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Frequently Asked Questions
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    How do I find a dentist trained in Dental Sleep Medicine to refer my patients to?

    We have a network of trained sleep dentists that can provide oral appliance therapy to your patients. Please contact us for more information.

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    How well is my patient going to be able to sleep with the trays and attached mandibular positioner (i.e. motor) in their mouth?

    The motor, which is housed inside the MATRx Mandibular Positioner is NOT placed in the patient’s mouth; only the temporary, custom-fitted MATRx Titration Trays. The trays are attached to the mandibular positioner by mounting brackets extending from the front of the trays. The trays are comfortable and the patient is unaware of the attached light-weight mandibular positioner.

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    Is the MATRx dental titration procedure difficult for sleep techs to learn and master?

    No. The MATRx titration procedure is very similar to that used for CPAP titrations. Installation and on-site training are included in the price of the product.  In addition, every MATRx lab has access to resource documents and manuals that review the titration procedure. Our technical support representatives are also available 24/7 and can be contacted by phone or via email.

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    Is interpretation of the MATRx study similar to CPAP studies?

    Yes. Please refer to the MATRx Clinical Applications Guide for a review of the interpretive criteria and case study examples.

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    Is follow-up testing required for successful oral appliance patients after their MATRx study and fitting of their appliance?

    Given the high predictive accuracy of a MATRx study, follow-up testing is not usually required. However, in situations where follow-up testing is determined to be appropriate, a polysomnographic study is the gold standard. When a polysomnographic study is not available, an AASM compliant portable sleep recorder can be used.

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    Can a sleep tech take the impressions and fit the MATRx titration trays for the study?

    Yes, the temporary titration trays can be fit by a sleep tech that has been trained by a sleep dentist to perform tray fitting.

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    How do I clean the MATRx device between patients?

    Cleaning procedures for the MATRx system are included in the User Manual and follow standard cleaning procedures approved for use in Sleep Laboratories.

    Titration trays: are for single patient multi-use for one study only; please refer to your User Manual for tray cleaning instructions before and after taking impressions. Reuse of the trays for more than one study may compromise the system’s accuracy.

    Mandibular Positioner (motor) and cables: can be reused between patients; please refer to your User Manual for pre-cleaning, cleaning and disinfection procedures.

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    How well is the patient going to be able to sleep with the trays and attached mandibular positioner (i.e. motor) in their mouth?

    The motor is NOT placed in the patient’s mouth; only the trays. The trays are attached to mounting brackets extending from the front of the trays to the motor outside of the patient’s mouth. The custom-fitted dental titration trays are comfortable and the patient is unaware of the light-weight motor attached to the trays.

    To date, the device has been well tolerated by patients involved in MATRx clinical studies. The quiet, small incremental movements associated with a MATRx titration rarely cause EEG arousal or changes in sleep state.

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    For MATRx studies, do I need to use a nasal pressure cannula and a thermistor and/or thermocouple sensor?

    Yes, the AASM standards require the use of a nasal pressure cannula and an oro-nasal thermocouple device.

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    During a MATRx study, how do I know when I’ve reached a therapeutically effective protrusive distance for my patient?

    This is called the patient’s target protrusive position (i.e. OATRx Number). Your patient has reached this therapeutic “target” when you observe a clean window of REM sleep in the supine position (i.e. less than 2 apneas and or hypopneas during this period). Please refer to the MATRx Clinical Applications Guide to review the titration protocol and other important clinical considerations when conducting a MATRx study.

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    What is the OATRx number?

    The OATRx number is the minimum protrusive position at which the sleep physician feels confident that patient will receive effective oral appliance therapy based on application of the MATRx interpretive criteria.

    To determine the OATRx number (i.e. target protrusive position) from the MATRx study data, the sleep physician should review the full night of study data and evaluate the patient’s response to mandibular titration during REM and NREM sleep and in both the supine and lateral positions. This is similar to the review performed when determining a patient’s CPAP prescription following a CPAP titration.

    For more information, please refer to the case study section of the MATRx Clinical Applications Guide.

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    What is the primary benefit of using MATRx compared to the conventional approach for fitting and titrating custom oral appliances?

    The MATRx study offers a high degree of predictive accuracy (i.e. which patients will or will not be successful with oral appliance therapy) and also provides the sleep dentist with a target protrusive position that will result in the efficacious therapy. This means that the sleep dentist should be able to treat more patients, more effectively and in less time.

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    How does MATRx reduce the chair time associated with oral appliance titration?

    In many cases, the patient’s mandible can be moved immediately to the prescribed target protrusive position (TPP) eliminating the need for multiple office visits.

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    How can I learn how to fit MATRx titration trays?

    Please visit our YouTube channel for instructional videos on MATRx Titration Tray use. These instructional videos are also posted on the Titration Trays page of our website (scroll to the bottom of this page).

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    What is the MATRx target protrusive position?

    This is the mandibular protrusive position that will result in effective treatment of the patient’s OSA with a custom oral appliance (mandibular repositioning appliance). The sleep physician determines the patient’s target protrusive position, also known as the OATRx Number, when performing the MATRx study interpretation.  The sleep dentist will use the target protrusive position to fabricate the patient’s custom oral appliance to their therapeutic position.

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    How accurate is the target protrusive position (i.e. OATRx number) provided from the MATRx study in predicting the therapeutic position for an oral appliance?

    In the most recent clinical study (n=67) the efficacy of the MATRx target protrusion position was 93% in patients correctly predicted to be therapeutically successful.

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    What is the vertical separation adjustment of the MATRx titration trays?

    The vertical separation is 3-4mm, depending on the amount of bite registration material used.

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    Can the MATRx device be used on patients that normally breathe through their mouths?

    Currently, use of the MATRx system is contraindicated in patients who are not able to breathe comfortably through their nose during sleep.

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    Can I use any type of impression material?

    The MATRx trays have been designed for use with Henry Schein Blu-Bite HP Fast Set only, which sets in approximately 20-30 seconds.

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    During the patient’s dental appointment for MATRx titration tray fitting, does the dentist need to conduct full exams and x-rays?

    No. At the initial visit you will need to perform an oral exam to determine if the patient is a suitable candidate for an oral appliance. Once candidacy is confirmed, you will: 1) fit the patient’s ’s MATRx titration trays 2) prepare impressions to customize the patient’s bite within the trays and ensure adequate tray retention 3) record the patient’s scale readings (i.e. this will be the range of motion used by the sleep tech when conducting the MATRx study).

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    Can the patient’s MATRx titration trays be used as the bite registration?

    Yes, most dental labs should accept the MATRx trays as the bite registration however you should contact the lab fabricating your appliances to confirm this change in practice is understood and accepted.