Effect of an adjustable mandibular advancement appliance on sleep bruxism: a crossover sleep laboratory study.

Abstract

PURPOSE:

The objective of this experimental study was to assess the efficacy and safety of a reinforced adjustable mandibular advancement appliance (MAA) on sleep bruxism (SB) activity compared to baseline and to a mandibular occlusal splint (MOS) in order to offer an alternative to patients with both tooth grinding and respiratory disorders during sleep.

MATERIALS AND METHODS:

Twelve subjects (mean age: 26.0 +/- 1.5 years) with frequent SB participated in a short-term (three blocks of 2 weeks each) randomized crossover controlled study. Both brain and muscle activities were quantified based on polygraphic and audio/video recordings made over 5 nights in a sleep laboratory. After habituation and baseline nights, 3 more nights were spent with an MAA in either a slight (25%) or pronounced (75%) mandibular protrusion position or with an MOS (control). Analysis of variance and Friedman and Wilcoxon signed-rank tests were used for statistical analysis.

RESULTS:

The mean number of SB episodes per hour was reduced by 39% and 47% from baseline with the MAA at a protrusion of 25% and 75%, respectively (P < .04). No difference between the two MAA positions was noted. The MOS slightly reduced the number of SB episodes per hour without reaching statistical significance (34%, P = .07). None of the SB subjects experienced any MAA breakage.

CONCLUSION:

Short-term use of an MAA is associated with a significant reduction in SB motor activity without any appliance breakage. A reinforced MAA design may be an alternative for patients with concomitant tooth grinding and snoring or apnea during sleep.

• Authors: Anaïs Landry-Schönbeck, Pierre de Grandmont, Pierre H Rompré, Gilles J Lavigne
• Journal: The International journal of prosthodontics (Int J Prosthodont) 2009 May-Jun Vol. 22 Issue 3 Pg. 251-9 ISSN: 0893-2174 [Print] United States
• PMID: 19548407 (Publication Type: Comparative Study, Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)

Topics

• Adult
• Centric Relation
• Cross-Over Studies
• Electromyography
• Female
• Humans
• Jaw Relation Record
• Male
• Mandibular Advancement (instrumentation)
• Masseter Muscle (physiology)
• Occlusal Splints
• Orthodontic Appliance Design
• Polysomnography
• Safety
• Sleep Apnea Syndromes (therapy)
• Sleep Bruxism (therapy)
• Sleep Stages (physiology)
• Snoring (therapy)
• Treatment Outcome