Naslov
Effects of Twin Block appliance on jaws and facial characteristics in class II malocclusion – a 2D and 3D evaluation

Autori
Špalj, Stjepan ; Katić, Višnja ; Krneta, Bojana ; Primožič, Jasmina ; Ovsenik, Maja

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
European Journal of Orthodontics / David Rice - : Oxford University Press, 2015, E193-e193

Skup
91st Congress of European Orthodontic Society

Mjesto i datum
Venecija, Italija, 13.06.2015. - 18.06.2015

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
twin block appliance ; facial characteristics ; cephalometric analysis ; 3D plaster casts

Sažetak
AIM: To evaluate dentoalveolar, skeletal and soft tissue changes induced by treatment of class II/1 malocclusion with the Twin block (TB) appliance, in pre-pubertal and peak pubertal growth stages. SUBJECTS AND METHOD: Lateral cephalograms and 3D plaster casts’ scans of 18 subjects aged between 10-15 years (12 females) were analysed before treatment (T0) and after one year of treatment (T1) with the TB appliance. The expansion screw was incorporated in maxillary plate and activated one quarter-turn each week for an average period of six months. Palatal volume and palatal surface area, palate height, maxillary and mandibular gingival surface area, canine and molar widths and depths, overbite and overjet were measured on plaster casts. Sagittal and vertical skeletal maxillary and mandibular characteristics, incisors position and soft tissue features were analysed on cephalograms. T-test was used in statistical analysis. RESULTS: Palatal volume, palatal surface area and maxillary gingival surface area increased significantly, while maxillary arch depth was reduced from T0 to T1 (p<0.05). Mandibular gingival surface area and molar depth were reduced (p<0.05) as a consequence of the late mesial shift. Cephalometric analysis demonstrated stimulated mandibular growth and retrusion of both maxillary incisors and upper lip (p<0.05). CONCLUSIONS: Treatment with TB appliance induces significant remodelling of the upper jaw and maxillary dental arch, and influences the soft tissue features, mainly due to retrusion of the upper incisors.

Izvorni jezik
Engleski

Znanstvena područja
Dentalna medicina

Napomena
Projekt 13.06.2.1.53 financiran od Sveučilišta u Rijeci. Istraživanje je provedeno za vrijeme jednomjesečnog Erasmus studijskog putovanja 2014. godine na Sveučilište u Ljubljani u Sloveniji, za prof. Špalj Stjepana.

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