中华口腔医学杂志
中華口腔醫學雜誌
중화구강의학잡지
Chinese Journal of Stomatology
2012年
7期
427-430
,共4页
李国强%沈晴昳%高建华%邬雪颖%陈骊%戴文安
李國彊%瀋晴昳%高建華%鄔雪穎%陳驪%戴文安
리국강%침청질%고건화%오설영%진려%대문안
计算机辅助设计%牙科铸造技术%牙冠(假体)%选择性激光熔覆技术
計算機輔助設計%牙科鑄造技術%牙冠(假體)%選擇性激光鎔覆技術
계산궤보조설계%아과주조기술%아관(가체)%선택성격광용복기술
Computer-aided design%Dental casting technique%Crowns%Selective laser melting
目的 比较选择性激光熔覆技术( selective laser melting,SLM)与铸造法制作的全冠适合性差异,以期为临床提供依据.方法 通过切削技术制作铝合金试件,设计3种试件直径:切牙8.6 mm,前磨牙7.2 mm,磨牙11.2 mm,每种16件.将试件分为SLM组和铸造组,分别制作钴铬合金全冠并用磷酸锌粘接剂粘接.扫描电镜下观察粘接面各测量点粘接剂厚度.结果 SLM组牙冠颈缘、试件下1/3区、轴面角处和(稔)面中央点间隙[分别为(36.51±2.94)、(49.36±3.31)、(56.48±3.35)和(42.20±3.60)μm]小于铸造组相应部位[分别为(68.86±5.41)、(58.86±6.10)、(70.62±5.79)和(69.90±6.00) μm],两组差异均有统计学意义(P<0.05).结论 铸造法和SLM制作的全冠适合性均在临床可接受的范围内,但SLM法更接近美国牙科协会的标准,值得推广应用.
目的 比較選擇性激光鎔覆技術( selective laser melting,SLM)與鑄造法製作的全冠適閤性差異,以期為臨床提供依據.方法 通過切削技術製作鋁閤金試件,設計3種試件直徑:切牙8.6 mm,前磨牙7.2 mm,磨牙11.2 mm,每種16件.將試件分為SLM組和鑄造組,分彆製作鈷鉻閤金全冠併用燐痠鋅粘接劑粘接.掃描電鏡下觀察粘接麵各測量點粘接劑厚度.結果 SLM組牙冠頸緣、試件下1/3區、軸麵角處和(稔)麵中央點間隙[分彆為(36.51±2.94)、(49.36±3.31)、(56.48±3.35)和(42.20±3.60)μm]小于鑄造組相應部位[分彆為(68.86±5.41)、(58.86±6.10)、(70.62±5.79)和(69.90±6.00) μm],兩組差異均有統計學意義(P<0.05).結論 鑄造法和SLM製作的全冠適閤性均在臨床可接受的範圍內,但SLM法更接近美國牙科協會的標準,值得推廣應用.
목적 비교선택성격광용복기술( selective laser melting,SLM)여주조법제작적전관괄합성차이,이기위림상제공의거.방법 통과절삭기술제작려합금시건,설계3충시건직경:절아8.6 mm,전마아7.2 mm,마아11.2 mm,매충16건.장시건분위SLM조화주조조,분별제작고락합금전관병용린산자점접제점접.소묘전경하관찰점접면각측량점점접제후도.결과 SLM조아관경연、시건하1/3구、축면각처화(임)면중앙점간극[분별위(36.51±2.94)、(49.36±3.31)、(56.48±3.35)화(42.20±3.60)μm]소우주조조상응부위[분별위(68.86±5.41)、(58.86±6.10)、(70.62±5.79)화(69.90±6.00) μm],량조차이균유통계학의의(P<0.05).결론 주조법화SLM제작적전관괄합성균재림상가접수적범위내,단SLM법경접근미국아과협회적표준,치득추엄응용.
Objective To investigate the marginal adaptation of crowns fabricated by selective laser melting( SLM ) and wax-lost-casting method,so as to provide an experimental basis for clinic.Methods Co-Cr alloy full crown were fabricated by SLM and wax-lost-casting for 24 samples in each group.All crowns were cemented with zinc phosphate cement and cut along longitudinal axis by line cutting machine.The gap between crown tissue surface and die was measured by 6-point measuring method with scanning electron microscope( SEM ). The marginal adaptation of crowns fabricated by SLM and wax-lost-casting were compared statistically.Results The gap between SLM crowns were (36.51 ±2.94),(49.36 ±3.31 ),( 56.48 ± 3.35 ),( 42.20 ± 3.60) μm,and wax-lost-casting crowns were ( 68.86 ± 5.41 ),( 58.86 ±6.10),(70.62 ±5.79),(69.90 ±6.00) μm.There were significant difference between two groups( P <0.05). Conclusions Co-Cr alloy full crown fabricated by wax-lost-casting method and SLM method provide acceptable marginal adaptation in clinic,and the marginal adaptation of SLM is better than that of wax-lost-casting method.