Mostafa Aisha Zakaria Hashem, Alanazi Sarab Muzil, Almarshedy Samaher Mohammad
Prosthodontics Department Collage of Dentistry Mansoura University Mansoura Egypt.
Faculty of dentistry Ha'il University Ha'il Saudi Arabia.
Clin Case Rep. 2022 Mar 17;10(3):e05593. doi: 10.1002/ccr3.5593. eCollection 2022 Mar.
The construction of a removable dental prosthesis for patients with compromised residual alveolar ridges is a challenge for prosthodontists. Flabby anterior ridges and hypermobile tissues in completely edentulous arches require special considerations during prosthetic management, especially when natural dentations remain on the opposite side. Previous studies have revealed that the displacement of flabby tissue can be reduced during impressions by controlling the applied forces via changes in factors such as the tray design, scraping of impression trays, impression material, window technique, and seating velocity of the impressions. However, there may still be some forces applied during impression or there is no even space because there are no trays supporting the vinyl polysiloxane (VPS) impression material in the open window area. Using a custom double tray with even gap between these trays and injecting light body impression material may eliminate these forces and provide accuracy due to even space for the impression material. This article is a clinical report of a patient who presented with an anterior flabby maxillary edentulous ridge opposing the remaining anterior natural teeth. A custom double tray was fabricated using the principle of the window technique. The gap between the double trays allows mucostatic impressions of flabby ridge tissue to be made with accuracy. The maxillary single denture, which was made with a custom double tray, satisfied the patient.
为残余牙槽嵴受损的患者制作可摘局部义齿对口腔修复医生来说是一项挑战。在全口无牙弓中，松弛的前牙嵴和活动度较大的组织在修复治疗过程中需要特别考虑，尤其是当对侧仍保留天然牙列时。以往的研究表明，在印模过程中，通过改变托盘设计、托盘刮除、印模材料、开窗技术和印模就位速度等因素来控制施加的力，可以减少松弛组织的移位。然而，在印模过程中可能仍会有一些力的作用，或者由于在开窗区域没有托盘支撑乙烯基聚硅氧烷（VPS）印模材料而没有均匀的空间。使用定制的双托盘，在这些托盘之间有均匀的间隙，并注入轻体印模材料，可以消除这些力，并由于印模材料有均匀的空间而提供准确性。本文是一份临床报告，讲述了一位患者，其上颌前牙区无牙嵴松弛，与剩余的前牙天然牙相对。利用开窗技术的原理制作了定制的双托盘。双托盘之间的间隙允许准确地制作松弛嵴组织的黏膜静止印模。用定制双托盘制作的上颌单颗义齿使患者满意。
