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Journal article

Three dimensional shape measurement system for residual ridges.

Morimitsu T, Nokubi T, Ono T, Watanabe K, Kibi M, Okuno Y...(+6 more)

The Journal of Osaka University Dental School, vol. 32 (1992) pp. 97-103

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It is very important for design and construction of complete dentures to evaluate the condition of residual ridges of edentulous patients objectively and precisely. The authors have been developing a shape measurement system for residual ridges. In this study, the outline of the system is described and the accuracy of the system is evaluated. The system consists of a high precision laser displacement meter, a working table and its controller, and a personal computer. The working table, on which a plaster model is placed, can move until the end of the moving range at a speed of 0.7 mm/sec. The height of the plaster model was measured intermittently with a frequency of 7 points/sec. To determine the accuracy of this system, experimental plaster models, which simulated the simplified shape of residual ridge, were measured and analyzed. The measurement error was 2.5%, which seemed to be highly accurate. The accuracy of the measurement decreased with the darkness of the color of the plaster model.

Author-supplied keywords

  • Alveolar Bone Loss
  • Alveolar Process
  • Diagnosis, Computer-Assisted
  • Diagnosis, Oral
  • Humans
  • Jaw, Edentulous
  • Lasers
  • Reproducibility of Results
  • diagnosis
  • instrumentation
  • pathology

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