Magister Chirurgiae Dentium - MChD (Orthodontics)

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https://hdl.handle.net/10566/10633

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Browsing by Author "Dept. of Orthodontics"

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    The accuracy of visualized treatment objectives in bimaxillary protrusion patients
    (University of the Western Cape, 2008) Murphy, Desmond.; Murphy, Desmond; Harris, A.M.P.; Dept. of Orthodontics; Faculty of Dentistry
    The aim of this research project was to assess the accuracy of four different types of VTO [Steyn (1979), Jacobson and Sadowsky (1980), Ricketts (1982) and Holdaway (1984)], in predicting the final result of the incisor and soft tissue response to orthodontic treatment in bimaxillary protrusive patients.
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    Assessment of tooth movement in the maxilla during orthodontic treatment using digital recording of orthodontic study model surface contours
    (University of the Western Cape, 2006) Harris, Angela Manbre Poulter; Nortje, C.J.; Wood, R.E.; Dept. of Orthodontics; Faculty of Dentistry
    The aim of this project was to measure changes in dimension of the first three primary rugae and to evaluate tooth movement in the maxilla during orthodontic treatment in patients treated with and without premolar extractions.
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    Changes in arch dimensions after extraction and non-extraction orthodontic treatment
    (University of the Western Cape, 2008) MacKriel, Earl Ari.; Harris, A.M.P.; Dept. of Orthodontics; Faculty of Dentistry
    The aim of this study was to determine whether there are changes in the interdental arch widths and arch lengths of the mandibular and maxillary arches during nonextraction and extraction orthodontic treatment. The records of 78 patients treated by one orthodontist were used for this study. Three treatment groups were selected: a nonextraction group (Group NE), a group treated with extraction of maxillary and mandibular first premolars (Group 44), and a group treated with extraction of maxillary first premolars and mandibular second premolars (Group 45). The arch width measurements were measured in the inter-canine, inter-premolar and inter-molar areas. The arch length was measured as the sum of the left and right distances from mesial anatomic contact points of the first permanent molars to the contact point of the central incisors or to the midpoint between the central incisor contacts, if spaced.Statistical analysis included descriptive statistics of the data, analysis of the correlation matrices, Wilcoxon Signed Rank tests and Kruskal-Wallis tests of the changes which occurred during treatment. The intercanine widths in the mandible and maxilla increased during treatment in all three groups, with the extraction groups showing a greater increase than Group NE (p<0.05). In Group NE the mandibular arch length increased (p>0.05), while the maxillary arch length remained essentially unchanged. Both extraction groups showed decreases in arch length in the dentitions (p<0.05), with greater decreases occurring in the maxilla. The difference in arch length change between the two extraction groups was not significant (p<0.05). The inter-canine arch width increased in all three treatment groups, more so in the two extraction groups. From this it is evident that extraction treatment does not necessarily lead to narrowing of the dental arches in the canine region. The inter-second premolar arch width decreased in both extraction groups. Non-extraction treatment resulted in an increase in the inter-premolar and inter-molar arch widths.
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    Efficacy of enamel sealants in preventing demineralisation
    (University of the Western Cape, 2008) Nkosi, P.M.; Shaikh, A.B.; Amra, I.; Dept. of Orthodontics; Faculty of Dentistry
    To compare the efficacy of two fluoride containing materials, namely, FluorSure and Duraphat, in protecting the enamel around and underneath the orthodontic brackets against decalcification.
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    The soft-tissue profile preferences of a group of lay persons and professionals
    (University of the Western Cape, 2008) Suliman, Shameela Haroon; Shaikh, A.B.; Samsodien, M.G.; Dept. of Orthodontics; Faculty of Dentistry
    Although facial aesthetics has always been a part of orthodontic diagnosis and treatment planning, the criteria for facial evaluation have been somewhat arbitrary. They are often based on parameters from the field of art or from evaluating faces chosen by orthodontists or other professionals. The aims and objectives of the study were to determine the soft-tissue profile preference of a group of lay persons and professionals; to compare the preferences of the male and female assessors (lay persons group) with regard to the preferred profiles for the maleand female patient respectively; to test similarities and differences in the professional's perceptions of the various profiles. This qualitative study was undertaken at the orthodontic clinic at UWC using post-treatment soft tissue profile photographs of patients who had attended the orthodontic clinic.