18 research outputs found
A multilevel analysis of craniofacial growth in subjects with untreated Class III malocclusion
ObjectiveTo analyse the craniofacial growth of a longâterm semiâlongitudinal sample of Caucasian subjects with untreated Class III malocclusion.Setting and sample populationA total of 144 Caucasian subjects (of North American and Italian origin) with untreated Class III malocclusion. Materials and methodsSubjects aged 2Â years and 9Â months up to 21Â years and 7Â months were selected. A multilevel model was used to calculate growth curves for ten variables for both each individual subject and for the whole sample.ResultsThere was a statistically significant increase for total mandibular length (CoâGn. T2âT1Â =Â 8.4Â mm), midfacial length (CoâA. T2âT1Â =Â 3.4 mm) and lower anterior facial height (ANSâMe. T2âT1Â =Â 3.8 mm). The multilevel analysis showed two points of acceleration of growth (about 3â5Â years of age and 11â15Â years of age) for seven out of ten variables. For CoâGn and CoâA variables, males presented points of maximum growth delayed by 1Â year in comparison with females, with a greater duration (1Â year longer) and a greater total growth of about 5Â mm. Active mandibular growth continued for a long time after the pubertal spurt: increases in mandibular length ended at about 17Â years of age in females and at 21Â years and 7Â months in males.ConclusionsUntreated Class III malocclusion showed a specific growth curve, especially for the mandible, whose excesses added up over time. In males, the amounts of mandibular and midfacial growth during the whole observation time were greater and lasted longer than in females.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/154906/1/ocr12356.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/154906/2/ocr12356_am.pd
Re: Response to: Giuntini V, Vangelisti A, Masucci C, Efisio Defraia C, McNamara J, Franchi L. Treatment effects produced by the Twin-block appliance vs the Forsus Fatigue Resistant Device in growing Class II patients. The Angle Orthodontist. 2015;85: 784-789
Effectiveness of comprehensive fixed appliance treatment used with the Forsus fatigue resistant device in Class II patients
Development of a Prediction Model for Short-Term Success of Functional Treatment of Class II Malocclusion
(1) Background: The nature of the changes that contribute to Class II correction with functional appliances is still controversial. A broad variation in treatment responses has been reported. The purpose of this study was to find cephalometric predictors for individual patient responsiveness to twin-block treatment in patients with Class II Division 1 malocclusion; (2) Methods: The study was performed on a sample of 39 pubertal patients (21 females, 18 males) treated with the twin block appliance. Lateral cephalograms were available at the start of the treatment (T1) and at the end of functional therapy (T2). The outcome variable was the T2-T1 change in the sagittal position of the soft tissue pogonion with respect to the vertical line perpendicular to the Frankfort plane and passing through point subnasale. The predictive variables were age, gender at T1, and all the cephalometric parameters measured T1. Forward stepwise linear regression withpvalue to enter 0.05 andpvalue to leave 0.10 was applied; (3) Results: The only significant predictive variable that was selected was the Co-Go-Me angle (p= 0.000); (4) Conclusions: A greater advancement of the soft tissue chin on the profile is expected with smaller pretreatment values of Co-Go-Me angle
3D printed customized facemask for maxillary protraction in the early treatment of a Class III malocclusion: proof-of-concept clinical case
In order to improve fit and comfort, a maxillary protraction facemask customized to the patientâs anatomy was produced by means of 3D face scanning, digital design and additive manufacturing. An 8-year-old patient in need of early treatment for the Class III malocclusion received a rapid palatal expander and a Petit-type facemask, whose components were digitally designed on a 3D scan of the patientâs face. For face scanning, the iPad Pro 2018 tablet (Apple, Cupertino, CA, USA) with the Bellus3D DentalPro application (Bellus3D, Campbell, CA, USA) was used. Facemask components were modelled with 3D Blender software. The rests were 3D printed in BioMed Clear biocompatible resin (Formlabs, Somerville, MA, USA), and the bar in stainless steel. For greater comfort, the internal surface of the rests was lined with a polymer gel pad (Silipos, Niagara Falls, NY, USA). The manufacturing procedure of the customized facemask is patented. The patient wore the facemask at night for a period of 9 months. The patientâs experience was evaluated with a questionnaire at 1 week, 3, 6, and 10 months of treatment. The customized facemask was well accepted by the patient and obtained the expected treatment outcome. Furthermore, 3D face scanning, 3D modelling and 3D printing allow for the manufacturing of customized facemasks with improved fit and comfort, favoring patient compliance and treatment success. © 2022 by the authors. Licensee MDPI, Basel, Switzerland
Threeâdimensional evaluation of the maxillary effects of two orthopaedic protocols for the treatment of Class III malocclusion: A prospective study
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/146332/1/ocr12247.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/146332/2/ocr12247_am.pd
Geoffroy de Lagasnerie, Logique de la création
Les universitaires ont raison dâĂȘtre inquiets. La sociĂ©tĂ© ignore ce quâils sont et ce quâils font. Le journalisme vĂ©hicule les pires poncifs Ă leur sujet. Quant Ă leur institution, elle vient de traverser la pire crise de son histoire et ce nâest pas fini. Plusieurs Ă©lectrochocs rĂ©cents, souvent aux allures burlesques, ont secouĂ© la vieille maison qui se voit poussĂ©e Ă la rĂ©flexivitĂ©Â : une blessure narcissique, suite Ă la publication en 2003 du classement dit de Shanghai qui relĂ©guait les Ă©ta..