Dr. Domenico Dalessandri
Domenico Dalessandri qualified in Dentistry from the University of Brescia, where he received specialty training in orthodontics. He obtained his PhD from the University of Torino discussing a thesis entitled "Cone Beam Computed Tomography: accuracy and reliability". He received a research fellowship in "CBCT applications in Orthodontics" by the University of Trieste. Currently he is Adjunct Assistant Professor at the University of Brescia. He has additional clinical research interests in: indirect bonding; self-ligating braces; use of mini implants and miniscrews; lingual orthodontics; Invisalign; cleft lip and palate; impacted teeth; 3D technology and virtual treatment planning; CAD-CAM; corticotomy and piezocision.
Title: INCIDENCE OF BRACKET BOND FAILURE IN PATIENTS TREATED WITH TWO DIFFERENT FULLY CUSTOMIZED LINGUAL APPLIANCES AND BONDING PROTOCOLS: A PILOT STUDY
AIMS: The purpose of this in vivo pilot study was to compare the incidence of bracket adhesion failures in two groups of patients treated with two different fully customized lingual appliances and bonding protocols.
METHODS: 20 patients were randomly assigned to two groups of 10 participants: group A - fully customized lingual appliance (Incognito); group B - fully customized self-ligating lingual appliance (Harmony). Inclusion criteria were complete permanent dentition, grade 2 (slight treatment need) DHC IOTN score, and space needed for resolving inferior anterior crowding comprised between 2 and 4 mm. Exclusion criteria were one or more missing teeth (except wisdom teeth), extractive orthodontic treatment plan, and presence of extensively restored teeth. After lingual teeth surfaces sandblasting with 50 mm aluminium-oxide powder and etching with 37% phosphoric acid, group A appliances were bonded with NX3 Nexus after the application of a thin layer of ExciTE DSC bonding agent, and group B with Maxcem Elite only.
Results and Conclusions: Mean treatment duration was 21.22 months for group A and 22.79 months for group B patients. The overall bond failure rate was 2.14% for group A and 1.79% for group B, with no significant difference between the two appliances. The highest number of bond failures was observed at the molars level. There was no statistically significant difference in bond failures number between treatment with a self-ligating and a conventional ligation fully customized lingual appliance system, bonded with two different dual-cure resin dental cements, with or without bonding agent.
Authors: Domenico Dalessandri, Marco Migliorati, Simona Dianiskova, Elena Lazzaroni, Ingrid Tonni, Corrado Paganelli