Publications (9)5.21 Total impact
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Article: Assessment of the reliability and repeatability of landmarks using 3-D cephalometric software.
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ABSTRACT: The aim of this study was to analyze the reliability and repeatability of identification landmarks using 3-D cephalometric software. Ten orthognathic patients were selected for this study and underwent the following protocol: 1. radiographic evaluation (CBCT technique); 2. stone casts; 3. photos; and 4. 3-D cephalometric evaluation. Twenty-one hard tissue landmarks and 14 cephalometric measurements were taken three times (T1, T2, and T3) on each patient, with an interval of one week by two experts in orthodontics (A, B). Standard deviation and Pearson's correlation coefficient were calculated to evaluate intra- and inter-observer repeatability. The results showed a strong correlation for both intra- and inter-observer Pearson's correlation coefficient (>0.7). The current preliminary study showed that the reliability and repeatability of the identification landmarks were very high if the 3-D cephalometric landmarks are defined correctly in the three planes of the space. Further evaluation is necessary to better define the 3-D cephalometric system.Cranio: the journal of craniomandibular practice 10/2012; 30(4):255-63. · 0.66 Impact Factor -
Article: Cone-beam computed tomography: accuracy of three-dimensional cephalometry analysis and influence of patient scanning position.
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ABSTRACT: The aim of this research was to analyze the influence of the position of the skull during cone-beam computed tomography (CBCT) scan and if the three-dimensional cephalometric measurements are influenced by skull orientation during CBCT scan.The study consisted of 5 CBCT scanning (KODAK 9500 Cone Beam 3D System unit) in 5 different positions of a dry skull. The data were imported in SIMPLANT OMS Software version 13.0. Fifteen three-dimensional cephalometric measurements were calculated; moreover, the mean, the SD, the maximum/minimum Δ, and the maximum/minimum Δ percentage were calculated. The statistical analysis was performed by an independent-samples t-test to evaluate differences between the 5 scans.No difference was found in all the three-dimensional analysis. Twelve of 15 measurements have a Δ greater than 1.5, and 7 of 15 measurements have a Δ greater than 2. Nine of 15 have a Δ percentage greater than 5%. The preliminary results suggest that the three-dimensional cephalometric analysis is influenced by patient scanning position.The Journal of craniofacial surgery 07/2012; 23(4):1038-43. · 0.81 Impact Factor -
Article: Functional cephalometry analysis and computerized axiography before and after therapy with “Function Generating Bite” in a deep bite patient
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ABSTRACT: BackgroundThe interest of this case report is the evaluation of the correlation between the condylar pathways and incisor guidance recorded by computerized axiography and functional cephalometry analysis before and after therapy with the “Function Generating Bite” (FGB-D) appliance for deep bite correction. MethodsA 12-year-old Italian male patient affected by deep bite was treated with the functional appliance FGB-D to correct the malocclusion. Computerized axiography and functional cephalometry analysis were performed before and after therapy to evaluate the temporomandibular joint function (TMJ). ResultsThe results showed an improvement of morphology and symmetry of the axiographic tracings and in particular a very good coordination between condylar movement and incisal guide. ConclusionsThe FGB-D appliance is a useful appliance to correct deep bite dental malocclusions improving occlusion and TMJ function. KeywordsDeep bite–Computerized axiography–Temporomandibular joint–Temporomandibular disorders–Functional movement–Function generating bitesinternational journal of stomatology & occlusion medicine 04/2012; 4(2):67-71. -
Article: Reverse-sequencing chewing patterns evaluation in anterior versus posterior unilateral crossbite patients.
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ABSTRACT: It is well established that patients with a unilateral posterior crossbite exhibit reverse-sequencing chewing patterns when chewing on the affected side. The aim of the study was to compare the prevalence of reverse-sequencing chewing cycles in patients with anterior versus posterior unilateral crossbite during chewing soft and hard boluses. Eighty-six children (39 boys, 47 girls) were included in the study: 26 (10.4 ± 2.7 years) with unilateral anterior crossbite, 43 (10.2 ± 4.2 years) with unilateral posterior crossbite, and 17 (10.6 ± 2 years) with normal occlusion were selected for the study. Mandibular movements were measured with a kinesiograph (K7, Myotronics Inc. Tukwila). The kinematic signals were analyzed using custom-made software. The results showed a low prevalence of reverse-sequencing chewing cycles in patients with anterior crossbite, without any significant difference between sides and with the control group, with both soft (P = 0.33) and hard (P = 0.29) bolus. The patients with posterior unilateral crossbite showed a significant higher prevalence of reverse-sequencing chewing cycles during chewing on the crossbite side with respect to the non-crossbite side (P < 0.001) and to the control group (P < 0.001). Comparing the patients with anterior versus posterior unilateral crossbite, a significant difference (P < 0.001) in the prevalence of reverse chewing cycles was demonstrated during chewing on the posterior crossbite side only with both soft and hard bolus. In conclusion, patients with anterior versus posterior unilateral crossbite show different functional characteristics depending on which dental region is involved.The European Journal of Orthodontics 09/2011; 34(5):536-41. · 0.89 Impact Factor -
Article: Clinical and instrumental evaluation of the temporomandibular joint before and after surgical correction of asymptomatic skeletal class III patients.
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ABSTRACT: The purpose of this prospective study was to evaluate the temporomandibular joint (TMJ) morphology, the disk position, and the TMJ symptoms before and after surgical-orthodontic correction of skeletal class III malocclusion.Eleven adult patients were recruited to participate in this longitudinal study. Each patient received presurgical and postsurgical orthodontic treatment with fixed appliances. Six patients were corrected exclusively through mandibular setback, whereas 5 received combined mandibular setback and maxillary advancement. All patients were investigated before and 2 years after treatment through (1) clinical examination, (2) magnetic resonance imaging, and (3) Computerized axiography (CA).The incidence of clinical signs and symptoms was reduced 2 years after surgical-orthodontic treatment, the condyle-disk relationship and TMJ appearance at magnetic resonance imaging were unchanged, and CA showed a significant improvement of TMJ border movements.Mandibular setback surgery does not appear to alter the condyle-disk relationship, whereas correction of class III malocclusion seems to improve clinical and CA signs of TMJ function. Further controls and more long-term evaluation of these patients are necessary to assess the maintenance of these improvements in time.The Journal of craniofacial surgery 03/2011; 22(2):527-31. · 0.81 Impact Factor -
Article: Hemispheric prevalence during chewing in normal right-handed and left-handed subjects: a functional magnetic resonance imaging preliminary study.
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ABSTRACT: This study evaluated the activation of different cortical areas during nondeliberate chewing of soft and hard boluses in five right-handed and five left-handed subjects with normal occlusion, to determine different hemispheric prevalences. The study was conducted with a functional Magnetic Resonance Imaging (1.5 T Magnetom Vision - Siemens Medical, Germany) using a head coil. The results showed that the most frequently activated areas were Brodmann's areas four and six in the primary motor and premotor cortex, the insula and Broca's area and, overall, showed greater activity of the cortical mastication area (CMA) in the right hemisphere for right-handed and in the left hemisphere for left-handed subjects.Cranio: the journal of craniomandibular practice 04/2010; 28(2):114-21. · 0.66 Impact Factor -
Article: Slow or rapid palatal expansion for early treatment of unilateral posterior crossbite? Evaluation of the reverse chewing cycles correction.
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ABSTRACT: It is well established that patients with a unilateral posterior crossbite, when chewing on the affected side, show an increased frequency of reverse chewing cycles. It was hypothesized that the correction of reverse cycles may be due to the characteristics of the therapy. The aim was to investigate the prevalence of reverse chewing patterns in children with unilateral posterior crossbite before and after treatment with Function Generating Bite (FGB). Twenty children, (9 boys, 11 girls; age, mean ± SD, 7.5 ± 1.1), 10 with a right and 10 with a left posterior unilateral crossbite were selected. Mandibular movements during chewing soft and hard boluses were measured with a kinesiograph (K7 -I, Myotronics Inc. Tukwila, Washington, USA). The results showed a significant difference when comparing the percentage of reverse chewing patterns, before and after therapy with FGB, during chewing on the crossbite side both with soft and hard bolus (p<0.0001). No significant differences were observed during chewing on the non-crossbite side. The results of this study confirmed that FGB corrects both the dental and functional asymmetries. Knowing that the rapid palatal expansion does not correct the masticatory function, it is of clinical relevance, for the orthodontists, the knowledge and the understanding of the functional outcomes with different therapies. The type of treatment and the biomechanics of the appliance used are of great importance for the correction of the reverse chewing cycles and for rebalancing the functional asymmetry of children with unilateral posterior crossbite.Progress in orthodontics 01/2010; 11(2):138-44. -
Article: Slow or rapid palatal expansion for early treatment of unilateral posterior crossbite? Evaluation of the reverse chewing cycles correction
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ABSTRACT: ObjectivesIt is well established that patients with a unilateral posterior crossbite, when chewing on the affected side, show an increased frequency of reverse chewing cycles. It was hypothesized that the correction of reverse cycles may be due to the characteristics of the therapy. The aim was to investigate the prevalence of reverse chewing patterns in children with unilateral posterior crossbite before and after treatment with Function Generating Bite (FGB).Materials and methodsTwenty children, (9 boys, 11 girls; age, mean ± SD, 7.5 ± 1.1), 10 with a right and 10 with a left posterior unilateral crossbite were selected. Mandibular movements during chewing soft and hard boluses were measured with a kinesiograph (K7 -I, Myotronics Inc. Tukwila, Washington, USA).ResultsThe results showed a significant difference when comparing the percentage of reverse chewing patterns, before and after therapy with FGB, during chewing on the crossbite side both with soft and hard bolus (p < 0.0001). No significant differences were observed during chewing on the non-crossbite side.DiscussionThe results of this study confirmed that FGB corrects both the dental and functional asymmetries. Knowing that the rapid palatal expansion does not correct the masticatory function, it is of clinical relevance, for the orthodontists, the knowledge and the understanding of the functional outcomes with different therapies.ConclusionsThe type of treatment and the biomechanics of the appliance used are of great importance for the correction of the reverse chewing cycles and for rebalancing the functional asymmetry of children with unilateral posterior crossbite.RiassuntoObiettiviSappiamo dalla letteratura che i pazienti con un morso incrociato monolaterale posteriore, quando masticano dal lato affetto da crossbite, sviluppano una maggiore frequenza di cicli masticatori inversi. È stato ipotizzato che la correzione dei cicli inversi può dipendere dal tipo di terapia. L’obiettivo è stato studiare la prevalenza dei cicli masticatori inversi in bambini con morso incrociato posteriore monolaterale, prima e dopo il trattamento con Function Generating Bite (FGB).Materiali e metodiVenti bambini, (9 maschi, 11 femmine, di età, media ± SD, 7,5 ± 1,1), dei quali 10 con morso incrociato monolaterale a destra e 10 con morso incrociato monolaterale a sinistra sono stati selezionati. I movimenti mandibolari durante la masticazione del bolo molle e del bolo duro sono stati registrati con un kinesiografo (K7-I, Myotronics Inc. Tukwila, Washington, USA).RisultatiI risultati hanno mostrato una differenza significativa, confrontando la percentuale di cicli masticatori inversi, prima e dopo la terapia con FGB, durante la masticazione dal lato del morso incrociato sia con bolo molle che con bolo duro (p < 0,0001). Nessuna differenza significativa è stata osservata durante la masticazione dal lato sano prima e dopo terapia.DiscussioneI risultati di questo studio hanno confermato che l’apparecchio FGB corregge sia le asimmetrie dentali che funzionali. Sapendo che l’espansione rapida del palato non corregge la funzione masticatoria, è di rilevanza clinica, per gli ortodontisti, la conoscenza e la comprensione dei risultati funzionali con terapie diverse.ConclusioneIl tipo di trattamento e la biomeccanica dell’apparecchiatura utilizzata sono di grande importanza per la correzione dei cicli masticatori inversi e per il riequilibrio della dissimmetria funzionale nei bambini con morso incrociato monolaterale posteriore.RésuméObjectifLes patients ayant un articulé croisé postérieur unilatéral, au moment de la mastication dans le coté affecté, montrent une fréquence accrue de cycles de mastication inversée. C’est une donne consolidée. On a établi l’hypothèse que la correction des cycles inversés pouvait dépendre des caractéristiques du traitement. Le but a été donc de rechercher la prévalence des modèles de mastication inversée chez des enfants avec articulé croisé (cross-bite) postérieur unilatéral, avant et après le traitement avec le système Function Generating Bite (FGB).Matériels et methods20 enfants (9 garçons, 11 filles ; âge moyen ± ES 7.5 ± 1,1) ; on en a choisi 10 avec un articulé croisé unilatéral à droite et 10 à gauche. Les mouvements mandibulaires pendant la mastication de bols mous et de bols durs ont été mesurés à l’aide d’un kinésiographe (K7-I, Myotronics Inc. Tukwila, Washington, États-Unis).RésultatsLes résultats ont mis en évidence une différence significative lorsqu’on compare le pourcentage de modèles de mastication inversée, avant et après le traitement avec FGB, pendant la mastication aussi bien de bols durs que de bols mous, du côté du crossbite (p≤0,0001). Aucune différence significative n’a été observée pendant la mastication du côté sans cross-bite.DiscussionLes résultats de cette étude ont bien confirmé que le FGB corrige aussi bien les asymétries dentaires que fonctionnelles. En sachant que l’expansion palatine rapide ne corrige pas la fonction de mastication, les orthodontistes doivent être au courant et maîtriser les résultats fonctionnels des différents traitements.ConclusionsLe type de traitement et la biomécanique de l’appareil utilisé revêtent une importance cruciale pour la correction des cycles de mastication inversée et pour rééquilibrer l’asymétrie fonctionnelle chez les enfants présentant une occlusion croisée postérieure unilatérale.ResumenObjetivosEs sabido que los pacientes con una mordida cruzada posterior unilateral cuando mastican en la parte afectada tienen una frecuencia incrementada de ciclos masticatorios invertidos. Se estableció la hipótesis de que la corrección de los ciclos invertidos podía depender de las características del tratamiento. El objeto fue investigar la prevalencia de los patrones masticatorios invertidos en los niños con mordida cruzada posterior unilateral, antes y después del tratamiento con el sistema FGB (Function Generating Bite).Materiales y métodosFueron seleccionados 20 niños (9 chicos, 11 chicas; edad media ± DE 7.5 ± 1,1); 10 sujetos con mordida cruzada derecha y 10 sujetos con mordida cruzada izquierda. Los movimientos mandibulares durante la masticación de bolos duros y de bolos blandos fueron medidos por medio de un kinesiógrafo (K7-I, Myotronics Inc. Tukwila, Washington, EE UU).ResultadosLos resultados evidenciaron una diferencia significativa al comparar el porcentaje de patrones de masticación invertida, antes y después del tratamiento con FGB, en la masticación en el lado afectado, tanto con bolos duros como con bolos blandos (p≤0,0001). No se observó ninguna diferencia significativa en la masticación en el lado sin mordida cruzada.DiscusiónLos resultados de este estudio confirmaron que el sistema FGB corrige tanto las asimetrías dentarias como funcionales. A sabiendas de que la expansión palatina rápida no corrige la función masticatoria, para los ortodoncistas tiene gran relevancia clinica saber y entender los resultados funcionales de los diferentes tratamientos.ConclusionesEl tipo de tratamiento y la biomecánica del aparato utilizado tienen una marcada importancia para corregir los ciclos masticatorios invertidos y para reequilibrar la asimetría funcional en los niños que están afectados por mordida cruzada posterior unilateral.Progress in Orthodontics. -
Article: Sensitivity of magnetic resonance imaging and computed axiography in the diagnosis of temporomandibular joint disorders in a selected patient population.
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ABSTRACT: The aim of this study was to compare sensitivity differences and interpretative agreement for magnetic resonance imaging (MRI) and computed axiography (CA) tracings in a patient population group with temporomandibular disorder (TMD). A convenience sample of 173 patients (53 men, 120 women; mean age: 33.2 ± 2.6 years) diagnosed with TMD was selected for this study. Each patient underwent an evaluation as per the European Academy of Craniomandibular Disorders clinical form as well as MRI and CA. Use of the MRI results as the gold standard for the planned comparison led to the following observations: a CA sensitivity of 68% for joints without morphologic changes (so-called normal temporomandibular joints [TMJs]), sensitivity of 27% for those with disc displacement, and sensitivity of 8% for those with osteoarthritis. The kappa index, or agreement between the two examination methods, was weak for normal TMJs (0.16), acceptable for anterior disc displacement with reduction (0.28), little for anterior disc displacement without reduction (0.10), and very little for morphologic alterations (0.01). The sensitivity and agreement of the two examination methods was generally low. It was even worse when pathologic changes in the TMJ were more severe. MRI and CA are different examinations that could both be considered for severe TMD diagnosis.The International journal of prosthodontics 25(2):120-6. · 1.38 Impact Factor
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2010–2012
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Università degli Studi di Torino
Torino, Piedmont, Italy
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