18q-syndrome with cleft lip and palate. A clinically diagnosed case

A case of a child with 18q-syndrome was encountered. The patient presented cleft lip and palate, narrow auditory canals, overlapping fingers, undescended testes and micropenis. Chromosome analysis demonstrated partial deletion of the long arm of one chromosome 18 in the patient and normal chromosomes in the parents. A cheiloplasty for repair of bilateral complete cleft lip was performed.     

Developmental anomaly of permanent teeth related to traumatic injury

Abstract A case is presented where a 4-year-old girl was injured in an automobile accident. The dental injury, intrusive luxation of the maxillary deciduous incisors, seemed unimportant at the time, since the child was in critical condition. The situation was first evaluated 5 years later, when the child was referred for treatment of an apical periodontitis originating from the right central incisor. The present case reflects several important aspects that were overlooked at the time of injury: the potential of intruded luxated deciduous teeth to cause developmental anomalies to the permanent dentition; the necessity of a longer follow-up period to detect such anomalies; and the need to develop effective treatment methods.     

单侧唇裂术后的鼻有解剖学研究

为探讨组织错位及组织发育不足与单侧唇裂鼻畸形的关系，对３８例伴有鼻畸形的单侧唇裂术后患者在鼻畸形修复术听健患侧鼻翼软骨大小及相对位置进行观察和测量，发现均存在患侧鼻翼软骨错位，若伴有患侧鼻软骨发育不足则鼻畸形更加严重。说明患侧鼻软骨组织错位及发育不足是造成唇裂鼻畸形的局部因素。     

颊癌中肿瘤转移抑制基因nm23mRNA的表达

通过Ｎｏｒｔｈｅｒｎ斑点杂交技术研究５２例颊癌及相关组织中肿瘤转移抑制基因ｎｍ３２－Ｈ１和ｎｍ２３－Ｈ２ｍＲＮＡ的表达。结果发现：颊癌组织中ｎｍ２３－Ｈ１和ｎｍ２３Ｈ２ｍＲＮＡ表达比正常颊粘膜、白斑、癌旁粘膜均有不同程度增高，颊癌有转移组中ｎｍ２３－Ｈ１ｍＲＮＡ表达比无转移组明显降低，转移灶中ｎｍ２３－Ｈ１ｍＲＮＡ的表达更低（Ｐ〈０．０５），ｎｍ２３－Ｈ１ｍＲＮＡ经无转移组明显降低，转移灶中ｎｍ２     

The management of the treatment and diagnosis for the calcifying odontogenic cyst]

18 Patients with calcifying odontogenic cyst underwent surgery in our Department from 1977 to 1993 were reported.8 male and 10 female aged from 11 to 52 with medium or 33 years were included.16 cases were pathologically confirmed as primary intraosseous cyst(central),and 2 as extraosseous cyst(peripheral).There was no recurrence after the local excision for preripheral calcifying odontogenic cyst and local curettage for central one.There were 3 in 6 cases of tumor typed cyst who had recurred postoperatively,two of them had recurred repeatedly and cured by means of local radiotherapy.The authors recommend that the tumor type of intraosseous calcifying odontogenic cyst be classified as a border-line tumor and treated as well as the principles of low malignant tumor.Post-operative radiotherapy could be used for recurrent cases.     

无牙颌患者的咬合垂直距离与咀嚼肌肌电关系的实验研究

作者选择了颌关系正常、能合作的15名无牙颌受试者。在4kg咬合力作用下，在不同的咬合垂直距离时，测定了颞肌及嚼肌的肌电幅值，实验结果表明，在控制咬合力状态下，无牙颌患者的咀嚼肌肌电幅值随着垂直距离增加而逐渐下降，两者间呈非常显著性负相关关系；在肌电活动变化过程中，有一相对稳定区域，由此提示，为无牙颌患者重建的咬合垂直距离有一定生理范围，约1.0mm(后牙区测点）。     

热侧压充填法根尖封闭能力研究

本研究通过根尖渗漏试验和可见光分光光度法比较热侧压充填法和传统侧压充填法的根尖封闭能力。结果表明：加用封闭剂热侧压充填法的根尖封闭能力最佳，优于单纯热侧压充填法（Ｐ＜０．０５）及传统侧压充填法（Ｐ＜０．０１）。但由于国产牙胶尖易粘至热充填器上带出，操作不便，目前推广应用热侧压法尚有困难。     

Protective efficacy of active and passive immunizations against experimental infection with Bacteroides gingivalis in ligated hamsters

The protective efficacy of immunization against Bacteroides gingivalis infection was examined in hamsters. Whole cells or extracted hemagglutinin of B. gingivalis 381 was injected with incomplete Freund adjuvant into the inguinal regions of hamsters. Two weeks after the rats received a booster injection, cotton threads were tied coronally to the gingival margins of the mandibular first molars, and then a streptomycin-resistant B. gingivalis 381R' strain was inoculated into the rats' oral cavities. The subcutaneous immunizations resulted in slight reductions in the numbers of B. gingivalis on the ligature threads compared with the sham-immunized group. Peroral administration of whole cells of B. gingivalis to hamsters elicited salivary immunoglobulin responses, but no reduction of B. gingivalis 381R' colonization was found in this group. Repeated passive immunizations with rabbit antiserum to B. gingivalis into the oral cavities of the hamsters resulted in a reduction in the number of organisms in the periodontal region.     

The use of dental anxiety questionnaires: a survey of a group of UK dental practitioners

AIM: To determine the frequency of use of dental anxiety assessment questionnaires and factors associated with their use in a group of UK dental practitioners. METHOD: A postal questionnaire to all 328 dentists whose names appear in the British Society for Behavioural Sciences in Dentistry Directory. Information collected for each practitioner included gender, year of qualification, type of practice in which anxious dental patients were treated, treatment used to manage anxious dental patients, type and frequency of use of dental anxiety assessment indices. RESULTS: Questionnaires were returned from 275 (84%) practitioners. 269 were analyzed. Only 54 practitioners (20%) used adult dental anxiety assessment questionnaires and only 46 (17%) used child dental anxiety assessment questionnaires. Male practitioners were more likely to report questionnaire use in comparison with females (P< 0.05), when treating dentally anxious adults (26% v 14%). In addition, practitioners providing intravenous sedation were more likely to use an adult dental anxiety questionnaire (P < 0.04) than those who did not use intravenous sedation (29% v 15%). The type of treatment provided had a significant association with the use of child dental anxiety. Those providing general anaesthesia (P = 0.03) and hypnosis (P = 0.01) for dentally anxious children were more inclined to use a questionnaire. CONCLUSION: The use of pre-treatment dental anxiety assessment questionnaires was low in this group of dentists. Male practitioners and those providing intravenous sedation, general anaesthesia or hypnosis seem more likely to use dental anxiety assessment questionnaires.