Long T D, Smith B G
Department of Conservative Dental Surgery, United Medical School, Guy's Hospital, University of London, U.K.
J Oral Rehabil. 1988 Nov;15(6):593-8. doi: 10.1111/j.1365-2842.1988.tb00196.x.
Measurements of the contact and embrasure areas of adjacent extracted teeth set in plaster blocks were made before groups of dentists undertook preparations on them. The prepared and adjacent teeth were examined and the findings related back to these measurements. Damage to the adjacent teeth was a common finding with both mesial-occlusal-distal (MOD) and complete crown preparations. There was some evidence that easier access to the contact area reduced the frequency of damage to teeth adjacent to MOD preparations. The taper of complete crown preparations did not conform to commonly recommended designs. This investigation highlights the need for greater consideration of approximal tooth surfaces when undertaking preparations and questions the practicality of achieving traditional features of complete crown preparation design. In teaching, greater emphasis should be placed on clinical reality rather than on theoretical, but unachievable ideals.
在几组牙医对石膏模型中相邻的拔除牙齿进行预备之前，先对其接触区和楔状隙面积进行了测量。对预备后的牙齿和相邻牙齿进行了检查，并将检查结果与这些测量数据相关联。近中-咬合-远中（MOD）修复和全冠修复时，相邻牙齿受损是常见现象。有证据表明，更易于接触接触区可降低MOD修复相邻牙齿的损伤频率。全冠修复的锥度不符合通常推荐的设计。这项研究强调了在进行修复时需要更多地考虑邻面牙齿表面，并对实现全冠修复设计的传统特征的实用性提出了质疑。在教学中，应更加强调临床实际情况，而非理论上但无法实现的理想情况。
