O objetivo desse estudo foi avaliar cefalometricamente a estabilidade do tratamento sem extração da mordida aberta anterior realizado na dentadura permanente, após um período médio de 5 anos do término do tratamento. O grupo experimental consistiu de 21 pacientes que foram tratados com aparelho fixo, técnica de Edgewise, e que foram radiografados em três períodos: no início do tratamento (T1); imediatamente após o término do tratamento (T2); e após 5 anos, em média, do término do tratamento (T3). Foram utilizados dois grupos controle. O primeiro, em idade compatível ao grupo experimental no início do tratamento, serviu apenas para caracterizá-lo. O segundo grupo controle, de oclusão normal, apresentava um acompanhamento longitudinal, compatível ao período pós-tratamento, que foi utilizado para comparação das alterações entre ambos, nesse intervalo de tempo. As diferenças ocorridas entre as fases intra-grupo experimental foram analisadas pelo teste t pareado e as alterações pós-tratamento foram comparadas com as alterações do segundo grupo controle pelo teste t independente. Os resultados demonstraram uma recidiva estatisticamente significante da mordida aberta ao final do período pós-tratamento. Os principais fatores que contribuíram para a recidiva foram o menor desenvolvimento vertical dos incisivos superiores e inferiores, no período póstratamento. Entretanto, 61,9% dos casos tratados apresentaram resultados da correção da mordida aberta “clinicamente estáveis". Nem a magnitude inicial da mordida aberta anterior, nem a quantidade total de correção da má oclusão, mostraram-se correlacionadas com a recidiva do tratamento. / The purpose of this study was to cephalometrically evaluate the longterm stability of anterior open bite non-extraction treatment in the permanent dentition after a mean period of 5 years. The experimental group consisted of 21 patients who had undergone orthodontic treatment with fixed appliances from whom cephalometric headplates were obtained at the pretreatment (T1), posttreatment (T2) and postretention (T3) stages. Two control groups were employed. The first, with a compatible age to the experimental group before treatment, was used only to characterize it. The second control group, with normal occlusion, was longitudinally followed, in a time period compatible to the posttretention period and was used for comparison of the changes between them, during this period. The differences between the observation stages in the experimental group were analyzed with paired t tests and the postretention changes were compared to the changes of the second control group with independent t tests. Results demonstrated a statistically significant relapse of the open bite at the end of the postretention period. The primary factors that contributed for the relapse were the smaller vertical development of the maxillary and mandibular incisors in the postretention period. However, 61,9% of the sample presented a “clinically stable" open bite correction. Neither the pretreatment anterior open bite amount or the magnitude of correction were associated with the long-term stability of the final treatment results.

New Zealand Maori and Pacific Island ethnic groups are marking up an increasingly larger proportion of New Zealand�s population. Intercanthal distance (ICD) and management of congenital and acquired deformities of the craniofacial complex. The ICD and IPD have been found to differ to establish these measurements for New zealand Maori and Samoan populations. For New Zealand Maori males the mean ICD was 32.1mm with a standard deviation (SD) of 2.6mm, and the mean IPD was 63.3mm, SD 3.8mm. For New Zealand Maori females the mean ICD was 30.7mm, SD2.7mm and the mean IPD was 60.1mm, SD2.8mm. For Samoan males the mean ICD was 33.9mm, SD2.5mm and the mean IPD 64.5mm, SD3.5mm. For Samoan females the mean ICD was 32.9mm, SD2.3mm and their mean IPD was 61.7mm, SD2.8mm. Consistent with other ethnicities New Zealand Maori and Samoan males have wider values for ICD and IPD than females respectively. New Zealand Maori measurements tend to lie within the normal values established for Caucasian populations, whilst Samoans have larger values.

Commonly used craniofacial reference planes such as Frankfort Horizontal (FH) and sella nasion (SN) have shortcomings including their variable inter-individual orientation when related to true horizontal (HOR). Therefore, the aim of this study was to evaluate the potential usefulness of a range of craniofacial reference planes to HOR including those which have not been investigated before: Krogman-Walker line (KW line), neutral horizontal axis, foramen magnum line and posterior maxillary plane. A sample of 57 (38 female, 19 males) consecutive, pre-treatment orthodontic subjects aged 12 to 18 were photographically recorded in a standing mirror guided natural head position (NHP). Cephalograms taken at the same time were traced, oriented to a plumb line (true vertical) transferred from the photograph, and measured for statistical analysis. Thirty nine of these subjects were photographically recorded 2 months later to test the reproducibility of NHP. The results showed that the variability of the 11 selected craniofacial reference planes related to HOR was generally high. The planes illustrating lowest variability to HOR were FH and KW line with standard deviations of 4.6° and 4.7°, respectively. These, however, showed about double the variation in NHP reproducibility (Dahlberg 2.1°). The KW line and palatal plane were also oriented closest to HOR on average. Therefore, KW line and palatal plane are potential substitutes for the commonly used reference planes in the absence of a reliable NHP. However, NHP still represents a more valid craniofacial reference system than the investigated reference planes. / http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1297323 / Thesis (D.Clin.Dent.) - School of Dentistry, (Orthodonitics), 2007

Over the last decade, physicians have noted a rise in the prevalence of plagiocephaly. This sudden increase combined with the variability in presentation of infant head deformities makes the management of these cases often difficult. Currently, assessment for treatment is solely based largely on subjective determination of the severity of the patients skull malformation. Existing cephalometric techniques, such as external caliper measurements are commonly used, however these technique still contain inaccuracies, due to movement of an infant during measurement, soft tissue compression by the calipers, and lack of precise defined landmarks. (10) Given that no type of normalized measurement exists to identify objectively the severity of a patients skull deformity, the grading and selection of treatment modality has been relegated largely to experienced plastic surgeons and neurosurgeons. We report of a novel measurement that utilizes both CT scan and digital images combined with basic geometry to determine, objectively, the severity of an infants skull deformity, enabling all physicians to better decide what therapeutic intervention to employ.

New Zealand Maori and Pacific Island ethnic groups are marking up an increasingly larger proportion of New Zealand�s population. Intercanthal distance (ICD) and management of congenital and acquired deformities of the craniofacial complex. The ICD and IPD have been found to differ to establish these measurements for New zealand Maori and Samoan populations. For New Zealand Maori males the mean ICD was 32.1mm with a standard deviation (SD) of 2.6mm, and the mean IPD was 63.3mm, SD 3.8mm. For New Zealand Maori females the mean ICD was 30.7mm, SD2.7mm and the mean IPD was 60.1mm, SD2.8mm. For Samoan males the mean ICD was 33.9mm, SD2.5mm and the mean IPD 64.5mm, SD3.5mm. For Samoan females the mean ICD was 32.9mm, SD2.3mm and their mean IPD was 61.7mm, SD2.8mm. Consistent with other ethnicities New Zealand Maori and Samoan males have wider values for ICD and IPD than females respectively. New Zealand Maori measurements tend to lie within the normal values established for Caucasian populations, whilst Samoans have larger values.

Thesis (M.D.S.)--University of Adelaide, Dept. of Dentistry, 1985. / Some mounted ill. Includes bibliographical references (v. 1, leaves 206-227).

Thesis (M.D.S.)--University of Adelaide, Dept. of Dentistry, 1999. / Bibliography: leaves 187-211.

Thesis (M.D.S.) -- University of Adelaide, Dept. of Dental Surgery, 1999. / Bibliography: leaves 137-149.

Thesis (M.S.)--University of Michigan, 1973.

Thesis (M.S.)--University of Michigan, 1982.