Clinical trial NCT06188897: Biomechanical Relationship Between Trunk Flexion and Mouth Opening: Pilot Study
Official title: Biomechanical Relationship Between Trunk Flexion and Mouth Opening: Pilot Study
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Hamstring Injury
Temporomandibular Joint Disorders
Stretch
Lead sponsor: University Rovira i Virgili
Sponsor class: OTHER
First posted: 2024-01-03
Enrollment: 60
Sex: ALL
Minimum age (years): 18
Maximum age (years): 26
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

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.

Eligibility criteria: 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.

Primary outcomes:
measure: Trunk flexion
timeFrame: 1 year
Secondary outcomes:
measure: Mandibular opening
timeFrame: 1 year
Other outcomes:
Locations:
city: Vilanova i la Geltrú
country: Spain
facility: Laura Menés Fernández
state: Barcelona
Study officials:
References:
citation: Espejo-Antunez L, Castro-Valenzuela E, Ribeiro F, Albornoz-Cabello M, Silva A, Rodriguez-Mansilla J. Immediate effects of hamstring stretching alone or combined with ischemic compression of the masseter muscle on hamstrings extensibility, active mouth opening and pain in athletes with temporomandibular dysfunction. J Bodyw Mov Ther. 2016 Jul;20(3):579-87. doi: 10.1016/j.jbmt.2015.12.012. Epub 2016 Jan 7.
citation: Rodriguez-Blanco C, Cocera-Morata FM, Heredia-Rizo AM, Ricard F, Almazan-Campos G, Oliva-Pascual-Vaca A. Immediate Effects of Combining Local Techniques in the Craniomandibular Area and Hamstring Muscle Stretching in Subjects with Temporomandibular Disorders: A Randomized Controlled Study. J Altern Complement Med. 2015 Aug;21(8):451-9. doi: 10.1089/acm.2014.0332. Epub 2015 Jun 2.