Beech D R, Hardwick J L
J Oral Rehabil. 1978 Jan;5(1):69-80. doi: 10.1111/j.1365-2842.1978.tb00393.x.
The tensile bond strengths of composites to enamel etched with various concentrations of phosphoric acid have been shown to correlate closely with the phase diagram for the system Ca(OH)2/H3PO4/H2O. Bond strengths were independent of the adhesive used and were a maximum when using approximately 20% phosphoric acid as etchant. High bond strengths were obtained with 2% phosphoric acid etchant without 'tag' formation, after short term water immersion. Washing the enamel for 60 s instead of 15 s after etching significantly increased the bond strengths obtained with 16 and 30% acid but not with 2%. Etching enamel with phosphoric acid results in deposition of calcium phosphates, which must be removed to give optimal bonding.
已表明，复合材料与用不同浓度磷酸蚀刻的牙釉质之间的拉伸粘结强度与Ca(OH)₂/H₃PO₄/H₂O体系的相图密切相关。粘结强度与所使用的粘合剂无关，当使用约20%的磷酸作为蚀刻剂时粘结强度最大。在短期水浸后，使用2%的磷酸蚀刻剂可获得高粘结强度且无“标签”形成。蚀刻后将牙釉质冲洗60秒而非15秒，可显著提高用16%和30%的酸获得的粘结强度，但用2%的酸时则不然。用磷酸蚀刻牙釉质会导致磷酸钙沉积，必须将其去除才能实现最佳粘结。
