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    Assessment of soft tissue changes after LeFort I advancement
    (SPRINGER, 2021) Akan, Burcin; Gokce, Gokcenur; Unal, Beyza Karadede; Erhamza, Turkan Sezen
    Purpose The aim of this retrospective study was to investigate the soft tissue changes after maxillary advancement in class III patients. Methods Pre- and post-operative lateral cephalometric radiographs of 20 patients treated with maxillary advancement surgery were included in our study. Skeletal, dental and soft tissue measurements were performed by a single researcher using Dolphin Imaging software version 11.95 (Dolphin Imaging, Chatsworth, CA, USA). Pairedttest was used for statistical evaluation andp < 0.05 was considered statistically significant. Results The amount of motion in soft tissues, respectively, are UL-E: 2.05 mm, ST.A: 0.65 mm, ST.B: - 5 mm, ST.Pog: - 5.73 mm, ST.Conv: - 3.95 mm, nasal prominence: - 1.58 mm, nasal height: 2.76 mm and upper lip length: 2.22 mm. The change of distance to horizontal and vertical reference planes are, respectively, Prn-HRL: 3.02 mm Prn-VRL: 1.76 mm Sn-HRL: 2.76 mm Sn-VRL: 2.94 mm ST.A-HRL: 3.74 mm ST.A-VRL: 3.81 mm UL-HL: 3.93 mm UL-VRL: 4.57 mm LL-HRL: 2.29 mm LL-VRL: 5.31 mm. Conclusions It can be concluded that soft tissues related to maxilla moved anteriorly due to maxillary advancement.
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    Öğe
    Does Appliance Design Affect Treatment Outcomes of Class II Division 1 Malocclusion? A Two-Center Retrospective Study
    (Uab Stilus Optimus, 2021) Akan, Burcin; Erhamza, Turkan Sezen
    Objectives: The purpose of this retrospective study was to compare the pre- and post-treatment values of patients treated with monoblock and twin-block appliances with the values of the skeletal Class I individuals. Material and Methods: The initial lateral cephalometric radiographs of the pubertal untreated skeletal class I patients and cephalometric radiographs of 60 (30 monoblock, 30 twin-block) patients before and after the functional treatment were included in the study. Skeletal, dental, and soft tissue measurements were performed by a single researcher using Dolphin Imaging software version 11.95 (Dolphin Imaging, Chatsworth, CA, USA). Paired t-test was used for statistical evaluation and P < 0.05 was considered statistically significant. Results: In both monoblock and twin-block groups, there was a statistically significant increase in the measurements of the lower jaw and the vertical direction values (sella nasion B point (SNB), pogonion nasion perpendicular, Y-axis, sella nasiongonion gnathion, palatal-mandibular angle, anterior facial height, mandibular length P < 0.05); however, in the Twin-block group, the lower jaw was found to be displaced more forward (change for twin-block; SNB = 2.35, Wits appraisal = -4.77). The most measurements of the twin-block treated group were similar to the control group. Conclusions: Both functional appliances have been identified to be useful in achieving treatment targets; however, with twinblock, results closer to ideal values are obtained.