The value of the Gothic arch tracing in the positioning of denture teeth

Twenty-five subjects of three nationalities carried out Gothic arch tracings. Measurements between the side arms were compared with the upper intercuspid distances measured in the same subjects. A relationship was found which may be of value in the setting up of anterior maxillary denture teeth.     

A new guide for positioning of maxillary posterior denture teeth

There is no definitive method for the arrangement of artificial teeth in complete denture construction. A new method is introduced whereby the maxillary posterior teeth have been set in approximate positions mediolaterally similar to their natural predecessors. The procedure is based on a constant relationship derived from the natural dentition. Its clinical application proved to be suitable for the arrangement of artificial teeth for complete dentures with minimal errors.     

恒牙初期侧切牙反（牙合）的头影测量分析

目的研究恒牙初期1个及两个侧切牙同时反（牙合）对颌骨发育的影响.方法通过X线头影测量对76例恒牙初期侧切牙反（牙合）患者颅面硬组织形态选用DOWS分析法和Steiner分析法进行研究.结果一个侧切牙反（牙合）对上颌骨发育无影响,对下颌骨发育有一定影响,而两个侧切牙同时反（牙合）时,上下颌骨发育有显著影响.结论侧切牙反（牙合）宜早期进行矫治.     

山东地区成人正常殆后前位X线头影测量研究

目的：建立山东地区成人正常骀人群颅面宽度正常值、颅面部左、右结构生理性非对称率范围。方法：选择80例山东地区成人正常胎,男性44例、女性36例。由同一操作者严格定位拍摄头颅后前位X线片,确立X-Y坐标系,分析成人正常[牙合]颅颌面横向结构特征及性别差异。结果：建立山东地区成人正常黯头颅后前位X线头影测量数据库。结论：正常糌人群在水平向及垂直向呈较高的对称性,非对称率〈10％。各项骨测量线距均值,男性均大于女性。男女组间,角度测量值及面部比率呈较高的一致性,提示正常胎颅面结构关系的协调一致。     

固位纤维在种植过渡性义齿修复中的应用

目的:了解固位纤维在种植过渡性义齿修复中临床应用效果.方法:共完成固位纤维固定的种植过渡性义齿29例,对过渡性义齿松动、种植体周围牙龈、过渡性义齿对牙龈诱导及患者满意度等进行调查.结果:在3-6个月的追踪期内出现一例过渡性义齿松动经处理后恢复稳定;1例出现种植体周围牙龈轻度红肿,对症处理后痊愈;过渡性义齿能较好的诱导牙...     

The normal evolution of the cranium in three dimensions

Insight into the growth and development of the normal newborn cranial shape is essential to monitor cranial development, to detect and diagnose abnormal skull shapes, and for the long-term follow-up of craniosynostosis surgery. The aim of this study was to analyse the growth pattern of the cranial shape of infants during the first years of life using 3D stereophotogrammetry and 3D computed tomography (CT) with advanced 3D evaluation techniques. A large set of 3D photographs (n = 199) and CT scans (n = 183), taken between ages 0 and 54 months, was collected. Cranial shapes with artefacts and asymmetries were removed. Total volumes and intracranial volumes were obtained, as well as 3D and 2D measurements, including the cranial width, cranial length, cranial index, and suture lengths. Growth maps were created for all modalities to indicate 3D growth over time. For the final analysis, a total of 130 3D photographs, 94 hard tissue CT scans, and 76 soft tissue CT scans were used. 3D and 2D measures, volumes, growth maps, and growth animations were obtained. A non-uniform growth was revealed by the 3D growth maps. This study addresses the need for normative cranial evolution data to monitor healthy cranial development and for detection, follow-up, and treatment planning in craniosynostosis.     

Control of denture plaque and mucosal inflammation in denture wearers

The aims of this study were to collect data about the popular methods and materials used for cleaning dentures among complete and partial denture wearers in Jordan and to discuss the relationship between denture base plaque and mucosal inflammation under dentures. A questionnaire consisting of six questions regarding denture hygiene practices and cleaning products was completed by 321 patients who attended two prosthodontic clinics for replacement or adjustment of their dentures. Following careful oral examination and examination of dentures, the relationship between denture hygiene and inflammation under the denture base was investigated. In this study there were 615 dentures and 321 patients. The mean age of patients was 65 years and it ranged from 18 to 100 years (s.d. = 10.1). The mean age of their dentures was 7.3 years (s.d. = 5.6) ranging from one to 27 years. The most popular method of cleaning dentures was brushing. Ninety-four (29 per cent) of the denture wearers had denture stomatitis. There was a statistically significant relationship between poor denture hygiene and denture stomatitis (P = 0.0001). There was also a significant relationship between continuous wearing of the dentures, day and night, and denture stomatitis (P < 0.0001). The presence of bacterial and yeast plaque on the fitting surface of the denture base appeared to be of critical importance for development and maintenance of denture stomatitis. It is necessary, therefore, that dentists should give instructions to denture wearers on how to clean their denture surfaces properly so as to maintain good hygiene and prevent denture stomatitis.