数码相机在正畸患者面He像摄影中的应用

数码相机应用到正畸临床是影像数字化技术发展的结果.本文阐述了数码相机与普通光学相机相比较的优点及其结构特点,提供了正畸临床对患者面.像摄影时选择数码相机的主要性能指标和相应的辅助器材.与正畸临床面(牙合)摄影相关的数字成像的性能指标中最重要的是分辨率、压缩方式与压缩比例.应用数码相机拍摄面(牙合)像的拍摄技术及取景范围与普通光学相机相同,文中讨论了相关拍摄参数以及影像资料输入计算机的方式.     

Comparison of 10 digital SLR cameras for orthodontic photography

Digital photography is now widely used to document orthodontic patients. High quality intra-oral photography depends on a satisfactory 'depth of field' focus and good illumination. Automatic 'through the lens' (TTL) metering is ideal to achieve both the above aims. Ten current digital single lens reflex (SLR) cameras were tested for use in intra- and extra-oral photography as used in orthodontics. The manufacturers' recommended macro-lens and macro-flash were used with each camera. Handling characteristics, colour-reproducibility, quality of the viewfinder and flash recharge time were investigated. No camera took acceptable images in factory default setting or 'automatic' mode: this mode was not present for some cameras (Nikon, Fujifilm); led to overexposure (Olympus) or poor depth of field (Canon, Konica-Minolta, Pentax), particularly for intra-oral views. Once adjusted, only Olympus cameras were able to take intra- and extra-oral photographs without the need to change settings, and were therefore the easiest to use. All other cameras needed adjustments of aperture (Canon, Konica-Minolta, Pentax), or aperture and flash (Fujifilm, Nikon), making the latter the most complex to use. However, all cameras produced high quality intra- and extra-oral images, once appropriately adjusted. The resolution of the images is more than satisfactory for all cameras. There were significant differences relating to the quality of colour reproduction, size and brightness of the viewfinders. The Nikon D100 and Fujifilm S 3 Pro consistently scored best for colour fidelity. Pentax and Konica-Minolta had the largest and brightest viewfinders.     

Use of a wireless local area network in an orthodontic clinic

Radiographic images and other patient records, including medical histories, demographics, and health insurance information, can now be stored digitally and accessed via patient management programs. However, digital image acquisition and diagnosis and treatment planning are independent tasks, and each is time consuming, especially when performed at different computer workstations. Networking or linking the computers in an office enhances access to imaging and treatment planning tools. Access can be further enhanced if the entire network is wireless. Thanks to wireless technology, stand-alone, desk-bound personal computers have been replaced with mobile, hand-held devices that can communicate with each other and the rest of the world via the Internet. As with any emerging technology, some issues should be kept in mind when adapting to the wireless environment. Foremost is network security. Second is the choice of mobile hardware devices that are used by the orthodontist, office staff, and patients. This article details the standards and choices in wireless technology that can be implemented in an orthodontic clinic and suggests how to select suitable mobile hardware for accessing or adding data to a preexisting network. The network security protocols discussed comply with HIPAA regulations and boost the efficiency of a modern orthodontic clinic.     

Failed appointments in an orthodontic clinic.

BACKGROUND: The aim of this study was to retest the hypotheses of Reekie and Devlin (1998) by conducting a similar randomized controlled trial in an orthodontic clinic in the Netherlands. It was hypothesized that a reminder would reduce the failed attendance rate and that the form of the reminder would be irrelevant. METHODS: All patients with appointments in the orthodontic clinic at the Academic Centre of Dentistry Amsterdam during a 3-week period were divided into 4 groups. Three groups received a reminder 1 day before the appointment, either by telephone, mail, or short message service (SMS, a service used to send and receive short text messages to and from cell phones). A control group did not receive a reminder. In a follow-up study, random subsamples in each group were interviewed by telephone. Subjects were asked how they felt about receiving a reminder and which reminder they preferred. RESULTS: The hypothesis that a reminder would reduce the failed attendance rate was not confirmed. Also, no differences were found between the 4 conditions, indicating that the form of the reminder is irrelevant. However, most of the interviewed participants felt positive or very positive about receiving a reminder. There was a significant preference for a reminder by mail (56.3%), followed by a telephone reminder (26.0%) and a reminder by SMS (17.7%). No less than 20% of the interviewed participants felt negative or very negative about the reminders and considered them to be a waste of time and money. CONCLUSIONS: The hypothesis that reminders are useful in the prevention of failed appointments was not confirmed. This study underlines the importance of replication studies. It demonstrates that every research result, whether it is generated by evidence-based or tradition-based research, should be interpreted with care and should be replicated in other studies before the results can be generalized.     

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随着成人正畸患者的增多,矫治过程中的美观问题越来越受到关注。一些“隐形”矫治技术快速发展且应用于正畸临床,如舌侧矫治技术、无托槽矫治技术等。伴随材料学、生物力学等多学科的发展,舌侧矫治技术日趋成熟,作为一种高效美观的矫治技术已得到广泛应用。本文将对舌侧矫治技术的发展、组成、优缺点、临床操作、生物力学以及应用前景做一综述。     

数码摄影在口腔医学领域的应用

数码摄影在口腔医学领域的应用包括临床资料保存、医患沟通、美学信息医技交流以及美学牙科的科研工作。拍摄好的口腔医疗数码影像需要使用合适的拍摄器材,掌握基本的摄影知识,了解口腔临床摄影的基本要求与方法。本文对这些问题的基本理论、常用方法及研究进展进行了介绍。     

Logistics in digital orthodontic models

Time has come for the replacement of traditional plaster models by digital ones. Digital technology now fulfills our diagnostic and medico-legal purposes. The American Board of Orthodontics (ABO) recognizes the value of digital models. The technology is available and affordable. The advantages of digital models surpass the advantages over plaster models. The purpose of this article is to expose the reader to the logistics of digital models and let you ask the pertinent question: is it time for me to go digital?     

Assessing aesthetic composite veneer placement via digital photography.

Restoring teeth using direct composite veneers can be quite challenging for a clinician. Achieving natural color blending, masking dark teeth, removing decay, and providing a natural finish require meticulous placement with various composite opacities and shades. Critical self-evaluation using digital photography, documentation, and follow-up visits to perform veneer enhancements are critical to ensure an aesthetic outcome. This article will demonstrate how digital photography is used to achieve an aesthetic result in the placement of eight direct resin veneers.     

The vision of digital dental photography

Digital dental photography has been crucial to the advancement of cosmetic dental procedures. It is an effective and necessary tool in the aesthetic dentist's armamentarium. Practice will allow the dentist to archive treatment results and allow every case to be improved. Dentists wishing to advance their techniques and to complete accreditation protocols should master these techniques.     

Reliability of digital orthodontic setups

Objective:To evaluate the reliability of digital orthodontic setup technology by comparing it with manual setups and models cast at the end of orthodontic treatment.Materials and Methods:Initial models, manual setups, and final models of 20 patients were used. The initial and final models, as well as the manual setups, were scanned using a 3Shape R-700 scanner, while the digital setups were fabricated based on the initial models using 3Shape OrthoAnalyzer software. Evaluation of the models based on the manual setup, digital setup, and final models of each patient was performed using the following linear measurements: intercanine widths, intermolar widths, and length of the upper and lower dental arches.Results:The results disclosed that none of the measures assessed through the manual setup, digital setup, and final models showed statistically significant differences (P > .05).Conclusions:Based on these findings, it can be inferred that digital setups are as effective and accurate as manual setups and constitute a tool for diagnosing and treatment planning that can be reliably reproduced in orthodontic treatments.     

Interrelationships in the physician-patient and patient-physician systems in the orthodontic clinic

The results of the studies of interrelation within the systems doctor-patient and patient-doctor are reported. A total of 249 orthopedists and 525 patients with removable dentures were interviewed. The data analysis revealed that there still exist unfavorable relations between doctors and patients elicited by an undue level of organization of the working unit and the lack in complexity in the patient's preparation to the procedure. Overcoming these drawbacks will be useful in improving patients-doctors relations and increasing in quality of medical assistance.