Rapid Maxillary Expansion Affects the Spheno-occipital Synchondrosis in Youngsters

Leonardi, Rosalia; Cutrera, Alice; Barbato, Ersilia

doi:10.2319/012709-56.1

Cited by 44 publications

(41 citation statements)

References 32 publications

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“…This was the same patient population used in a previous investigation. 20 The study was approved by the ethical committee of Catania University, Italy.…”

Section: Methodsmentioning

confidence: 99%

Early post-treatment changes of circumaxillary sutures in young patients treated with rapid maxillary expansion

Leonardi¹,

Sicurezza²,

Cutrera³

et al. 2011

The Angle Orthodontist

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Objective: To test the null hypothesis that circumaxillary sutures do not show bony displacement in response to rapid maxillary expansion (RME) therapy. Materials and Methods: Subjects consisted of eight growing patients (two male and six female) with Angle Class I malocclusion, bilateral posterior crossbite, transverse maxillary deficiency, deep palatal vault, and dental crowding at the start of the treatment. A Hyrax palatal expander was used for each patient, and activation protocol required the screw to be turned three times per day (0.25 mm per turn) for an average of 18 days for all subjects. Multislice computed tomography (CT) scans were performed before rapid palatal expansion (time T0) and again at the end of the active expansion phase (time T1) without removing the expander. Measurements were carried out directly on the CT image using the OsiriX Imaging software program. Data were analyzed statistically by using the Wilcoxon signed rank test. Results: All linear measurements showed an increase between T0 and T1 and RME determined a widening of suture; however, sutures far from the maxilla showed a smaller degree of disarticulation. Conclusions: The hypothesis is rejected. Early treatment with RME produced a significant bony displacement by circumaxillary suture opening. The amount of changes of sutures depends on different factors relating to the subjects and varies between different sutures, showing that sutures that articulate directly with the maxilla face a greater influence by the RME compared with those located further away. (Angle Orthod. 2011;81:36-41.)

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“…This was the same patient population used in a previous investigation. 20 The study was approved by the ethical committee of Catania University, Italy.…”

Section: Methodsmentioning

confidence: 99%

Early post-treatment changes of circumaxillary sutures in young patients treated with rapid maxillary expansion

Leonardi¹,

Sicurezza²,

Cutrera³

et al. 2011

The Angle Orthodontist

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“…27,28 Briefly, patients were examined with a multidetector helical CT scanner (Lightspeed Ultra, GE Medical Systems, Giles, UK). The scanning parameters were 80 kV, 10 mA (low dose), 0.625 mm collimation, pitch 1, and gantry tilt 0u.…”

Section: Methodsmentioning

confidence: 99%

Condyle fossa relationship associated with functional posterior crossbite, before and after rapid maxillary expansion

Leonardi

Caltabiano

Cavallini

et al. 2012

The Angle Orthodontist

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Objective: To investigate condylar symmetry and condyle fossa relationships in subjects with functional posterior crossbite comparing findings before and after rapid maxillary expansion (RME) treatment through low-dose computed tomography (CT). Materials and Methods: Twenty-six patients (14 girls and 12 boys, mean age 9.6 6 1.4 years) with functional posterior crossbite (FPXB) diagnosis underwent rapid palatal expansion with a Hyrax appliance. Patients' temporomandibular joints (TMJ) underwent multislice CT scans before rapid palatal expansion (T0) and after (T1). Joint spaces were compared with those of a control sample of 13 subjects (7 girls and 5 boys, mean age 11 6 0.6 years). Results: Anterior space (AS), superior space (SS), and posterior space (PS) joint space measurements at T0 between the FPXB side and contralateral side demonstrated no statistically significant differences. After RME treatment (T1), all three joint spaces increased on both the FPXB side and the non-crossbite side. However, differences were statistically significant only for the SS when comparing the two sides at T1. SS increased more than AS and PS in the non-crossbite condyle (0.28 mm) and FPXB condyle (0.37 mm), and PS increased only on the FPXB side (0.34 mm). Conclusions: There were no statistically significant differences in condyle position within the glenoid fossa between the FPXB and non-crossbite side before treatment. Increases in joint spaces were observed after treatment with RME on both sides. These changes were, however, of small amounts.

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“…Leonardi y cols. 4 realizaron un estudio tomográfico en 8 pacientes en crecimiento. Antes de la disyunción palatina la medida promedio sagital de la SE fue de 1.73mm +/-0.46mm.…”

Section: Revisión De Literaturaunclassified

Procesos pterigoideos y la sincondrosis esfeno-occipital en la disyunción palatina

Sevillano¹,

Rossi²,

Freire³

et al. 2015

Odontol. sanmarquina

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Recibido: 20-05-14 Aceptado: 12-05-15 55 Procesos pterigoideos y la sincondrosis esfeno-occipital en la disyunción palatina Pterygoid processes and synchondrosis spheno-occipital in the Rapid Maxillary Expansión Resumen La disyunción palatina que consiste en la apertura de la sutura palatina media, es usada frecuentemente para corregir la arcada maxilar estrecha transversalmente y ya que el maxilar se relaciona también con la base del cráneo el objetivo de este estudio fue revisar en la literatura los efectos que la disyunción palatina produce sobre los procesos pterigoideos y la sincondrosis esfeno-occipital, analizados clínicamente, con tomografías computarizadas, gammagrafía ósea, radiografías cefalométricas y el método de elementos finitos. La literatura revisada fue hecha sobre las bases de datos: Medline (PubMed), Scopus, Scielo, BSV (Bireme), ISI (Web of Sciencie) y Lilacs. Se puede afirmar que la fuerza proporcionada durante una disyunción palatina no solo actúa al nivel de la sutura palatina media, sino también sobre los procesos pterigoideos y hasta sobre la sincondrosis esfeno-occipital, ocasionando desplazamientos y diferentes concentraciones de tensiones. Palabras clave: Disyunción palatina; base de cráneo; sincondrosis esfeno-occipital. AbstractThe Rapid Maxillary Expansion that involves the opening of the median palatine suture is used frequently to correct narrow arch maxillary and since the maxillary relates also with the skull base, the objective of this paper was to search in the literature the effects that the Rapid Maxillary Expansion produces on the pterygoid process and the spheno-occipital synchondrosis; analyzed clinically, with compute tomography, bone scintigraphy, cephalometric X-ray and the finite element method. The literature review was done on the data bases: Medline (PubMed), Scopus, Scielo, BSV (Bireme), ISI (Web of Sciencie) and Lilacs. It can be said that the forces it proportionate during the Rapid Maxillary Expansion not only to performs on the median palatine suture, but also on the pterygoid processes and even on the spheno-occipital synchondrosis, to making displacements and different concentrations of stress. Keywords; Rapid Maxillary Expansion; Skull base; Spheno-occipital synchondrosis. IntroducciónLa disyunción palatina es usada frecuentemente para corregir la atresia transversal maxilar, la mordida cruzada posterior y el aumento del perímetro del arco dentario. Estando esta fuerza proporcionada por el aparato disyuntor ortodóntico concentrada inicialmente sobre el ancho del paladar, también desplazamientos simultáneos aparecen en las suturas circunmaxilares 1, 2 (Fig. 1). Algunos estudios sobre los efectos de la disyunción palatina sobre la base de cráneo y la sincondrosis esfeno-occipital en niños mostraron una apertura y un significativo aumento en la actividad metabólica de esta zona. Estas referencias sumadas a la evidencia de que la proliferación condrocítica es modulada por la tensión mecánica, sugiere preguntas sobre la influencia de la disyunción palatina sob...

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Rapid Maxillary Expansion Affects the Spheno-occipital Synchondrosis in Youngsters

Cited by 44 publications

References 32 publications

Early post-treatment changes of circumaxillary sutures in young patients treated with rapid maxillary expansion

Early post-treatment changes of circumaxillary sutures in young patients treated with rapid maxillary expansion

Condyle fossa relationship associated with functional posterior crossbite, before and after rapid maxillary expansion

Procesos pterigoideos y la sincondrosis esfeno-occipital en la disyunción palatina

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