Antonela Petrovic

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Masticatory muscles mediate the action of functional orthopedic appliances on mandible growth. When young rats were treated for four weeks with a postural hyperpropulsor of the mandible, an appliance designed to increase condylar cartilage growth rate, the proportion of fast non-fatigable fibres in the lateral pterygoid muscle increased significantly.(More)
A significant increase in overall mandibular length can be achieved with a functional appliance. However this only appears possible in children with a high tissue-level growth potential and responsiveness as defined by the mandibular subperiosteal ossification rate and alveolar bone turnover rate.
The modus operandi and the time-dependent variations in the effects of the LSU-activator, an orthopedic appliance currently used in human orthodontic therapy, was experimentally analyzed in growing rats. This appliance causes a forward positioning of the lower jaw and a restriction of mandibular motility. After a 4-week treatment, the following changes were(More)
The skeletal reaction to Class III intermaxillary magnetic mechanics was previously found to affect two target areas, the pterygomaxillary fissure (PMF) and the condylar cartilage. The objectives of this study were to analyze, radiographically and histologically, the response of these tissues to Class III intermaxillary functional orthopedic magnetic(More)
A new functional appliance (FA) to correct Class II dentoskeletal malocclusions is introduced. The functional orthopedic magnetic appliance (FOMA) II uses upper and lower attracting magnetic means (Nd2Fe14B) to constrain the lower jaw in an advanced sagittal posture. In vitro, a special gauge transducer measured the magnetic attractive path and forces. In(More)
Sixty 20-day-old male rats were divided into 4 groups: controls (group 1), partly immobilized mandible with a chincup-type appliance (group 2) and completely immobilized mandible without (group 3) or with (group 4) a chincup-type appliance. After 4 weeks the rats were killed and 3 parameters were measured: number of 3H-thymidine labelled cells in the(More)