Low-level Laser Therapy With a 635nm Diode Laser on Orthodontic Mini-implants Stability.

Wroclaw Medical University20 enrolled

Overview

The study aimed to clinically estimate an influence of a 635nm diode laser on the primary and secondary stability of orthodontic mini-implants placed in a maxilla, to assess mini-implants failure rate (mini-implant loss) and to evaluate a pain level after the treatment. The randomized clinical split-mouth trial included 15 subjects, 30 implants (Dual Top Anchor System, Seoul, Korea) with a diameter 1.4mm and length of 10mm. Mini-implants were placed in the area of the attached gingiva between the second premolar and first molar teeth 2 mm below the mucogingival junction of both sides of the maxilla in 20 patients (13 women and 7 men; age: 32.5 ± 6.1 years).

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Enrollment

Conditions

Malocclusion, Angle Class II

Interventions

Eligibility

Sex: ALLHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * patients with class II malocclusion defect requiring lateral maxillary teeth distillation based on the use of orthodontic mini-implant; * the patients were treated first time using fixed orthodontic appliance; * no systemic diseases; * were not using anti-inflammatory drugs; Exclusion Criteria: * had used antibiotics in the previous 24 months; * smokers; * had history of radiotherapy, * taking bisphosphonate medication

Outcomes

Primary Outcomes

stability of orthodontic mini-implants

The mini-implants stability was estimated employing a Periotest device (Medzintechnik Gulden e K, Modautal, Germany). The Periotest measurement system includes the sound formed from contact between an object and a metallic tapping bar in a handpiece, which is electromagnetically driven and electronically verified. The Periotest response detection is analyzed through a fast Fourier transform (FFT) algorithm. Simply put, the Periotest answer to tapping is estimated by an accelerometer and then analyzed. The signal generated by tapping is then transformed to a value called the Periotest value (PTV), which depends on the damping characteristics of the peri-implant tissue. \[27\] The Periotest Test values (PTVs) are based on a numerical scale ranging from -8 to +50, defined by mathematical computation. The lower Periotest values indicate higher implant stability and thereupon the higher absorption effect of the target objects.

Time frame: 60 days

Secondary Outcomes

Pain level

Immediately after the mini-implants placement, each patient received a questionnaire for individual pain assessment (the numeric rating scale, NRS-11, grade level 0-10). The maximum pain level was measured at both sides of the maxilla during the first day after the treatment. The NRS-11 scale consists of a conscious, subjective assessment of the pain experienced; therefore, it is used in the case of patients over ten years old. A rating of 0 signifies no pain, 1-3 represents mild pain, 4-6 moderate pain, and 7-10 severe pain.

Time frame: 24 hours

mini-implants loss