ORAL HEALTH EVIDENCE-BASED PRACTICE PROGRAM
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Title CAD/CAM Fabricated FPDs Have Higher Fracture Strength Than Directly Fabricated FPDs
Clinical Question In a 60 year-old adult requiring a fixed partial denture, is fracture toughness of CAD/CAM fabricated temporary FPD higher than a directly fabricated FPD restoration?
Clinical Bottom Line CAD/CAM fabricated temporary FPDs have higher fracture strength than directly fabricated temporary FPDs when manufactured of the same material.
Best Evidence (you may view more info by clicking on the PubMed ID link)
PubMed ID Author / Year Patient Group Study type
(level of evidence)
#1) 21176946Alt/201010 FPDs per experimental groupSystematic Review
Key results“Maximum force at fracture (Fmax) in a 3 point bending test at 200mm/min value ranged from 138.5 to 1115.5N. FPDs that were CAD/CAM fabricated, showed a significant higher Fmax compared to directly fabricated bridges (p<0.05). TC significantly affected Fmax for Luxatemp (p < 0.05) but not for the PMMA based materials (p > 0.05). CAD/CAM milled FPDs made of Luxatemp showed significantly higher Fmax values compared to Trim and Cercon Base PMMA (p < 0.05).”
Evidence Search "Denture, Partial, Temporary"[Mesh] AND "Stress, Mechanical"[MesH]
Comments on
The Evidence
This is a systemic review with no comprehensive or detailed study done. No Meta-analysis is done either. Ten different trials were done.
Applicability The subjects are representative of general dentistry patients. Treatment is feasible but it is very time consuming and more expensive than directly fabricated temporary FPDs. Even so, because of the toughness of CAD/CAM fabricated temporary FPDs, it will be less likely that patients will have provisional fractures.
Specialty/Discipline (General Dentistry) (Prosthodontics) (Restorative Dentistry)
Keywords CAD/CAM, temporary, FPDs, fracture strength, directly fabricated
ID# 2462
Date of submission: 03/07/2013spacer
E-mail bhagat@livemail.uthscsa.edu
Author Keyur Bhagat
Co-author(s)
Co-author(s) e-mail
Faculty mentor/Co-author Niraj Patel, DDS
Faculty mentor/Co-author e-mail patelnk@livemail.uthscsa.edu
Basic Science Rationale
(Mechanisms that may account for and/or explain the clinical question, i.e. is the answer to the clinical question consistent with basic biological, physical and/or behavioral science principles, laws and research?)
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None available
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Comments on the CAT
(FOR PRACTICING DENTISTS' and/or FACULTY COMMENTS ON PUBLISHED CATs)
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