结合牙（Concrescence of teeth）：为各牙的牙根发育完全以后发生粘连的牙，牙本质相互分离，即结合牙之间有各自相互独立的髓腔系统，偶见于上颌第二磨牙和第三磨牙区．多生牙（Supernumerary tooth）：又称额外牙，是指超过正常牙数...结合牙（Concrescence of teeth）：为各牙的牙根发育完全以后发生粘连的牙，牙本质相互分离，即结合牙之间有各自相互独立的髓腔系统，偶见于上颌第二磨牙和第三磨牙区．多生牙（Supernumerary tooth）：又称额外牙，是指超过正常牙数以外的牙齿．其好发部位多在上颌，尤以中切牙之间最多见；其次是牙弓末端第三磨牙之后，称为第四磨牙．多生牙发生率国内外报道稍有差异，国内报道为1%～3%，国外报道为1.04%～2.00%．昆明医科大学附属口腔医院门诊收治左上颌第三磨牙与两多生牙结合1例．展开更多
Objective To compare the long-term clinical effects of two kinds of crowns and bridges made of porcelain fused to Au-Pt alloy and Ni-Cr alloy. Methods A total of 131 teeth (64 patients) were rehabilitated using porcel...Objective To compare the long-term clinical effects of two kinds of crowns and bridges made of porcelain fused to Au-Pt alloy and Ni-Cr alloy. Methods A total of 131 teeth (64 patients) were rehabilitated using porcelain-fused-to-metal crowns, among which 59 were rehabilitated with Au-Pt alloy metal ceramic crown and 72 with Ni-Cr alloy metal ceramic crown. The porcelain fracture, shade, marginal adaptation, gingival discoloration, and gingival status after finishing restoration and 36 months of follow-up were evaluated. Results After 36 months of restoration, porcelain fused to Au-Pt alloy crown showed better clinical effects than porcelain fused to Ni-Cr alloy crown in shade, marginal adaptation, gingival discoloration, as well as gingival status (all P<0.05). Conclusion The Au-Pt alloy ceramic crown is superior to Ni-Cr alloy ceramic crown in long-term clinical effects.展开更多
Objective： The aim of the current study was to evaluate the effect of ultraviolet（UV） photofunctionalization of dental titanium implants with exposure to the oral cavity on osseointegration in an animal model. Meth...Objective： The aim of the current study was to evaluate the effect of ultraviolet（UV） photofunctionalization of dental titanium implants with exposure to the oral cavity on osseointegration in an animal model. Methods： Forty-eight titanium implants（Camlog~？ Conelog~？ 4.3 mmx9.0 mm） were placed epicrestally into the edentulous jaws of three minipigs and implant stability was assessed by measuring the implant stability quotient（ISQ）. Prior to implantation half of the implants were photofunctionalized with intense UV-light. After three months, the implants were exposed and ISQ was measured again. After six months of implant exposure, the minipigs were sacrificed and the harvested specimens were analyzed using histomorphometric, light, and fluorescence microscopy. Main results： Forty-two of 48 implants osseointegrated. The overall mean bone-implant contact area（BIC） was（64±22）%. No significant differences were found in BIC or ISQ value（multivariate analysis of variance（MANOVA）, P〉0.05） between implants with and without exposure to UV photofunctionalization. Conclusions： No significant effects were observed on osseointegration of dental titanium implants nine months after exposure of UV photofunctionalization.展开更多
文摘结合牙（Concrescence of teeth）：为各牙的牙根发育完全以后发生粘连的牙，牙本质相互分离，即结合牙之间有各自相互独立的髓腔系统，偶见于上颌第二磨牙和第三磨牙区．多生牙（Supernumerary tooth）：又称额外牙，是指超过正常牙数以外的牙齿．其好发部位多在上颌，尤以中切牙之间最多见；其次是牙弓末端第三磨牙之后，称为第四磨牙．多生牙发生率国内外报道稍有差异，国内报道为1%～3%，国外报道为1.04%～2.00%．昆明医科大学附属口腔医院门诊收治左上颌第三磨牙与两多生牙结合1例．
文摘Objective To compare the long-term clinical effects of two kinds of crowns and bridges made of porcelain fused to Au-Pt alloy and Ni-Cr alloy. Methods A total of 131 teeth (64 patients) were rehabilitated using porcelain-fused-to-metal crowns, among which 59 were rehabilitated with Au-Pt alloy metal ceramic crown and 72 with Ni-Cr alloy metal ceramic crown. The porcelain fracture, shade, marginal adaptation, gingival discoloration, and gingival status after finishing restoration and 36 months of follow-up were evaluated. Results After 36 months of restoration, porcelain fused to Au-Pt alloy crown showed better clinical effects than porcelain fused to Ni-Cr alloy crown in shade, marginal adaptation, gingival discoloration, as well as gingival status (all P<0.05). Conclusion The Au-Pt alloy ceramic crown is superior to Ni-Cr alloy ceramic crown in long-term clinical effects.
基金Project supported by the Camlog Foundation(No.CF 31401),Basel,Switzerland
文摘Objective： The aim of the current study was to evaluate the effect of ultraviolet（UV） photofunctionalization of dental titanium implants with exposure to the oral cavity on osseointegration in an animal model. Methods： Forty-eight titanium implants（Camlog~？ Conelog~？ 4.3 mmx9.0 mm） were placed epicrestally into the edentulous jaws of three minipigs and implant stability was assessed by measuring the implant stability quotient（ISQ）. Prior to implantation half of the implants were photofunctionalized with intense UV-light. After three months, the implants were exposed and ISQ was measured again. After six months of implant exposure, the minipigs were sacrificed and the harvested specimens were analyzed using histomorphometric, light, and fluorescence microscopy. Main results： Forty-two of 48 implants osseointegrated. The overall mean bone-implant contact area（BIC） was（64±22）%. No significant differences were found in BIC or ISQ value（multivariate analysis of variance（MANOVA）, P〉0.05） between implants with and without exposure to UV photofunctionalization. Conclusions： No significant effects were observed on osseointegration of dental titanium implants nine months after exposure of UV photofunctionalization.
