Biomedical subjects
Publications and source records attributed to P Parguel.
Classical orthodontic approaches to bicuspid extractions in closed bite cases do not always reach the esthetic goal. To avoid worsening the profile concavity and undesired alterations in the nasolabial angle, incisor retraction must be discussed individually. We report third molar extraction cases with optimized changes in facial profiles.
In order to check the vertical dimension of children treated with the BEGG technique, 138 children aged 11 or 12 have been compared to the untreated children of the RIOLO, MOYERS, MAC NAMARA, HUNTER Atlas. 1. With the mesofacial children the vertical measurements increase very little under the treatment (SWAIN, ACKERMANN). 2. With half of the brachyfacial children--whose vertical measurements at the end of the traitment are lower than those of their group--the vertical measurements increase much above the average brachyfacial group. With the other half of the brachyfacial children--whose vertical measurements at the end of treatment are the highest in their group--the vertical measurements don't increase much. 3. With some of the dolichofacial children--whose vertical measurement at the end of treatment are high compared to the average dolichofacial group--the vertical measurements increase very little With other dolichofacial children--whose vertical measurements at the end of treatment are low compared to the average dolichofacial group--the vertical measurements increase with the treatment.
Eliminating, in a first step, the growth effect on the modifications of the skeletal and alveolo-dental structures thanks to the cephalometric analysis of cases not treated, we study the therapeutic control of skeletal Classes I and II (treated with or without extraction) successively in the BEGG, RICKETTS and EDGEWISE technics. For that, we analyse statistically the cephalometrics variations comparing the differents angles and measurements of the RICKETTS, TWEED and STEINER analyses before and after treatment. Thus, we evaluate the bi-dimensionnals, antero-posterior and vertical modifications that an take place during the treatment respectively in the three technics.
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