牙体牙髓牙周病学杂志
牙體牙髓牙週病學雜誌
아체아수아주병학잡지
CHINESE JOURNAL OF CONSERVATIVE DENTISTRY
2015年
4期
244-247
,共4页
继发龋%充填修复%释氟材料%玻璃离子水门汀%复合树脂
繼髮齲%充填脩複%釋氟材料%玻璃離子水門汀%複閤樹脂
계발우%충전수복%석불재료%파리리자수문정%복합수지
secondary caries%filling restoration%fluoride-releasing materials%glass ionermer cement%compos-ite resin
目的：评价充填物边缘缝隙宽度对人工继发龋形成的影响，确定继发龋模型合适的缝隙宽度。方法：把牛牙釉质块包埋到圆环状模具内，然后对半纵切包埋后的试样，将其中一半重新放入模具内，用充填修复材料（Charisma，FujiⅦ）充填剩余空间，在材料与釉质纵切面间放置缝隙型片（厚度25、50、100、190、270μm），制备釉质与材料间有可控宽度缝隙的修复试样，浸入水中7 d后取出，脱矿72 h后用光固化树脂充填缝隙，垂直于缝隙方向制备150μm厚的切片，在正交偏振光显微镜下测量材料边缘釉质的表面龋损深度和洞壁龋损深度。结果：所有试样的表面龋损深度显著大于洞壁龋损，FujiⅦ组表面龋损深度显著小于Charisma组（P＜0．05）；缝隙宽度＜100μm时，随着宽度的增加，洞壁龋损深度也增加；缝隙宽度在50～100μm，FujiⅦ组的洞壁龋损深度小于Charisma组（P＜0．05）。结论：充填物有缝隙的继发龋模型能形成明显的表面龋损和洞壁龋损，当缝隙宽度在50～100μm时，能够充分展现释氟材料与无释氟材料预防人工继发龋的差异。
目的：評價充填物邊緣縫隙寬度對人工繼髮齲形成的影響，確定繼髮齲模型閤適的縫隙寬度。方法：把牛牙釉質塊包埋到圓環狀模具內，然後對半縱切包埋後的試樣，將其中一半重新放入模具內，用充填脩複材料（Charisma，FujiⅦ）充填剩餘空間，在材料與釉質縱切麵間放置縫隙型片（厚度25、50、100、190、270μm），製備釉質與材料間有可控寬度縫隙的脩複試樣，浸入水中7 d後取齣，脫礦72 h後用光固化樹脂充填縫隙，垂直于縫隙方嚮製備150μm厚的切片，在正交偏振光顯微鏡下測量材料邊緣釉質的錶麵齲損深度和洞壁齲損深度。結果：所有試樣的錶麵齲損深度顯著大于洞壁齲損，FujiⅦ組錶麵齲損深度顯著小于Charisma組（P＜0．05）；縫隙寬度＜100μm時，隨著寬度的增加，洞壁齲損深度也增加；縫隙寬度在50～100μm，FujiⅦ組的洞壁齲損深度小于Charisma組（P＜0．05）。結論：充填物有縫隙的繼髮齲模型能形成明顯的錶麵齲損和洞壁齲損，噹縫隙寬度在50～100μm時，能夠充分展現釋氟材料與無釋氟材料預防人工繼髮齲的差異。
목적：평개충전물변연봉극관도대인공계발우형성적영향，학정계발우모형합괄적봉극관도。방법：파우아유질괴포매도원배상모구내，연후대반종절포매후적시양，장기중일반중신방입모구내，용충전수복재료（Charisma，FujiⅦ）충전잉여공간，재재료여유질종절면간방치봉극형편（후도25、50、100、190、270μm），제비유질여재료간유가공관도봉극적수복시양，침입수중7 d후취출，탈광72 h후용광고화수지충전봉극，수직우봉극방향제비150μm후적절편，재정교편진광현미경하측량재료변연유질적표면우손심도화동벽우손심도。결과：소유시양적표면우손심도현저대우동벽우손，FujiⅦ조표면우손심도현저소우Charisma조（P＜0．05）；봉극관도＜100μm시，수착관도적증가，동벽우손심도야증가；봉극관도재50～100μm，FujiⅦ조적동벽우손심도소우Charisma조（P＜0．05）。결론：충전물유봉극적계발우모형능형성명현적표면우손화동벽우손，당봉극관도재50～100μm시，능구충분전현석불재료여무석불재료예방인공계발우적차이。
AIM:To evaluate the effect of the gap width around a restoration on the formation of artificial caries lesion.METHODS:Each of bovine enamel blocks was invested into a metal ring and then was cut longitudinal-ly into 2 equal portions.One portion was inserted into the ring again and the cut surface of the enamel block was ad-hered with a plastic space sheet,with a thickness(μm)of 25,50,100,190 and 270 respectively,followed by inser-tion of a restorative material (Charisma and Fuji Ⅶ respectively)into the residual space of the ring.All restoration specimens were immersed in water for 7 d and then in demineralization solution for 72 h,followed by filling each gap with a light curing sealant resin.Each specimen was cut vertically through the gap to obtain slices of 150 μm thick for the observation under a polarized light microscope and the depths of outer lesion and wall lesion of each specimen were measured using image analysis software.RESULTS:All specimens presented a deeper outer lesion than wall lesion (P<0.05)and Charisma group presented deeper outer lesion than FujiⅦgroup(P<0.05).The depth of wall lesion increased with the increase of the gap width within 100 μm and the Charisma group showed deeper wall lesion than FujiⅦ group(P<0.05 )when the gap width was within 50 ~100 μm.CONCLUSION:The artificial secondary caries model with controlled marginal gap can present obvious out lesion and wall lesion and present the difference of fluoride-releasing materials and non-fluoride-releasing materials in preventing wall lesion.
