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Previous issue date: 2018 / O presente estudo teve como objetivo a avaliação tridimensional da
mudança imediata da orofaringe através da tomografia computadorizada de
feixe cônico (TCFC) após cirurgia ortognática bimaxilar com rotação antihorária,
em diferentes avanços cirúrgicos. Os exames tomográficos foram
realizados em 2 tempos distintos: T0 (pré-operatório) e T1 (pós-operatório com
15 dias). O total de 88 exames tomográficos de 44 paciente classe II (11
homens e 33 mulheres) foram selecionados e divididos em três grupos de
acordo com avanço mandibular em milímetros (mm): G1 (< 5mm), G2 (entre 5
e 10 mm) e G3 (> 10mm). O programa Dolphin Imaging foi usado para
mensurar a área sagital mediana (ASM), volume e área axial mínima (AAM) em
cada grupo. Foi utilizado teste t de Student para amostras pareadas. O G1 não
demonstrou diferença estatisticamente significativa, enquanto no G2 apenas a
AAM demonstrou aumentos significativos (p<0,05). Nos avanços superiores a
10 mm (G3) houve aumento significativo em todas as medidas avaliadas,
sendo a AAM a mais sensível. O presente estudo demonstrou que ao menos
10 mm de avanço no ponto B em rotações anti-horárias são necessárias para o
aumento de toda a orofaringe. / The purpose of this study was to quantify, through cone beam computed
tomography (CBCT), the immediate three-dimensional changes in the
oropharynx following bimaxillary orthognathic surgery (OS) with
counterclockwise (CCW) rotation, in different surgical advancements. CBCT
were taken at two distinct time intervals, preoperative (T0) and immediately
postoperative, up to 15 days after surgery (T1). A total of 88 tomographic scans
of 44 class II patients (11 men and 33 women) were selected and divided into
three groups according to the following mandibular advancement in millimeters
(mm): G1 (< 5 mm), G2 (between 5 and 10 mm) and G3 (> 10 mm). Dolphin
Imaging® software was used to measure the medial sagittal area (MSA),
volume, and minimum cross-sectional axial area (CSA) in each group.
Statistical analysis was performed using a paired Student’s t-test for the
samples. No significant difference was observed in patients from G1, while G2
presented statistical improvements in CSA only (p< 0.05). Remarkable changes
in all measures were observed when the advancements were superior to 10
mm (G3), with the CSA showing the most prominent change. The present study
demonstrated that an at least 10 mm B point advancement in CCW was needed
to improve the entire oropharynx.
| Identifer | oai:union.ndltd.org:IBICT/oai:hermes.cpd.ufjf.br:ufjf/8065 |
| Date | January 2018 |
| Creators | Lovisi, Caio Bellini |
| Contributors | Sotto-Maior, Bruno Salles, Assis, Neuza Maria Souza Picorelli, Devito, Karina Lopes |
| Publisher | Universidade Federal de Juiz de Fora (UFJF), Programa de Pós-graduação em Clínica Odontológica, UFJF, Brasil, Faculdade de Odontologia |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFJF, instname:Universidade Federal de Juiz de Fora, instacron:UFJF |
| Rights | info:eu-repo/semantics/openAccess |
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