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Clinical Trial Summary

Background: The actual literature is consistent in considering potential negative effects of sub-gingival prosthetic margins on the periodontal health, but no research has focused the attention on the type of prosthetic margin designs. Hence, the aim of the present study is to evaluate if a horizontal finishing line (deep chamfer preparation) may have a different influence on periodontal soft tissue in comparison with a vertical finishing line (feather edge preparation).

Methods: A prospective randomized controlled double blind clinical trial with one single operator and three experienced examiners was performed. One hundred and six crowns were prepared with horizontal tooth preparation while ninety-four with vertical tooth preparation. All the margins were positioned within the periodontal sulcus, at 0.5mm sub-gingivally and all the all-ceramic restorations were cemented with resin cement. Periodontal Probing Depth (PPD), Plaque Index (PI), Gingival Index (GI) and Gingival Bleeding on Probing (BOP) were recorded prior to tooth preparation and twelve month after crown cementation. Also, at 12 months follow-up, the gingival margin position was related to the crown margin position.


Clinical Trial Description

n/a


Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator, Outcomes Assessor), Primary Purpose: Treatment


Related Conditions & MeSH terms


NCT number NCT02276586
Study type Interventional
Source University of Padova, School of Dental Medicine
Contact
Status Completed
Phase N/A
Start date January 2013
Completion date September 2014

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