The distalisation of the upper molar is an orthodontic procedure that can be utilised in dental Class II: in patients with covered bite and/or flat profile; in the presence of agenesis of the third upper molars; when patients and/or parents refuse the extractive treatment and the operator considers distalisation to be an ethically-acceptable procedure. The ideal time for the molar’s distalisation is, in our opinion, at the end of the second permutation period when the second upper molar hasn’t yet erupted within the arch; during this phase it is also possible to exploit the “Lee way space”, reducing the need for extractions as well as the treatment time. Among the different methods we prefer the “Distal Jet” since this allows body movement of the element to be distalisated and which can be, at a later stage, utilised as anchorage for completing the retraction of premolars and canines. All appliances distalisating the molars also generate an anchorage loss which manifests itself with the premolars’ mesialisation and an increase of the overjet. The deployment of micro-screws or, better still, of temporary anchorage devices (TAD) in combination with distalisating appliances could be a suitable system for obviating anchorage loss, therefore TAD “MAS” were utilised combined with Distal-Jet. The TADs insertion area is essential and studies on a series of TAC have made it possible to identify the “safe zones” for application of TADs both intra-radicularly as well as on the palate. In conclusion, the utilisation of “Distal Jet” combined with TAD “MAS” which we could call “Distal Screws”, would allow: distalisating of the molars in a corporeal manner, with loss of minimal or nil anchorage and, therefore, reduction of treatment time; this wouldn’t call for dental anchorage, therefore the premolar teeth would be immediately free to distalisate following the distalisation of the molars; furthermore, once the distalisation has been completed, in several cases the appliance can be utilised as anchorage to complete the distalisation of premolars and canines.
Perche, quando e come distalizzare i molari superiori
LOMBARDO, Luca;SICILIANI, Giuseppe
2007
Abstract
The distalisation of the upper molar is an orthodontic procedure that can be utilised in dental Class II: in patients with covered bite and/or flat profile; in the presence of agenesis of the third upper molars; when patients and/or parents refuse the extractive treatment and the operator considers distalisation to be an ethically-acceptable procedure. The ideal time for the molar’s distalisation is, in our opinion, at the end of the second permutation period when the second upper molar hasn’t yet erupted within the arch; during this phase it is also possible to exploit the “Lee way space”, reducing the need for extractions as well as the treatment time. Among the different methods we prefer the “Distal Jet” since this allows body movement of the element to be distalisated and which can be, at a later stage, utilised as anchorage for completing the retraction of premolars and canines. All appliances distalisating the molars also generate an anchorage loss which manifests itself with the premolars’ mesialisation and an increase of the overjet. The deployment of micro-screws or, better still, of temporary anchorage devices (TAD) in combination with distalisating appliances could be a suitable system for obviating anchorage loss, therefore TAD “MAS” were utilised combined with Distal-Jet. The TADs insertion area is essential and studies on a series of TAC have made it possible to identify the “safe zones” for application of TADs both intra-radicularly as well as on the palate. In conclusion, the utilisation of “Distal Jet” combined with TAD “MAS” which we could call “Distal Screws”, would allow: distalisating of the molars in a corporeal manner, with loss of minimal or nil anchorage and, therefore, reduction of treatment time; this wouldn’t call for dental anchorage, therefore the premolar teeth would be immediately free to distalisate following the distalisation of the molars; furthermore, once the distalisation has been completed, in several cases the appliance can be utilised as anchorage to complete the distalisation of premolars and canines.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
