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Journal of Dental Research
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An Image Analysis System for the Determination of Tooth Dimensions from Study Casts: Comparison with Manual Measurements of Mesio-distal Diameter

A.H. Brook

Department of Children's Dentistry and Orthodontics

N.B. Pitts

Department of Conservative Dentistry, Faculty of Dentistry, University of Hong Kong, Hong Kong

F. Yau

Department of Children's Dentistry and Orthodontics

P.K. Sandar

Department of Children's Dentistry and Orthodontics

A first comparison of an image analysis method with classical hand measurement was made using the mesio-distal diameter data derived by the simplest image analysis method, the jawview mode. Fifty casts of male Hong Kong Chinese dental students, mean age 20.4 years, were examined by both methods. The two techniques gave comparable overall results, the correlation coefficients generally being greater than 0.9. A combination of the buccal and occlusal image analysis views gave the best correlation with hand measurement with a comparable variability for different tooth types. For certain teeth, particularly posteriors, reproducibility was better using hand measurement. Optimal weighting of the data from these two different image analysis views can give an "estimated hand measurement" value. Further development of the method to deal with differing orientations of teeth is possible.

REFERENCES

  • Brook, A.H.; Pitts, N.B.; and Renson, C.E. (1983): Determination of Tooth Dimensions from Study Casts Using an Image Analysis System, J Int Assoc Dent Child 14:55-60.[Medline] [Order article via Infotrieve]
  • Butcher, G.W. and Stephens, C.D. (1982): Rapid Three Dimensional Measurements in Clinical Dentistry - A New Approach, Proc SPIE 361:36-40.
  • Krutchkoff, R.G. (1967): Classical and Inverse Regression Methods of Calibration, Technometrics 9:425-439.[CrossRef]
  • Moorrees, C.F.A.; Thomsen, S.O.; Jensen, E.; and Yen, P.K.-J. (1957): Mesiodistal Crown Diameters of the Deciduous and Permanent Teeth in Individuals, J Dent Res 36:39-47.[Free Full Text]
  • Pitts, N.B. and Brook, A.H. (1983): Further Software Development for Tooth Dimensions Derived by Image Analysis, J Dent Res 62 (Sp. Iss.): 660, Abst. No. 93.
  • Takada, K.; Lowe, A.A.; and Decou, R. (1983): Operational Performance of the Reflex Metrograph and its Applicability to the Three Dimensional Analysis of Dental Casts, Am J Orthodont 83:195-199.[CrossRef][Medline] [Order article via Infotrieve]
  • Van der Linden, F.P.G.M.; Boersma, H.; Zelders, T.; Pe-Ters, K.A.; and Raaben, J.H. (1972): Three-dimensional Analysis of Dental Casts by Means of the Optocom, J Dent Res 51:1100.[Free Full Text]

Journal of Dental Research, Vol. 65, No. 3, 428-431 (1986)
DOI: 10.1177/00220345860650031101
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This Article
Right arrow Abstract Freely available
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
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Right arrow Similar articles in PubMed
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Right arrowRequest Permissions
Right arrow Request Reprints
Right arrow Add to My Marked Citations
Citing Articles
Right arrow Citing Articles via Google Scholar
Right arrow Citing Articles via Scopus
Google Scholar
Right arrow Articles by Brook, A.H.
Right arrow Articles by Sandar, P.K.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Brook, A.H.
Right arrow Articles by Sandar, P.K.
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What's this?