Oropharyngeal Airway Volume Following Orthodontic Treatment: Premolar Extraction Versus Non-Extraction

Shannon, Thomas Patrick

doi:10.21007/etd.cghs.2012.0284

Cited by 3 publications

(4 citation statements)

References 72 publications

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“…After full‐text appraisal, 12 articles were excluded due to the following reasons: Full text not in English Treatment group below 16 years old Single‐arch extraction …”

Section: Resultsmentioning

confidence: 99%

Effects of bicuspid extractions and incisor retraction on upper airway of Asian adults and late adolescents: A systematic review

Song

Yap

2019

J of Oral Rehabilitation

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ObjectivesThis systematic review aimed to assess the effects of bicuspid extractions and incisor retraction on airway dimension, hyoid position and breathing of adults and late adolescents.MethodsThe review was conducted according to PRISMA guidelines. Eight databases including PubMed, EMBASE, Web of Science and Scopus were searched to August 2018. Minimum age of participants was 16 years. The intervention was dual‐arch bicuspid extractions with incisor retraction. Outcomes were airway dimension, hyoid position and breathing assessment.ResultsAll nine publications meeting inclusion criteria were from Asia. They were divided into three Asian subregions. All East Asian lateral cephalometric studies reported anteroposterior airway narrowing at the oropharynx and sometimes the hypopharynx. However, the narrowing was small, comparable to measurement errors, and highly variable. Two out of three East Asian computed tomography (CT) studies described reductions in airway dimensions. The single functional breathing study showed increased simulated flow resistance after incisor retraction in East Asians. South Asian studies had mixed findings, with some reporting significant airway narrowing. The single study from West Asia found no significant airway or hyoid changes.ConclusionsAirway response to bicuspid extractions and incisor retraction varied substantially when assessed with cephalometry. CT measurements present larger effect sizes and smaller variations, providing stronger evidence of airway narrowing. Orthodontic extractions for incisor retraction may be more frequently indicated in Asia, and East Asians seem particularly susceptible to airway narrowing and postero‐inferior hyoid movement with incisor retraction. Better designed CT studies are needed for confirmation due to small effect size and large variability.

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“…After full‐text appraisal, 12 articles were excluded due to the following reasons: Full text not in English Treatment group below 16 years old Single‐arch extraction …”

Section: Resultsmentioning

confidence: 99%

Effects of bicuspid extractions and incisor retraction on upper airway of Asian adults and late adolescents: A systematic review

Song

Yap

2019

J of Oral Rehabilitation

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“…A vast majority of articles published included growing individuals in their studies, which may explain the negative association between extraction orthodontic and pharyngeal size reduction. Rapid growth and different growth rates of the airway in growing individuals may have played a pivotal role in masking and confounding the effect on the upper airway following teeth extractions.45 On the other hand, the upper airway ceases its growth in adult patients [19,24,29]. Therefore, this systematic review excluded growing patients to assess and obtain results as accurately as possible.…”

Section: Discussionmentioning

confidence: 99%

“…Varying growth rates in adolescent patients may lead to misinterpretation of the actual impact of dental extraction on the airway [27,28]. On the other hand, multiple studies reported that the upper airway ceased its growth in adult patients [19,24,29].…”

Section: Introductionmentioning

confidence: 99%

Effects of Four First Premolar Extraction on the Upper Airway Dimension in a NonGrowing Class I Skeletal Patients: A Systematic Review

Choi¹,

Lee²

2022

JOMDR

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Objective: Orthodontic treatment aims not only to treat one's malocclusion and facial aesthetics but also to maintain or improve the patient's airway patency. This review aims to evaluate post-treatment changes in the position of hyoid bone and oropharyngeal airway size and dimensions associated with fixed orthodontic treatment with four first bicuspid extractions in non-growing Class I skeletal bimaxillary protrusion individuals. Methods: Electronic databases including Embase, Web of Science, PubMed, and Scopus were used to research published articles. Included studies assessed the post-treatment effects of four first bicuspid extractions with maximum anchorage on pharyngeal airway dimensions in non-growing patients. Relevant data were obtained, summarised, and analysed from the included studies. © 2020 Terese Winslow LLC, U.S. Govt. has certain rights. OSA is one of the sleep-breathing disturbances caused by collapsing of the upper airway during sleep, characterised by cessation of airflow with persistent respiratory effort, oxygen de-saturations, sleep arousals and sleep fragmentation [4]. Although OSA is a multifactorial disorder associated with obesity, age, facial morphology, airway collapsibility, and neuromuscular feedback, the size of the oropharyngeal airway is highly associated with OSA severity [5-12].Results: Six articles were selected in this systematic review after meeting the requirements of the inclusion criteria. Conclusions: Four bicuspid extractions followed by maximum anchorage involves predominant retraction of the anterior segment of the arches in non-growing skeletal Class I bimaxillary protrusion cases. Extraction of four first premolars led to retraction of the anterior segment and the retroclination of anterior teeth, which narrowed the pharyngeal airway dimensions. After such treatment, the hyoid bone position changes remain inconclusive, which warrants further studies.

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“…A previous study 12 have demonstrated that extraction treatment with maximum anchorage may causes retraction of tongue position and upper airway narrowing. However, other studies 13,14 have shown that oropharyngeal dimensions have not been affected by extractions. Dental arch dimensional changes attributed to orthodontic treatment are essential for the orthodontist.…”

Section: Introductionmentioning

confidence: 87%

The Influence of Dental Arch Dimensional Changes on Pharyngeal Airway After Extraction Treatment In Class II Division 1 Malocclusions

Mahlawy

2023

Advanced Dental Journal

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Objectives:The aim of the study was to evaluate the influence of dental arch dimensional changes on pharyngeal airway after extraction treatment in non growing class II division 1 cases. Materials and Methods:Pre and post treatment lateral cephalometric radiographs and study casts of twenty eight adult female patients of mean age 21 +/-3 years with class II division 1malocclsions whom underwent fixed orthodontic treatment with extraction of four first premolars were included in this study. Pre and posttreatment lateral cephalograms were digitally analyzed to assess the changes in the upper and lower pharyngeal airway space. The arch perimeter and depth were measured on the pre and posttreatment scanned study models. Descriptive statistics were used to analyze the readings. Student's paired t-test was done to compare the pre and posttreatment mean values of the measurements. Results: Statistical analysis revealed an insignificant increase in the upper airway and insignificant decrease in the lower airway between pre and post treatment cephalometric measurements. On the other hand, a highly significant decrease was found in the maxillary and mandibular arch perimeter, it also showed a significant decrease in the maxillary and mandibular arch depth between pre and posttreatment values. Conclusion:The reduction in the arch perimeter and depth parameters did not impair the pharyngeal air way space at non growing class II division 1 cases after orthodontic treatment that entailed extraction of four first premolars with retraction of anteriors.

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Oropharyngeal Airway Volume Following Orthodontic Treatment: Premolar Extraction Versus Non-Extraction

Cited by 3 publications

References 72 publications

Effects of bicuspid extractions and incisor retraction on upper airway of Asian adults and late adolescents: A systematic review

Effects of bicuspid extractions and incisor retraction on upper airway of Asian adults and late adolescents: A systematic review

Effects of Four First Premolar Extraction on the Upper Airway Dimension in a NonGrowing Class I Skeletal Patients: A Systematic Review

The Influence of Dental Arch Dimensional Changes on Pharyngeal Airway After Extraction Treatment In Class II Division 1 Malocclusions

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