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Dentomandibular sensorimotor dysfunction

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Dentomandibular Sensorimotor Dysfunction is a medical condition involving the mandible (lower jaw), upper three cervical (neck) vertebrae, and the surrounding muscle and nerve areas. There is a concentrated nerve center in this area called the trigeminal nucleus.This major pathway of nerves controls pain signals from the teeth, face, head, and neck, and carries them to the brain. Dentomandibular sensorimotor dysfunction refers to a condition in which an individual experiences chronic pain or stiffness from these nerve inputs as a result of dental force imbalances.[1]

Dental FoundationEdit

The dental foundation consists of teeth, muscles, and joints in the dentofacial (head and neck) area. The dental foundation is considered to be out of balance when one or more of the following conditions apply:

  • Advanced aging or disability of the muscles which open the jaw.
  • Movement or noises in the jaw joints which indicate the disks in the neck are moving, deformed, or swollen.
  • Tooth wear or breakage.
  • Limited range of motion in the jaw and cervical (neck) spine.
  • Painful or sore head and/or neck muscles with very sensitive spots referred to as trigger points.
  • Pain that stems from the trigeminal cervical nucleus.
  • Any lifestyle limitation related to the teeth, muscles, or joints of the head and neck.[2]

SymptomsEdit

There are many symptoms associated with DMSD conditions. The most commonly reported are:[3]

This condition affects all ages and both genders. However, females are more likely to suffer from DMSD. Individuals who have experienced chronic headaches and/or migraines without finding lasting relief through traditional medicine can be assessed for DMSD through a combination of objective tests, evaluations, and a comprehensive discussion of their symptoms, medical history, headache history, pharmacological background, and head health. Research used in sports medicine and rehabilitation allows dentists to address the population with DMSD symptoms.

The TruDenta System is a complete software and technology system that combines—and applies to treatment—neuroscience and systematic, objective assessment and monitoring. The physical examination is supported by findings from the mandibular range of motion (ROM) disability, cervical range of motion (digitally), and dental force analysis (TruDenta Scan).

Assessment ProtocolEdit

  • A physical examination with head health, headache, pharmacological and complete medical histories. Additionally,dental, periodontal, occlusal, orthodontic, and airway examinations are encouraged as part of the initial screening process.
  • Next, a panoramic radiograph (also called a curved surface tomograph) is used to identify or confirm dental conditions which may contribute to painful DMSD symptoms. Computed tomography (CT scans) can also be utilized at this point for further aid in assessment and treatment planning.
  • Muscle palpation is used to evaluate where the individual is experiencing trigger points. These are areas of high sensitivity in the facial, head, and neck muscles. When these areas are pressed, it causes pain either in that muscle (localized pain), or in another area (referred pain). A muscle palpation examination is performed to aid in the discovery of “latent trigger points”, or trigger points which cause no pain unless direct pressure is applied.

Digital PortionEdit

TruDenta Scan (T-Scan)Edit

This tool is used for digital force analysis to measure the presence and amount of imbalance at closing of the mouth, during closure, and during mastication (chewing). The computer displays the results of how the forces in the mouth spread along the arch, the center of force, the center of force trajectory, and the left/right force balance. This means the dentist can show patients which teeth are generating the most force, and facilitates the dentist’s knowledge of what adjustments need to be made to teeth and soft tissue to create a stable dental foundation.

Range of Motion (ROM) AssessmentEdit

This test digitally measures an individual’s cervical range of motion from a standing position and displays the results in terms of flexion and extension, left and right lateral flexion, and left and right rotation. Limited cervical range of motion is a disability, and being able to understand what is normal—and where their own mouth, head and neck are during the examination—helps people see how this disability is affecting their condition.

This is also when the amount a person can open their mouth is measured. Along with normal opening movement, the jaw should slide symmetrically from left to right at least 25% of the total mouth opening distance.

Finally, during the range of motion assessment, a record of jaw joint vibrations and sounds are made. Normal jaw joints glide without noise or vibrations.

Depending on the assessment findings, patients are classified as needing 1 of 4 levels of care (see Table 1: Levels of Dental Headache Care) to treat and manage their pain and balance their dental foundation. Every level has a regimented therapy protocol designed to provide the most effective, long-lasting care for each individual.

Once the type of headache pain and extent of dental foundation imbalance is determined, treatment options are discussed. Historically, the treatments for headache pain included one or a combination of herbal remedies, stress-reduction exercises, massage, acupuncture, non-steroidal anti-inflammatory drugs (NSAID), narcotic pain relievers, anti-seizure medications, chiropractic adjustments, anti-depressants or sedatives.

The combination of advanced dentistry techniques and sports rehabilitation-derived therapies used in treating dental force imbalances in dental headache care has resulted in a dentist reported 93% success rate in providing patients with real, lasting relief from their DMSD symptoms. The methods used control muscle force and force balance, restore proper function and range of motion, and change the way the brain perceives stimuli, so pain levels, dysfunction, and improper muscle activity return to normal. By balancing the muscles, joints, and teeth, and controlling the way the body feels pain in the head and neck areas, long lasting pain relief can be achieved.

Once the individual has had the proper dental adjustments to restore normalcy to the dental foundation, and has been prescribed and fitted for their at-home orthotic (worn in the mouth for the short term, typically only during the 4 to 12 week rehabilitation period) for muscle re-training, the sports rehabilitation-derived components of therapy begin.

TreatmentEdit

Therapeutic UltrasoundEdit

The goal of therapeutic ultrasound treatment is to restore circulation to sore, strained muscles through increased blood flow and heat. Another objective is to break up scar tissue and deep adhesions (areas where connective tissue fibers have formed over muscle) through sound waves. Therapeutic exposure to ultrasound reduces trigger point sensitivity and is considered a useful clinical tool for managing myofascial pain. Moreover, the ultrasound has also been shown to lessen the stiffness and discomfort of trigger points.[4]

Transcutaneous Electrical StimulationEdit

Sub-threshold micro-current stimulation reduces muscle spasms and referral pain through a low electrical signal that decreases lactic acid build-up and encourages healthy nerve stimulation. Micro-current electrotherapy is known to significantly aid in increasing mouth opening.[5]

Low Level Laser (light) TherapyEdit

Low Level Laser (light) Therapy decreases pain and inflammation, accelerates the healing of muscle and joint tissues by 25%-35%, and reconnects the brain stem’s neurological pathways, effectively inhibiting pain. Low-level laser therapy combined with electrical stimulation improves mouth opening in patients diagnosed with TMJ/D. The musculoskeletal system's natural healing ability decreases pain and promotes TMJ stability.[6]

Manual Muscle/Trigger Point TherapyEdit

Manual Trigger Point Therapy decreases and eliminates pain and tension in the trigger points by breaking up muscle knots and increasing blood flow. This decreases inflammation and pain in the muscles.[7]

As part of their in-office treatment,a dentist monitored homecare system/deprogrammer and intraoral orthotic device is given to patients for their own personal use, on their own time.

Table 1: Levels of Dental Force Imbalance and Dental Headache careEdit

  1. Patients will typically need a rehabilitation orthotic and some occusal adjustments
  2. Patients will typically need a few in-office treatments, a rehabilitation orthotic, and some occlusal adjustments
  3. Patients will typically need more in-office treatments, rehabilitation orthotic, a basic at-home care kit, and occlusal adjustments
  4. Patients will typically need a greater number of in-office treatments, a rehabilitation orthotic, a basic at-home care kit, a micro-currenrt stimulation kit, and occlusal adjustments.[8]

See alsoEdit

ReferencesEdit

  1. Sessle BJ. Mechanisms of oral somatosensory and motor functions and their clinical correlates. J Oral Rehab2006;33:243-61.
  2. Koolstra JH. Dynamics of the human masticatory system. Crit Rev Oral Biol Med.2002;13(4):366-76.
  3. Junge D. Oral sensorimotor function. Medico Dental Media International, Inc.:1998.
  4. Srbely JZ, Dickey JP, Lowerison M, et al. Stimulation of myofascial trigger points with ultrasound induces segmental antinociceptive effects: a randomized controlled study.Pain.2008;139(2):260-66.
  5. Dijkstra PU, Kalk WW, Roodenburg JL. Trismus in head and neck oncology: a systematic review. Oral Oncol.2004;40(9):879-89.
  6. Fikackova H, Dostalova T, Vosicka R, et al. Arthralgia of the temporomandibular joint and low-level laser therapy.Photomed Laser Surg.2006;24(4):522-27.
  7. Quinn C, Chandler C, Moraska A. Massage therapy and the frequency of chronic tension headache.American journal of Public Health2002;92(10):1657-61.
  8. DiMatteo AM, Montgomery MW. Understanding Assessing and Treating Dentomandibular Sensorimotor Dysfunction. Fort Lauderdale, Florida: Dental Resource Systems, Inc.:2012.
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