title: Comparison between mono-bloc and bi-bloc mandibular advancement devices for obstructive sleep apnea.
abstract: Although mandibular advancement device (MAD) is widely used, there are a few papers comparing the efficacy and compliance at the same time according to the type of MAD. The aim of this study is to compare the efficacy and compliance between mono-bloc and bi-bloc MAD in the treatment of obstructive sleep apnea (OSA). Ninety-three patients who treated with mono-bloc MAD and 60 patients with bi-bloc MAD from January 2007 through September 2011 were retrospectively enrolled. All the patients underwent full-night polysomnography(PSG) before and 3 months after MAD was applied. The response rate was significantly higher in the patients using mono-bloc than those using bi-bloc MAD (77.4 vs. 58.3 %; P = 0.012). In contrast, the compliance rate of MAD use was significantly higher in the patients using bi-bloc than those using mono-bloc MAD (68.8 vs. 83.3 %; P = 0.044) at 1 year. According to the severity of OSA, the response rate was significantly higher in severe OSA than in mild to moderate OSA (P = 0.033 for mono-bloc MAD and P = 0.048 for bi-bloc MAD). However, there was no difference in the compliance between mild to moderate OSA and severe OSA. Our study showed that mono-bloc MAD was superior to bi-bloc MAD in efficacy while bi-bloc MAD is superior to mono-bloc MAD in compliance. We propose that both the efficacy and compliance should be considered in using MAD for treatment of OSA.
authors: Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 166, Kumiro, Bundang-gu, Seongnam, 463-707, South Korea.
authors: Woo Hyun
authors: WH
authors: Lee
authors: Jee Hye
authors: JH
authors: Wee
authors: Chul Hee
authors: CH
authors: Lee
authors: Min-Su
authors: MS
authors: Kim
authors: Chae-Seo
authors: CS
authors: Rhee
authors: Pil-Young
authors: PY
authors: Yun
authors: In-Young
authors: IY
authors: Yoon
authors: Jeong-Whun
authors: JW
authors: Kim
mesh_terms: D000328:Adult; D004864:Equipment and Supplies / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D019186:Mandibular Advancement / Q000295:instrumentation; D008875:Middle Aged; D010349:Patient Compliance; D017286:Polysomnography; D012189:Retrospective Studies; D020181:Sleep Apnea, Obstructive / Q000628:therapy*; D016896:Treatment Outcome