Elíasson S T, Haasken B
Oral Surg Oral Med Oral Pathol. 1979 May;47(5):485-91. doi: 10.1016/0030-4220(79)90136-1.
The radiographic densitites of twenty-six impression materials were measured and the values expressed as an equivalent thickness of aluminum. Under simulated clinical conditions, only ten of the materials tested could be consistently distinguished from the bone structure in periapical radiographs. It was far more dificult to detect objects with beveled margins than objects of uniform thickness. The minimum radiopacity of a material which could be detected in the periodontal tissue on a periapical radiograph was estimated.
测量了26种印模材料的X线密度，并将其值表示为铝的等效厚度。在模拟临床条件下，所测试的材料中只有10种在根尖片上能够始终与骨结构区分开来。检测边缘有斜角的物体比检测厚度均匀的物体要困难得多。估计了在根尖片上能在牙周组织中检测到的材料的最小射线不透性。
