Temporomandibular Dysfunction Clinical Trial
Official title:
TCM for TMD: A Multi-Site Whole Systems Trial
This study seeks to evaluate the benefits of different combinations of a Self Care program, involving individually targeted education and support, plus Traditional Chinese Medicine, in terms of patients' experience and outcomes in short-term follow-up (8 weeks) and long-term follow-up (18-months). The study seeks to evaluate the benefits and drawbacks of different patterns of stepped care, which means different levels of care depending on patients' responses at various time-points in the study, which might be used by clinicians treating in the future.
Studies of temporomandibular disorders (TMD) have shown that chronic pain in the
temporomandibular joint (TMJ) and/or masticatory muscles affects more than 10% of adults at
any one time and that one-third of adults will experience TMD over their lifespan (Von Korff
et al. 1988). TMD includes a wide range of symptoms: facial pain, jaw-joint pain, headaches,
earaches, dizziness, masticatory musculature hypertrophy, limited mouth opening, closed or
open lock on the TMJ, abnormal occlusal wear, clicking or popping sounds in the jaw joint,
and other complaints (NIH 1996). Although the etiology is poorly understood, longitudinal
data suggest that TMD is an enduring, recurrent condition and a resistant problem for many
(Dworkin et al. 1992a; Dworkin et al. 1989; Moss 1982; Gale 1978), and it affects
individuals in all socioeconomic and ethnic groups (Smith & Syrop 1994). In a study of TMD
patients in Kaiser Permanente Northwest (KPNW) in 1990-1995, the mean age was 40.5 years,
and 80% of the patients were female. TMD subjects used 1.6 times the services of other
health plan members (White 2001).
The Research Diagnostic Criteria for TMD (RDC/TMD) proposed by Dworkin et al. (Dworkin &
LeResche 1992b) uses a dual axis system for diagnosing and classifying TMD patients. Axis I
assigns physical diagnoses of the most commonly occurring masticatory muscle and/or TMJ
disorders (arthralgia, arthritis, and arthroses of the TMJ). Axis II assesses behavioral,
psychological and psychosocial factors; functional mandibular limitations; psychological
distress, including depression; and Graded Scale of Chronic Pain (GCP) (Von Korff et al.
1992). The RDC/TMD criteria for Axes I and II have been used in numerous clinical research
studies around the world (Ohrbach & Dworkin 1998; List et al. 1996; Rudy et al. 1995;
Garofalo & Wesley 1998; Yap et al. 2002). An NIH-supported international consortium of
RDC/TMD clinical researchers has been established to foster multinational studies of TMD
using as their core the RDC/TMD standardized methods and criteria
(http://www.rdc-tmdinternational.org/). The RDC/TMD has been suggested as a model system for
the diagnosis and assessment of all chronic pain conditions (Garofolo & Wesley 1997;
Dworkin, Sherman et al. 2002). The RDC/TMD is being used in this study for the primary
endpoint.
Epidemiological studies of TMD have focused on estimating prevalence and describing
characteristics of persons with and without the condition (Carlsson & LeResche 1995). In
more than 75% of the studies reviewed, TMD was not adequately defined. Epidemiologic and
clinical studies of TMD confirm its fundamental status as a chronic pain problem (Bell 1986;
Fricton et al. 1987; Dworkin et al. 1992a). Yap et al. (2003) found that about 39% of TMD
patients also are depressed, and 55% exhibit elevated levels of somatization. Similarly, Lee
et al. (1995) found that TMD patients frequently present ear pain, neck pain, shoulder pain,
headaches, and previous head or neck trauma.
In spite of a number of TMD clinical trials, no approach has been found to persistently and
significantly reduce the pain and disability of this condition. Our recent phase II RCT
(n=110 women) showed that Traditional Chinese Medicine (TCM), including acupuncture and
herbs, was comparable to or better than comprehensive specialty usual care in reducing pain,
and better in improving disability. The improvements did not persist, however, once TCM
treatment ended. We hypothesize that this may have been due in part to their lack of
education in self-care management. Thus, when their pain returned, they knew of no other
option than returning to their TCM practitioner which was not permitted under the protocol.
This suggests that the appropriate way to incorporate TCM into TMD care should include a
self-care component for all participants. This proposal tests TCM versus self-care
management (SC) in a realistic manner that is consistent with an integrative, stepped care
strategy, one that begins with a minimal self-care intervention and increases the intensity
in relation to patient needs. At multiple assessment points, participants not already on TCM
will be randomized to self-care or TCM depending on their self-reported TMD pain levels.
This study design is more clinically meaningful than a customary two-group randomization,
which does not consider patient outcomes (see study Schema below).
We propose a multi-site (Tucson and Portland) phase II trial (n=150) that will evaluate the
potential short-term pain and disability benefits of TCM and follow up for 18 months to
compare long-term TCM to self-care management. Our specific hypotheses are: (1) among
patients who fail to adequately improve on self-care management, those randomized to TCM
will have less pain and disability over the short term (8 weeks) than those randomized to
enhanced or extended self-care (SC); (2) patients placed on TCM due to inadequate
improvement on SC will show long-term (12-18 months) outcomes similar to those continuing to
benefit from SC. We will expand the patient population beyond our previous study to include
both men and women, as well as individuals who have received previous TMD care (not TCM) and
continue to experience TMD pain.
The TCM arm will incorporate whole systems research, which attempts to understand all
components of the system of care in relation to the patient experience. Specific domains
that will be considered in this study include patient-practitioner interaction,
patient-centered outcomes, and the process of diagnosis and treatment as it proceeds through
time and varies by practitioner.
;
Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment
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