A comparison was made of the dentinal crazing formation and pull-out strength of conventional retention pins and modified machinist's taps. Modified machinist's taps produced less dentinal crazing in wet, fresh, and dried dentin than the conventional retention pins. Modified taps have sufficient pull-out strength to retain restorations on teeth with fresh dentin, in clinical situations.
Get full access to this article
View all access options for this article.
References
1.
Markley, M.R. : Pin-Retained and Pin-Reinforced Amalgam, JADA73: 1295-1300, 1966.
2.
Dilts, W.W.; Welk,D.A. ; Laswell, H.R.; and George, L.: Crazing of Tooth Structure Associated with Placement of Pins for Amalgam Restorations , JADA81 :387-391, 1970.
3.
Collard, E.W. ; Caputo, A.A.; and Standlee , J.P.: Rationale for Pin-Retained Amalgam Restorations, in Dental Clinics of North America, Philadelphia: W. B. Saunders Co., 14: 43-51, 1970.
4.
Caputo, A.A. ; Standlee, J.P.; and Collard, E.W.: The Mechanics of Load Transfer by Retentive Pins, J Prosthet Dent29: 442-449, 1973.
5.
Johnston, J.F. ; Phillips, R.W.; and Dykema, R.W.: Modern Practice in Crown and Bridge Prosthodontics , 2nd ed, Philadelphia: W.B. Saunders Co., 1965, p 533.
6.
Chan, K.C., and Svare, S.W.: Comparison of the Dentinal Crazing Ability of Retention Pins and Machinist's Taps, J Dent Res52: 178, 1973.
