7El-Badrawy WA, Leung BW, El-Mowafy O, et al. Evaluation of proximal contacts of posterior composite restorations with 4 placement techniques[J]. J Can Dent Assoc, 2003, 69(3):162-167.
8Newell DH, John V, Kim SJ. A technique of occlusal adjustment for food impaction in the presence of tight proximal contacts[J]. Oper Dent, 2002, 27 (1): 95-100.
9Hirschfeld I. Food impaction[J]. J Am Dent Assoc, 1930, 17: 1504.
10Wright EF. Elimination of a food impaetion problem in the posterior maxillary region[J]. J Prosthet Dent, 1993, 69(5):540- 541.