IPS e.max Press 热压铸后牙全瓷冠的临床研究

［摘要］ 目的 评价后牙IPS e.max press 全瓷铸造冠的临床效果。方法 共选取1 217例1 533颗后牙IPS e.max Press 铸瓷全冠修复体,修复3~24个月后,按照美国公共健康协会的修正标准进行修复体评估。结果 96.6%的修复体保持完整,未出现破裂、崩瓷、脱落、基牙冠折等并发症,患者满意度较高。结论 IPS e.max Press 全瓷修复体的近期修复效果良好。     

IPS e.max CAD全瓷冠修复的短期临床评价

目的 对IPS e.max CAD全瓷冠近期修复效果进行观察和评价。 方法 共选取469例542颗前、后牙IPS e.max CAD全瓷冠修复体,修复3~12个月后,按照美国加州牙科协会(CDA)制定的全瓷修复临床评定标准进行修复体评估。 结果 97.2%的修复体保持完整,未出现破裂、崩瓷、脱落、基牙冠折等并发症,患者满意度较高。 结论 IPS e.max CAD全瓷修复体的近期修复效果良好。     

IPS e.max Press LT易美铸瓷低度透明瓷块铸造全冠修复后牙缺损的临床观察

目的观察和评价IPS e.max Press LT易美铸瓷低度透明瓷块铸造全冠修复后牙缺损的效果。方法共选取63例98个IPS e.max Press LT易美铸瓷低度透明瓷块整体铸造全瓷冠修复体,修复3~12个月后按照美国公共健康协会的修正标准进行修复体评估。结果有93%的修复体颜色、形态、边缘着色、边缘密合度等各项检查达到A级,无崩瓷情况发生。结论IPS e.max Press LT易美铸瓷低度透明瓷块整体铸造全瓷冠具有较好的修复效果。     

前牙IPS e.max全瓷冠对牙龈影响的临床观察

目的 评价前牙IPS e.max全瓷冠对牙龈的影响.方法 镍铬合金烤瓷全冠修复后牙龈发炎、红肿的患者42例102颗前牙,拆除烤瓷冠,经牙周和根管治疗、桩核修复牙体缺损后,行IPS e.max全瓷冠修复,随访6～12个月,观察修复体颜色、牙龈状况及边缘密合性.结果 38例患者对修复体颜色满意,4例患者认为修复体颜色可接受;88个全瓷冠牙龈健康状况良好,14个全瓷冠牙龈健康状况可接受;102个全瓷冠边缘密合性好.结论 前牙镍铬合金烤瓷全冠修复失败后,可选用IPS e.max全瓷冠修复以改善修复体与组织的生物相容性.     

IPS e.max CAD LT低度透明瓷块修复后牙缺损的临床效果观察

目的评价应用IPS e.max CAD LT低度透明瓷块切割形成全解剖形态全冠修复后牙缺损的效果。方法选择我院就诊的54例IPS e.max CAD LT瓷全冠修复后牙患者、共计86颗牙单位为研究对象,修复后3、6、12个月根据美国公共健康协会的修正标准对修复体进行评价,并调查满意度。结果 12个月的追踪调查显示,86个修复体中,折断并脱落1个,96%的修复体颜色、形态、边缘着色、边缘密合度等各项检查达到A级,满意度达到94%。结论 IPS e.max CAD LT低度透明瓷块整体切割形成全解剖形态全冠修复体可获得理想的修复效果,具有较高的临床应用价值。     

热压铸全瓷高嵌体应用于前磨牙修复的临床研究

目的 评价IPS e.max press热压铸全瓷高嵌体在前磨牙修复中的临床效果.方法 选择经完善根管治疗的102颗牙冠缺损的前磨牙,制作IPS e.max press热压铸全瓷高嵌修复体,追踪观察36个月.结果 102件IPS e.max press热压铸全瓷高嵌体仅1件修复失败,成功率为99.02％.结论 IPS e.max press热压铸全瓷高嵌体修复前磨牙具有良好的修复效果,值得推广.     

IPS e.max Press铸瓷全冠修复效果的临床观察

目的:评价IPS e.max Press铸瓷全冠的临床修复效果。方法:对41例患者127颗前牙和前磨牙进行IPS e.maxPress热压铸瓷全冠修复,修复后12～42个月(平均28个月),参照美国公共卫生服务修正标准对修复体的颜色匹配、边缘着色、修复体折裂、继发龋、边缘适合度以及牙龈健康情况进行评价。结果:在颜色匹配方面,94.49%的修复体表现为A级,5.51%表现为B级;1.57%的全冠出现边缘着色;1颗(0.79%)修复体出现饰面瓷折裂;未发现继发龋;94.49%的修复体边缘适合度表现为A级,5.51%表现为B级;在牙龈健康方面,93.70%的修复体表现为A级,4.72%表现为B级,1.58%表现为C级。结论:在平均28个月的临床观察中,IPS e.max Press铸瓷全冠临床修复效果优良。     

IPS-Empress全瓷冠临床观察

目的 :探讨IPS -Empress可铸玻璃陶瓷的修复效果 ,为临床应用提供参考。 方法 :对 68例 179个全瓷冠修复 3年观察 ,对前牙和后牙全瓷冠单冠修复的临床效果进行评价。结果 :68例 79个修复体具有良好的边缘密合性 ,色泽稳定 ,强度高 ,成功率达 86.0 8%。前牙成功率 97.68% ,后牙成功率 70 .0 0 %。结论 :IPS -Empress是一种修复效果较好的全瓷修复材料     

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目的探讨IPS Empress 2可铸玻璃陶瓷嵌体修复后牙牙体缺损的临床疗效。方法对沈阳市和平区牙病防治所2010年6月至2012年6月接受治疗的后牙牙体缺损患者30例（48颗患牙）,采用IPS Empress 2可铸玻璃陶瓷嵌体修复,随访观察6个月至2年,参照改良的美国公共卫生服务（USPHS）评价标准对修复体的边缘适合性、外形、颜色匹配、继发龋发生以及磨损与折裂情况进行评价。结果 IPS Empress可铸玻璃陶瓷嵌体具有良好的边缘适应性及外形,色泽稳定,强度较高,未发现继发龋。结论 IPS Empress 2可铸玻璃陶瓷嵌体是一种修复后牙牙体缺损效果较好的修复体。     

CAD/CAM全瓷髓高嵌体在牙体缺损中的临床应用研究

目的　观察CAD/CAM全瓷髓高嵌体在牙体缺损中的临床效果。方法　选择71例病例(患牙82颗),其中男33例,女38例,年龄20~50岁,均采用IPS e.max CAD全瓷髓高嵌体进行后牙修复。随访24个月,观察修复体的颜色、形态、折裂、边缘密合度、基牙继发龋及邻接食物嵌塞的情况。结果　82颗修复体即刻满意度在85%以上。随访24个月中,失访4颗,78颗修复体形态和基牙继发龋方面均达到A级标准。1颗修复体轻微折裂,4颗出现邻接食物嵌塞,95%以上的修复体均达 A 级。结论　IPS e.max CAD全瓷髓高嵌体用于根管治疗的后牙短期修复效果良好。     

铸瓷髓腔固位冠修复根管治疗后牙齿的临床效果评价

目的:评价IPS e. max Press铸瓷髓腔固位冠修复经根管治疗的后牙牙体缺损的效果。方法:选择由牙体牙髓专业一年级研究生完成的铸瓷髓腔固位冠修复病例26例,均为行完善根管治疗后的后牙,18~24个月后回访检查。参考美国公共健康服务(USPHS)标准,对患牙继发龋、牙龈炎、牙折、修复体边缘完整性、边缘染色、修复体折裂/脱落情况进行评估。结果:26例病例中,1例修复体折裂,2例边缘完整性轻度受损,1例咬合面轻度缺损,其余未发现明显修复体的缺陷或因修复体引起的牙体、牙周等问题。结论:铸瓷髓腔固位冠修复根管治疗后的后牙牙体缺损可以取得满意的效果。     

Influence of resin cements and aging on the fracture resistance of IPS e.max press posterior crowns

The purpose of this study was to evaluate the effect of different adhesive cements and thermocycling on the fracture resistance of IPS e.max Press posterior single crowns. Thirty-two sound maxillary molars were subjected to standardized preparation and received IPS e.max Press crowns. Another 16 molars were left unprepared to serve as controls (group 1). Panavia F 2.0 and Rely X Unicem luting cements were used to bond the fabricated crowns (n = 16 each) to their respective prepared teeth. Eight specimens from each of the three groups were selected randomly for further thermocycling (5,000 cycles). All specimens were then subjected to fracture resistance testing using anatomical metal attachments fixed to the upper portion of the universal testing machine (1 mm/min). Data were analyzed statistically using two-way analysis of variance and the Student t test (α = .05). Natural teeth presented significantly higher (1,043 and 1,279 N) fracture resistance than that of adhesively cemented ceramic crowns (907 to 986 N) before and after thermocyling, respectively (P < .05). Cement type did not significantly affect fracture resistance results (986 N and 974 N for Panavia F 2.0 and Rely X Unicem, respectively; P > .05). Thermocycled specimens showed lower fracture resistance than that of nonthermocycled ones (P < .05). Neither conventional adhesive cement nor self-etching adhesive cement affected the fracture resistance of IPS e.max crowns. Thermocycling decreased the fracture strength of the crowns in both cement groups. Natural teeth fractured at significantly higher loads than the ceramic crowns.     

CAD/CAM全瓷高嵌体修复根管治疗后牙体缺损的临床评价

目的:采用瓷睿刻计算机辅助设计与制作(CAD/CAM)系统制作全瓷高嵌体修复根管治疗后的后牙牙体缺损,观察其1年期床疗效。方法::选取46例根管治疗后的后牙,使用瓷睿刻(CEREC)系统,IPS e.max CAD材料,制作全瓷高嵌体,双固化树脂水门汀粘结。修复后1年,采用改良USPHS标准对修复体、牙体、牙周等各方面指标进行评价,同时评价患者满意度。结果:87 ％的修复体各项检查标准都达到了USPHS 标准A类,患者满意率92％。CEREC 全瓷高嵌体1年期疗效确切。结论:使用瓷睿刻(CEREC)系统制作的 IPS e.max CAD全瓷高嵌体可作为根管治疗后后牙牙体缺损的有效修复方案。     

Fracture resistance of different partial-coverage ceramic molar restorations: An in vitro investigation

BACKGROUND: The authors conducted a study to evaluate the influence of preparation design on reliability and fracture resistance of press-ceramic posterior partial-coverage restorations (PCRs) under fatigue. They compared the results for PCRs fabricated of a new press ceramic (IPS e.max Press-VP 1989/4, Ivoclar-Vivadent, Schaan, Liechtenstein) with results for ceramic inlays and unprepared molars. METHODS: The authors randomly divided 96 human upper molars into six equal groups. Control group NP specimens remained unprepared. Control group IN specimens received a mesio-occlusal-distal (MOD) inlay preparation. The test groups received PCR preparation designs based on group IN's inlay design, with additional cuspal reduction that increased from group to group. The authors fabricated 16 ceramic inlays and 64 PCRs of IPS e.max Press and luted them adhesively. All specimens underwent masticatory fatigue loading (1.2 million cycles, 1.6 hertz, 98 newtons), 5,300 thermal cycles and observation for fracture patterns. Afterward, the authors loaded all surviving specimens until fracture. RESULTS: No fractures occurred during the exposure to the masticatory simulation. After undergoing loading in a universal testing machine, the groups showed no significant differences in fracture strength values (P = .6026). Thus, the different preparation designs of the PCRs demonstrated no significant influence on the restorations' fracture resistance. The median failure loads ranged from 1,567 to 1,960 newtons. CONCLUSION: All-ceramic PCRs for molars made of IPS e.max Press were shown to be fracture-resistant, results comparable with those of natural unprepared teeth. CLINICAL IMPLICATIONS: When a posterior ceramic PCR is indicated, the clinician should perform a defect-oriented preparation that preserves tooth structure. Further clinical investigations are recommended to verify the authors' in vitro results.     

Fracture Resistances of Cast Metal and Ceramic Dowel and Core Restorations: A Pilot Study

PURPOSE: The purpose of this study was to compare fracture strengths of teeth restored with cast metal and ceramic dowel and cores supporting all-ceramic crowns. MATERIALS AND METHODS: Eighteen recently extracted teeth were randomly divided into 3 equal groups. Metal dowel and cores (MDC) were fabricated for 1 group using a base metal alloy, and served as the control. The other groups received In-Ceram Spinell (ICS) and IPS Empress 2 (IPS) dowel and cores. IPS Empress 1 crowns were fabricated for all samples. Each tooth was subjected to a shear force at a crosshead speed of 2 mm/min on a universal testing machine until failure occurred. RESULTS: The mean fracture strengths and standard deviations of MDC, ICS, and IPS restorations were 1101 N (361), 832 N (288), and 1137 N (367), respectively. The differences between groups were insignificant (p < 0.05). Fractures of the all-ceramic crowns were observed in the MDC group, whereas the failure of ceramic dowel and core restorations was associated with root fracture at the cervical region. CONCLUSIONS: Due to improved mechanical properties, In-Ceram Spinell and IPS Empress 2 ceramic dowel and cores may be candidates for the restoration of endodontically treated anterior teeth.     

Randomized,Controlled Clinical Trial of Bilayer Ceramic and Metal‐Ceramic Crown Performance

Purpose : Analyzing the clinical performance of restorative materials is important, as there is an expectation that these materials and procedures will restore teeth and do no harm. The objective of this research study was to characterize the clinical performance of metal‐ceramic crowns, core ceramic crowns, and core ceramic/veneer ceramic crowns based on 11 clinical criteria. Materials and Methods : An IRB‐approved, randomized, controlled clinical trial was conducted as a single‐blind pilot study. The following three types of full crowns were fabricated: (1) metal‐ceramic crown (MC) made from a Pd‐Au‐Ag‐Sn‐In alloy (Argedent 62) and a glass‐ceramic veneer (IPS d.SIGN veneer); (2) non‐veneered (glazed) lithium disilicate glass‐ceramic crown (LDC) (IPS e.max Press core and e.max Ceram Glaze); and (3) veneered lithia disilicate glass‐ceramic crown (LDC/V) with glass‐ceramic veneer (IPS Empress 2 core and IPS Eris). Single‐unit crowns were randomly assigned. Patients were recalled for each of 3 years and were evaluated by two calibrated clinicians. Thirty‐six crowns were placed in 31 patients. A total of 12 crowns of each of the three crown types were studied. Eleven criteria were evaluated: tissue health, marginal integrity, secondary caries, proximal contact, anatomic contour, occlusion, surface texture, cracks/chips (fractures), color match, tooth sensitivity, and wear (of crowns and opposing enamel). Numerical rankings ranged from 1 to 4, with 4 being excellent, and 1 indicating a need for immediate replacement. Statistical analysis of the numerical rankings was performed using a Fisher's exact test. Results : There was no statistically significant difference between performance of the core ceramic crowns and the two veneered crowns at year 1 and year 2 (p > 0.05). All crowns were rated either as excellent or good for each of the clinical criteria; however, between years 2 and 3, gradual roughening of the occlusal surface occurred in some of the ceramic‐ceramic crowns, possibly caused by dissolution and wear of the glaze. Statistically significant differences in surface texture (p= 0.0013) and crown wear (p= 0.0078) were found at year 3 between the metal‐ceramic crowns and the lithium‐disilicate‐based crowns. Conclusion : Based on the 11 criteria, the clinical performance of ceramic‐ceramic crowns was comparable to that of the metal‐ceramic crowns after 2 years; however, gradual roughening occurred between years 2 and 3, which resulted in differences in surface texture and wear.     

CADCAM瓷贴面修复的临床效果探析

[摘要] 目的 评价CAD/CAM全瓷贴面修复前牙的临床效果。方法 选择98颗前牙,采用CEREC的椅旁CAD/CAM修复系统及IPS e.max CAD瓷块即刻完成修复体并粘结。参照改良Ryge评价方法,对临床使用1周、6个月、12个月、24个月的贴面在颜色匹配、瓷表面完整度、边缘染色、边缘适应性、术后敏感、牙龈健康状况、继发龋方面进行临床评价。结果 CAD/CAM全瓷贴面在这些方面的临床评级,90%以上达到A级。结论 用CEREC的椅旁CAD/CAM修复系统及IPS e.max CAD瓷块完成的贴面临床效果良好可靠。