Orthodontic treatment change was examined for 106 consecutively referred patients using serial lateral cephalometric radiographs and study cast records. The 2-D and 3-D measurement systems used to assess the changes were compared for five variables common to both sets of records. No statistical differences were found between the study cast and radiographic records for these variables.
The 3-D measurement with the Reflex Metrograph showed marginally better precision in the measurement of the treatment changes examined. However, the main advantage was that it allowed a more thorough and accurate assessment of both individual incisor position and measurement error.
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References
1.
AngleE. H. (1907) Treatment of malocclusion of the teeth, 7th edn, S.S. White Dental Company, Philadelphia.
2.
BennettD. T. and SmalesF. C. (1969) Accuracy of angular and dimensions of dental arches resulting from orthodontic treatment, Angle Orthodontist, 23, 3–18.
3.
BerkowitzS. (1971) Stereophotogrammetric analysis of casts of normal and abnormal palates, American Journal of Orthodontics, 60, 1–18.
4.
BerkowitzS., GonzalesG. and Nghiem-PhuL. (1982) An optimal profilometer a new instrument for the three dimensional measurement of cleft palate casts, Cleft Palate Journal, 19, 129–138.
5.
BoltonW. A. (1958) Disharmony in tooth size and its relation to the analysis and treatment of malocclusion, Angle Orthodontist, 28, 113–130.
6.
BrookA. H., PittsN. B. and RonsonC. E. (1983) Determination of tooth dimensions from study casts, using an image analysis system, Journal of the International Association of Dentistry for Children, 14, 55–60.
7.
ButcherG. W. and StephensC. D. (1981) The reflex optical plotter. A preliminary report, British Dental Journal, 151, 304–305.
8.
CooperW. S. (1960) The assessment and localisation of tooth size discrepancies as a factor in achieving ideal interdigitation by orthodontic standards, M.Sc. Thesis, University of Washington.
9.
GravelyJ. F. and BenziesP. (1973) The clinical significance of tracing error in cephalometry, British Journal of Orthodontics, 1, 95–101.
10.
HoustonW. J. B. (1983) The analysis of errors in orthodontic measurements, American Journal of Orthodontics, 83, 382–390.
11.
HuckahaG. N. (1964) Arch size analysis and tooth size prediction, Dental Clinics in North America, July, 431–440.
12.
HuddartA. G., ClarkJ. and ThackerT. (1971) The application of computers to the study of maxillary arch dimensions, British Dental Journal, 130, 397–404.
13.
JonesM. L. (1987) A quantitative three dimensional assessment of treatment change in a consecutively referred sample of malocclusion from a Welsh town, Ph.D. Thesis, University of Wales.
14.
JonesM. L., NewcombeR. G., BarryG., BellisH. and BottomleyJ. (1988) A reflex plotter investigation into the dimensional stability of alginate impressions following disinfection by varying regimes employing 2·2 per cent glutaraldehyde, British Journal of Orthodontics, 15, 185–192.
15.
JonesM. L. (1990) ‘The Barry Project—a three dimensional assessment of occlusal treatment change in a consecutively referred sample: the incisors’, British Journal of Orthodontics, 17, 1–19.
16.
NanceH. N. (1947) Limitations of orthodontic treatment I, American Journal of Orthodontics, 33, 177–223.
17.
NeffC. (1957) Size relationship between maxillary and mandibular anterior segments of the dental arch, Angle Orthodontist, 27, 138–147.
18.
RichmondS. (1984) The feasibility of categorising orthodontic treatment difficulty—the use of three-dimensional plotting, M.Sc.dissertation, University of Wales.
19.
RichmondS. (1987) Recording the dental cast in three dimensions. American Journal of Orthodontics, 92, 199–206.
20.
RichmondS. and JonesM. L. (1985) A comparison of two- and three-dimensional incisor angles, British Journal of Orthodontics, 12, 90–96.
21.
SavaraB. S. (1965) Application of photogrammetry for quantitative study of tooth and face morphology, American Journal of Physiological Anthropology, 23, 427–434.
22.
ScottP. J. and AzizAbdel (1980) The reflex plotter—a plotter without photographs, 14th Congress of the International Society of Photogrammetry, July, Hamburg.
23.
SinghI. J. and SavaraB. S. (1971) Analysis of mesio-distal crown size. American Journal of Orthodontics, 59, 488–500.
24.
TakadaK. and LoweA. (1982) Application of the reflected object method to dental cast analysis, I.A.D.R. 60th session, New Orleans, U.S.A.
25.
Van der LindenF. P. G. M., BoersmaH., ZeidersT., PeterK. A. and RaabenJ. H. (1972) Three dimensional analysis of dental casts by means of the optocom, Journal of Dental Research, 51, 1100.
26.
Vander LindenF. P. G. M. (1978) Changes in the position of posterior teeth in relation to ruga points, American Journal of Orthodontics, 74, 142–161.
27.
WalterD. C. (1953) Changes in the form and dimensions of dental arches resulting from orthodontic treatment, Angle Orthodontist, 23, 2–18.
28.
WhiteL. W. and Hobbs (1977) Accurate arch discrepancy measurements, American Journal of Orthodontics, 72, 303–308.
