内眦韧带的应用解剖及组织学研究

目的　研究内眦韧带的分支、走行、附着及其组织学构成。方法　对 6例 12侧尸颅内眦韧带进行解剖观察及测量 ,对 8例 8侧尸颅内眦结构进行组织学切片 ,光镜下观察内眦韧带的纤维构成及内眦区精细构造之间的关系。结果　内眦韧带前支的长度为 7.6± 1.5mm ,最大宽为 4 .5± 0 .7mm ,最小宽为 2 .3± 0 .5mm ;后支长度为 8.0± 1.0mm ,宽度为 6 .4± 1.4mm ;上支长度为 6 .7± 1.5mm ,宽度为 4 .5± 1.1mm ;前支距鼻颌缝的距离为 2 .8±1.0mm ,距鼻额缝的距离为 7.8± 1.5mm ;双侧韧带附着处之间的距离为 13.1± 2 .3mm。结论　内眦韧带由三个分支构成 ,均附着于骨膜。它们主要成分为胶原纤维 ,弹性纤维含量较少。眼轮匝肌内眦区的深层纤维通过组织移行参与构成内眦韧带。     

无鼾老年人上气道及周围结构矢状面测量分析

目的建立无鼾正常老年男女性上气道及周围结构矢状面52项测量项目的正常值范围并作比较。方法摄取无鼾正常老年男性38名、女性18名的X线头颅定位侧位片,测量分析上气道及周围结构52项测量项目,行统计学t检验。结果建立两组人群上气道及周围结构矢状面52项测量项目的正常值范围,老年男性上气道矢状面较宽,软腭、舌体较大,但软腭、舌体占口咽腔比例、上下颌骨关系、下颌平面角、软腭及舌的倾斜度、下气道咽后壁厚度两组差异无显著性。结论老年男女人群上气道及周围结构矢状面不尽相同,老年女性上气道矢状面宽度较男性窄。     

Effect of finish line variants on marginal accuracy and fracture strength of ceramic optimized polymer/fiber-reinforced composite crowns

STATEMENT OF PROBLEM: Ceramic optimized polymer (Ceromer)/fiber-reinforced composite (FRC) crowns have been promoted as alternatives to conventional crowns. However, little is known regarding the ideal tooth preparation for this type of crown. PURPOSE: This in vitro study evaluated the marginal adaptation and fracture strength of ceromer/FRC crowns with respect to the various types of finish lines. MATERIAL AND METHODS: Four metal dies with different finish lines (0.9-mm chamfer, 1.2-mm chamfer, 1.2-mm rounded shoulder, and 1.2-mm shoulder) were prepared. Forty (10 for each finish line) Targis/Vectris crowns were fabricated on duplicated base metal alloy dies. The restorations were stereoscopically evaluated at 56 points along the entire circumferential margin for measuring the margin adaptation before and after cementation with a resin luting agent. The specimens were then compressively loaded to failure using a universal testing machine. The marginal adaptation (microm) was analyzed with the Kruskal-Wallis test and post-hoc Dunnett test (alpha=.05). The fracture load (N) was analyzed with a 1-way analysis of the variance and the Scheffe adjustment (alpha=.05). The fractured surfaces of the crowns were examined with a scanning electron microscope to determine the mode of fracture. RESULTS: The marginal adaptation of crowns with a shoulder finish line was significantly better than crowns with a chamfer finish line before and after cementation (P<.001). The increased marginal gap after cementation was the lowest in the 1.2-mm rounded shoulder group. The fracture strength of the crowns with the 0.9-mm chamfer and crowns with 1.2-mm chamfer was significantly greater than those of the crowns with the 1.2-mm shoulder or rounded shoulder (P=.011, P=.049, respectively). The mean fracture load of all crowns, regardless of the finish line design, was 1646 N. The fractured surface of the crown revealed adhesive failure and 3 types of cohesive failure (fracture of the Targis and Vectris, Targis fracture with a crack in the Vectris layer, and crushing without fracture). CONCLUSION: The marginal gaps were greater for the chamfer finish line specimens than in the shoulder finish line specimens. However, the fracture strength of the chamfer finish line specimens was greater than that of the shoulder finish line specimens.     

低强度激光治疗颞下颌关节紊乱病的疗效评价

目的 评估低强度激光(LLLT)疗颞下颌关节痛的效果.方法 将颞下颌关节痛的患者按随机、双盲原则分为激光组(n=21)和对照组(n=21),每位患者均接受连续6d、每天1次的激光或假激光治疗.在治疗前、治疗后、治疗后1月、治疗后2月14个时点对患者的疼痛程度、功能状态进行测量和评估.结果 2组中疼痛视觉模拟评分(VAS...     

Use of separate single-tooth implant restorations to replace two or more consecutive posterior teeth: a prospective cohort study for up to 1 year

PURPOSE

The aim of this study was to evaluate the periodontal and prosthodontic complications of multiple freestanding implants in the posterior jaws for up to 1 year of function.

MATERIALS AND METHODS

Eight patients received 20 implants posterior to canines. Two or more implants were consecutively inserted to each patient. Single crowns were delivered onto the implants. Marginal bone loss, implant mobility, probing depth, and screw loosening were examined to evaluate the clinical success of such restorations for maximum 1 year of functional loading.

RESULTS

All the implants performed well during the observation period. Neither periodontal nor prosthodontic complications were found except a slight porcelain chipping. While the marginal bone level was on average 0.09 mm lower around the implant after 6 months of loading, it was 0.15 mm higher after 1 year.

CONCLUSION

Within the limits of this investigation, separate single-tooth implant restorations to replace consecutive missing teeth may clinically function well in the posterior jaw.     

近距离腔内放射治疗控制口腔癌术后复发的临床评价

目的:评价口腔癌术后近距离腔内照射控制复发的疗效及影响因素、临床应用价值.方法:口腔癌术后配合放射治疗患者238例,其中143例单独给予近距离腔内照射,95例同时给予近距离腔内照射和外照射.100例同期仅行手术治疗的病例作疗效对比.计算生存率和局部控制率.结果:手术治疗、术后配合腔内照射或同时配合腔内及外照射患者的5年和10年生存率分别是62%和22%,79%和62%以及71%和43%,3种治疗方法对肿瘤的5年和10年局部控制率分别是54%和52%,78%和76%以及72%和69%.UICC分期、病理分级、组织来源及肿瘤发生部位对生存率和局控率均有重要影响.结论:术后配合放疗可有效地控制口腔癌术后复发,尤以术后配合腔内照射更佳,该方法治疗后并发症少且疗效显著,可望成为新的、常规的口腔癌治疗手段.     

前列腺癌分子靶向治疗的研究进展

前列腺癌(PCa)是全球第二大男性肿瘤,中国PCa发病率呈逐年增长的趋势;晚期前列腺癌激素抵抗力的难治性及治疗药物的不良反应给患者带来严重的伤害。分子靶向治疗(MTT)能精确抑制肿瘤生长,具有降低不良反应的特性,是未来治疗前列腺癌的方向。本文对前列腺癌肿瘤细胞靶向治疗、肿瘤血管靶向治疗和免疫调节靶向治疗等分子靶向治疗研究进展进行了综述。     

Inverted U-Shaped Associations between Glycemic Indices and Serum Uric Acid Levels in the General Chinese Population: Findings from the China Cardiometabolic Disease and Cancer Cohort (4C) Study

Objective The relationship between serum uric acid(SUA)levels and glycemic indices,including plasma glucose(FPG),2-hour postload glucose(2 h-PG),and glycated hemoglobin(HbA1 c),remains inconclusive.We aimed to explore the associations between glycemic indices and SUA levels in the general Chinese population.Methods The current study was a cross-sectional analysis using the first follow-up survey data from The China Cardiometabolic Disease and Cancer Cohort Study.A total of 105,922 community-dwelling adults aged≥40 years underwent the oral glucose tolerance test and uric acid assessment.The nonlinear relationships between glycemic indices and SUA levels were explored using generalized additive models.Results A total of 30,941 men and 62,361 women were eligible for the current analysis.Generalized additive models verified the inverted U-shaped association between glycemic indices and SUA levels,but with different inflection points in men and women.The thresholds for FPG,2 h-PG,and HbA1 c for men and women were 6.5/8.0 mmol/L,11.0/14.0 mmol/L,and 6.1/6.5,respectively(SUA levels increased with increasing glycemic indices before the inflection points and then eventually decreased with further increases in the glycemic indices).Conclusion An inverted U-shaped association was observed between major glycemic indices and uric acid levels in both sexes,while the inflection points were reached earlier in men than in women.