EFFICACY OF TEMPORARY FIXED RETENTION FOLLOWING ...

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APPENDIX C. ANCOVA TESTS EVALUATING WHETHER THE AMOUNT OF CHANGE DEPENDS ON THE TYPE OF RETENTION, WITH PATIENT’S SEX AND TIME-OUT-OF-TREATMENT AS COVARIATES 173
Table C-1. Results of ANCOVA tests of whether the amount of relapse depends on the kind of retention; dependent variable is Anterior Discrepancy (ADisc), with time-out-of-treatment as a covariate. Source df Sum Squares F Ratio P Value Retention 1 10.45 5.89 0.0163 Sex 1 0.45 0.25 0.6149 Time 1 2.95 1.66 0.1991 Retention-x-Sex 1 4.77 2.69 0.1028 Retention-x-Time 1 6.00 3.39 0.0677 Sex-x-Time 1 3.30 1.86 0.1744 Retention-x-Sex-x-Time 1 0.98 0.55 0.4591 Table C-2. Results of ANCOVA tests of whether the amount of relapse depends on the kind of retention; dependent variable is Midarch Discrepancy (MADisc), with time-out-of-treatment as a covariate. Source df Sum Squares F Ratio P Value Retention 1 0.31 0.88 0.3503 Sex 1 0.01 0.02 0.8860 Time 1 0.23 0.64 0.4234 Retention-x-Sex 1 0.02 0.06 0.8059 Retention-x-Time 1 1.06 3.00 0.0853 Sex-x-Time 1 0.01 0.03 0.8567 Retention-x-Sex-x-Time 1 0.01 0.02 0.8948 Table C-3. Results of ANCOVA tests of whether the amount of relapse depends on the kind of retention; dependent variable is Curve of Spee (COS), with timeout-of-treatment as a covariate. Source df Sum Squares F Ratio P Value Retention 1 1.32 3.04 0.0834 Sex 1 0.00 0.00 0.9958 Time 1 0.45 1.04 0.3106 Retention-x-Sex 1 0.63 1.46 0.2289 Retention-x-Time 1 0.05 0.12 0.7265 Sex-x-Time 1 0.49 1.14 0.2882 Retention-x-Sex-x-Time 1 0.47 1.08 0.3000 174
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EFFICACY OF TEMPORARY FIXED RETENTI
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DEDICATION This thesis is dedicated
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ABSTRACT Instability of the occlusi
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CHAPTER 5. DISCUSSION .............
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LIST OF FIGURES Figure 3-1. All cas
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Figure 4-14. Box plot of the distri
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Joondeph and Riedel (1994, p 908) d
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Strang (1952, p 794) claimed that
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malocclusion must be maintained if
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e aimed at maintaining, in most ins
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three time intervals: during treatm
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mechanical treatment does not neces
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elation, the masticatory system wil
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exerted on the denture from the buc
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In summary, the variance in tongue
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Sinclair and Little (1983, p 114) a
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Study and 43 orthodontically treate
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and Sakols 1982; Vaden et al. 1997;
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years postretention. Årtun et al.
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adjustment, if necessary. This abil
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Duration of Retention The premise i
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The reduction in tooth structure of
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4. The most stable position of the
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CHAPTER 3. MATERIALS AND METHODS Sa
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The present sample consisted of the
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Figure 3-2. Illustration of how mol
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Figure 3-3. Illustration showing di
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Figure 3-5. Illustration showing mi
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Figure 3-6. Illustration showing an
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Figure 3-8. Illustration showing in
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34. LR3 cusp tip point. 35. Right d
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Figure 3-10. Illustration showing o
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Figure 3-11. Illustration of Inciso
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3. Go, Gonion (anatomic): The most
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Figure 3-13. Depiction of the angle
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Figure 3-15. Illustration of the me
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Figure 3-17. Illustration of the me
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Figure 3-19. Illustration of the an
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Figure 3-21. Illustration of the up
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Figure 3-22. Illustration of the to
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Figure 3-24. Illustration of the po
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the “older” Tweed force system,
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The null hypothesis is: There was n
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Figure 4-1. Distribution of the 166
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occlusal issues are tolerated by bo
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40 35 30 FMA (degrees) 25 20 15 10
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Figure 4-4. Plot of the average val
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larger ANB at the recall examinatio
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21 19 Total Chin (mm) 17 15 13 11 9
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Figure 4-8. Box plot of the distrib
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which a Class I relationship was no
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Figure 4-11. Plot of mean Curve of
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Figure 4-13. Box plot of the distri
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Table A-4 addresses the question of
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Figure 4-16. Bar chart of the avera
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only sample changed significantly m
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3 2 1 0 Canonical Variate 2 -1 -2 R
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8 Anterior Discrepancy (ADisc) 6 4
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40 Incisor Aspect Ratio (IAR) 30 20
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1.5 Incisor Segment Depth (ISD) 1 0
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more stable (i.e., the mean change
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Molar Correction (MC) 10 8 6 4 2 0
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Anterior Segment Width (ASW) 1 0 -1
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final vertical positions. This phas
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decreased in both arches during the
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Figure 5-1. Plot of average Incisor
Page 133 and 134: Based on the present results, the u
Page 135 and 136: these variables indicate more anter
Page 137 and 138: and the hassle associated with plac
Page 139 and 140: Figure 5-2. Scatter-plot graph refl
Page 141 and 142: stability?” and “for how long?
Page 143 and 144: About two-thirds (64%) of the corre
Page 145 and 146: Baume LJ, Horowitz HS, Summers CJ,
Page 147 and 148: Case CS. Techniques and principles
Page 149 and 150: Glenn G, Sinclair PM, Alexander RG.
Page 151 and 152: Joondeph DR. Retention and relapse.
Page 153 and 154: Littlewood SJ, Millett DT, Doubleda
Page 155 and 156: Ormiston JP, Huang GJ, Little RM, D
Page 157 and 158: Rosenstein SW, Jacobson BN. Retenti
Page 159 and 160: Steadman SR. A philosophy and pract
Page 161 and 162: Zachrisson BU, Büyükyilmaz T. Bon
Page 163 and 164: Table A-1. Descriptive statistics a
Page 165 and 166: Table A-2. Descriptive statistics a
Page 167 and 168: Table A-3. Descriptive statistics f
Page 173 and 174: APPENDIX B. ANCOVA TESTS OF THE COM
Page 175 and 176: Table B-1. Continued. Sex Retention
Page 183: Table B-5. Continued. Sex Retention
Page 187 and 188: Table C-7. Results of ANCOVA tests
Page 197 and 198: Table D-1. Descriptive statistics,
Page 203 and 204: Table E-1. Two-way ANOVA tests eval
Page 205: VITA Mark Owens was born on January
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