纤维桩树脂核用于老年残根残冠修复的效果及对生活质量的影响

目的:探讨老年残根残冠应用纤维桩树脂核修复的临床效果及对病人生活质量的影响。方法:抽选我院行纤维桩树脂核修复的79例(86颗)老年残根残冠患者,对其进行3年随访,观察总体及不同牙位修复成功率和修复前、后生活质量的变化。结果:修复后进行3年随访,86颗残根残冠修复总成功率为95.3%,不同牙位修复成功率无显著差异(P0.05),均在94%以上,86颗牙失败4颗(其中2颗并发牙周炎、2颗牙纤维桩脱落,均未出现牙桩折断);修复后患者生活质量总分及各维度评分均明显优于修复前(P0.05)。结论:纤维桩树脂核是一种极为理想的残冠残根修复材料,能显著提高老年患者术后的生活质量,值得临床推广。     

玻璃纤维桩树脂核和金属铸造桩核修复上颌前牙残根残冠的疗效比较

目的:比较玻璃纤维桩树脂核和金属铸造桩核修复上颌前牙残根残冠的临床疗效。方法:选择2008年1月-2011年12月我院200例上颌前牙残根残冠患者,随机分为观察组与对照组,每组100例,观察组采用玻璃纤维桩树脂核修复,对照组采用金属铸造桩核修复,比较两组患者患齿修复成功率、修复后1、2年咀嚼效能有效率、修复前后患齿健康指数。结果:1观察组患者因牙龈炎、牙龈着色、冠折/根折、全冠松动/脱落、桩核松动/脱落而失败的发生率为2.0%、2.0%、1.0%、2.0%、1.0%,均低于对照组的6.0%、7.0%、5.0%、7.0%、5.0%,观察组总成功率为94.0%,显著高于对照的74.0%,两组数据比较差异均有统计学意义(均P0.05);2观察组修复后1、2年咀嚼功能改善有效率分别为94.0%、86.0%,对照组分别为89.0%、72.0%,比较差异均有统计学意义(均P0.05);3两组患者修复后抗折裂强度、GI、SBI均较修复前明显改善,比较差异有统计学意义(均P0.05),观察组修复后抗折裂强度、GI、SBI较对照组改善更明显,比较差异有统计学意义(均P0.05)。结论:玻璃纤维桩树脂核修复上颌前牙残根残冠具有较高成功率,咀嚼功能改善明显,临床效果优于金属铸造桩核修复。     

预成纤维桩和可塑纤维桩修复残根残冠的临床效果

目的:研究预成纤维桩和可塑纤维桩修复残根残冠的临床效果,并评估患者的咀嚼功能,为改善患者预后提供临床依据。方法:选择2014年9月-2015年8月在本院诊治的残根残冠修复患者136例,161颗牙,随机分为对照组和观察组,两组各68例,对照组80颗牙,应用可塑纤维桩修复;观察组81颗牙,应用预成纤维桩修复。观察两组患牙临床疗效,并评估咀嚼功能,观察其不良反应。结果:观察组的临床治疗效果和松动度均好于对照组,差异具有统计学意义(t=8.30、8.21,P0.05);观察组咬合力和咀嚼效率分别为(10.97±1.16)kg和(87.56±1.16)%,均高于对照组(9.38±1.04)kg和(83.38±1.04)%,差异具有统计学意义(t=9.16、9.70,P0.05);观察组就诊次数为(2.31±0.38)次,低于对照组(3.63±0.42)次,差异具有统计学意义(t=8.29,P0.05);两组患牙不良反应结果比较,差异无统计学意义(X~2=0.76,P0.05)。结论:预成纤维桩用于残根残冠临床修复效果好,有利于恢复患牙的咀嚼功能,减少患者的复诊次数。     

不同桩核修复上颌前牙残根残冠的疗效比较

目的:对比玻璃纤维桩树脂核与铸造金属桩核修复上颌前牙残根残冠的疗效。方法:选取2011年10月至2013年12月在我院口腔科就诊的120例因前牙牙体缺损或者冠折需行桩核冠修复术的患者,随机分为玻璃纤维桩组及铸造金属桩组,每组各60例。玻璃纤维桩组采取玻璃纤维桩核与烤瓷全冠修复术治疗,铸造金属桩组采取钴铬合金铸造桩核与烤瓷全冠修复术治疗。对比2组患者修复治疗的疗效及失败情况。结果:玻璃纤维桩组有1例(1颗)患者因搬迁失访,铸造金属桩组有2例(2颗)患者因金属致敏性导致治疗中断;余117例(179颗)患者中,玻璃纤维桩组共92颗牙,成功率为89.13%,铸造金属桩组共87颗牙,成功率为79.31%,玻璃纤维桩组的明显高于铸造金属桩组;玻璃纤维桩组牙根折裂、桩核松动或脱落的发生率明显低于铸造金属桩组;而桩核折的发生率则明显高于铸造金属桩组,差异有统计学意义(P0.05)。结论:玻璃纤维桩具有美观、抗疲劳、易于操作、患者复诊次数少等优势,且不存在细胞毒性及过敏反应等问题,其修复效果优于铸造金属桩核。     

不同桩核在残根残冠修复中的疗效比较

目的:观察成品螺纹桩、铸造钴铬合金桩核、纤维桩修复残根残冠的临床应用效果.方法:将90例患者90颗残根残冠,随机分成3组,分别采用A组成品螺纹桩,B组铸造钴铬合金桩核,C组纤维桩进行修复,并随诊18个月后,比较3组患者治疗后的成功率.结果:3组患者经过治疗后,成品螺纹桩组的成功率为73.33％,铸造钴铬合金桩核组的成功率为60.00％,纤维桩组的成功率为96.67％,三组差异有统计学意义(P＜0.005).结论:与成品螺纹桩和铸造钴铬合金桩核相比,纤维桩具有更好的粘结性及抗折能力.     

金属桩与玻璃纤维桩对老年上颌前牙残根残冠修复的临床疗效比较

目的:探讨金属桩与玻璃纤维桩对老年上颌前牙残根残冠修复的临床疗效。方法:收集我院口腔科收治的上颌前牙残根残冠修复患者40例,随机分为玻璃纤维桩组和金属桩组,每组各20例,玻璃纤维桩组患者给予玻璃纤维桩进行残根残冠修复,金属桩组给予金属桩进行残根残冠修复,治疗结束后1年随访,对所有患者的牙龈指数(GI)、修复齿出血指数(SBI)、不良反应发生率、患者修复效果以及患者疗效进行检测并比较。结果:与治疗前相比,两组患者的牙龈指数(GI)以及修复齿出血指数(SBI)均下降(P0.05);与金属桩组相比,玻璃纤维桩组患者的牙龈指数(GI)以及修复齿出血指数(SBI)较低(P0.05),不良反应发生率较低(P0.05),颜色匹配率以及边缘适合率较高(P0.05),两组患者修复体完整例数百分率比较无明显差异(P0.05),玻璃纤维桩组患者的治疗成功率较高(P0.05)。结论:玻璃纤维桩在老年上颌前牙残根残冠修复的应用与金属桩组相比临床效果较好。     

残根残冠的桩核修复

桩核冠是临床上保存残根残冠的修复方法之一,按种类可分为金属桩和非金属桩两大类。影响桩冠固位的因素很多,主要包括核的材料、桩的表面形态、长度、直径、箍结构、粘结剂、桩核预备时机及桩在牙列中的位置。只有掌握了这些内容,恰当的选择和利用,才能保证临床修复效果。     

纤维桩、纳米复合树脂结合氧化锆烤瓷冠对根管治疗后后牙楔状缺损患者美学效果及牙周组织的影响

摘要 目的：探讨纤维桩、纳米复合树脂结合氧化锆烤瓷冠对根管治疗后后牙楔状缺损患者美学效果及牙周组织的影响。方法：选取2018年1月至2019年3月期间我院收治的103例患者作为研究对象,按修复材料的不同分为对照组（n=52,患牙62颗）和研究组（n=51,患牙63颗）。对照组给予金属桩核、金属烤瓷冠修复,研究组给予纤维桩、纳米复合树脂结合氧化锆烤瓷冠修复。修复1年后,评价两组的修复成功率和修复效果。比较两组修复前及修复后1年的牙龈指数、菌斑指数、牙周探诊深度、龈沟液量及龈沟液中碱性磷酸酶（ALP）、天门冬氨酸转氨酶（AST）水平。结果：研究组的修复成功率比对照组高（P<0.05）。研究组修复体的表面光滑率、边缘密合性、固定良好率及颜色匹配率均明显高于对照组（P<0.05）。两组治疗后牙龈指数、菌斑指数及牙周探诊深度均明显低于治疗前（P<0.05）,龈沟液量及龈沟液中ALP、AST水平均明显低于治疗前（P<0.05）,同时研究组治疗后牙龈指数、菌斑指数及牙周探诊深度均低于对照组（P<0.05）,但两组治疗后龈沟液量及龈沟液中ALP、AST水平比较无差异（P>0.05）。结论：纤维桩、纳米复合树脂结合氧化锆烤瓷冠对根管治疗后后牙楔状缺损的修复成功率高,修复后美学效果佳,对牙周组织影响小。     

Embrace树脂和LuxaCoreZ-Dual树脂在纤维桩全冠修复牙冠严重缺损的效果对比

目的:比较Embrace树脂和Luxa Core Z-Dual树脂在纤维桩全冠修复牙冠严重缺损的效果。方法:将116颗牙冠严重缺损的患牙行根管治疗后随机分为两组,A组60颗(前牙39颗,后牙21颗)采用Embrace树脂及纤维桩全冠修复。B组56颗(前牙33颗,后牙23颗)采用Luxa Core Z-Dual树脂及纤维全冠修复,比较两组患牙的修复效果。结果:对所有患者随访3-12月,A组58颗牙修复体完好,失败2颗,成功率为96.66%,其中前牙失败2颗,成功率为94.87%,而后牙成功率为100%;B组54颗牙修复体完好,2颗失败,成功率为96.43%,其中前牙失败2颗,成功率为93.94%,而后牙成功率为100%,两组患牙修复体成功率比较差异无统计学意义(P0.05),4颗修复体的失败均因纤维桩松动脱落所致。结论:Embrace树脂和Luxa Core Z-Dual树脂在纤维桩全冠修复牙冠严重缺损时均具有良好的临床疗效,但Embrace树脂临床操作上更简便。     

高嵌体与纤维桩核冠修复对后牙牙体缺损疗效观察及对患者咀嚼能力和牙龈状况的影响

摘要 目的：观察高嵌体修复与纤维桩核冠修复对后牙牙体缺损疗效及对患者咀嚼能力和牙龈状况的影响。方法：选取2020年11月～2021年11月收治的60例牙体缺损患者作为研究对象,根据患者治疗意愿分为对照组和研究组,其中对照组26例、观察组34例。对照组行纤维桩核冠修复治疗,观察组行高嵌体修复治疗,对比两组患者修复效果、咀嚼功能、牙龈指数（GI）和菌斑指数（PLI）评分、并发症发生情况、满意度。结果：经统计发现,观察组邻面接触、表面质地、边缘密合度、舒适度等均优于对照组,两组比较具有明显差异（P<0.05）;修复前,两组患者咀嚼功能评分比较无差异（P>0.05）,修复后,观察组较对照组高（P<0.05）;修复前,两组GI和PLI评分比较无差异（P>0.05）,修复后,两组评分均有所降低,且观察组低于对照组（P<0.05）;观察组并发症发生率为2.94 %,对照组并发症发生率为11.54 %,观察组与对照组比较无差异（P>0.05）;观察组患者满意度为94.12 %,对照组患者满意度为73.08 %,观察组明显高于对照组（P<0.05）。结论：高嵌体修复与纤维桩核冠修复用于治疗牙体缺损,高嵌体修复的临床疗效更佳,患者咀嚼能力和牙龈健康程度明显提升,GI和PLI评分明显降低,有效减少并发症,提高满意度。值得临床推广使用。     

Fracture resistance of endodontically treated teeth restored with intra-radicular post: The effects of post system and dentine thickness

To investigate the influence of post system and amount of remaining root tissue on the fracture resistance of endodontically treated teeth. Seventy upper canine teeth were divided into seven groups (n=10), one control (sound teeth) and six experimental groups resulting from the interaction between the two study factors: post system (FB, fiber post; FPC, fiber post relined with resin composite; CPC, cast Ni–Cr alloy post and core) and amount of remaining root tooth tissue (2 or 1 mm of thick root). All teeth were restored with metal crowns and exposed to 250,000 cycles in a controlled chewing simulator. The samples were submitted to the fracture resistance test in a universal testing machine, at an angle of 135° and speed of 0.5 mm/min, until fracture occurred. Failure modes were observed, and the data of fracture resistance, in Newtons, were submitted to the analysis of variance (ANOVA), followed by Tukey′s test (α=0.05). Roots restored with FPC had the highest fracture strength of the experimental groups, being statistically similar to the intact teeth group (P>0.05). FP and CPC did not differ statistically (P>0.05) and were statistically lower than those of FPC (P<0.05). No statistically significant difference was observed between amounts of remaining root tooth tissue to the same post systems (P>0.05). A prevalence of irreparable failures was observed in specimens restored with CPC, whereas FP and FPC posts showed more repairable failures. The post system had an influence significant on fracture resistance. However, the remaining dentine with 2- or 1-mm thickness was not an important factor for the fracture resistance.     

The German debate on male circumcision and Habermas’ model of post‐secularity

This paper considers Habermas’ model of a post‐secular political order in the light of the debate on male circumcision that arose in Germany after a court ruled that male circumcision was an unjustifiable act of bodily harm. Central to this model is the idea that religious reasons can only become effective in central legal institutions when they are translated into secular reasons. My paper demonstrates that there are two distinguishable readings of this proviso. On the one hand, there is a broad reading according to which it is only necessary to reach a conclusion that is in line with the democratic principle stating that all citizens can be regarded as co‐legislators even if non‐generalizable value orientations might then shape the interpretation of fundamental rights (in the case of circumcision, the right to bodily integrity). On the other hand, a truly secular (narrow) reading would avoid the inclusion of non‐generalizable value orientations. The debate on circumcision demonstrates that these two interpretations lead to different and conflicting modes of justification. The broad reading allows for a justification of male circumcision, whereas the narrow reading makes such a justification unlikely. In addition, the filtering function of the proviso is weakened in a broad reading.     

Apple BT2 protein negatively regulates jasmonic acid‐triggered leaf senescence by modulating the stability of MYC2 and JAZ2

Jasmonic acid (JA) is shown to induce leaf senescence. However, the underlying molecular mechanism is not well understood, especially in woody plants such as fruit trees. In this study, we are interested in exploring the biological role of MdBT2 in JA‐mediated leaf senescence. We found that MdBT2 played an antagonistic role in MdMYC2‐promoted leaf senescence. Our results revealed that MdBT2 interacted with MdMYC2 and accelerated its ubiquitination degradation, thus negatively regulated MdMYC2‐promoted leaf senescence. In addition, MdBT2 acted as a stabilizing factor to improve the stability of MdJAZ2 through direct interaction, thereby inhibited JA‐mediated leaf senescence. Furthermore, our results also showed that MdBT2 interacted with a subset of JAZ proteins in apple, including MdJAZ1, MdJAZ3, MdJAZ4 and MdJAZ8. Our investigations provide new insight into molecular mechanisms of JA‐modulated leaf senescence. The dynamic JA‐MdBT2‐MdJAZ2‐MdMYC2 regulatory module plays an important role in JA‐modulated leaf senescence.     

Chromosome rearrangements induced in the mouse by embryonic x-irradiation. II. Irradiation of male foetuses at the 13.5th day of gestation

Pregnant females were exposed to 0, 100, 200 or 300 R of whole body X-irradiation at day 13.5 of pregnancy. Except for the dose of 300 R where only 7 males were used, 10 males chosen from the litters of different females were sacrificed 100 days after birth and for each testis 100 dividing spermatocytes were examined for the presence of chromosome rearrangements. No chromosome rearrangement could be detected in the spermatocytes of adult male mice irradiated at the foetal stage. On the other hand dividing spermatocytes are known to carry translocation configurations after exposure at the spermatogonial stage in the adult male mice. Thus large differences exist in this respect between the dividing gonocytes of the foetal male mouse and the type-A spermatogonia of the mature one.