Division of Dysphagia Rehabilitation, Niigata University Graduate School of Medical and Dental Sciences, Japan.
J Prosthodont Res. 2013 Oct;57(4):294-7. doi: 10.1016/j.jpor.2013.08.003. Epub 2013 Oct 2.
Although a closed hollow obturator is often applied to post maxillectomy patients, it has a few problems such as complexity of fabrication and water leakage to inside. A one step curing technique to fabricate a closed hollow obturator by constructing a small hollow bulb made by two thermoplastic resin sheets is described in the present report.
In the one step curing technique, after dewaxing the wax denture fabricated conventionally, one size smaller hollow body was fabricated with two thermoplastic resin sheets and set into the investment mold as a core. Then the circumferential part of obturator was cured by the pour type resin. This technique was used to fabricate an obturator prosthesis in a 60-year-old post-maxillectomy patient. The weight of this obturator was well controlled and the definitive prosthesis weighed 22 g. At a one year follow-up, the obturator fared well without any water leakage or breakage.
This technique allows the fabricator to control the thickness and weight of the obturator by the amount of relief provided by the hollow bulb. It also rectifies the disadvantages of the closed hollow obturator such as water leakage and complexity of fabrication.
尽管闭孔阻塞器常用于上颌骨切除术后的患者，但它存在一些问题，如制造复杂和内部漏水。本文介绍了一种通过构建由两张热塑性树脂片制成的小空心球来制造闭孔阻塞器的一步固化技术。
在一步固化技术中，在上颌骨切除术后患者的蜡义齿常规去蜡后，用两张热塑性树脂片制造一个小一号的空心体，并将其作为核心放入包埋模具中。然后，通过浇铸型树脂固化阻塞器的周边部分。该技术用于制作一名 60 岁上颌骨切除术后患者的阻塞器义齿。该阻塞器的重量得到了很好的控制，最终义齿的重量为 22 克。在一年的随访中，阻塞器使用情况良好，没有任何漏水或破裂的情况。
该技术允许制造商通过空心球提供的补偿量来控制阻塞器的厚度和重量。它还纠正了闭孔阻塞器的缺点，如漏水和制造复杂。
