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Journal of Dental Research
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Post Placement Affects Survival of Endodontically Treated Premolars

M. Ferrari*, M.C. Cagidiaco, S. Grandini, M. De Sanctis and C. Goracci

Dipt. Scienze Odontostomatologiche, Policlinico Le Scotte, Viale Bracci, University of Siena, Siena 53100, Italy


Figure 1
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  		Figure 1. Schematic representations of the various degrees of hard-tissue loss that the tested premolars might exhibit at completion of endodontic treatment. The darker area represents the missing structure in the conditions referred to as (A) 4 coronal walls retained (Group 1, N = 40), (B) 3 walls remaining (Group 2, N = 40), (C) 2 walls maintained (Group 3, N = 40), and (D) only 1 coronal wall preserved (Group 4, N = 40).

 

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  		Figure 2. Kaplan-Meier plots by subgroup (A) showed that the survival probability was higher for posted restorations from the six-month recall on. The gap between the two curves became greater as time progressed. Kaplan-Meier plots constructed for the groups defined as 4, 3, 2, and 1 preserved coronal wall (B–F, respectively, N at baseline = 40 in each group) indicated that the probability of tooth failure was higher in the presence of a reduced portion of crown dentin. Also, post placement appeared to contribute more to survival probability the less the coronal structure was retained, since the gap between the "post" and "no post" plots increased as the degree of hard-tissue loss increased.

 

Journal of Dental Research, Vol. 86, No. 8, 729-734 (2007)
DOI: 10.1177/154405910708600808
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