None listed
Conditions
Brief summary
We hypothesized that, in correcting tooth alignment, orthodontic treatment will affect the normal resting position of the jaw and the entire Cranio-Cervico-Mandibular Unit, favouring extension of the high cervical segment and the tendency to prognathism, so leading to a Forward Head Posture. This correlates with a retraction of the suboccipital muscles and a decreased pressure pain threshold of the greater occipital (GO) nerve, a threshold which we shall find to be improved following application of the Suboccipital muscle inhibition technique. Thus, the objective of the study was to determine and analyze the differences in head posture and in the PPT of the GO nerve following an intervention by a SMI technique among asymptomatic subjects with a history of having used orthodontics As suggested by Saiz LLamosas et al. the study of the potential effects and benefits of myofascial induction techniques should be started in pain-free subjects to avoid any sensitization.
Interventions
Suboccipital muscle inhibition technique (SMI technique)
With the patient supine, the therapist sits at the head of the table and places the palms of her hands under the subject's head, her fingers contacting the occipital condyles. Then, the therapist locates with the middle and ring fingers of both hands the space between the occipital condyles and the spinal process of the second cervical vertebra. Then, with the metacarpophalangeal joints in 90degrees flexion, she rests the base of the sk
Suboccipital muscle inhibition technique (SMI technique) With the patient supine, the therapist sits at the head of the table and places the palms of her hands under the subject's head, her fingers contacting the occipital condyles. Then, the therapist locates with the middle and ring fingers of both hands the space between the occipital condyles and the spinal process of the second cervical vertebra. Then, with the metacarpophalangeal joints in 90degrees flexion, she rests the base of the skull on her hands and exerts a constant, but not painful, pressure ventrally, maintaining the index, middle, and ring fingers of both hands extended and together. A very slight traction can be added cranially to decongest the suboccipital zone. During the SMI technique, the subject is asked to keep his eyes closed to avoid eye movements affecting the suboccipital muscle tone. We set an intervention time of four minutes. The intervention procedure will be performed only once in order to assess the immediate effects of the technique
Sponsors
University of Sevilla
Study design
Allocation
Randomised controlled trial
Intervention model
Parallel
Primary purpose
Treatment
Masking
Blinded (masking used) (Subject, Outcomes Assessor)
Eligibility
Sex/Gender
All
Age
18 Years to 35 Years
Healthy volunteers
Yes
Inclusion criteria
(i) older than 18 years old (ii) a history of having used orthodontics
Exclusion criteria
(i) a history of whiplash injury; (ii) a history of degenerative disorders of the central and/or peripheral nervous system; (iii) a history of cranial vault, craniofacial, temporomandibular joint, or any level of spinal fractures and/or surgery; (iv) suffering or having suffered osteitis, or cranial-vault, craniofacial, or temporomandibular joint rheumatic or tumoural diseases; and (v) consumption of analgesics or anti-inflammatory drugs within 48 hours prior to data collection
Outcome results
None listed