Purpose Different techniques have been proposed to change the appearances of anterior teeth and a deeper comprehension of hard-tissue related labial modifications is desirable. The purpose of the study was to evaluate tooth restoration-induced labial displacements in three dimensions.Materials and Methods In a group of 18 healthy subjects, simulations of vestibular translations of maxillary anterior crowns were obtained. One and two millimeters thick individual “one-piece acrylic resin veneers” which covered maxillary incisors and canines were made for each subject. System repeatability was tested for both two different veneers on five subjects. To evaluate veneers-induced facial soft tissue morphology changes, a three-dimensional stereophotogrammetry apparatus was used: the system recorded a set of four two-dimensional images of a given subject’s head that were processed into one three-dimensional reconstruction. Linear dislocation of selected landmarks were quantified.Results Acquisition and manufacturing-related error demonstrated significant differences in repeated acquisitions with 1-mm thick veneers, that were not further used for the actual experiment. The two millimeters thick veneers showed no significant differences into repeated acquisitions. When wearing the two millimeters thick veneers, all paired and two midline landmarks had significant displacements, ranging from 10% (Subnasale landmark) to 100% (Cheilion landmark) of veneer thickness. A significant positive correlation was obtained between the lower lip displacement and overjet values.Conclusions Maxillary incisors and canines vestibular shift affect both upper and lower lips, without involving cutaneous perilabial landmarks.
Three-dimensional evaluation of teeth-induced labial modifications / R. Rosati, M. De Menezes, A.M. Bettoni Rodrigues Da Silva, A. Rossetti, G.C. Lanza Attisano, C. Sforza. ((Intervento presentato al convegno Congress of the European Prosthodontic Association and meeting of the Scandinavian Society for Prosthetic Dentistry tenutosi a Turku nel 2013.
|Titolo:||Three-dimensional evaluation of teeth-induced labial modifications|
ROSATI, RICCARDO (Primo)
DE MENEZES, MARCIO (Secondo)
SFORZA, CHIARELLA (Ultimo)
|Data di pubblicazione:||2013|
|Settore Scientifico Disciplinare:||Settore BIO/16 - Anatomia Umana|
Settore MED/28 - Malattie Odontostomatologiche
|Citazione:||Three-dimensional evaluation of teeth-induced labial modifications / R. Rosati, M. De Menezes, A.M. Bettoni Rodrigues Da Silva, A. Rossetti, G.C. Lanza Attisano, C. Sforza. ((Intervento presentato al convegno Congress of the European Prosthodontic Association and meeting of the Scandinavian Society for Prosthetic Dentistry tenutosi a Turku nel 2013.|
|Appare nelle tipologie:||14 - Intervento a convegno non pubblicato|