McNamara analysis cephalometric parameters in White-Brazilians, Japanese and Japanese-Brazilians with normal occlusion

Abstract

Introduction: McNamara’s Jr. cephalometric analysis is a tool to diagnose dental and skeletal discrepancies and is widely used, guiding diagnosis for surgical procedures to be performed or for the use of functional devices. Few studies have shown that different ethnic groups have different cephalometric patterns. Thus, single characteristics should be respected to support the diagnosis and to help the treatment plan for different ethnic groups and their different patterns of miscegenation. Objective: Obtain normal values for McNamara’s cephalometric analysis for adolescent Japanese-Brazilian descents with normal occlusion, as well as to compare this sample with similar samples of White-Brazilian and Japanese. Methods: Lateral headfilms from 40 White-Brazilian, 33 Japanese and 32 Japanese-Brazilian descents were selected. The three groups were composed by individuals with normal occlusion, well-balanced profiles and were separated by sex. The data were statistically analyzed with ANOVA, t-test, ANCOVA and MANCOVA tests. Results: White-Brazilian males had significantly greater nasolabial angle than Japanese males. Japanese-Brazilian displayed an intermediate value between White-Brazilian and Japanese. Conclusion: White-Brazilian, Japanese and Japanese-Brazilian present different cephalometric characteristics of McNamara analysis. Japanese males have a significantly more acute nasolabial angle than White-Brazilian subjects.

Miniscrew insertion sites of infrazygomatic crest and mandibular buccal shelf in different vertical craniofacial patterns: A cone-beam computed tomography study

“…For example, compared to Caucasian subjects, Brazilian Afro-Caucasian subjects present with greater maxillary protrusion, smaller upper anterior face height and lower posterior face height, larger upper posterior face height, greater maxillary and mandibular dentoalveolar protrusion as well as soft tissue protrusion. 25 Moreover, a recent study 26 compared White Brazilian, Japanese, and Japanese-Brazilian groups on the parameters of McNamara’s cephalometric analysis, concluding that cephalometric parameters differ among these groups and cannot be easily translated.…”

A scoping review of cephalometric normative data in children

“…1,28 Thus, mandibular length is generally longer in males, especially at later time points. 1,2,[27][28][29][30][31][32]39,55,57 Other cross-sectional studies found insignificant sexrelated differences in Co-Gn from the age of 10-14 years. 24,33,38 Only two studies have measured the mandibular height (Co-Go), with conflicting results.…”

<p><strong> Perbedaan hasil analisis sefalometri McNamara sebelum dan sesudah perawatan maloklusi kelas I protrusif bimaksiler </p></strong><em/><p><strong> Differences in the result of MCNamara cephalometric analysis before and after protrusive bimaxillary class I malocclusion treatment</p></strong>

“…1,10 Analisis Mc Namara memberikan gambaran mengenai profil skeletal fasial, panjang rahang dan relasinya. 11,12 Analisis ini dibagi menjadi lima bagian penilaian yaitu relasi maksila terhadap basis kranial, relasi mandibula terhadap basis kranial, relasi mandibula terhadap maksila, relasi insisif rahang atas terhadap titik A, relasi insisif rahang bawah terhadap garis A-Po, dan analisis jalur nafas. 11,13 Keuntungan analisis ini adalah dapat melihat perubahan vertikal dan sagital sehingga hasilnya dapat menjadi satu kesatuan unit yang terintegrasi, selain itu analisis ini dapat melihat pola pertumbuhan seseorang dan sebagian besar menggunakan pengukuran linear sehingga lebih mudah untuk membuat rencana bedah ortognati.…”