齒模三維輪廓量測

Three-Dimension Profilometry of a Plaster Tooth-Model

蔡佑男(YU-NAN TSAI)

指導教授 ： 章明

中原大學/工學院/機械工程研究所/碩士(2002年)

https://doi.org/10.6840/cycu200200439

摘要

摘 要
目前三維量測於工業界的應用已不勝沒舉，許多3D數位化掃瞄技術已在各個不同領域之中呈現不同的風貌與特色，如多媒體模型建構、文化藝術數位保存等，但應用於醫療部分則有待大力的推行與開發，如能將3D數位化掃描技術應用於醫療，則可減少因人為疏失而導致的失誤、降低醫療過程中所需等待的時間。
本研究中使用光學非接觸式量測，搭配高次多項式三維空間映射函數校正技術，配合五軸運動機台與三維座標轉換機制，提出七種掃描模式來量測外型複雜度極高的齒模，可將掃描之資料應用於個人齒模資料建檔及其醫療矯正上。
本量測系統中，設定一30mm 40mm 60mm的量測空間，使用雷射十字標產生器配合機台的移動，完成此量測空間的校正。量測時則利用機台的移動，完成大小約50mm 50mm 25mm的齒模外型掃描。根據假牙文獻建議，假牙的誤差需在0.025mm~0.05mm內，而本研究中，量測標準物所得到之資料點經CMM量測平台的比對結果，準確度大約在0.04mm，可符合實際使用上的需求。
目前此相關設備只有德國西門子公司開發完成，但由於其強調口腔掃描，故只能針對單顆牙齒做小範圍掃描，無法如本系統掃描整組齒模架構。且國外機器價格昂貴，國內使用率尚未普及，若能藉由國人自行研發而降低所需成本，將可達到普及化及更廣泛的應用範疇。

關鍵字

三維量測學 ； 映射函數

並列摘要

Abstract
The application of the three dimensional measurement has been widely used in the industry. Currently, three-dimensional digital scanning technique has shown different faces and significance in various fields, such as multimedia model construction, digital preservation of cultural art etc. But, the application in the medical field is still waiting to be developed.
In this research, using non-contact optical measurement, along with high-order polynomial three-dimension space mapping function technique, five-axial movement, 3-D coordinates conversion, and seven scanning modes have been developed to measure tooth plaster-models with highly complex shapes. The scanned data can be used in medical treatment, personal medical record etc.
This measurement system with a 30mm 40mm 60mm -measurement space uses crosshair laser diode generator matching platform movement to accomplish measurement space calibration. As suggested denture mold articles, the error margin should be within 0.025mm~0.05mm. In this research, the data from measuring standard objects was measured with CMM measurement platform to have accuracy of 0.04mm, which satisfies the requirement of practical applications.
Currently, this kind of systems is developed only by German Seimens. But, this system emphasizes on oral chamber scanning, therefore, can only be used in single-tooth small range scan, which makes the scanning of the whole tooth-plaster-model mold structure impossible. Also, this system from overseas is expensive, which prevents it to be widely used. I am anxious to see our countrymen develop our own systems to lower the production cost for it to be widely used in all fields and levels.

並列關鍵字

mapping function ； three-dimension profilometry

參考文獻

27.林高輝,”映射函數三維空間影像量測技術研究”,中原大學博士論文,2002.

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