Effect of Low Level Laser Therapy on the Temporomandibular Joint During Treatment of Skeletal Class II Malocclusion

mahmoud abdelhameed mohamed

Status: Completed

Conditions: Malocclusion Class II

Treatments: Radiation: low level laser therapy

Study type: Interventional

Funder types: Other

Identifiers

NCT04376190

AlAzharU 7712

Details and patient eligibility

About

to evaluate effect of low-level laser therapy (LLLT) on mandibular condylar volume and position after treatment of Class II malocclusion with Twin Block (TB) functional therapy via cone beam computed tomography (CBCT).

Materials and methods: Twenty eight growing patients, 14 boys and 14 girls ranged in age 9-12 years, were randomly divided into control group (mean initial age 10.64±1.36 years) and laser group (mean initial age 10.55 1.45 years). All patients treated with TB appliance where Gallium aluminum arsenide diode laser applied in one group weekly around TMJ region for 12 sessions in three months with set parameters: continuous 635 nm, 50 mW, 4.5J/cm2, 45 seconds/ point, total dose per side 11.25J. CBCT were obtained before and immediately after TB therapy, in addition to routine orthodontic records. Changes in TMJ and skeletal variables were analyzed and compared within and between both groups.

Full description

to evaluate the effect of low-level laser therapy (LLLT) on mandibular condylar volume and position after treatment of Class II malocclusion with Twin Block (TB) functional therapy via cone-beam computed tomography (CBCT).

Materials and methods: Twenty-eight growing patients, 14 boys, and 14 girls ranged in age 9-12 years, were randomly divided into control group (mean initial age 10.64±1.36 years), and laser group (mean initial age 10.55 1.45 years). All patients treated with TB appliance where Gallium aluminum arsenide diode laser applied in one group weekly around TMJ region for 12 sessions in three months with set parameters: continuous 635 nm, 50 mW, 4.5J/cm2, 45 seconds/ point, total dose per side 11.25J. CBCT were obtained before and immediately after TB therapy, in addition to routine orthodontic records. Changes in TMJ and skeletal variables were analyzed and compared within and between both groups.

Enrollment: 24 patients

Sex: All

Ages: 9 to 12 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Skeletal Class II (ANB°> 5°) with the normal maxilla (SNA°=82°±4°) and retrognathic mandible (SNB°< 78°).
• Overjet greater than 5 mm.
• Minimal crowding in dental arches (≤ 3 mm).
• The lower incisors should be on average inclination or slightly retroclined.
• All the patients were in stages II and III based on the modified cervical vertebral maturation stages(CVMS) according to Bacetti et al.

Exclusion criteria

• Previous history of orthodontic treatment.
• Congenitally missing or extracted permanent tooth (except third molars).
• Posterior crossbites or severe maxillary transverse deficiency.
• Severe facial asymmetry determined by clinical or radiographic examination.
• Poor oral hygiene.
• Systemic diseases that may affect orthodontic treatment results.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

---

24 participants in 2 patient groups

control group

No Intervention group

Description:

12 patients treated with twin block functional appliance without low-level laser application for 9 month

laser group

Experimental group

Description:

12 patients treated with twin block functional appliance with low-level laser application with the following set parameters; 635 nm wavelength in continuous-wave mode, 50 mw power output, 4.5 J/cm2 energy density, 11.25 J total dose per side, 45 seconds/ point, and 8 mm fiber optic tip diameter. The laser was applied at five points located within TMJ region on both right and left sides in contact with skin as follows: lateral, superior, anterior, posterior, and posterior- inferior points. Laser application was repeated weekly for three months according to a standard protocol

Treatment:

Radiation: low level laser therapy