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Biomedical subjects

A Macchi

Publications and source records attributed to A Macchi.

44 records · Page 3Linked to original sources
PubMedDate not supplied

[Autotransplantation of tooth germs].

During the routine orthodontic examination of a 8-year-4-month old female, it was found that the upper right canine and premolars were missing. The anamnesis revealed that their buds had been surgically removed after a trauma when she was 6 years old. The lower incisors were slightly crowded. Since the age of the patient would not permit a fixed prosthetic restoration in the next few years, it was decided to attempt an autogeneic transplant of the lower first premolars to replace the upper right canine and premolars too.

Bicuspid↗
PubMedDate not supplied

[Lingual appliances: indirect application of lingual brackets. 2].

The bracket must be placed on the tooth in order to reach its tridimensional control, in accordance with all the other teeth. So you must consider these parameters: height, torque, rotation, inclination, tooth slot-vestibular surface distance. Besides brackets direct and indirect application, we describe in this work other alternative ways: the Diamond pliers, the parallelometer Ormco, the jig, and the CreeKmore slot machine.

Dental Bonding↗
PubMedDate not supplied

[Protective effect on enamel of ultra-micronized hydroxyapatite in combination with orthodontic composite cement. In vivo study].

In this work the authors have studied in vivo, the protective action of ultramicronized hydroxylapatite combined with a cement for orthodontic use. An etching gel with 30% acid orthophosphoric for 30'' has been put on a selected group of teeth to be extracted. Then some ultramicronized hydroxylapatite has been applied and some brackets or bands bonded with composite cement. Besides, on another group of teeth selected for the control, some brackets have been bonded with the traditional technique without hydroxylapatite. Some photographic rebuilts of the surface of the teeth to be analysed have been executed at scanning electron microscopy. Further observations have been executed at the aplanatic microscopy stereo to identify the possible macroscopic alterations. The hydroxylapatite proves to have a protective action on the enamel near the orthodontic bands or brackets, fixes with cement and subjected to the action of an acid.

Acid Etching, Dental↗