TWI728280B - 放射微球、其製備方法及放射性填充物組成物 - Google Patents
放射微球、其製備方法及放射性填充物組成物 Download PDFInfo
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Abstract
本發明提供一種放射微球,包括以化學式Ca3Si2O7表示之玻璃及包含在該玻璃中之氧化釔,且該放射微球之球形度為0.71至1,其中,該放射微球經中子活化照射後具放射性。本發明復提供一種放射微球之製備方法以及一種放射性填充組成物。本發明透過將放射微球遞送至目標組織進行中子活化產生輻射以治療腫瘤,微球之放射性隨時間消失,最終可經骨組織溶解吸收。
Description
本發明係關於一種放射微球以及包含該放射微球之填充物,尤指一種用於治療骨腫瘤之放射性填充組成物。
骨骼組織包含硬骨、軟骨、韌帶以及其他結締組織,具有支持、槓桿作用、負責人體運動機能、保護體內軟組織、儲存以及製造血球細胞等功能。因此當人體的骨骼由於內部疾病、外來傷害、先天性異常或老化而受到損傷,除了造成日常生活中的不便,更可能造成其他器官的傷害。
骨骼疾病中,較嚴重者如腫瘤,包含良性及惡性的腫瘤。骨骼肌肉系統中的腫瘤分類中,只有屬良性第1級之腫瘤患者不用開刀,其餘仍以開刀為主要原則,而惡性腫瘤除了開刀手術以外,尚需輔助療法進行配合,包括化學療法及放射線治療。
對於惡性腫瘤採取多重模式治療法,先由影像診斷以核磁共振、電腦斷層及全身骨骼掃描等精密儀器診斷腫瘤範圍,接著由骨科以切片手術取得腫瘤樣本,病理科分析
腫瘤樣本判定腫瘤種類及等級,再由癌化學治療科及放射線治療科執行術前輔助治療,控制腫瘤至可以開刀之程度,並促成腫瘤切除合併肢體保留手術之可能性與成功率。完成術前輔助治療後,由骨科接手進行切除手術,為避免因腫瘤切除不乾淨導致腫瘤組織殘留而有轉移或復發之風險,通常進行腫瘤大範圍之切除,雖然加上肢體重建手術,但只可讓病人保留住有功能的肢體。切除手術完成後,為控制肉眼不可見之微小轉移,常藉由多次術後輔助治療使微量殘餘之轉移得到控制,術後輔助治療亦包含化學治療及放射線治療。
傳統放射線治療都是採取外部放射性治療來破壞或消除腫瘤,但輻射經過人體遮蔽後大幅衰減,導致必須施加極大的輻射計量,然而這些過量的劑量同時也將導致鄰近腫瘤的正常細胞遭受破壞。
另一方面,骨腫瘤切除手術後所造成之骨缺損,在臨床上常填入骨植入物作為提供受力及細胞生長的支架,能有效的輔助骨組織結構和功能上的再生與修復。目前醫界使用的骨填充材料分為:自體骨(Autograft)、同種異體骨(Allograft)、異種骨(Xerograft)及合成人工骨(Synthetic graft materials)等材料。合成人工骨包含生物活性(Bioactive)材料(如氫氧基磷灰石、生醫玻璃及生醫玻璃陶瓷等)及生物可吸收(Bioresorbable)材料(如硫酸鈣、磷酸鈣鹽類、碳酸鈣、膠原蛋白及聚乳酸等),其中生物可吸收材料,除了其原料來源豐富,且沒有生物衍
生產品的排斥及傳染的疑慮外,在填補骨腫瘤缺損時,可被原骨組織吸收利用,癒合後會恢復原來骨組織的強度與功能。
為避免因腫瘤切除不乾淨造成腫瘤必須大範圍切除,而保留更多可用的肢體部位可能性,亦為了減少腫瘤切除手術後續的化療與放射線療法的不便,本發明利用可吸收人工骨填補材料注射填補骨腫瘤切除手術後之骨缺損,加速腫瘤切除後骨組織的再生,同時添加放射微球於該可吸收人工骨填補材料中,利用腫瘤血管增生的特性,將微球遞送至目標殘餘骨腫瘤組織進行輻射消融或治療。隨著微球停留時間的增加,其中的放射性元素將逐漸衰減,最終失去放射性而成為無害的微球殘留於體內,微球搭配可吸收人工骨填補材料最終降解經骨組織溶解吸收後骨礦化形成新生骨。
本發明提供一種放射微球,係包括以化學式Ca3Si2O7表示之玻璃與氧化釔(Y2O3),該放射微球之球形度為0.71至1,且經中子活化照射後具放射性。
本發明亦提供一種放射微球填充物,係包括放射微球及可吸收人工骨填補材料。
本發明復提供一種放射微球之製備方法,係包括:使以化學式Ca3Si2O7表示之玻璃粉末與氧化釔粉末進行均勻球磨混合,並高溫熔融形成玻璃,進行粉末研磨後,再施以火焰熔射形成玻璃微球,其中,該放射微球之球形度為
0.71至1,且經中子活化照射後具放射性。
根據本發明,係提供一種放射微球,經中子活化照射後具有放射性,可以治療腫瘤;本發明同時提供一種放射微球填充物,其係添加放射微球至可吸收人工骨填補材料中,透過將可吸收人工骨填補材料注射填補至經腫瘤切除後之骨缺損部位,而能將微球遞送至目標殘餘骨腫瘤組織進行輻射消融或治療,隨微球停留時間增加,其放射性消失而成為無害的微球殘留於體內,最終微球及可吸收人工骨填補材料降解經骨組織溶解吸收後骨礦化形成新生骨,使得腫瘤切除手術為避免切除不乾淨而執行過大範圍切除的問題以及切除手術後續的化療與放射線療法的不便獲得明顯改善。
第1圖為放射微球之掃描式電子顯微鏡(SEM)照片。
第2圖為放射微球之掃描式電子顯微鏡(SEM)照片。
以下的具體實施例用以說明本發明之揭露內容,在閱讀本說明書之揭露內容以後,本技術領域中具有通常知識者能輕易地理解其優點及功效。
須知,本說明書所附圖式所繪示之結構、比例、尺寸等,僅為配合說明書所揭示之內容,以便本技術領域中具有通常知識者得以理解及閱讀,而非意圖將本發明限制於特定條件之中,故不具有技術上之實質意義。任何結構之修改、比例關係之改變,或尺寸之的調整,在不影響本說
明書所能產生之功效及所能達成之目的下,均應包含在本說明書所揭露之範圍內。在無實質變更技術內容的情況下,其相對關係之改變或調整,亦當被視為本發明可實施之範疇內。
本發明提供之放射微球係包括以化學式Ca3Si2O7表示之玻璃及包含在該玻璃中之氧化釔,且該放射微球之球形度為0.71至1。
該Ca3Si2O7主要係由CaO混合SiO2高溫熔融後形成,CaO與SiO2之莫爾比為4:6,溫度至少為1400度。
CaSiO3(矽灰石;wollastonite)是典型的鈣矽基生物材料,在SBF(simulated body fluid)中能形成磷酸鈣層和富矽層,產生類羥基磷灰石(HA;hydroxyapatite),具有骨傳導和骨誘導的生物活性,並擁有比HA更加良好的生物活性及可降解性。CaSiO3的型態包括α-wollastonite(Ca2SiO4)、α’-wollastonite(Ca2SiO4)、β-wollastonite(pseudo wollastonite;Ca3Si3O9)、hatrurite(Ca3SiO5)及rankinite(Ca3Si2O7),其中,Ca3Si2O7呈現玻璃相。
其中,As為等效球體表面積(等效球體即體積與待測物相同之球體),Ap為待測物之表面積,而Vp為待測物之
體積。
於一具體實施例中,該放射微球復包括造影核種氧化物,該造影核種經中子活化前係選自下列群組之至少一者:磷、鈣、鈉、錸、鈧、鑭、鈰、鐠、釹、鉕、釤、銪、釓、鋱、鏑、鈥、鉺、銩、鐿、鎦、錒-225、銻-127、砷-74、鋇-140、鉍-210、鉲-246、鈣-46、鈣-47、碳-11、碳-14、銫-131、銫-137、鉻-51、鈷-57、鈷-58、鈷-60、鏑-165、鉺-169、氟-18、鎵-67、鎵-68、金-198、鈥-166、氫-3、銦-111、銦-113m、碘-123、碘-125、碘-131、銥-192、鐵-59、鐵-82、氪-81m、鑭-140、鎦-177、鉬-99、氮-13、氧-15、鈀-103、磷-32、氡-222、鐳-224、錸-186、錸-188、銠-82、釤-153、硒-75、鈉-22、鈉-24、鍶-89、鎝-99m、鉈-201、氙-127、氙-133及釔-90。其中,上述該造影核種經中子活化後衰變為括號內所式之元素,磷(32P->32S)、鈣(47Ca->47Sc;49Ca->49Sc)、鈉(22Na->22Ne)、錸(188Re->188Os)、鈧(44Sc->44Ca;48Sc->48Ti;46Sc->46Ti;47Sc->47Ti)、鑭(140La->140Ce;142La->142Ce)、鈰、鐠、釹、鉕、釤、銪、釓、鋱、鏑、鈥、鉺、銩、鐿、鎦、錒-225(225Ac->221Fr,211Bi,14C)、銻-127(127Sb->127Te)、砷-74(74As->74Ge)、鋇-140(140Ba->140La)、鉍-210(210Bi->210Po)、鉲-246(246Cf->246Cm)、鈣-46(46Ca->46Sc)、鈣-47(47Ca->47Sc)、碳-11(11C->11B)、碳-14(14C->14N)、銫-131(131Cs->131Xe;131Cs->131Ba)、銫-137(137Cs->137Ba)、鉻-51(51Cr->51V)、鈷-57
(57Co->57Fe)、鈷-58(58Co->58Fe)、鈷-60(60Co->60Ni)、鏑-165(165Dy->165Ho)、鉺-169(169Er->169Tm)、氟-18(18F->18O)、鎵-67(67Ga->67Zn)、鎵-68(68Ga->68Zn)、金-198(198Au->198Hg)、鈥-166(166Ho->166Er)、氫-3(3H->3He)、銦-111(111In->111Cd)、銦-113m(113mIn->113Sn)、碘-123(123I->123Te)、碘-125(125I->125Te)、碘-131(131I->131Xe)、銥-192(192Ir->192Os,192Pt)、鐵-59(59Fe->59Co)、氪-81m(81mKr->81Br)、鑭-140(140La->140Ce)、鎦-177(177Lu->177Hf)、鉬-99(99Mo->99Tc,99Ru)、氮-13(13N->13C)、氧-15(15O->15N)、鈀-103(103Pd->103Rh)、磷-32(32P->32S)、氡-222(222Rn->218Po)、鐳-224(224Ra->220Rn,210Pb,14C)、錸-186(186Re->186Os,186W)、錸-188(188Re->188Os)、釤-153(153Sm->153Eu)、硒-75(75Se->75As)、鈉-22(22Na->22Ne)、鈉-24(24Na->24Mg)、鍶-89(89Sr->89Y)、鎝-99m(99Tc->99Ru)、鉈-201(201Tl->201Hg)、氙-127(127Xe->127Cs)、氙-133(133Xe->133Cs)及釔-90(90Y->90Zr)。
於一具體實施例中,該造影核種氧化物於放射微球中佔0至10重量%,更優選為3至8重量%。
本發明所使用之造影核種氧化物,經中子活化照射後放出γ-射線,在體外可經由特種的攝影設備,如γ攝影機或正子斷層掃瞄儀來偵測其在體內分佈及代謝的狀況。這些攝影設備與電腦的整合運用可顯示影像,並可經計算及
分析得到更多的資訊。由於絕大多數的疾病在發病初期皆先有生理、生化和新陳代謝的變化,而後再產生結構性的變化,目前使用較多的X光檢查、電腦斷層等,皆是用來偵測身體上結構性的變化,而核子醫學造影因為能表現器官組織在生理上的變化,而能在疾病發作,且在其他檢查方法發現病徵之前就能偵測出異常。這種早期診斷的能力常使得疾病在病程快速發展前就得到治療。
於一具體實施例中,該放射微球之粒徑優選為20至100μm。
於一具體實施例中,該放射微球中玻璃與氧化釔之莫爾比優選為80:20至70:30,在此範圍內Ca3Si2O7能維持良好的玻璃相,且具有足夠之放射劑量。
於一具體實施例中,該放射微球復包括形成於該玻璃表面上之塗佈層,該塗佈層係包含有機材料、無機材料其中之一或其組合。
於一具體實施例中,該有機材料包含酸根、羥基、胺基或羧基。
於一具體實施例中,該有機材料包含可生物降解材料。
於一具體實施例中,該無機材料包含磷酸鹽類化合物、硫酸鹽類化合物、氯鹽類化合物、硝酸鹽類化合物或硼酸鹽類化合物。
於一具體實施例中,該塗佈層係該塗佈層係聚乙烯吡咯烷酮(polyvinylpyrrolidone)、聚乙烯醇
(polyvinylalcohol)、羧甲基纖維素(carboxymethyl cellulose)、聚乙二醇(PEG6000)、甲基纖維素(methylcellulose)、羥丙基甲基纖維素(hydroxypropyl methyl cellulose)、羥丙基纖維素(hydroxypropyl cellulose)、阿拉伯膠(gum arabic)、聚L-乳酸/聚乳酸甘醇酸(PLLA/PLGA)或Ca3(PO4)2。
本發明之放射微球隨時間喪失放射性後殘留於體內時,不會影響可吸收人工骨填補材料的降解,亦能與可吸收人工骨填補材料成為新骨成形前的穩定架構,提供促進骨頭生長的環境,適合作為人工骨填補材料之添加物使用。
本發明亦提供一種放射性填充組成物,係包括該放射微球以及可吸收人工骨填補材料,該可吸收人工骨填補材料係選自由硫酸鈣鹽、磷酸鈣鹽、碳酸鈣鹽及聚乳酸所組成群組之至少一者。
該硫酸鈣鹽係選自無水硫酸鈣(calcium sulfate anhydrate)、半水硫酸鈣(calcium sulfate hemihydrate)、二水硫酸鈣(calcium sulfate dihydrate)的一種或多種,或無水硫酸鈣/半水硫酸鈣、無水硫酸鈣/二水硫酸鈣、半水硫酸鈣/二水硫酸鈣、或無水硫酸鈣/半水硫酸鈣/二水硫酸鈣的混合物、組成物或加成物。
該磷酸鈣鹽係選自單鈣磷酸鈣、雙鈣磷酸鈣(DCP;dicalcium phosphate)、磷酸三鈣(TCP;tricalcium phosphate)、磷酸氫鈣、磷酸四鈣(TTCP;tetracalcium phosphate)、羥基磷灰石(HA;hydroxyapatite)、鍶羥基
磷灰石、鎂羥基磷灰石、銀羥基磷灰石的一種或多種,或DCP/TCP、DCP/TTCP、DCP/HA、TCP/TTCP、TCP/HA、TTCP/HA、DCP/TCP/TTCP、DCP/TCP/HA、DCP/TTCP/HA、TCP/TTCP/HA、DCP/TCP/TTCP/HA的混合物、組成物或加成物。
該放射微球以及該可吸收人工骨填補材料混合後與添加劑及液體攪拌,並可植入經腫瘤切除手術後之骨缺損部位成形固化,提供受力及細胞生長的支架並局部殺死殘留癌細胞,或可進一步利用造影核種進行分布觀察。
該添加劑係選自聚乙二醇、海藻酸鈉、聚乙烯醇、纖維素、殼聚糖、透明質酸、硬脂酸鈉、硬脂酸鎂、明膠中的一種或多種,優選為聚乙二醇、海藻酸鈉、透明質酸、殼聚糖、纖維素中的一種或多種。
該液體如純水、生理食鹽水、磷酸鹽類溶液、氧化石墨烯溶液、殼聚糖溶液、海藻酸鈉溶液、檸檬酸鈉溶液、透明質酸鈉溶液、聚乙烯醇溶液、聚乙二醇溶液、纖維素溶液、硝酸銀溶液、纖維素溶液、人工體液或人體血液等。優選為0.05~3重量%的透明質酸鈉溶液、0.05~3重量%的殼聚糖溶液、0.05~3重量%的海藻酸鈉溶液、水或血液。
本發明亦提供一種放射微球之製備方法,使包含以化學式Ca3Si2O7表示之玻璃粉末與氧化釔粉末之混合物熔融形成玻璃;冷卻該玻璃;研磨該玻璃以得到玻璃粉體;以及火焰熔射該玻璃粉體以形成放射微球,其中,該放射微球之球形度為0.71至1。
於一具體實施例中,該玻璃粉體經火焰熔射形成放射微球後,係於冷卻收集區收集。
該冷卻收集區可以為固體或液體介面,固體可為冰或乾冰,且液體可為可激發作為核種成分的液體(有機酸類/無機酸類)或水。
於一具體實施例中,該放射微球之製備方法復包括在熔融該混合物之前,在該混合物中添加造影核種氧化物粉末。
於一具體實施例中,該放射微球之製備方法復包括於該放射微球表面形成塗佈層。
具體而言,將混合粉末預先球磨混合均勻,再經高速氣體火焰加熱噴出,混合粉末受火焰加熱後,隨著高速燃燒氣體噴飛離焰心,混合粉末因高溫燃燒火焰加熱導致表面熔融,並在表面張力交互影響下形成高溫熔融液滴,該高溫熔融液滴於旋轉飛行過程中,逐漸因空氣溫度梯度與重力及液滴旋轉影響下形成球狀,隨著飛離焰心距離增加最終接觸冷卻收集區,受到冷卻收集區溫度梯度驟減,形成放射微球。
另一方面,於不同飛行距離與不同性質火焰的不同製程條件下,隨著放射微球飛離焰心距離的不同,使最終得到的形態會形成實心球體、中空球體或介孔球體。其中,火焰的組成取決燃燒氣體與氧氣的混合比例,詳言之,氧化焰中之氧氣和乙炔的混合比(Nm3/hr)大於1.2時,係為氧過剩火焰,其具氧化性;中性焰中之氧與乙炔混合比為1.1
至1.2,氧與乙炔充分燃燒,沒有氧與乙炔過剩之問題,且內焰具有一定還原性,使燃燒時所產生的CO2和CO具有保護作用;碳化焰中之氧與乙炔混合比小於1.1,使得乙炔過剩而具有較強的還原性,且火焰中有游離狀態的碳及過多的氫。
本發明透過實施例之示例來說明細節。不過,本發明之詮釋不應當被限制於以下實施例之闡述。
實施例(一)
將以化學式Ca3Si2O7所表示之玻璃粉末與氧化釔粉末以莫爾比80:20之比例進行均勻球磨混合,施以熔融形成玻璃後,進行粉末研磨,再施以火焰熔射在經過乙炔與氧氣混合的高速氣體(氣體比例1.1至1.2)火焰加熱噴出,以火焰溫度區間1200℃~2000℃,噴射距離50公分,飛行時間15秒,形成放射微球,該些放射微球如第1圖所示。將該些放射微球取樣進行瓦德爾球形度分析(如第2圖及表一所示),所得放射微球之球形度介於0.7276至1之間。
將該放射微球取樣10mg進行中子活化照射,在經過中子活化元素分析後,觀察到Ca的訊號,如表二所示。
實施例(二)
將以化學式Ca3Si2O7所表示之玻璃粉末與氧化釔粉末以莫爾比80:20之比例進行均勻球磨混合,再分別外加5重量%ReO、5重量%CuO、5重量%TeO等造影核種氧化物
粉末,施以熔融形成玻璃後,進行粉末研磨,再施以火焰熔射在經過乙炔與氧氣混合的高速氣體(氣體比例1.1至1.2)火焰加熱噴出,以火焰溫度區間1200℃~2000℃,噴射距離50公分,飛行時間15秒,形成放射微球。將該些分別外加ReO、CuO、TeO之放射微球取樣10mg進行中子活化照射,在經過中子活化元素分析後,觀察到Re、Cu及Te(I-131)的訊號,如表三所示。
實施例(三)
將以化學式Ca3Si2O7所表示之玻璃粉末與氧化釔粉末以莫爾比80:20之比例進行均勻球磨混合,再分別外加5重量%ReO、5重量%CuO、5重量%TeO等造影核種氧化物粉末,施以熔融形成玻璃後,進行粉末研磨,再施以火焰熔射在經過乙炔與氧氣混合的高速氣體(氣體比例1.1至1.2)火焰加熱噴出,以火焰溫度區間1200℃~2000℃,噴射距離50公分,飛行時間15秒,形成放射微球。於室溫下,將該些放射微球與10g半水硫酸鈣及0.5g硬脂酸鎂添加劑混合,再以3g純水為混合液體進行攪拌,結果都可成型可固化。
實施例(四)
將以化學式Ca3Si2O7所表示之玻璃粉末與氧化釔粉末以莫爾比80:20之比例進行均勻球磨混合,再分別外加5重量%ReO、5重量%CuO、5重量%TeO等造影核種氧化物
粉末,施以熔融形成玻璃後,進行粉末研磨,再施以火焰熔射在經過乙炔與氧氣混合的高速氣體(氣體比例1.1至1.2)火焰加熱噴出,以火焰溫度區間1200℃~2000℃,噴射距離50公分,飛行時間15秒,形成放射微球。於室溫下,將該些放射微球與10g單鈣磷酸鈣玻璃及0.5g硬酯酸鎂添加劑混合,再以3g PBS人工體液為混合液體進行攪拌,結果都可成型可固化。
實施例(五)
將以化學式Ca3Si2O7所表示之玻璃粉末與氧化釔粉末以莫爾比80:20之比例進行均勻球磨混合,再分別外加5重量%ReO、5重量%CuO、5重量%TeO等造影核種氧化物粉末,施以熔融形成玻璃後,進行粉末研磨,再施以火焰熔射在經過乙炔與氧氣混合的高速氣體(氣體比例1.1至1.2)火焰加熱噴出,以火焰溫度區間1200℃~2000℃,噴射距離50公分,飛行時間15秒,形成放射微球。於室溫下,將該些放射微球分別與10g(單鈣磷酸鈣玻璃混合半水硫酸鈣)混合,兩種粉末以1:4、1:1及4:1之比例進行調配,再以3g PBS人工體液為混合液體進行攪拌,結果都可成型可固化。
實施例(六)
將以化學式Ca3Si2O7所表示之玻璃粉末與氧化釔粉末以莫爾比80:20之比例進行均勻球磨混合,再分別外加5
重量%ReO、5重量%CuO、5重量%TeO等造影核種氧化物粉末,施以熔融形成玻璃後,進行粉末研磨,再施以火焰熔射在經過乙炔與氧氣混合的高速氣體(氣體比例1.1至1.2)火焰加熱噴出,以火焰溫度區間1200℃~2000℃,噴射距離50公分,飛行時間15秒,形成放射微球。於室溫下,將該些放射微球分別透過噴霧造粒方式於玻璃微球外包覆一有機或無機材料膜層(如表四所示)。結果顯示,該些放射微球可經包覆成型。
Claims (24)
- 一種放射微球,係包括:以化學式Ca3Si2O7表示之玻璃及包含在該玻璃中之氧化釔,且該放射微球之球形度為0.71至1,其中,該放射微球經中子活化照射後具放射性。
- 如申請專利範圍第1項所述之放射微球,復包括造影核種氧化物。
- 如申請專利範圍第2項所述之放射微球,其中,該造影核種氧化物之造影核種係選自由磷、鈣、鈉、錸、鈧、鑭、鈰、鐠、釹、鉕、釤、銪、釓、鋱、鏑、鈥、鉺、銩、鐿、鎦、錒-225、銻-127、砷-74、鋇-140、鉍-210、鉲-246、鈣-46、鈣-47、碳-11、碳-14、銫-131、銫-137、鉻-51、鈷-57、鈷-58、鈷-60、鏑-165、鉺-169、氟-18、鎵-67、鎵-68、金-198、鈥-166、氫-3、銦-111、銦-113m、碘-123、碘-125、碘-131、銥-192、鐵-59、鐵-82、氪-81m、鑭-140、鎦-177、鉬-99、氮-13、氧-15、鈀-103、磷-32、氡-222、鐳-224、錸-186、錸-188、銠-82、釤-153、硒-75、鈉-22、鈉-24、鍶-89、鎝-99m、鉈-201、氙-127、氙-133及釔-90所組成之群組中至少之一者。
- 如申請專利範圍第1項所述之放射微球,其中,該放射微球之粒徑為20至100μm。
- 如申請專利範圍第1項所述之放射微球,其中,該玻璃與氧化釔之莫爾比為80:20至70:30。
- 如申請專利範圍第1項所述之放射微球,復包括形成於 該玻璃表面上之塗佈層。
- 如申請專利範圍第6項所述之放射微球,其中,該塗佈層係包含有機材料、無機材料其中之一或其組合。
- 如申請專利範圍第7項所述之放射微球,該有機材料包含酸根、羥基、胺基或羧基。
- 如申請專利範圍第7項所述之放射微球,該有機材料包含可生物降解材料。
- 如申請專利範圍第7項所述之放射微球,該無機材料包含磷酸鹽類化合物、硫酸鹽類化合物、氯鹽類化合物、硝酸鹽類化合物或硼酸鹽類化合物。
- 如申請專利範圍第7項所述之放射微球,其中,該塗佈層係聚乙烯吡咯烷酮(polyvinylpyrrolidone)、聚乙烯醇(polyvinylalcohol)、羧甲基纖維素(carboxymethyl cellulose)、聚乙二醇(PEG6000)、甲基纖維素(methylcellulose)、羥丙基甲基纖維素(hydroxypropyl methyl cellulose)、羥丙基纖維素(hydroxypropyl cellulose)、阿拉伯膠(gum arabic)、聚L-乳酸/聚乳酸甘醇酸(PLLA/PLGA)或Ca3(PO4)2。
- 一種放射性填充組成物,係包括如申請專利範圍第1項所述之放射微球以及可吸收人工骨填補材料。
- 如申請專利範圍第12項所述之放射性填充組成物,其中,該可吸收人工骨填補材料係選自由硫酸鈣鹽、磷酸鈣鹽、碳酸鈣鹽及聚乳酸所組成群組之至少一者。
- 一種放射微球之製備方法,係包括: 使包含以化學式Ca3Si2O7表示之玻璃粉末與氧化釔粉末之混合物熔融形成玻璃;冷卻該玻璃;研磨該玻璃以得到玻璃粉體;以及火焰熔射該玻璃粉體以形成放射微球,其中,該放射微球之球形度為0.71至1,且該放射微球經中子活化照射後具放射性。
- 如申請專利範圍第14項所述之製備方法,復包括在熔融該混合物之前,在該混合物中添加造影核種氧化物粉末。
- 如申請專利範圍第15項所述之製備方法,其中,該造影核種氧化物之造影核種係選自由磷、鈣、鈉、錸、鈧、鑭、鈰、鐠、釹、鉕、釤、銪、釓、鋱、鏑、鈥、鉺、銩、鐿、鎦、錒-225、銻-127、砷-74、鋇-140、鉍-210、鉲-246、鈣-46、鈣-47、碳-11、碳-14、銫-131、銫-137、鉻-51、鈷-57、鈷-58、鈷-60、鏑-165、鉺-169、氟-18、鎵-67、鎵-68、金-198、鈥-166、氫-3、銦-111、銦-113m、碘-123、碘-125、碘-131、銥-192、鐵-59、鐵-82、氪-81m、鑭-140、鎦-177、鉬-99、氮-13、氧-15、鈀-103、磷-32、氡-222、鐳-224、錸-186、錸-188、銠-82、釤-153、硒-75、鈉-22、鈉-24、鍶-89、鎝-99m、鉈-201、氙-127、氙-133及釔-90所組成之群組中至少一者。
- 如申請專利範圍第14項所述之製備方法,其中,該放射微球之粒徑為20至100μm。
- 如申請專利範圍第14項所述之製備方法,其中,該如化學式Ca3Si2O7表示之玻璃粉末與氧化釔之莫爾比為80:20至70:30。
- 如申請專利範圍第14項所述之製備方法,其中,復包括於該放射微球表面形成塗佈層。
- 如申請專利範圍第19項所述之製備方法,其中,該塗佈層係包含有機材料、無機材料其中之一或其組合。
- 如申請專利範圍第20項所述之製備方法,該有機材料包含酸根、羥基、胺基或羧基。
- 如申請專利範圍第20項所述之製備方法,該有機材料包含可生物降解材料。
- 如申請專利範圍第20項所述之製備方法,該無機材料包含磷酸鹽類化合物、硫酸鹽類化合物、氯鹽類化合物、硝酸鹽類化合物或硼酸鹽類化合物。
- 如申請專利範圍第20項所述之製備方法,其中,該塗佈層係聚乙烯吡咯烷酮(polyvinylpyrrolidone)、聚乙烯醇(polyvinylalcohol)、羧甲基纖維素(carboxymethyl cellulose)、聚乙二醇(PEG6000)、甲基纖維素(methylcellulose)、羥丙基甲基纖維素(hydroxypropyl methyl cellulose)、羥丙基纖維素(hydroxypropyl cellulose)、阿拉伯膠(gum arabic)、聚L-乳酸/聚乳酸甘醇酸(PLLA/PLGA)或Ca3(PO4)2。
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US20200155715A1 (en) | 2020-05-21 |
CN111202871A (zh) | 2020-05-29 |
TW202019492A (zh) | 2020-06-01 |
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