Transversal effect of expanded-fixed lip bumper: digital model study
Objectives: The aim of the current clinical study was to evaluate the transverse dimensions of the lower dental arch with the use of the fixed and expanded lip bumper associated to the lingual extension from the deciduous canine to the permanent first molar. Methods: The sample was comprised of 14 patients in the mixed dentition with a mean age of 8 years 6 months. All patients were submitted to rapid palatal expansion and dentolaveolar expansion of the lower dental arch with a lip bumper. Pre-teatment and post-treatment cast models were obtained and digitized with the 3Shape R700 3D (3Shape A/S, Copenhagen, Denmark) scanner. Transverse distances between the cusp tips of the canines, the mesial buccal cusps of the deciduous molars and of the permanent first molars and between the cervical middle points of the buccal aspects of these teeth were measured. The t tests were performed to determine whether an increase in transverse distances was significant. Results: A statistically significant transverse increase (p<0,05) ranging from 4.11 mm to 4.51 mm was observed in the cusp tips. Conclusion: The fixed and expanded lip bumper presented a significant transverse effect within approximately 6 months of treatment.
Division: IADR/LAR General Session
Meeting:2012 IADR/LAR General Session (Iguaçu Falls, Brazil) Location: Iguaçu Falls, Brazil
Year: 2012 Final Presentation ID:3125 Abstract Category|Abstract Category(s):Craniofacial Biology
Authors
Ayub, Priscila
( Hospital for Rehabilitation of Craniofacial Anomalies - University of São Paulo, Bauru, N/A, Brazil
)
Lara, Tulio
( Universidade Est. Paulista Julio Mesquita, Araçatuba, N/A, Brazil
)
Bertoz, Francisco
( Universidade Est. Paulista Julio Mesquita, Aracatuba, N/A, Brazil
)
Gabrib, Daniela
( Hospital for Rehabilitation of Craniofacial Anomalies - University of São Paulo, Bauru, N/A, Brazil
)
Ayub, Omar
( São Leopoldo Mandic, Brasília, N/A, Brazil
)
SESSION INFORMATION
Oral Session
Orthodontic Treatment Effects and Outcomes
06/23/2012