4Schilling ER,Miller BH,Woody RD,et al.Marginal gap of crowns made with a phosphate-bonded investment and accelerated casting method[J].J Prosthet Dent,1999,81 (2):129-134.
5Chan DC,Blackman R,Kaiser DA,et al.The effect of sprue design on the marginal accuracy of titanium castings[J].J Oral Rehabil,1998,25 (6):424-429.
6Holmes JR,Bayne SC,Holland GA,et al.Considerations in measurement of marginal fit[J].J Prosthet Dent,1989,62(4):405-408.
7Grajower R,Lewinstein I.Effect of manipulative variables on the accuracy of crown wax patterns[J].J Prosthet Dent,1985,53(2):168-172.
8Campagni WV,Reisbick MH,Jugan M.A comparison of an accelerated technique for casting post-and-core restorations with conventional techniques[J].J Prosthodont,1993,2(3):159-166.
