View source for Association between posterior unilateral functional crossbite and asymmetrical spinal flexion: A prospective study

{{Versions 
 | en = Association between posterior unilateral functional crossbite and asymmetrical spinal flexion: A prospective study
 | it = Associazione tra crossbite funzionale unilaterale posteriore e flessione spinale asimmetrica: uno studio prospettico
 | fr = Association entre occlusion croisée fonctionnelle unilatérale postérieure et flexion vertébrale asymétrique : une étude prospective
 | de = Zusammenhang zwischen hinterem einseitigen funktionellen Kreuzbiss und asymmetrischer Wirbelsäulenflexion: Eine prospektive Studie
 | es = Asociación entre mordida cruzada funcional unilateral posterior y flexión espinal asimétrica: un estudio prospectivo
 | pt = <!-- portoghese -->
 | ru = <!-- russo -->
 | pl = <!-- polacco -->
 | fi = <!-- finlandese/suomi -->
 | ca = <!-- catalano -->
 | ja = <!-- giapponese -->
 }}

{{FR
 | Title = 
 | author1 = Maria Grazia Piancino 
 | author2 = Giada Matacena
 | author3 = Umberto Garagiola 
 | author4 = Farhad B. Naini
 | author5 = Alessandro Tortarolo
 | author6 = David Wertheimf
 | author7 = 
 | author8 = 
 | author9 = 
 | author10 =
 | Source = https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10011000/<!-- where this work comes from or where was it was retrieved (URL) -->
 | Original =  <!-- link to the original screenshot or PDF print from the retrieval -->
 | Date = 2023<!-- date of the original work, when the author/s published it (dd/mm/yyyy) -->
 | Journal = Heliyon
 | DOI =  10.1016/j.heliyon.2023.e14342
 | ISBN = 
 | PUBMED = https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10011000/
 | PMID = 36925534
 | PMCID = 10011000 
 | Pdfcopy = https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10011000/pdf/main.pdf<!-- eventual polished PDF document -->
 | License = CC BY
 }}
 Background

Unilateral posterior crossbite (UPC) with functional shift is a malocclusion that may have the potential to affect the masticatory function and the flexibility of the spine due to intrinsic occlusal, structural and functional asymmetries sustained by marked asymmetrical muscular activation.

Research question

To investigate whether the presence of UPC with functional shift is associated with reverse chewing pattern and altered spine flexion.

Methods

Patients with UPC and a control group of patients with normal occlusion were recorded when chewing soft and hard boluses using a Kinesiograph (Myotronics-Noromed Inc., USA) and spine alignment was assessed with an electronic inclinometer Spinal Mouse® system (Idiag AG, Switzerland).

Results

There were 87 children with UPC in the patients' group among whom 38, with median (IQR) age 8.0 (7.3–9.3) years, had measurements before and after treatment. The UPC patients showed a higher percentage of anomalous/reverse chewing patterns on the crossbite side compared with a control group (p < 0.001). Moreover, a clear difference was observed between left and right flexion angles of the spine in the patients’ group (p < 0.001 and p = 0.001, paired t-test) with the crossbite side being more flexible compared to the non-crossbite side. No such differences were seen in the control group, nor post-treatment for right and left crossbite (p = 0.44 and p = 0.15 respectively, paired t-test).

Significance

This study suggests an association between UPC, asymmetrical chewing patterns and asymmetrical flexion of the spine. These results may help improve understanding of any association between dental malocclusions and spine posture and hence aid diagnosis and treatment strategies.

Keywords: Musculoskeletal physiological phenomena, Posture, Spine, Mastication, Chewing, Malocclusion, Crossbite
 
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