- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02810015
Treatment of Temporo-Myofascial Disorder of Muscular Origin Using Botulinum Toxin: A Prospective Study
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Introduction Temporomandibular disorders (TMD) are a group of conditions involving the temporomandibular joint (TMJ), masticatory muscles and associated structures. This broad complex of functional disorders often affects the face and jaws causing chronic pain, earaches, headaches, migraines, neck pain, and dysfunction in many people 1,2,3,4,5,6. Conservative treatment for TMD is similar to that of other musculoskeletal conditions. Pharmacologic therapy includes the use of anti-inflammatory medications, muscle relaxants, or opioid analgesics7,8,9,10. Physical treatments comprise of dental splints, directed physiotherapy, moist heat therapy, soft diet, massage and acupuncture11,12,13,14,15,16,17,18,19,20,21,22,23,24,25. At the extreme end of the spectrum, surgical management includes arthrocentesis, arthroscopy and open joint procedures26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44. Some patients can find relief with a combination of these previously mentioned interventions; however, none of these have been proven to be consistently effective. Open joint procedures are not reversible while anti-inflammatory medications and narcotics can have undesirable side effects on the gastrointestinal and central nervous system, respectively. Furthermore, many patients suffering from severe chronic pain do not feel relief with even the strongest narcotic analgesics45,46.
TMD has a complex etiology consisting of components from internal derangement of the joint, arthralgia and/or a component of myofascial pain and muscle hyperactivity1,2,3,4. A treatment that has high specificity and low side effects directed solely at the muscular aspect, which presents with signs and symptoms of trigger points, clenching, and bruxism, could produce another avenue of intervention with significant potential. Recently, the use of botulinum toxin has proven effective and has the potential to be such an agent for treatment with patients suffering from TMD and other orofacial pain conditions47,48,49,50,51,52,53,54,55.
Botulinum toxins are exotoxins derived from Clostridium botulinum, a gram-positive, anaerobic, spore-forming organism. There are 8 different subtypes; type A (BTX-A) has been used in recent studies for the treatment of motor disorders such as cervical dystonia or the hyperactive muscular component of TMD53,54,55. The specific method of action of botulinum toxin is on peripheral synapses. In the synaptic cleft, the botulinum toxin is brought into the presynaptic cell by endocytosis. It acts by blocking the calcium induced release of acetylcholine by selective proteolysis of synaptomal-associated proteins (SNAP)47,48,4,50,51,52,53,54,55. Inhibition of acytelcholine thus causes an inhibition of muscular hyperactivity.
Botulinum toxin has a number of indications approved by the Food and Drug Administration such as the therapeutic treatment for cervical dystonia, cosmetic use such as glabellar lines and wide spectrum of off-label uses such as extracervical spasticities, cerebral palsy, post stroke spasticity, neurologic, dermatologic, and gastrointestinal disorders56. Off-label use of a licensed drug or biologic product occurs with a wide range of products57,58,59.
Objective of the Study We aim to treat TMD of muscular origin using Botulinum toxin injections in the trigger points.
Method Our study will enroll selective patients attending the Oral and Maxillofacial Surgery clinic at the Health Sciences Center and at the University of Manitoba College of Dentistry over a 2-year period. Subjects will be recruited from referrals coming to the Health Sciences Center and College of Dentistry. The design will be prospective study following subjective outcomes such as pain and orofacial function on a visual analog scale as well as objective outcomes such as maximal interincisal mouth opening, tenderness to palpation to the temporalis and masseter muscles, maximal bite force measured by electromyogram and the reduction in muscle bulk due to muscle disuse atrophy. These outcomes have an appreciable affect on the patient's quality of life and provide subjective and objective measurements for analysis and study.
Inclusion criteria for patient's enrolled in this study include: participant's with trigger points in their masticatory muscles including, but not limited to: masseter and temporalis either bilateral or unilateral and secondly, have tried conservative management for at least 3 months and have shown to be refractory to these interventions. Exclusion criteria include: participant's that do not satisfy the inclusion criteria, currently are breastfeeding or pregnant, participant's whose TMD is not muscular in origin, inability to speak or understand English, the inability to provide meaningful informed consent due to physical, cognitive or psychiatric disability, a previous known allergy to Botulinum toxin, multiple sclerosis, pre-existing neuromuscular disorders, Lambert-Eaton syndrome, or chronic centrally mediated neuralgic pain patients.
Before enrollment, informed consent will be obtained from each patient. Informed consent will consist of a thorough initial evaluation and interview. If the patient is assessed to be appropriate for the study the patient will be informed of all risks and potential consequences of the study. Additional information will be given regarding benefits, cost and time required. During the informed consent, the principal investigator and at least one supervisor will be in attendance to answer any questions. Patients will be allowed time to think about their decision and discuss with family members and their family physician. A future appointment can be made to obtain consent and will be witnessed by the principal investigator, a supervisor and an OMFS assistant that has no connection with the study.
On the initial assessment, multiple measurements will be taken (see clinical assessment form attached). Additionally, an appointment will be made for the patient to have their maximal bite force registered pre-injection with the use of EMG.
BTX-A will be reconstituted as directed by the manufacturer. 2.5 mL of diluent (0.9% Saline) per 100 U vial will be used to reconstitute the solution while swirling. This creates a solution with a concentration of 4 U/0.1 mL. Patients will be seated and all usual precautions of sterility and skin preparation will be completed (i.e. alcohol wipes) Injections will be administered unilateral and/or bilaterally in accordance with the topography of the corresponding muscles (temporalis and masseter) into areas of maximal tenderness and pain. Plastic single use insulin syringes with 30 gauge needles will be used to inject 30 U intramuscularly into each masseter, divided evenly into 5 sites and 20 U will be injected into each temporalis, divided evenly over 5 sites. Injections will be completed by the principal investigator and supervisors who will be trained in botulinum toxin injections.
Patients will have scheduled follow ups at 1 week, 1 month, 3 months and 6 months post-injection. An additional follow up call will be made the next day after injection. The clinical assessment form will be used by the principal investigator to take measurements at each follow up appointment, except EMG readings which will only be done at the initial assessment and 3 month follow up appointment. This will provide a total of 5 assessments (including the initial assessment). During this time period, patients will be asked to stop any treatment for their TMD other than analgesics as required.
Subjective pain scores will be assessed on a visual analog scale (VAS) where 0 is no pain and 10 is the worst facial or jaw pain they've ever experience. Subjective functional assessments will also be assessed with VAS where 0 means no limitation and 10 indicates severe limitation with scales for chewing, drinking, exercising, eating hard food, eating soft food, smiling or laughing, cleaning their teeth, yawning, swallowing and talking. Objectively, range of motion will be assessed with a Boley gauge between the same upper and lower incisor each time. Palpation tenderness will be objectively assessed in bilateral temporalis and masseter muscles. Pain to pressure will be ranked from 0 to 5, with 0 indicating no pain and 5 representing extreme debilitating pain. Addition of each score will give a composite score of the overall facial tenderness out of a maximal score of 24 (2 areas X 6 scores X bilaterally). All assessments will be completed by the same examiner every time at the same time of day. Lastly, a measurement of the facial width will be taken. A point inferior to each ear lobule bilaterally will be marked as well as a point on the menton will be chosen and recorded. The distance unilaterally from one lobule to menton will be measured for left and right sides and a total distance will also be calculated to assess facial width. This will be used to determine the cosmetic change due to disuse atrophy 60.
Side effects may include, but are not limited to: transient facial asymmetry during dynamic movements, dysphagia, ptosis, erythematous discoloration or edema at the injection site, rash, and difficulty chewing hard food 61. Every attempt will be made to insure injection of the botulinum in the appropriate site. Aspiration before each injection will help prevent any intravascular and systemic effects while proper patient positioning and proper site identification will help prevent unwanted side effects such as ptosis. If a rash develops, Benadryl will be the first line medication given immediately followed by a several day course of Benadryl at home. In the case of an emergent reaction, adequate management would be undertaken at the clinic and referral to an appropriate service if necessary. Due to passage across the placenta, the use during pregnancy is also contraindicated. All patient's who are currently breastfeeding or pregnant will be excluded from the study62.
Funding for the study will be provided by application to research grants through The University of Manitoba and the Canadian Association of Oral and Maxillofacial Surgeons.
Anticipated results We expect trigger points in these patients to disappear and the associated muscles to become partially paralyzed and relaxed. Consequently, we expect that the TMJ loading will be reduced and that the patient's overall functional ability will increase. We also expect that muscular hypertrophy volume from hyperactivity will decrease due to disuse atrophy and impact their cosmetic image positively. Overall, we hope these changes will result in a reduction in pain and headaches which will consequently improve the participant's diet, nutrition, psychological well being and quality of life.
We expect this study will be published in the International Journal of Oral and Maxillofacial Surgery and that results will be presented at the International meeting of Oral and Maxillofacial Surgeons in 2018.
Study Type
Enrollment (Anticipated)
Phase
- Phase 2
Contacts and Locations
Study Contact
- Name: Victor Le, DMD
- Phone Number: 2049143018
- Email: victor.le101@gmail.com
Study Contact Backup
- Name: Adnan Shah, DMD
- Phone Number: 204-963-1962
- Email: adnan.shah@umanitoba.ca
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Participant's with trigger points in their masticatory muscles including, but not limited to: masseter and temporalis either bilateral or unilateral and secondly
- have tried conservative management for at least 3 months and have shown to be refractory to these interventions.
Exclusion Criteria:
- participant's that do not satisfy the inclusion criteria
- currently are breastfeeding or pregnant
- participant's whose TMD is not muscular in origin
- inability to speak or understand English
- the inability to provide meaningful informed consent due to physical, cognitive or psychiatric disability
- a previous known allergy to Botulinum toxin
- multiple sclerosis
- pre-existing neuromuscular disorders
- Lambert-Eaton syndrome
- chronic centrally mediated neuralgic pain patients.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Botulinum Toxin A
BTX-A will be reconstituted as directed by the manufacturer.
2.5 mL of diluent (0.9% Saline) per 100 U vial will be used to reconstitute the solution while swirling.
This creates a solution with a concentration of 4 U/0.1 mL.
Patients will be seated and all usual precautions of sterility and skin preparation will be completed (i.e.
alcohol wipes) Injections will be administered unilateral and/or bilaterally in accordance with the topography of the corresponding muscles (temporalis and masseter) into areas of maximal tenderness and pain.
Plastic single use insulin syringes with 30 gauge needles will be used to inject 30 U intramuscularly into each masseter, divided evenly into 5 sites and 20 U will be injected into each temporalis, divided evenly over 5 sites.
Injections will be completed by the principal investigator and supervisors who will be trained in botulinum toxin injections.
|
BTX-A will be reconstituted as directed by the manufacturer.
2.5 mL of diluent (0.9% Saline) per 100 U vial will be used to reconstitute the solution while swirling.
This creates a solution with a concentration of 4 U/0.1 mL.
Patients will be seated and all usual precautions of sterility and skin preparation will be completed (i.e.
alcohol wipes) Injections will be administered unilateral and/or bilaterally in accordance with the topography of the corresponding muscles (temporalis and masseter) into areas of maximal tenderness and pain.
Plastic single use insulin syringes with 30 gauge needles will be used to inject 30 U intramuscularly into each masseter, divided evenly into 5 sites and 20 U will be injected into each temporalis, divided evenly over 5 sites.
Injections will be completed by the principal investigator and supervisors who will be trained in botulinum toxin injections.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Pain (Visual Analog Scale)
Time Frame: 3 months
|
Subjective pain scores will be assessed on a visual analog scale (VAS) where 0 is no pain and 10 is the worst facial or jaw pain they've ever experience.
Subjective functional assessments will also be assessed with VAS where 0 means no limitation and 10 indicates severe limitation with scales for chewing, drinking, exercising, eating hard food, eating soft food, smiling or laughing, cleaning their teeth, yawning, swallowing and talking.
|
3 months
|
Range of Motion
Time Frame: 3 months
|
Range of motion will be assessed with a Boley gauge between the same upper and lower incisor each time
|
3 months
|
Palpation tenderness
Time Frame: 3 months
|
Pain to pressure will be ranked from 0 to 5, with 0 indicating no pain and 5 representing extreme debilitating pain.
Addition of each score will give a composite score of the overall facial tenderness out of a maximal score of 24 (2 areas X 6 scores X bilaterally).
|
3 months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Facial Width
Time Frame: 3 months
|
A point inferior to each ear lobule bilaterally will be marked as well as a point on the menton will be chosen and recorded.
The distance unilaterally from one lobule to menton will be measured for left and right sides and a total distance will also be calculated to assess facial width.
|
3 months
|
Collaborators and Investigators
Sponsor
Investigators
- Study Director: Reda Elgazzar, DMD, University of Manitoba
Publications and helpful links
General Publications
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- Okeson JP. Occlusal appliance therapy. In: Duncan LL, editor. Management of temporomandibular disorders and occlusion. 4th ed. Philadelphia (PA): Mosby Publishing; 1998. p. 474-502.
- Major PW, Nebbe B. Use and effectiveness of splint appliance therapy: review of literature. Cranio. 1997 Apr;15(2):159-66. doi: 10.1080/08869634.1997.11746007.
- Nitzan DW, Price A. The use of arthrocentesis for the treatment of osteoarthritic temporomandibular joints. J Oral Maxillofac Surg. 2001 Oct;59(10):1154-9; discussion 1160. doi: 10.1053/joms.2001.26716.
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- McCarty WL, Farrar WB. Surgery for internal derangements of the temporomandibular joint. J Prosthet Dent. 1979 Aug;42(2):191-6. doi: 10.1016/0022-3913(79)90174-4.
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- Moses JJ, Lo HH, Lee J, Topper DC. Tomographic changes in the temporomandibular joint following arthroscopic surgery with lysis and lavage and eminentia release. J Orofac Pain. 1994 Fall;8(4):407-12.
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- Borodic GE, Acquadro MA. The use of botulinum toxin for the treatment of chronic facial pain. J Pain. 2002 Feb;3(1):21-7. doi: 10.1054/jpai.2002.27142.
- Ziegler CM, Haag C, Muhling J. Treatment of recurrent temporomandibular joint dislocation with intramuscular botulinum toxin injection. Clin Oral Investig. 2003 Mar;7(1):52-5. doi: 10.1007/s00784-002-0187-y. Epub 2003 Jan 25.
- Karacalar A, Yilmaz N, Bilgici A, Bas B, Akan H. Botulinum toxin for the treatment of temporomandibular joint disk disfigurement: clinical experience. J Craniofac Surg. 2005 May;16(3):476-81. doi: 10.1097/04.scs.0000157263.73768.64.
- Freund BJ, Schwartz M. Relief of tension-type headache symptoms in subjects with temporomandibular disorders treated with botulinum toxin-A. Headache. 2002 Nov-Dec;42(10):1033-7. doi: 10.1046/j.1526-4610.2002.02234.x.
- von Lindern JJ. Type A botulinum toxin in the treatment of chronic facial pain associated with temporo-mandibular dysfunction. Acta Neurol Belg. 2001 Mar;101(1):39-41.
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- Umstadt HE (2002) Botulinum toxin in craniomaxillofacial surgery. Mund Kiefer GesichtsChir 6: 236-240
Study record dates
Study Major Dates
Study Start
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Pathologic Processes
- Disease
- Physiological Effects of Drugs
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Peripheral Nervous System Agents
- Cholinergic Agents
- Membrane Transport Modulators
- Acetylcholine Release Inhibitors
- Neuromuscular Agents
- Botulinum Toxins
- Botulinum Toxins, Type A
- abobotulinumtoxinA
Other Study ID Numbers
- B2016:027
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