Hamstring Injury, Temporomandibular Joint Disorders, Stretch
Conditions
Brief summary
The aim of the present study is to analyze if there is a biomechanical relationship between trunk flexion and buccal opening and to observe if there is an improvement of trunk flexion by performing the sit and reach test when stretching the masticatory muscles.
Detailed description
The study design is made up of a double-blind clinical trial with 60 participants randomly divided into two groups of 30 people each (Treatment group and Control group). Basal measurements of the mouth opening were taken with a vernier caliper and the trunk flexion measurements were taken by means of the sit and reach test. These measurements were carried out again after the intervention, which consisted of self-stretching of the masticatory muscles for the Treatment group and an occlusion of the mouth for the Control group. In the results there was an increase in the trunk flexion compared to the initial values in both groups (Treatment group 2.8 (1.51), Control group 1.97 (2.31) and this increase was greater in the Treatment group even though the difference with the Control group was not statistically significant. Therefore, the stretching of the masticatory muscles does not cause an immediate increase in the degree of trunk flexion measured by the sit and reach test. As a consequence, we cannot confirm the existence of a biomechanical relationship between trunk flexion and mouth opening.
Interventions
OTHERSelf-stretching of the masticatory musculature
If the subject belonged to the Treatment group, he was instructed to self-stretch the masticatory muscle. This stretch consisted of introducing three knuckles of the non-dominant hand between the incisors for two minutes while sitting.
The control group was asked to introduce only two knuckles in the oral cavity and perform a mandibular occlusion, an intervention that serves as a simulated stretch in said group.
Sponsors
University Rovira i Virgili
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to 26 Years
Healthy volunteers
Yes
Inclusion criteria
1. Being between 18 and 26 years old (both included). 2. Having signed the consent form. 3. Being able to introduce three knuckles of the non-dominant hand between the incisors.
Exclusion criteria
1. Having a musculoskeletal injury in the lower extremity and / or in the jaw. 2. Being in the process of receiving physiotherapy treatment and / or having undergone any odontologic or maxillofacial surgery in the last month. 3. Having suffered dislocations, painful clicks or being diagnosed with some type of temporomandibular joint (TMJ) dysfunction. 4. Having hypermobility in the temporomandibular joint (TMJ) that is, the measurement of the buccal opening being greater than 60 mm.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Trunk flexion | 1 year | Trunk flexion in cm, taken by using the sit and reach drawer (Eve-que). The measurements were made three consecutive times with an interval of five seconds between them. The result of the arithmetic average of the three measurements was the one that was accounted for in the study. For the measurement of trunk flexion, the subject was placed on the floor with his back against the wall and having the soles of both feet in contact with the drawer. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Mandibular opening | 1 year | Mandibular opening in mm., assessed using the vernier caliper (INCUTEX Germany GmbHl). The measurement was made three consecutive times with an interval of five seconds between them. The result of the arithmetic average of the three measurements was the one that was caliper (corresponding to 0 of the ruler) was placed at the upper end of the lower central incisors and measured to the edge of the corresponding central incisor. |
Countries
Spain
Outcome results
None listed