Julien Philippe

Pourquoi un visage plaît

Regular faces are beautiful because they are expressive and arouse an interest in the observer due to the variations in their shape, their surface appearance and their movements. The sensitivity of the eye of the beholder is correlated to the expressivity of the face and of the dentition. Better, however, to avoid any indication of aggression that could foreshadow the senescence of the face.

De la contention

The aim of temporary retention is not to eliminate every causes of relapse and to ensure the stability of treatment, but to eliminate one cause of relapse: the periodontal reactions consecutive to the orthodontic displacement of teeth. The other causes of relapse must be eliminated by the treatment itself, and not by retention. To be effective the retention must be immediate, complete and prolonged. The most used temporary retainers are: the Hawley retainer, the vacuum-retainers and the bonded retainers. None of which is perfect. Only the permanent retention can ensure the stability whatever the cause of relapse. The risks of permanent retainers are not yet well known.

À la recherche d’une ligne céphalométrique de référence

The variability of cephalometric reference lines is examined in this article with regard to typology, natural orientation of the head, orientation by the vestibular system, and anatomy. It appears that these lines have orientations that vary with individual subjects, that is, a line is not the same in a specific person as it is in a theoretical model that is based on average values. It follows from this that the deviation observed between a patients measurement and the average could just as well reflect variations in the reference lines as it does of those of the structures being studied. Such a measurement cannot, accordingly, serve as the basis for a morphological diagnosis. To deal with this problem, we propose another cephalometric reference system that presents, for orthognathic diagnosis, many advantages over the traditional system but, itself, remains imperfect.

Optimisation de l’occlusion statique linguale terminale : une analyse

INTRODUCTION The objectives of orthodontic treatment are to achieve a functional, aesthetic and sustainable occlusion. However, its analysis is often limited to the study of its buccal side, easy to check in mouth. Yet, the lingual occlusion is also of paramount importance. MATERIAL AND METHOD After calling to mind the ideal static objectives of treatment, described by some authors and defined by some scientific societies, this article studies the different supports for the analysis of lingual static occlusion and proposes a new protocol for the carving of orthodontic casts. RESULTS The lingual occlusion end-of-treatment objectives lack details, whether by the scientific societies or literature, although we possess simple ways to study them. DISCUSSION The lingual part of occlusion is rarely studied in our daily practice, particularly because its analysis cannot be achieved by a direct intraoral examination. However, it is of major importance in the success and stability of our treatments.

The prehistory of orthodontics

Orthodontics came into being in 1728. Previously, practitioners were at a loss when confronted with crooked teeth. A Latin philosopher had an ingenious flash of orthodontic inspiration. Other authors were content to either extract the malposed teeth or to modify their shape. However, interest in an approach to preventive orthodontics had now begun.

L’interception de la supraclusion

Overbite appears when neither the interposition of soft tissue nor end-to-end occlusion of anterior teeth succeeds in arresting the natural continuous eruption of incisor teeth. In Class II, division 2 malocclusions during movements of propulsion and of the lateral occlusion, end-to-end incisal relationships are blocked by occlusal interference, perhaps of temporary canines or permanent molars, or by inappropriate orthodontic maneuvers. Orthodontists can prevent this from happening by having patients wear a simple bite plate to contain the eruptive force of lower incisors.