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Sleep and Breathing

, Volume 20, Issue 3, pp 911–919 | Cite as

The effectiveness of different mandibular advancement amounts in OSA patients: a systematic review and meta-regression analysis

  • Maria Lavinia Bartolucci
  • Francesco Bortolotti
  • Eugenia Raffaelli
  • Vincenzo D’Antò
  • Ambra Michelotti
  • Giulio Alessandri Bonetti
Sleep Breathing Physiology and Disorders • Original Article

Abstract

Purpose

The therapy with mandibular advancement devices (MADs) represents a treatment option for patients with obstructive sleep apnea (OSA). The literature does not provide evidence regarding the most effective mandibular advancement; therefore, the aim of this systematic review with meta-regression was to investigate the effectiveness of different mandibular advancement amounts in reducing apnea-hypopnea index (AHI) in OSA patients.

Methods

An electronic search was performed in MEDLINE, Cochrane Database, Google Scholar Beta, ISI Web of Knowledge, Scopus, and LILACS to select randomized controlled trials (RCTs) investigating the efficacy of MADs in reducing AHI in adult OSA patients. Inclusion criteria were the diagnosis of OSA and success evaluation performed with a polysomnography, follow-up of maximum 12 months, and protrusion amount reported as a percentage of the maximum mandibular advancement. The quality of evidence was evaluated using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) methodology. The success rate of each study was computed: [(mean AHI at baseline-mean AHI after treatment)/mean AHI at baseline].

Results

Thirteen RCTs performing advancements from 50 to 89 % of maximum mandibular protrusion were included. The meta-regression analysis showed that advancement amounts higher than 50 % do not significantly influence the success rate (Q = 0.373, p = 0.541). According to the GRADE score system, the quality of evidence resulted to be moderate.

Conclusion

The AHI improvement resulted to be not proportional to the mandibular advancement increase. It is plausible that the success of the therapy is influenced by a combination of variables that need closer study.

Keywords

Obstructive sleep apnea Mandibular advancement device Sleep disorders Sleep disordered breathing Temporomandibular disorders 

Notes

Compliance with ethical standards

The manuscript does not contain clinical studies or patient data.

Conflict of interest

The authors declare that they have no competing interest.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Maria Lavinia Bartolucci
    • 1
  • Francesco Bortolotti
    • 1
  • Eugenia Raffaelli
    • 2
  • Vincenzo D’Antò
    • 1
  • Ambra Michelotti
    • 1
  • Giulio Alessandri Bonetti
    • 2
  1. 1.Department of Neurosciences, Reproductive Sciences and Oral Sciences, Section of OrthodonticsUniversity of Naples “Federico II”NaplesItaly
  2. 2.Department of Biomedical Sciences, Section of OrthodonticsUniversity of BolognaBolognaItaly

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