波恩式铸造全冠修复原活动义齿基牙对义齿固位力的效果评价

目的:评价波恩式方法制作的金属全冠修复可摘局部义齿基牙的效果.方法:选择48颗基牙残冠,首先恢复牙体解剖形态,然后利用波恩制作方法完成铸造金属全冠,基牙修复完成后,戴入原可摘义齿,定期临床检查,评价修复效果.结果:经过3～6个月的随访观察,48颗患牙经波恩冠修复后获得满意效果,1例患者出现牙龈炎.结论:可摘局部义齿基牙牙体缺损进行全冠修复时,波恩制作方法简单易行,效果好.     

可摘义齿基牙全冠修复的方法改进

可摘局部义齿修复后,由于基牙龋坏或牙冠部分劈裂需作金属全冠修复,但全冠修复后,通常出现可摘义齿的卡环和支托与基牙密合度差,或者影响可摘义齿固位;造成食物嵌塞;义齿下沉造成牙槽嵴压痛;或者需重新制作可摘义齿。我们改进了可摘义齿基牙铸造金属全冠修复的方法,共修复156件金属全冠,其中磨牙89件,双尖牙67件,效果满意。方法:1常规牙体预备、取模、超硬石膏灌注、制备可卸代型。2在石膏牙上涂分离剂,待干燥后,调自凝塑胶呈糊状期后,涂于代型上,初步形成牙冠外形,待塑胶完全硬固后,从石膏牙上取下塑胶冠。作初步的打磨成形。3口内试戴塑胶…     

可摘局部义齿修复后基牙金属全冠制作的临床体会

可摘局部义齿磨切牙体少,适应证广,价格适宜,但修复后多伴有不同程度的食物嵌塞,基牙邻接面易发生龋损,有些基牙常规充填治疗效果不好,往往需要做全冠加以保护.患者原义齿功能良好,不愿意更换,在其基牙上制作全冠后必须保证和原义齿的良好密合.笔者收集我院2005-09~2007-12 40 例共51 颗龋损基牙采用简便易行的方法制作金属全冠,收到良好的效果,现介绍如下.     

可摘局部义齿修复后基牙需作全冠修复的方法改进

临床常见一件精良的可摘义齿（包括铸造支架或塑胶铸造联合）的修复体。由于基牙牙冠出现龋坏或牙冠部分劈裂需作金属全冠修复,但全冠修复后,通常出现下列几种情况：①金属全冠修复后,可摘义齿的卡环和支托与基牙密合度差;②影响可摘义齿固位;③造成食物嵌塞;④义齿...     

可摘局部义齿修复后龈沟液中白介素-1变化的实验研究

目的：探讨可摘局部义齿对龈沟液中白介素-1（IL-1）表达水平的影响,为临床可摘局部义齿设计和制作提供依据。方法：对牙列缺损患者进行铸造支架式可摘局部义齿修复,修复后6个月,分别采取近缺隙侧基牙区和非基牙区龈沟液,用酶联免疫吸附法测定分析龈沟液中IL-1的表达水平。结果：可摘局部义齿修复后,近缺隙侧基牙区龈沟液中IL-1的表达水平升高,非基牙区无明显改变。结论：对于可摘局部义齿修复者,近缺隙侧基牙龈沟液中IL-1的表达水平升高,且明显高于非基牙区龈沟液IL-1水平。     

可摘局部义齿基牙楔状缺损充填修复的疗效评价

目的：比较应用GCFujiIXGP玻璃离子水门汀、Dyract复合材料及银汞合金三种材料对可摘局部义齿基牙颈部楔状缺损的临床修复疗效。方法：79例186颗楔状缺损可摘局部义齿基牙,缺损部位分别用GCFujiIXGP玻璃离子水门汀、Dyract复合材料及银汞合金修复,修复2年后用改良的USPHS系统评价修复体的疗效。结果：银汞合金修复效果好于另外两组。结论：银汞合金适合修复可摘局部义齿基牙的楔状缺损。     

隐形卡环在铸造支架式可摘局部义齿中的应用

目的：探讨隐形卡环在支架式可摘局部义齿中的临床应用效果。方法：55例患者制作83件隐形卡环支架式可摘局部义齿修复体,观察义齿的使用效果。结果：除1件修复体因咬合过紧致牙面脱落、一件修复体基牙脱落外。其余修复体使用效果良好,无基牙及牙周组织破坏。结论：只要选择合适的适应症,采用隐形卡环支架式可摘局部义齿修复可取得良好的临床疗效。     

可摘局部义齿重做情况问卷调查

目的：了解可摘局部义齿修复效果、使用年限,分析有关影响因素。方法：对323例重做可摘局部义齿患者进行问卷调查并统计分析。结果：84％以上患者修复效果满意;义齿平均使用年限为6．5年;义齿重做首要原因为又失牙,牙周炎失牙多于龋病,基牙失牙多于非基牙（P〈0．001）;与咀嚼能力有关因素依次为：义齿制作地点、失牙原因、余牙数、义齿颌位、患者年龄;与义齿使用年限有关因素依次为：患者年龄、戴牙习惯、吸烟情况、对颌情况等。结论：多数可摘局部义齿修复效果满意;义齿平均使用年限6．5年;应重视防治牙周炎和龋病,重视基牙保健;提高可摘局部义齿咀嚼能力与使用年限。     

糖尿病患者义齿修复后龈沟液中白介素-1变化的实验研究

目的：探讨糖尿病患者戴用可摘局部义齿后龈沟液中白介素-1（IL-1）的变化,从而为临床上糖尿病患者义齿修复方式的选择提供依据。方法：对牙列缺损的糖尿病患者进行钴铬合金铸造支架式可摘局部义齿修复,在修复后六个月时分别采取基牙和非基牙区的龈沟液,用酶联免疫吸附法测定分析IL-1的表达水平。结果：可摘局部义齿修复后,糖尿病患者近缺隙侧基牙区龈沟液中IL-1的表达水平明显升高,而非基牙区则无明显改变。结论：糖尿病患者可摘局部义齿修复对基牙龈沟液中IL-1的表达水平有影响,从而为临床义齿修复提供了一定的理论依据。     

SD球帽式附着体义齿与传统可摘局部义齿修复后基牙存留状况分析

目的：比较研究SD球帽式附着体义齿和传统可摘局部义齿不同时期基牙的存留状况。方法：选择60例肯氏Ⅰ类牙列缺损患者,分别行SD球帽式附着体义齿（30例）和传统可摘局部义齿（30例）修复,于修复前及修复后半年、1年、2年、4年检查基牙的龋患及牙周情况,并作统计学分析。结果：两种义齿的基牙龋患率有显著性差异（P〈0.05）;而2组病例的基牙牙龈炎、牙周炎发病率无显著性差异（P〉0.05）。结论：在肯氏Ⅰ类牙列缺损的修复中,SD球帽式附着体义齿基牙患龋率远远低于传统可摘局部义齿,但在对牙周组织的损害方面,SD球帽式附着体义齿并不比传统可摘局部义齿更具优越性。     

数字化技术在可摘局部义齿基牙全瓷冠崩瓷后再修复中的应用1例

数字化技术有助于提升可摘义齿基牙再修复的精准性及简便性,避免患者重行可摘义齿修复或利用旧活动义齿行手工堆塑基牙冠形态造成的误差,报告1例数字化技术在可摘局部义齿基牙全瓷冠崩瓷后再修复中的应用,取得了满意的治疗效果.     

Replacing an abutment crown for an existing removable partial denture

A method to replace an abutment crown for an existing removable partial denture has been presented.     

Temporization of abutment teeth preparations for existing removable partial dentures

An important aspect of restoring an abutment tooth for an existing removable partial denture is the construction of a temporary crown that fits an existing clasp so that the removable partial denture can be worn during the treatment procedures. A technique is illustrated that used a soft adjustable temporary metal crown for that purpose.     

Fabricating Crowns to Fit Existing Removable Partial Dentures: An Illustration of Two Techniques

The prosthetic treatment of a structurally compromised abutment tooth supporting a removable partial denture may present a variety of restorative modalities. Ideally, a surveyed crown is made for the individual tooth, which is later followed by a new removable partial denture fit to the contours of the crown. Frequently, however, the removable partial denture is clinically acceptable, and remaking the prosthesis is not indicated. In these cases, the crown can be made to fit the existing removable partial denture. Fabricating crowns to fit existing removable partial dentures can be accomplished using a direct method, an indirect method, or combinations of these techniques. Direct techniques traditionally use acrylic resin and inlay wax intraorally to develop a custom pattern that captures the contours of the clasp assembly. Indirect techniques use a pick-up impression to allow the crown pattern to be waxed against the denture framework on a cast in the laboratory. Combination methods use either a direct-indirect or indirect-direct approach. The direct-indirect method develops the preliminary resin pattern directly on the tooth and finalizes the contours in wax on a master cast. The indirect-direct technique initiates a crown pattern on a die and completes it either intraorally or on the die after the intraoral refinements. This article reviews the literature for methods of fabricating surveyed crowns under existing removable partial dentures. Additionally, two cases are presented that illustrate an indirect and combination direct-indirect technique for making the restorations.     

利用阻生智齿预备钛金属冠改善下颌义齿固位的应用观察

目的:利用阻生智齿增加下颌单颌总义齿固位力。方法:通过手术暴露下颌阻生智齿,在智齿冠上预备牙体,制作钛金属套冠将阻生齿牙冠形态转移至口腔中,从而把固位力不足的下颌单颌总义齿修复,转变成有正常基牙固位的可摘局部义齿修复。结果:通过3例利用埋伏阻生智齿接钛金属套冠,对下颌牙槽嵴严重吸患者的可摘局部义齿修复,经2～3年的临床观察,钛套冠固定良好,无松动,牙龈正常。可摘局部义齿固位良好。结论:利用埋伏阻生智齿接钛金属套冠,加强下颌牙槽嵴严重吸收可摘局部义齿固位力的效果明显。     

Fabrication of a New Crown and Provisional to an Existing Removable Partial Denture

A method of fabricating a new crown to an existing removable partial denture is described. A press-form plastic shell made from the diagnostic cast provides the outer contours for the abutment tooth, while an acrylic resin coping is fabricated on a die to provide accurate internal adaptation. The acrylic resin coping is seated on the prepared abutment. Autopolymerizing acrylic resin is mixed and placed in the plastic shell that is then placed in the mouth over the coping, forming the acrylic resin crown pattern. The removable partial prosthesis is fitted over the crown pattern intraorally. The pattern is transferred back to the die, the margins are refined, and the casting is completed and finished, avoiding reduction of the established contours. The same plastic shell is used with tooth-shaded acrylic resin to construct a provisional crown directly in the mouth. This technique allows the patient to wear the removable partial denture while the laboratory procedures are completed.     

Provisional restoration for abutment of an existing removable partial denture

The abutment of an existing removable partial denture may require a crown restoration. Fabrication of a provisional restoration to fit the existing clasp assembly requires special consideration. This article presents a simple technique for fabrication of such provisional restorations. An alginate impression is made of the arch with the removable partial denture in place. The abutment tooth is then prepared, providing adequate clearance between the clasp assembly and the tooth preparation. Cold curing acrylic resin of proper shade is mixed and poured in the impression of the abutment tooth. The impression is then seated in the mouth and removed before the acrylic resin is completely polymerized. The provisional restoration is then separated from the partial denture, finished and polished.     

Construction of a crown to fit a removable partial denture clasp.

This technique allows an accurate cast to be made of a prepared abutment tooth with the removable partial denture in place in the mouth. The partial denture is carefully removed from the cast, the crown waxed up, and the removable partial denture re-placed as many times as necessary during wax-up to obtain a crown that accurately fits the clasp.     

A provisional and new crown to fit into a clasp of an existing removable partial denture

A technique that forms an abutment crown to fit into an existing clasp of a removable partial denture by relining an acrylic resin pattern is described. The outer contour of the pattern is made within an irreversible hydrocolloid impression by use of Duralay autopolymerizing acrylic resin applied with precision dispensers. The pattern is formed before tooth preparation and is made approximately 0.4 mm thick. After tooth preparation, the shell pattern is relined with the same autopolymerizing resin and the existing removable partial denture is fitted over it. The gross pattern is trimmed and the margins refined on a die made from an elastomer impression. The refined pattern is cast and finished, avoiding reduction of the contours established. A second crown is similarly formed in tooth-colored autopolymerizing acrylic resin. It serves as a provisional restoration that allows the patient to wear the removable partial denture while the laboratory procedures are performed.