Effects of combined orthodontic-orthognathic treatment for class II and III correction on posterior airway space

Rongo

J of Oral Rehabilitation

et al. 2021

Aim To systematically review the effects of surgical mandibular advancement (SMA) regarding changes of the upper airways in adult patients with skeletal Class II malocclusion. Materials and Methods Five electronic databases were searched up to April 2020. Human studies focusing on the morphology and dimension of the upper airways after SMA were included. ‘Quality assessment for Before‐After (Pre‐Post) Studies’ was used to assess the risk of bias of the individual studies. Standard mean differences (SMD) with 95% confidence intervals (CI) were calculated for random effect model meta‐analysis. The certainty of evidence was assessed using the GRADE tool. Results Twenty cohort studies of only treated patients without control group were eligible for qualitative synthesis, of which 17 were used for quantitative synthesis. Very low certainty of evidence indicated that SMA resulted in significant increase of the volume and of the smallest cross‐sectional area (SMC) of the nasopharynx (volume SMD: 1.43, CI: 0.62, 2.24, P = .001, I2 = 87.8%; SMC SMD: 1.53, CI: 0.59, 2.47, P = .001, I2 = 90.5%) and oropharynx (volume SMD: 1.36, CI: 0.37,2.35, P = .007, I2 = 92.1%; SMC SMD: 1.21, CI: 0.11,2.32, P = .032, I2 = 93.1%). Significant augmentation of the distances between the posterior pharynx wall and the uvala (SMD: 0.73, CI: 0.46,0.98, P < .001, I2 = 72.7%), the posterior border of the tongue (SMD: 0.52, CI: 0.21,0.84, P = .001; I2: 60.5%), the gonion (SMD: 1.24, CI: 0.56,1.91, P < .001; I2 = 88.8%) and the epiglottis (SMD: 0.40, CI: 0.06,0.74, P = .033; I2 = 84.8%) were observed. Conclusions Weak evidence suggests enlargement of the upper airways of adult Class II subjects following SMA, with major increases in the oropharynx.

“…Twenty papers were finally included in the SR 32‐51 . The data extracted from the included papers are reported in Table 2.…”

Section: Resultsmentioning

confidence: 99%

Section: Study Selectionmentioning

confidence: 99%

Section: Nasopharynxmentioning

confidence: 99%

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Effects of surgical mandibular advancement on the upper airways of adult class II patients: A systematic review with meta‐analysis

Rongo

J of Oral Rehabilitation

et al. 2021

Informationen aus Orthodontie & Kieferorthopädie

“…Basierend auf der vorstehend von Fransson et al [7] publizierten Messmethodik, inaugurierten Kinzinger et al [8] eine Messmethodik, die 6 Ebenen umfasste (▶ Abb. 1) und seither in weiteren Untersuchungen verwendet wurde [9,10].…”

Section: Extrathorakaler Luftraum -Definitionenunclassified

Die Bedeutung des extrathorakalen Luftraumes für die Kieferorthopädie

Hourfar

Kinzinger

Lisson

2020

Self Cite

ZusammenfassungDer „Extrathorakale Luftraum“ findet im klinischen Alltag des Kieferorthopäden sowohl bei der Fallplanung als auch bei der Therapie kaum Beachtung. Ziel dieses Beitrages ist es deshalb, Anatomie, Historie, unterschiedliche Definitionen, bildgebende Verfahren sowie Simulationstechniken des extrathorakalen Luftraumes darzustellen. Ohne kritische Aspekte zu vernachlässigen, werden therapeutische Maßnahmen mit möglichen Auswirkungen auf den extrathorakalen Luftraum, ausgewählte Studienergebnisse sowie interdisziplinäre Implikationen aufgezeigt, auch um die Relevanz des Themas für den Kliniker hervorzuheben.

“…Moreover, results from a meta-analysis showed that adjunct orthodontic treatments, such as rapid maxillary expansion, do not affect the airway below the palatal plane [ 7 ]. Based on the previous literate [ 5 , 6 , 7 , 8 ], it is evident that there is a lack of consensus regarding the influence of fixed OT on PAS dimensions following the correction of skeletal class-II and -III malocclusion.…”

Section: Introductionmentioning

confidence: 99%

Influence of Fixed Orthodontic Therapy on Pharyngeal Airway Dimensions after Correction of Class-I, -II and -III Skeletal Profiles in Adolescents

Senani

Shammery

Nafea

et al. 2021

IJERPH

The aim was to compare the influence of fixed orthodontic therapy (OT) on the pharyngeal airway space dimensions after correction of class-I, -II and -III skeletal profiles and among untreated adolescent patients. A control group comprising of untreated patients was also included. Demographics and OT-related information was retrieved from patients’ records. Measurements of airway spaces in the nasopharynx, oropharynx and hypopharynx were performed on lateral cephalograms. p-values under 0.05 were considered statistically significant. The results showed no statistically significant differences in the naso-, oro- and hypo-pharyngeal airway spaces among patients with class-I, -II and -III skeletal profiles and individuals in the control group. There were no statistically significant differences when naso-, oro- and hypo-pharyngeal airway spaces were compared among patients with class-I, -II and -III skeletal profiles. In conclusion, in non-extraction cases without maxillary expansion, fixed OT does not affect the naso-, oro- and hypo-pharyngeal airway spaces in patients with skeletal Class-I, -II and -III skeletal profiles. Further studies involving patients undergoing ME and premolar extraction are needed to elucidate the influence of fixed OT on the naso-, oro- and hypo-pharyngeal airway spaces.