Myofunctional Therapy Training Using BROOM Screening
BROOM is a sweeping generalization used to identify patients who need a myofunctional therapy referral. While not definitive, it is easy to incorporate in a clinical hygiene appointment and can be completed by the time you finish your intra-oral and extra-oral examinations. The BROOM screening consists of 5 parts:
B: Bruxism / Occlusal Wear
O: Orally Defensive
O: Open Mouth Posture
M: Maxillary Transverse Width
B: Bruxism / Occlusal WearPatients who come in with complaints of tenderness in the muscles of mastication and are showing occlusal wear are generally recommended a traditional night guard. Many airway focused dental providers no longer utilize traditional night guards in their armamentarium. By conducting myofunctional therapy training with your staff, the patient who is showing signs of occlusal wear may be a candidate for referral. Checking for bruxism or occlusal wear is the first step in BROOM screening.
According to sleep medicine specialist Dr. Jerald Simmons, MD and sleep dental specialist Dr. Ronald Prehn, DDS, “when most patients exhibit obstructive respirations during sleep the mandible falls back bringing the back of the tongue with it. This triggers a series of events that in some people results in a reflexive attempt to open the airway by increasing masseter tone. This brings the mandible forward and, in many patients, improves respirations. We postulate [sic] that nocturnal bruxism is a compensatory mechanism of the upper airway to help overcome upper airway obstruction by activation of the clenching muscles which results in bringing the mandible, and therefore the tongue, forward.”
Myofunctional therapy can aid in the patency of the upper airway. According to Guimarães et al, 2018 “oropharyngeal exercises significantly reduce OSAS (obstructive sleep apnea syndrome) severity and symptoms and represent a promising treatment for moderate OSAS.” A clinical study conducted by Messina et al, 2017 documents the benefits of myofunctional therapy on bruxism. This study showed that myofunctional therapy can be “an effective therapeutic strategy regarding the treatment of muscle facial pain and hypertonia of the chewing and swallowing muscles. All treated patients had a reduction of facial pain and reduced the number of bruxism episodes per hour, and in many cases such episode disappeared.” Another indication to look for intra-orally is the presence of maxillary or mandibular tori. According to research, tori are associated with presence of abnormal tooth wear due to the abnormal pressure on the teeth.
R: RespirationNext check your patient's breathing by observing your patient in their most natural state while they are sitting in your dental chair.
- Are they breathing through their nose or their mouth?
- Do their breaths seem to be coming primarily from the chest or from the diaphragm?
- Are their breaths shallow?
- Are they audible?
In 1907, Dr. Alfred Rogers published Malocclusion of the Teeth, where he recognized the influence of mouth breathing on oral rest posture and successful orthodontic treatment. Optimal oral rest posture includes the entire tongue resting in the roof of the mouth, lips closed, and dominant nasal breathing. This posture should be maintained while awake and asleep. Correct oral rest posture is the goal of myofunctional therapy training, and therefore, should always be included in a patient's treatment plan who does not exhibit dominant nasal breathing patterns.
O: Orally DefensiveMany scenarios can lead to a positive answer to the next step in the BROOM screening. Can you think of a patient whose tongue is constantly battling you, or a patient whose lips are so tense you can hardly retract? How about fighting the lower lip to scale the mandibular anterior dentition? What if we told you that a gag reflex can be a patient's response to protect their own airway? The scenarios above may all be a sign of orofacial dysfunction and indicate the need for further myofunctional evaluation.
Patients with increased vertical growth tend to have an overactive mentalis muscle. Think of those patients with gummy smiles or retrognathic mandibles. An overdeveloped mentalis muscle may also form by serving as a compensatory pattern to keep the lips closed.
Lingual control and optimal lingual function play a crucial role in optimal craniofacial growth and development, mastication, swallowing, speaking, and keeping the upper airway open during sleep. Myofunctional therapy includes exercises to strengthen the tongue and orofacial muscles. Oropharyngeal exercises effectively modify tongue tone.
O: Open Mouth PostureOpen mouth posture can also be a sign of airway obstruction. By observing your patient, you may be able to see some of these signs.
- Are their lips together or apart?
- Where are their lips when you call their name, or when they sit in your dental chair?
- When you're speaking to them, how are they posturing their lips?
- Do they have a flaccid, or rolled out, lower lip?
- Are their lips dried or cracked?
- Are they applying Chapstick while in the dental operatory?
M: Maxillary Transverse WidthDoes your patient present with crowding? This is the final sign that your patient may benefit from myofunctional therapy. When measuring maxillary transverse width, we are measuring from tooth #3 to #14 on the maxillary arch. Dr. James A. McNamara gives us the range of 36 to 39mm indicating a maxillary arch that can accommodate a dentition without crowding or spacing.8 The simplest and quickest thing to do is to take a cotton roll and measure it with your periodontal probe. Cotton rolls are generally about 36-37mm.
The maxilla also makes up the floor and lateral walls of the nasal cavity. Generally, the size of the maxilla mirrors the size of the nasal cavity. If the maxilla develops narrowly, often, we will have an insufficient oropharyngeal space. When addressing the root cause of underdeveloped jaws, we must not ignore tongue rest posture. The tongue should live in the roof of the mouth. An analogy we have heard from Dr. Ben Miraglia speaks to this, “Your tongue should fit in the roof of your mouth, like your car fits in your garage”. In utero, the tongue begins to shape the structure of our jaws and nasal airway. The tongue pushes the palate anteriorly and laterally. It is the counterbalancing forces that allow our arches to reach their fullest potential and develop proper bone growth. The tongue is the architect, creating a scaffold for the development of a U-shaped arch, able to accommodate all thirty-two teeth.