Objective: To evaluate the long-term effects of rapid maxillary expansion (RME) and posterior bite block (BB) in prepubertal subjects with dentoskeletal open bite. Materials and Methods: The treatment group (TG) comprised 16 subjects (14 girls, 2 boys) with dentoskeletal open bite with a mean age of 8.1 6 1.1 years treated with RME and BB. Three consecutive lateral cephalograms were available before treatment (T1), at the end of the active treatment with the RME and BB (T2), and at a follow-up observation at least 4 years after the completion of treatment (T3). The TG was compared with a control group (CG) of 16 subjects (14 girls, 2 boys) matched for sex, age, and vertical skeletal pattern. An independent sample t-test was used to compare the T1 to T3, T1 to T2, and T2 to T3 cephalometric changes between the TG and the CG. Results: In the long term, the TG showed a significantly greater increase in overbite (þ1.8 mm), reduced extrusion of maxillary and mandibular molars (3.3 mm), and, consequently, a significant decrease in facial divergence (2.88) when compared with untreated subjects. Conclusions: The RME and BB protocol led to successful and stable recovery of positive overbite in 100% of the patients considered. Correction of open bite was associated with reduced extrusion of maxillary and mandibular molars with a significant improvement in vertical skeletal relationships when compared with the CG.

Lione, R., Cozza, P., Pavoni, C., Franchi, L., Fusaroli, D., Mucedero, M. (2018). Long-term evaluation of rapid maxillary expansion and bite-block therapy in open bite growing subjects:. ANGLE ORTHODONTIST, 88(5), 523-529 [10.2319/102717-728.1].

Long-term evaluation of rapid maxillary expansion and bite-block therapy in open bite growing subjects:

Lione, Roberta;Cozza, Paola;Pavoni, Chiara;
2018-04-23

Abstract

Objective: To evaluate the long-term effects of rapid maxillary expansion (RME) and posterior bite block (BB) in prepubertal subjects with dentoskeletal open bite. Materials and Methods: The treatment group (TG) comprised 16 subjects (14 girls, 2 boys) with dentoskeletal open bite with a mean age of 8.1 6 1.1 years treated with RME and BB. Three consecutive lateral cephalograms were available before treatment (T1), at the end of the active treatment with the RME and BB (T2), and at a follow-up observation at least 4 years after the completion of treatment (T3). The TG was compared with a control group (CG) of 16 subjects (14 girls, 2 boys) matched for sex, age, and vertical skeletal pattern. An independent sample t-test was used to compare the T1 to T3, T1 to T2, and T2 to T3 cephalometric changes between the TG and the CG. Results: In the long term, the TG showed a significantly greater increase in overbite (þ1.8 mm), reduced extrusion of maxillary and mandibular molars (3.3 mm), and, consequently, a significant decrease in facial divergence (2.88) when compared with untreated subjects. Conclusions: The RME and BB protocol led to successful and stable recovery of positive overbite in 100% of the patients considered. Correction of open bite was associated with reduced extrusion of maxillary and mandibular molars with a significant improvement in vertical skeletal relationships when compared with the CG.
23-apr-2018
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore MED/28 - MALATTIE ODONTOSTOMATOLOGICHE
English
Open bite, Long term, Rapid maxillary expansion, Bite block
Lione, R., Cozza, P., Pavoni, C., Franchi, L., Fusaroli, D., Mucedero, M. (2018). Long-term evaluation of rapid maxillary expansion and bite-block therapy in open bite growing subjects:. ANGLE ORTHODONTIST, 88(5), 523-529 [10.2319/102717-728.1].
Lione, R; Cozza, P; Pavoni, C; Franchi, L; Fusaroli, D; Mucedero, M
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/258732
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