UB-I粘结剂粘结面的微形态观察

目的：研究UB-Ⅰ粘结剂的粘结界面和粘结表面的微形态特点。方法：用扫描电子显微镜观察UB-Ⅰ和牙本质的粘结界面和粘结表面。结果：UB-Ⅰ粘结剂在牙本质小管内可聚合形成树脂突，在牙本质小管内的树脂突表面有树脂侧枝呈树枝状横行排列，并且和相邻的树脂突相连接，在牙本质和复合树脂之间有杂合层形成。结论：UB-Ⅰ粘合剂具有良好的渗透性，与牙本质之间可以形成良好的机械嵌合。     

豚鼠内耳前庭感觉毛细胞的分离

用机械分离法从豚鼠前庭感觉上皮中分离出不同种类的前庭感觉毛细胞（ＶＨＣ）。ＶＨＣ主要可分为Ⅰ型和Ⅱ型细胞。两种细胞形态虽有所差异，但一般均有四形或瓶形胞体，胞核位于细胞基部，胞颈和纤毛变化较大。细胞的活性可通过１％中性红染色鉴定，发现在室温下，１ｈ内大约９０％以上的分离ＶＨＣ可维持其正常形态和活性。并参照对外毛细胞形态的研究提出活性ＶＨＣ的鉴别标准。此项工作为进一步研究ＶＨＣ的感觉机制和某些疾病的发生机理打下了基础。     

A randomized prospective comparision of two methods of administering topical treatment in otitis externa

Ten patients with bilateral moderate or severe otitis externa were studied. Following aural toilet each patient was subjected to two different treatments: one ear had alternate day dressings containing a topical antibiotic/steroid mixture, while the external canal of the other was filled with the same topical preparation (sump filling). Improvement in the severity of the otitis externa was assessed after 1 week. 9 out of 10 ear canals improved in each group. An estimate of the relative cost of each treatment was made and sump filling was found to be less expensive. The results suggest that sump filling is a low cost alternative to standard treatment in moderate and severe otitis externa.     

A critical period for functional vestibular development in zebrafish.

We have determined a critical period for vestibular development in zebrafish by using a bioreactor designed by NASA to simulate microgravity for cells in culture. A critical period is defined as the briefest period of time during development when stimulus deprivation results in long lasting or permanent sensory deficits. Zebrafish eggs were collected within 3 hours of being laid and fertilized. In experiment 1, eggs were placed in the bioreactor at 3, 24, 30, 36, 48, or 72 hours postfertilization (hPF) and maintained in the bioreactor until 96 hPF. In experiment 2, eggs were placed in the bioreactor immediately after they were collected and maintained in the bioreactor until 24, 36, 48, 60, 66, 72, or 96 hPF. Beginning at 96 hPF, all larvae had their vestibulo-ocular reflexes (VOR) evaluated once each day for 5 days. Only larvae that hatched from eggs that were placed in the bioreactor before 30 hPF in experiment 1 or removed from the bioreactor later than 66 hPF in experiment 2 had VOR deficits that persisted for at least 5 days. These data suggest a critical period for vestibular development in the zebrafish that begins before 30 hPF and ends after 66 hPF. To confirm this, zebrafish eggs were placed in the bioreactor at 24 hPF and removed at 72 hPF. VORs were evaluated in these larvae once each day for 5 days beginning at 96 hPF. These larvae had VOR deficits that persisted for at least 5 days. In addition, larvae that had been maintained in the bioreactor from 24 to 66 hPF or from 30 to 72 hPF, had only temporary VOR deficits. In a final experiment, zebrafish eggs were placed in the bioreactor at 3 hPF and removed at 96 hPF but the bioreactor was turned off from 24 hPF to 72 hPF. These larvae had normal VORs when they were removed from the bioreactor at 96 hPF. Taken as a whole, these data support the idea that there is a critical period for functional maturation of the zebrafish vestibular system. The developmental period identified includes the timeframe during which the vestibular primary afferent neurons are born, innervate their central and peripheral targets, and remodel their central projections.     

环丙沙星滴耳液对内耳影响的研究

豚鼠中耳（听泡）内滴入０．５％、１％、２％环丙沙星与庆大霉素滴耳液７天或２１天，借助光镜和扫描电镜观察内耳的显微和超微结构变化。结果证明环丙沙星对内耳没有明显的毒性作用。庆大霉素则使耳蜗明显受损，以底回为重，Ｃｏｒｔｉ’ｓ器外毛细胞坏死较多，内毛细胞及支持细胞病变较轻。位觉斑耳石脱落，毛细胞纤毛粘连、脱落。壶腹嵴中央区纤毛也缺失。本实验对客观评价环丙沙星对内耳的作用及临床使用提供了形态学资料。     

高效液相色谱法测定微量耳血中头孢他定的浓度

本文介绍采取微量耳血以高效液相色谱法测定头孢他定（Ｃｅｆｔａｚｉｄｉｍｅ）的血药浓度。血样经６％高氯酸沉淀蛋白，流动相为含２５％甲醇的０．０５ｍｏｌ／Ｌ醋酸铵溶液，以冰醋酸调节ｐＨ值至４～５，检测波长为２５４ｎｍ，内标物为头孢唑啉（Ｃｅｆａｚｏｌｉｎ）。经对家兔采取微量耳血测定其血药浓度，可知头孢他定为二室模型，Ｔ＿１／２α为０．１８±０．０５ｈ，Ｔ＿１／２β为１．７５±０．０７ｈ。并对３名住院病人静脉注射１ｇ头孢他定后定时分别取微量耳血进行分析，所得结果与文献基本一致。本文方法简便、快速，结果令人满意。     

脐疗配合耳穴贴压治疗便秘26例

目的 探讨济疗配合耳穴疗法对便秘的疗效。方法 将50例便秘患随机分成两组，治疗组用济部药物贴敷配合耳穴贴压治疗；对照组单纯用于穴贴压治疗，所获数据采用t检验。结果 治疗组有效率96．15％，对照组有效率83．33％，经统计学处理，P＜0．01，有显性差异。结论 济疗联合耳穴贴压治疗便秘疗效较单纯耳穴贴压效果好，且简单方便，无副作用。     

Intratympanic steroid therapy for inner ear diseases, a review of the literature

To evaluate the value of clinical trials on intratympanic steroid therapy in Ménière’s disease (MD), idiopathic sudden sensorineural hearing loss (ISSNHL) and rapidly progressive sensorineural hearing loss (RPSNHL). Medline and Pubmed databases from 1966 to present were searched for clinical studies on intra- or transtympanic (cortico)steroid therapy of MD, ISSNHL and RPSNHL. Results were cross-checked with additional databases to obtain a complete data set. Clinical trials were evaluated on the basis of comparability, internal and external validity. Articles were judged using the following questions: was a randomised double-blind controlled trial performed? Which criteria were used to confirm the diagnosis of MD, ISSNHL, RPSNHL? Which therapy was evaluated? How long was the follow-up? Which criteria were used to evaluate the results? Reliable evidence on the efficiency, optimum dosage and administration schedule of intratympanic steroid therapy in MD, ISSNHL and RPSNHL is lacking, therefore further investigation is required.     

耳穴压豆法治疗儿童哮喘50例

采用耳穴压豆法治疗儿童哮喘５０例，并随访１年。结果：痊愈１１例；好转３７例；无效２例，总有效率为９６％。认为此法不仅能预防哮喘的发作，还能避免药物引起的副作用。