Lund T
Hennepin County Medical Center, Minneapolis, Minn, USA.
J Prosthet Dent. 1996 Sep;76(3):297-301. doi: 10.1016/s0022-3913(96)90175-4.
Dental stone molds are convenient for fabricating facial prostheses, but they tend to break when repeatedly used to make duplicate prostheses. This study investigated the use of an inexpensive plastic mesh, die hardener, and PVC pipe segment to reinforce stone mold test samples that were broken in compression on an Instron testing machine. The samples reinforced with PVC pipe surpassed the load limit of the Instron machine. The samples reinforced with both die hardener and mesh were 13% more resistant to breakage than the control samples made of stone alone. Samples reinforced only with mesh were 3% weaker than the control samples.
牙科石膏模型便于制作面部假体，但在反复用于制作复制品时容易破裂。本研究调查了使用廉价的塑料网、模具硬化剂和PVC管段来加固在英斯特朗试验机上受压破碎的石膏模型测试样品。用PVC管加固的样品超过了英斯特朗试验机的负载极限。同时用模具硬化剂和网加固的样品比仅由石膏制成的对照样品抗破损能力强13%。仅用网加固的样品比对照样品弱3%。
