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研究生:王薇婷
研究生(外文):Wei-Ting Wang
論文名稱(外文):A Computer-Aided Analysis on Dental Prosthesis Shade Matching
指導教授:吳帆吳帆引用關係
指導教授(外文):Fan-Wu
口試委員:江永言蔡興國吳帆
口試日期:2011-07-28
學位類別:碩士
校院名稱:國立中正大學
系所名稱:醫療資訊管理研究所
學門:商業及管理學門
學類:醫管學類
論文種類:學術論文
論文出版年:2011
畢業學年度:99
語文別:英文
論文頁數:40
外文關鍵詞:prosthesisshade guideclustertooth matchingdental prescription
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近幾年來,牙科美學漸漸變成現代人們到牙科診所就醫時所重視的需求之一。對於大部分需要植牙的牙科病患來說,理想的贗復牙必須和鄰近牙齒的顏色相近,才顯得自然,因此,牙齒比色在病患植牙前成為不可或缺的重要步驟。
雖然目前市面上已經有一些牙齒比色的軟體,但其價格及使用方式都不盡友善,也不普遍。於是本篇論文提出一個以網頁方式呈現的牙齒比色系統,系統的操作流程就是本篇論文所制訂出來的一個比色的標準流程,此流程如下:使用數位相機和環燈拍攝牙齒影像、為了得到具有一致性的影像執行顏色校正、將影像上的牙齒顏色與比色板上的色片進行分群比色。在上述流程完成後,系統將產生一個PDF檔案的牙科指示單,並經由網路將牙科指示單傳輸給技工所,以達到快速溝通的目標。
本篇論文將所開發的系統提供給牙科醫師使用並進行質性訪談,訪談結果顯示,大多數的牙科醫師對於系統操作流程、比色的正確性以及系統使用的便利性都給予滿意的評價。
Recently dental aesthetics become important requirement when people went to dental clinic. Thus, for the most of dental patient if placed prosthesis, an ideal prosthesis is that the color closes to the adjacent teeth, so the tooth matching become a crucial step before implant.
In this paper we proposed a tooth shade matching system by develop a standard procedure, which is use a digital camera and ring light to take a dental picture and color correction for the consistency of dental image, cluster the color spectrum of the tooth for matching with the shade guide tabs. Finally we perform the system can be decision support system in the shade matching, increasing the correctness of shade matching.
Qualitative interviews are performed; the results showed that most dentists satisfied the smooth standard procedure and the precision of clustering the color spectrum of tooth.
Contents
1. Introduction...................................1
1.1 Background.....................................1
1.2 Motivation and Objectives......................1
2. Related work...................................4
2.1. Color of natural teeth........................4
2.2. Color space...................................5
2.3. Tooth color matching..........................7
3. Development of shade matching approach.........10
3.1 Acquirement of an ideal picture................10
3.2 Color correction...............................11
3.3 Clustering of color spectrum of tooth..........15
4. System Description and Experiment discussion...19
4.1 System Description.............................19
4.2 Discussion.....................................25
4.3 System Evaluation..............................28
5. Conclusions....................................30
6. Reference......................................31

List of Figures
Figure 1. Ring light schematic..........................................................10
Figure 2. Color cards attach with the shade guide tab...................................11
Figure 3. (a) A part of Original image. (b) After using 3×3mask to filter the image.....16
Figure 4. (a) Original image. (b) Clustered result with 16 centroids, represented
with false color.(c) Clustered result after mask operation. (d) Re-clustered
result with top 5 colors of tabs. (e) Final image represented with the five
colors of tabs......................................................................17
Figure 5. System display of dental prescription.........................................21
Figure 6. (a) The colors distribution with 16 tabs. (b) The colors distribution
with top-5 tabs.....................................................................23
Figure 7. System display of select the request tabs.....................................24
Figure 8. (a) The colors distribution with 16 tabs after color shifting operation.
(b) The colors distribution with the selected colors as well as the shift colors....25
Figure 9. (a) Full color card attached to the tab stem. (b) Black, white, red and
yellow attached to the tab stem. (c) Black, white and yellow attached to the
tab stem. (d) White, yellow and red attached to the tab stem. (e) Black, white,
and red attached to the tab stem. (f) Black, yellow, and red attached to the
tab stem............................................................................28


List of Tables
Table 1. Average color parameters of Vitapan Classical’s sixteen tabs [19] in CIELAB and RGB color spaces.....12

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