Abstract
The main aim was to evaluate the influence on occlusal contact area (OCA), maximum bite force (MBF), center of occlusal load (COL), and tooth pain after the nocturnal use of different mandibular advance appliances (MAAs) for snoring. Subjects were consisted of ten adult volunteers with mild snoring in Hiroshima University Hospital. Recordings of occlusal function were performed six times for two hours, that is, immediately and 5, 15, 30, 60, and 120 minutes after the nocturnal use of MAA. The subjects continuously scored their pain intensity on a 10 cm visual analogue scale (VAS) when MBF was measured. Comparing two MAAs, OCA and MBF were significantly larger in two-piece MAA than in one-piece MAA five minutes after removing the appliance. Significant difference in COL and VAS score compared to baseline disappeared more quickly with two-piece MAA than with one-piece MAA. In conclusion, it is shown that two-piece MAA could be superior to the one-piece one in terms of the degree side effect on occlusal function.
Highlights
Obstructive sleep apnea (OSA) is characterized by repetitive episodes of upper airway obstruction that occur during sleep, usually associated with a reduction in blood oxygen saturation [1]
Several studies have focused on the side effects of Mandibular advancement appliances (MAAs) related to temporomandibular joint (TMJ) discomfort and the masticatory muscles stiffness with difficulty in chewing immediately after the nocturnal use of MAAs [14,15,16]
George [17] reported that most OSA patients, after the use of MAA for a whole night, experience that the bite does not feel right upon awakening, but that it normalizes after breakfast
Summary
Obstructive sleep apnea (OSA) is characterized by repetitive episodes of upper airway obstruction that occur during sleep, usually associated with a reduction in blood oxygen saturation [1]. Mandibular advancement appliances (MAAs), aiming to enlarge the upper airway by repositioning the mandible forward, are known to be useful as a lifelong treatment tool for primary snoring and mild-to-moderate OSA [8,9,10,11]. Several studies have focused on the side effects of MAAs related to temporomandibular joint (TMJ) discomfort and the masticatory muscles stiffness with difficulty in chewing immediately after the nocturnal use of MAAs [14,15,16]. The primary aim was to compare the difference in mandibular movement of two-type MAAs when one-piece and two-piece MAAs are used. Secondary aim was to evaluate the influence on occlusal contact, bite force, and tooth pain after the nocturnal use
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