mattiello RD, Ferrão Júnior JP. In vitro effect of photodynamic therapy on aggregatibacter actinomycetemcomitans and Streptococcus sanguinis. Braz Dent J. 2011;22(5):398-403. — View Citation

Miyabe M, Junqueira JC, Costa AC, Jorge AO, Ribeiro MS, Feist IS. Effect of photodynamic therapy on clinical isolates of Staphylococcus spp. Braz Oral Res. 2011 May-Jun;25(3):230-4. Epub 2011 Feb 25. — View Citation

Oberoi S, Zamperlini-Netto G, Beyene J, Treister NS, Sung L. Effect of prophylactic low level laser therapy on oral mucositis: a systematic review and meta-analysis. PLoS One. 2014 Sep 8;9(9):e107418. doi: 10.1371/journal.pone.0107418. eCollection 2014. R — View Citation

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* Note: There are 37 references in allClick here to view all references

Outcome

Type Measure Description Time frame Safety issue
Primary Lesion size Lesion size measured in cm² 8 days Yes
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