TWI759992B - 陶瓷牙冠之三維積層暨成色設備及其方法 - Google Patents

陶瓷牙冠之三維積層暨成色設備及其方法 Download PDF

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TWI759992B
TWI759992B TW109142993A TW109142993A TWI759992B TW I759992 B TWI759992 B TW I759992B TW 109142993 A TW109142993 A TW 109142993A TW 109142993 A TW109142993 A TW 109142993A TW I759992 B TWI759992 B TW I759992B
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coloring
color
slurry
module
ceramic
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TW109142993A
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TW202222274A (zh
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顏豐明
嚴竣榮
劉乃慧
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法藍瓷股份有限公司
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Priority to TW109142993A priority Critical patent/TWI759992B/zh
Priority to US17/135,673 priority patent/US20220175501A1/en
Priority to CN202111480239.XA priority patent/CN114587651A/zh
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    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61C5/00—Filling or capping teeth
    • A61C5/70—Tooth crowns; Making thereof
    • A61C5/77—Methods or devices for making crowns
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
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    • A—HUMAN NECESSITIES
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    • C04B35/63488—Polyethers, e.g. alkylphenol polyglycolether, polyethylene glycol [PEG], polyethylene oxide [PEO]

Abstract

本發明係有關於一種陶瓷牙冠之三維積層暨成色設備及其方法，主要包括漿料鋪層模組、著色噴塗模組、光照固化模組及主控制器；其中，主控制器控制漿料鋪層模組以漿料槽內的漿料平鋪漿料層；主控制器根據複數著色參數檔控制著色噴塗模組以色料槽內的色料對漿料層上色形成色料層；主控制器控制光照固化模組根據複數積層圖檔對漿料層光照成型。據此，本發明可對每一漿料層上色，且亦可隨時對每一色料層改變其成色效果，故牙冠整體的成色效果相當自然、透光度佳，色澤也相當飽滿，且各色料層間不會產生暈染情況，甚至可塗裝任意之精細圖案。

Description

陶瓷牙冠之三維積層暨成色設備及其方法
本發明係關於一種陶瓷牙冠之三維積層暨成色設備及其方法，尤指一種陶瓷材料於三維積層成型過程中又同時上色之設備及其方法。
人類牙冠的顏色因人種、地區及生活習慣而存在差異；而且，大多數人之上、下頜同名牙齒的顏色也不一致。此外，牙齒顏色與年齡也有著密切關係，隨著年齡的增長，自然牙的色澤明亮度逐漸減低，色彩漸變濃。除此之外，人類自然牙並不是單一顏色，頸部、體部及切端的色度並不一致，其中切端明亮度最大，而頸部彩度最高。由此可知，堆瓷上色在傳統陶瓷牙冠的製造過程中，是相當重要且相當繁複的工作，是相當考驗牙技師的經驗和能力的一項工作。
以現有技術而言，目前氧化鋯瓷塊的著色技術主要有內染法和外染法兩種，內染法是直接在粉體中直接均勻添加著色氧化物，抑或事先直接對陶瓷塊進行預染，讓加工成型前的原料陶瓷塊本身即帶有色彩；而外染法則是加工塑形成義齒之後，透過浸泡和塗刷染色液上色後，才乾燥後燒結成型。
舉例而言，我國專利發明專利公告第I562972號「牙模漸層瓷塊之製造方法」所揭露的，通常在CAD/CAM加工原料的陶瓷塊上就已預先進行染色程序，讓原料陶瓷塊型成漸層顏色效果。不過，此一方法也只能製作制式漸層染色效果的陶瓷牙冠，而且不同染色層間的界線仍相當地明顯，其濃淡亦是很規則，與天然牙齒之不規則濃淡相較，瓷塊之漸層效果並不自然。而且，經過車削加工塑形成義齒之後，仍然需要對病患的自然旁牙進行比色和著色，最後才燒結成型。據此，仍然相當考驗牙技師比色和著色的經驗和能力。
由此可知，一種可自動成型陶瓷牙冠並自動上色之陶瓷牙冠的製造設備和方法，實為產業界、及社會大眾所殷殷期盼者。
本發明之主要目的係在提供一種在三維積層成型的過程中同時上色，且整體成色相當自然、透光度佳，可依患者旁牙之自然齒的色澤客製化漸層上色，進而免除或大量減少傳統製程中牙冠成型後之比色和上色作業，又不影響硬度和使用壽命，且相當容易調控著色。
為達成上述目的，本發明一種陶瓷牙冠之三維積層暨成色設備，主要包括一漿料鋪層模組、一著色噴塗模組、一光照固化模組以及一主控制器；漿料鋪層模組包括一漿料槽，其內儲存有一漿料；著色噴塗模組包括至少一色料槽，其內儲存有一色料；主控制器電性連接至漿料鋪層模組、著色噴塗模組及光照固化模組，且主控制器包括一記憶模組，其儲存有複數積層圖檔及複數著色參數檔，而複數積層圖檔係將一待成型牙冠之立體圖像沿一特定方向以一特定厚度切層之後獲得，又複數著色參數檔係對應複數積層圖檔；其中，主控制器控制漿料鋪層模組以漿料槽內的漿料平鋪一漿料層；主控制器根據複數著色參數檔控制著色噴塗模組以至少一色料槽內的色料對漿料層上色形成一色料層；主控制器控制光照固化模組根據複數積層圖檔對漿料層光照成型。
進一步說明，本發明以漿料鋪層模組鋪層一漿料層之後，隨即對該漿料層上色，而上色後才照光固化形成預定形狀。據此，本發明可對每一漿料層上色，且亦可隨時對每一色料層改變其成色效果，故牙冠整體的成色效果相當自然、透光度佳，色澤也相當飽滿，且各色料層間不會產生暈染情況，甚至可塗裝任意之精細圖案。
較佳的是，本發明之主控制器可對複數著色參數檔分群成複數著色群，而複數著色群可對漿料層上色噴塗量不同或上色噴塗顏色不同。換言之，本發明可利用著色參數檔而將所有的色料層劃分成多個著色群，同一著色群內的色料層採同一顏色或相同噴塗量，而不同著色群間的成色表現則設定為不同，藉此可更具體呈現漸層效果或其他更多元的顯示效果。另外，本發明之主控制器可以不同RGB數值來對複數著色參數檔分群成複數著色群，藉此可更輕易搭配一般噴墨控制手段來實現上色效果。
另一方面，複數著色群對該漿料層上色的噴塗量係自該待成型牙冠之一頸部朝向一切端部逐漸遞減；據此，本發明可以透過控制色料的噴塗量從牙冠頸部朝切端部遞減的方式，來呈現自然牙齒的漸層成色效果。
除此之外，本發明所採用的色料可選自由硝酸鐵、氯化鐵、硝酸鐠及氯化鐠所組成之群中之至少一種與一溶劑之混合物，或選自由硝酸鉺、氯化鉺、硝酸釹、氯化釹、硝酸鈰、氯化鈰所組成之群中之至少一種與該溶劑之混合物；而該溶劑可選自由水、甲醇、乙醇、異丙醇、正丙醇、極性非質子液體及乙酸乙酯所組成之群中之至少一種。
為達成上述目的，本發明一種陶瓷牙冠之三維積層暨成色方法，其包括以下步驟：首先，步驟(Sa)，準備一漿料、至少一色料、複數積層圖檔及複數著色參數檔，而複數積層圖檔係將一待成型牙冠之一立體圖像沿一特定方向以一特定厚度切層之後獲得，又複數著色參數檔係對應複數積層圖檔；再者，步驟(Sb)，將漿料均勻鋪設在一基板上以形成一漿料層；接著，步驟(Sc)，著色噴塗模組可根據複數著色參數檔中之一者以至少一色料對漿料層上色形成一色料層；又，步驟(Sd)，光照固化模組可根據複數積層圖檔中之一者對漿料層光照成型；接著，步驟(Se)，重複前述該步驟(Sb)至該步驟(Sd)，而形成一牙冠陶瓷胚體；最後，步驟(Sg)，高溫燒結牙冠陶瓷胚體而形成陶瓷牙冠。
更佳的是，於該步驟(Sc)中，該著色噴塗模組可根據複數著色參數檔中之一者以至少一色料對漿料層之環周端緣之至少部分上色形成色料層。換言之，在本發明所提供的方法中，在著色步驟中，無須對整個漿料層上色，只需要對局部區域上色，例如僅須對當陶瓷牙冠安裝後會曝露之表層上色，而且上色區域亦可噴塗不同顏色，以呈現更多樣、更精細之圖案。
此外，在本發明所提供的方法中，該步驟(Sa)之前更進行一步驟(S0)，其係提供一著色影像檔，而該著色影像檔可由掃描或拍攝該待成型牙冠或一參考牙冠所獲得；且複數著色參數檔可將著色影像檔沿一特定方向以特定厚度切層之後獲得。換句話說，為了呈現原來牙齒的原貌和顏色、以及促進該陶瓷牙冠與其他周邊牙齒協合感，本發明可先掃描或拍攝原齒、旁齒以及同名齒的影像而構成一著色影像檔，並利用該著色影像檔來製作複數著色參數檔。據此，不僅可達到完全自動化，無須人力介入繪製或編輯陶瓷牙冠之成色影像或資料，且最終的成色表現極為自然，又不會與其他自然齒產生突兀感。
[用以實施發明的形態]
本發明陶瓷牙冠之三維積層暨成色設備及其方法在本實施例中被詳細描述之前，要特別注意的是，以下的說明中，類似的元件將以相同的元件符號來表示。再者，本發明之圖式僅作為示意說明，其未必按比例繪製，且所有細節也未必全部呈現於圖式中。
請同時參閱圖1及圖2，圖1係本發明陶瓷牙冠之三維積層暨成色設備第一實施例之系統架構圖，圖2係本發明陶瓷牙冠之三維積層暨成色設備第一實施例之設備立體圖。如圖中所示，本實施例之設備主要包括一漿料鋪層模組2、一著色噴塗模組3、一光照固化模組4以及一主控制器5；其中，漿料鋪層模組2包括一漿料槽20、一供料部21及一平刮部22，該供料部21連通至漿料槽20，而該漿料槽20內儲存有一漿料，其則係由材料粉末、光硬化樹脂、溶劑及添加劑調配而成。
其中，材料粉末可為氧化鋁粉末、氧化鋯粉末、玻璃陶瓷粉末中至少一者，而光硬化樹脂包含水溶性樹脂及水可分散性樹脂中至少一者。在本實施例中，光硬化樹脂主要是由30～55重量%之丙烯酸酯類單體(Acylate Monomers)、30～40重量%之丙烯酸酯類寡聚體(Acylate Oligomers)、1～4重量%之光起始劑(Photoinitiators)、以及0～2重量%之添加劑(Additive)所組成，其中添加劑並非絕對必要，可視實際情況選用添加。其次，溶劑可百分之百為水或為水與醇類之混合溶劑，例如包含水與乙醇(ET)、異丙醇(IPA)、丙二醇(PG)及己二醇(HG)中至少一者，其中水較佳為去離子水。
再者，添加劑則包括分散劑、黏結劑及塑化劑中至少一者。更具體地說，分散劑包含聚羧酸酯類(polycarboxylate)、聚合物銨鹽(如聚丙烯酸銨)及聚合物鈉鹽(如聚丙烯酸鈉)中至少一者。另外，塑化劑包含分子量則為150以上450以下之聚乙二醇(例如PEG#200、PEG#400)及甘油(丙三醇)中至少一者，塑化劑主要用於降低黏結劑玻璃轉化溫度，使黏結劑常溫下有較好的柔韌性。此外，黏結劑包含分子量為1500以上8000以下之聚乙二醇(例如PEG#2000、PEG#4000、PEG#6000)、聚乙烯醇及聚環氧乙烷中至少一者，黏結劑提供乾燥後陶瓷坯體強度，抵抗平刮部22塗佈時的剪切力，以及調整黏度防止顆粒沉降。
另外，供料部21的底面設置有一長形供料槽(圖中未示)，其剖面大致呈現漏斗狀，故藉由供料部21可均勻鋪設長條漿料於基板6上；另外，平刮部22係一刮板構件，其可對供料部21所鋪設長條漿料刮平。當然，如圖中所示，供料部21和平刮部22皆設置於一可進行X方向移動之機架上，故漿料鋪層模組2是一邊沿著X方向移動一邊進行鋪料作業；亦即，一邊透過供料部21供給漿料，同時又一邊透過平刮部22來刮平漿料。
再者，著色噴塗模組3包括一色料槽31及一噴墨頭32，而色料槽31內儲存有一色料，其可單獨由溶劑和第一溶質群組的混合溶液所構成，其中第一溶質群組可為硝酸鐵、氯化鐵、硝酸鐠或氯化鐠，且第一溶質群組的重量百分比可介於5 wt%至20 wt%之間；而溶劑可為水、醇(如甲醇、乙醇、異丙醇、正丙醇)、極性非質子液體(例如酮，如丙酮)、乙酸乙酯以及水與醇和/或酮的混合液，其重量百分比可介於50 wt%至95 wt%之間。
另一方面，在其他的實施例中，色料亦可由可單獨由溶劑和第二溶質群組的混合溶液所構成，其中第二溶質群組可為硝酸鉺、氯化鉺、硝酸釹、氯化釹、硝酸鈰或氯化鈰，且第二溶質群組的重量百分比可介於25 wt%至50 wt%之間；而溶劑同樣可為水、醇(如甲醇、乙醇、異丙醇、正丙醇)、極性非質子液體(例如酮，如丙酮)、乙酸乙酯以及水與醇和/或酮的混合液，其重量百分比可介於50 wt%至95 wt%之間。
除此之外，在另外的實施例中，色料亦可由第一、二溶質群組及溶劑的混合溶液所構成，例如混合硝酸鐵、硝酸鉺及溶劑、混合氯化鐵、氯化鉺及溶劑、混合硝酸鐠、硝酸釹及溶劑、抑或混和氯化鐠、氯化釹及溶劑等等。於此情況下，溶質的重量百分比可參考上述，而溶劑的重量百分比可介於30 wt%至70 wt%之間。再者，本實施例之噴墨頭32係採用壓電式噴墨頭，其優點在於對色料墨滴的控制能力強，所以很容易實現高精度的著色。
另外，本實施例之光照固化模組4為一數位光處理(Digital Light Processing，DLP)的UV光機，其可根據積層圖檔透過投射UV光於漿料上，讓漿料逐層固化。另外，值得一提的是，本實施例之基板6係由吸水率為5%以上之材質或結構所構成，例如具多孔質構造之矽藻土或陶瓷平板，因此當漿料鋪設形成於基板6時，基板6可即時迅速地吸取漿料中的水分，進而大幅降低漿料中之水分揮發時間以增加製作效率。
此外，本實施例之主控制器5係電性連接至漿料鋪層模組2、著色噴塗模組3及光照固化模組4，且主控制器5包括一記憶模組51，其儲存有複數積層圖檔511及複數著色參數檔512。該複數積層圖檔511係將一待成型牙冠之立體圖像沿一特定方向以一特定厚度切層之後獲得，該特定厚度也就是漿料的鋪層厚度，而該複數著色參數檔512係對應該複數積層圖檔511。
進一步說明，每一積層圖檔511係將一待成型牙冠之立體圖像資料，沿一水平方向以一特定厚度逐層橫切而成之剖面圖像；也就是說，先將一欲成型之陶瓷牙冠的立體圖像資料透過影像處理單元根據一後續製程反應層特定厚度(漿料的鋪層厚度)，予以對應逐層橫切而取得複數個積層圖檔511，從而可依序用在後續形塑陶瓷牙冠的逐層投影固化流程步驟中。其中，該立體圖像資料可以透過光學3D掃瞄系統或透過電腦CAD繪圖而得。
另一方面，複數著色參數檔512基本上是對應於該複數個積層圖檔511，也就是每一積層圖檔511對應有一著色參數檔512，而本實施例之著色參數檔512是透過對患者的原齒或旁齒的比色結果而得。請一併參閱圖3，圖3係本發明第一實施例之陶瓷牙冠之著色分群的示意圖。而且，在本實施例中，主控制器5係以不同RGB數值來對複數著色參數檔512分群成六個著色群Gc1～Gc6，且每一著色群Gc1～Gc6對該漿料層Ls上色噴塗量不同，而同一個著色群Gc1～Gc6內之著色參數檔512的內容是一樣的，也就是噴塗量相同。
更進一步說明，一般牙齒都是漸層成色，即從牙頸部到切端部的彩度是由濃至淡，若本實施例之待成型牙冠的預定成色為A3，則六個著色群Gc1～Gc6之各成色設定可分別為A4、A3.5、A3、A2、A1、及白色(即不上色)，而各群的噴塗量百分比和RGB數值如下表所示。如下表所示，色料槽31內的色料為A4的成色墨水，故只要控制噴塗量百分比即可呈現不同的成色表現，例如若著色群Gc1之A4成色的噴塗量百分比為100%時，而著色群Gc4之A2成色的噴塗量只需要著色群Gc1噴塗量的一半(50%)。然而，具體的噴塗量控制方式也只要透過灰階圖形的噴墨控制手段來實現即可，本實施例係採用RGB數值控制，即以RGB數值來呈現不同的灰階程度。
著色群 成色代碼 噴塗量百分比 R G B
Gc6 White 0 % 255 255 255
Gc5 A1 38 % 158 158 158
Gc4 A2 50 % 128 128 128
Gc3 A3 56 % 112 112 112
Gc2 A3.5 67 % 84 84 84
Gc1 A4 100 % 0 0 0
以下說明本實施例之製造流程：首先，主控制器5控制漿料鋪層模組2將漿料槽20內的漿料均勻鋪設在基板6上以形成一漿料層Ls，此時將靜待數秒以讓基板6去吸收漿料層Ls內的部分水分，使漿料層Ls大致乾燥成型。接著，主控制器5控制著色噴塗模組3根據對應的著色參數檔512以色料對漿料層Ls上色形成一色料層Lc；在此步驟中，若切層的特定厚度t較厚時，亦可等待數秒，讓色料逐漸沉澱進入漿料層Ls內，而使漿料層Ls的成色均勻；反之，若切層的特定厚度t較薄，則無需等待步驟。
再者，主控制器5控制光照固化模組4根據對應的積層圖檔511來對該漿料層Lc投射UV光，以使欲成型區域固化定型。以此類推，只要重複上述鋪漿料層Ls之步驟、色料上色之步驟以及照光固化之步驟直到完成牙冠陶瓷胚體即可。最後，清除未固化之漿料後，高溫燒結牙冠陶瓷胚體而形成一陶瓷牙冠，即以1100℃～1700℃的高溫來燒結陶瓷(一般使用玻璃陶瓷時燒成溫度在1100℃～1300℃；使用氧化鋯則在1300℃～1600℃；使用氧化鋁在1300℃～1700℃)，使其形成具有光滑平整表面且已完成上色之陶瓷牙冠。
請參閱圖4，其係本發明第二實施例之著色影像檔的示意圖；第二實施例與第一實施例主要差異在於，第一實施例之著色參數檔512是透過對患者的原齒或旁齒的比色結果而得，也就是參考原齒或旁齒的成色來編輯著色參數檔512；然而，本實施例則是透過掃描或拍攝該待成型牙冠C R或一參考牙冠C f後而得一著色影像檔，並將之沿一特定方向以一特定厚度切層之後獲得複數著色參數檔512。
進言之，以圖4所揭露者為例，倘若欲準備待成型牙冠C R1之著色影像檔，可拍攝或掃描門牙旁齒C f1(亦為同名齒)作為參考牙冠，因二者不論形狀、大小、抑或色澤通常較為接近，以此不論作為成型亦獲上色之參考極為合適。再者，倘若欲準備待成型牙冠C R2之著色影像檔，則可拍攝或掃描旁齒C f3作為參考牙冠，或者以對應側之同名齒C f2作為參考牙冠皆可。換言之，本實施例特別利用拍攝或掃描原齒、旁齒或同名齒來作為參考牙冠，藉此所成形之陶瓷牙冠不論形狀、大小、或色澤都極為自然，與其他自然齒不會產生突兀感，而且無須人工繪製或編輯陶瓷牙冠之成色影像或資料，可達到完全自動化。
請參閱圖5，其係本發明第三實施例之陶瓷牙冠的橫切剖面圖。本實施例與前述實施例主要差異在於，前述第一、二實施例中之上色步驟，是將色料噴塗於整個漿料層Ls，也就是色料層Lc是與漿料層Ls完全重疊。然而，本實施例則僅針對陶瓷牙冠之外表面上色，也是可能從口腔中曝露之表面上色。
進一步說明，如圖5所示，本實施例之色料層Lc僅隨著漿料層Ls約四分之三的外環周形成一個特定寬度w的區域，以此方式不僅可以節省色料，也可減少噴塗上色的時間。此外，須另外說明的是，前述實施例皆為仿自然齒而呈現漸層成色之陶瓷牙冠，惟本發明並不以此為限，亦可噴塗特定圖案。以圖5所示為例，在色料層Lc上包括了兩種顏色之區塊，其中第一顏色區塊Zc1係作為背景色，而第二顏色區塊Zc2則作為圖案色；以此方式積層後，第二顏色區塊Zc2將呈現精細圖案。據此，本發明亦可於陶瓷牙冠上形成更多元、更精細的圖案，而且成形後的圖案難以毀損或消滅，可長久留存於陶瓷牙冠上。
上述實施例僅係為了方便說明而舉例而已，本發明所主張之權利範圍自應以申請專利範圍所述為準，而非僅限於上述實施例。
2:漿料鋪層模組 3:著色噴塗模組 4:光照固化模組 5:主控制器 6:基板 20:漿料槽 31:色料槽 32:噴墨頭 51:記憶模組 511:積層圖檔 512:著色參數檔 C R,C R1,C R2:待成型牙冠 C f1:門牙旁齒 Gc1~Gc6:著色群 Ls:漿料層 Lc:色料層 t:特定厚度
圖1係本發明第一實施例之系統架構圖。 圖2係本發明第一實施例之設備立體圖。 圖3係本發明第一實施例之陶瓷牙冠之著色分群的示意圖。 圖4係本發明第二實施例之著色影像檔的示意圖。 圖5係本發明第三實施例之陶瓷牙冠的橫切剖面圖。
2:漿料鋪層模組
3:著色噴塗模組
4:光照固化模組
5:主控制器
20:漿料槽
31:色料槽
51:記憶模組
511:積層圖檔
512:著色參數檔

Claims (10)

  1. 一種陶瓷牙冠之三維積層暨成色設備，其係包括： 一漿料鋪層模組，其包括一漿料槽，該漿料槽內儲存有一漿料； 一著色噴塗模組，其包括至少一色料槽，該至少一色料槽內儲存有一色料； 一光照固化模組；以及 一主控制器，其電性連接至該漿料鋪層模組、該著色噴塗模組及該光照固化模組，該主控制器包括一記憶模組，其儲存有複數積層圖檔及複數著色參數檔，該複數積層圖檔係將一待成型牙冠之立體圖像沿一特定方向以一特定厚度切層之後獲得，該複數著色參數檔係對應該複數積層圖檔； 其中，該主控制器控制該漿料鋪層模組以該漿料槽內的該漿料平鋪一漿料層；該主控制器根據該複數著色參數檔控制該著色噴塗模組以該至少一色料槽內的該色料對該漿料層上色形成一色料層；該主控制器控制該光照固化模組根據該複數積層圖檔對該漿料層光照成型。
  2. 如請求項1之陶瓷牙冠之三維積層暨成色設備，其中，該主控制器對該複數著色參數檔分群成複數著色群，該複數著色群對該漿料層上色噴塗量不同或上色噴塗顏色不同。
  3. 如請求項2之陶瓷牙冠之三維積層暨成色設備，其中，該主控制器係以不同RGB數值來對該複數著色參數檔分群成該複數著色群。
  4. 如請求項2之陶瓷牙冠之三維積層暨成色設備，其中，該複數著色群對該漿料層上色的噴塗量係自該待成型牙冠之一頸部朝向一切端部逐漸遞減。
  5. 如請求項1之陶瓷牙冠之三維積層暨成色設備，其中，該至少一色料槽內的該色料係選自由硝酸鐵、氯化鐵、硝酸鐠及氯化鐠所組成之群中之至少一種與一溶劑之混合物，或選自由硝酸鉺、氯化鉺、硝酸釹、氯化釹、硝酸鈰、氯化鈰所組成之群中之至少一種與該溶劑之混合物；該溶劑係選自由水、甲醇、乙醇、異丙醇、正丙醇、極性非質子液體及乙酸乙酯所組成之群中之至少一種。
  6. 一種陶瓷牙冠之三維積層暨成色方法，其包括以下步驟： (Sa)準備一漿料、至少一色料、複數積層圖檔及複數著色參數檔，該複數積層圖檔係將一待成型牙冠之一立體圖像沿一特定方向以一特定厚度切層之後獲得，該複數著色參數檔係對應該複數積層圖檔； (Sb)將該漿料均勻鋪設在一基板上以形成一漿料層； (Sc)一著色噴塗模組根據該複數著色參數檔中之一者以該至少一色料對該漿料層上色形成一色料層； (Sd)一光照固化模組根據該複數積層圖檔中之一者對該漿料層光照成型； (Se)重複前述該步驟(Sb)至該步驟(Sd)，而形成一牙冠陶瓷胚體；以及 (Sg)高溫燒結該牙冠陶瓷胚體而形成該陶瓷牙冠。
  7. 如請求項6之陶瓷牙冠之三維積層暨成色方法，其中，於該步驟(Sa)中更包括透過一主控制器對該複數著色參數檔分群成複數著色群，該複數著色群對該漿料層上色之噴塗量或噴塗顏色不同。
  8. 如請求項7之陶瓷牙冠之三維積層暨成色方法，其中，該複數著色群對該漿料層上色之噴塗顏色的RGB值係自該待成型牙冠之一頸部朝向一切端部逐漸遞減。
  9. 如請求項6之陶瓷牙冠之三維積層暨成色方法，其中，於該步驟(Sc)中，該著色噴塗模組根據該複數著色參數檔中之一者以該至少一色料對該漿料層之環周端緣之至少部分上色形成該色料層。
  10. 如請求項6之陶瓷牙冠之三維積層暨成色方法，其中，該步驟(Sa)之前更進行一步驟(S0)，其係提供一著色影像檔，該著色影像檔係掃描或拍攝該待成型牙冠或一參考牙冠所獲得；該複數著色參數檔係將該著色影像檔沿一特定方向以該特定厚度切層之後獲得。
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