THE ROLE OF ALTERED CAST IMPRESSION TECHNIQUE IN ACHIEVING ACCURATE PROSTHETIC FIT: A CASE REPORT

In dental practice, posterior bilateral edentulous spaces are most commonly encountered situations. Removable prosthesis generally is tooth or tissue borne or in combination. But the distal extension cases obtain their support from both the teeth and tissue adjacent to ensure equal distribution of forces on the teeth and the soft tissue. In this case report altered cast technique for fabrication of removable partial dentures has been described in detail. It is best alternative for impression making especially in distal extension cases for its better tissue adaptability, better support, uniform stress distribution, and stability of the prosthesis. Thus, increases patient comfort and function.

在牙科临床中，双侧后牙缺牙间隙是最为常见的接诊病例类型。可摘义齿（removable prosthesis）通常分为牙支持式、组织支持式或二者联合支持式。但远中游离缺失病例需同时依托邻牙与邻近软组织获得支持，以确保咬合力在天然牙与软组织上均匀分布。

本病例报告详细阐述了用于制作可摘局部义齿（removable partial dentures）的改良模型技术（altered cast technique）。该技术因具备更优的软组织适配性、更可靠的支持效果、均匀的应力分布以及义齿稳定性，是取印模的优选方案，尤其适用于远中游离缺失病例，进而提升患者的佩戴舒适度与咀嚼功能。