Quantitative Evaluation for Palatopharyngeal Closure Level on Patients with Maxillary Prostheses and The Construction of Its Data Base

上颌骨缺损者可表现为口腔S主要功能的恶化，以及因其上颌骨缺陷所致的言语功能、咀嚼功能和吞咽功能的紊乱。为了克服这些功能损失和紊乱，通常从修复体的角度应用上颌修复体。然而，由于上颌骨缺损部的大小和义齿的放置路径，很难对丢失的部分进行足够的密封。虽然上颌骨假体可以提供令人满意的语音、咀嚼和吞咽功能的恢复，但空气和湿气渗漏到鼻子是其他问题。传统的方法，如判断发音水平、吹吸管(时间测量)、吹双簧管(长度)或在患者鼻子前的镜子或不锈钢管上检查雾化状态和形状，很难用来评价…的密封程度对于上颌修复体来说，更多的是定量和客观的上颌丢失部分。还介绍了一种用吸气法测量水柱的方法。这种方法需要处理复杂的设备。为了定量和客观地评价上颌骨假体安装时的腭咽闭合水平，我使用了差压换能器和呼吸放大器。对4例24~25岁健康男性和8例因上颌骨部分缺损导致的腭咽闭合不全患者进行了上颌骨假体安装前后口腔内压的测定。我使用这些口腔内部的测量数据进行分析和评估。在我们的评估中，我发现通过以下步骤可以定量和客观地评估腭咽闭合水平：1)在安装上颌骨假体之前，获得最大压力、口腔内稳定压力、稳定压力维持间隔和吹吸时的压力衰减时间作为标准值。2)安装上颌骨假体后测量与上述1)相同的项目，并比较上颌骨假体安装前后的数值。此外，使用多媒体个人计算机可以一次看到这些患者的各种数据的使用情况，如临床记录、口内摄影、X光片、语音记录和下颌运动。我们还发现，这种数据处理的便利性为本研究提供了相对容易的数据库建设。较少

Patients having maxillary defects may show deterioration of the mouth s major functions and disorders in the speech function, the masticatory function and the swallowing function due to their maxillary defect. In order to overcome these functional losses and disorders, maxillary prostheses are ordinarily applied from a prosthetic point of view. However, because of the size of the defect part in a maxilla and the path of placement of the denture, an enough seal for the lost part is difficult to secure. Though the maxillary prostheses might provide a satisfactory level of recovery concerning the speech, masticatory and swallowing functions, air and moisture leakage to the nose are other troubles. The conventional methods, such as judging the articulation level, blowing a straw (time measurement), blowing an oboe (length) or checking the fogging status and shape on a mirror or a stainless steel pipe in front of the patient's nose, are difficult to use to evaluate the sealing level of the … More lost part in a maxilla for a maxillary prosthesis quantitatively and objectively. A method to measure a water column by inhaling has also been introduced. This method requires the handling of complicated equipment.In order to quantitatively and objectively evaluate the palatopharyngeal closure level for installing a maxillary prosthesis, I used a differential-pressure transducer and an respiratory amplifier. The variation of the intraoral pressure while blowing and sucking before and after installing a maxillary prosthesis was measured on four healthy males aged 24 to 25 and eight patients with incomplete palatopharyngeal closure caused by a partial defect of their maxilla. I used these measured data of the mouth's inside for analysis and evaluation. For our evaluation, I found that quantitative and an objective evaluation of the palatopharyngeal closure level was possible by the following procedures : 1) Obtain the maximum pressure, the stable pressure inside the mouth, as well as the stable pressure maintenance interval and the pressure attenuation time while blowing and sucking before installing a maxillary prosthesis for standard values. 2) Measure the same items as item 1) above after installing the maxillary prosthesis, and compared these values of before and after installing the maxillary prosthesis.In addition, the use of the various data concerning these patients, such as clinical records, intraoral photography, X-ray pictures, voice recordings and mandibular movement, can all be seen at once by using a multi-media personal computer. We also found that this data handling convenience offers relatively easy construction of data bases for this research. Less