Detection of Caries around Restorations with The Canary System
Objective: Quantum Dental Technologies’s infrared photothermal radiometry and modulated luminescence (PTR-LUM)-based device, The Canary System (CS), aids dentists in the detection and monitoring of dental caries. The aim of this pilot study was to evaluate the ability of CS to detect natural decay around composite restorations compared to DIAGNOdent (DD).
Method: Five extracted human molars and premolars with a natural cavitated caries lesions were used. A dentist used a round bur in a slow speed handpiece to remove the carious tooth tissues from the cavity, leaving some decayed tissues on the floor and wall of the cavity. However, caries-free margin, 1 mm below the tooth surface, was created along the walls of the cavity to allow for bonding of the composite to caries-free tooth structure. Using the classic technique, teeth were restored with Alert® Condensable Composite with etching and bonding. Following restoration, 48 test sites at margin of restoration (MON), 0.5mm and 1mm away from the margins were scanned with CS and DD. Canary Number (CN), an algorithm calculation based upon the PTR-LUM readings from the tooth surface, readings from CS and DD peak values were recorded.
Result: Mean±sd CN readings at MON and sites 0.5mm and 1mm away from the MON were 56±11, 31.6±5 and 19.1±3 respectively; indicating detection of decay at MON and 0.5 mm away from MON. Mean±sd DD peak values at MON and sites 0.5mm and 1mm away from the MON were 15±12, 8±9 and 4±4, respectively; indicating detection of decay only at the MON.
Conclusion: This study suggests that the Canary System has the potential to detect secondary caries around composite restorations more accurately than DIAGNOdent. Further research using a larger sample size currently in progress.
Division: IADR/LAR General Session
Meeting:2012 IADR/LAR General Session (Iguaçu Falls, Brazil) Location: Iguaçu Falls, Brazil
Year: 2012 Final Presentation ID:1824 Abstract Category|Abstract Category(s):Cariology Research - Detection, Risk Assessment and Others
Authors
Abrams, Stephen
( Quantum Dental Technologies, Toronto, ON, Canada
)
Hellen, Adam
( Quantum Dental Technologies, Toronto, ON, Canada
)
Silvertown, Josh
( Quantum Dental Technologies, Toronto, ON, Canada
)
Wong, Bonny
( Quantum Dental Technologies, Toronto, ON, Canada
)
Sivagurunathan, Koneswaran S.
( Quantum Dental Technologies, Toronto, ON, Canada
)
Jeon, Raymond J.
( Quantum Dental Technologies, Toronto, ON, Canada
)
Mandelis, Andreas
( University of Toronto, Center for Advanced Diffusion-Wave Technologies, Toronto, ON, Canada
)
Hellen, Warren
( Cliffcrest Dental Office, Scarborough, ON, Canada
)
Elman, Gary
( Cliffcrest Dental Office, Scarborough, ON, Canada
)
Amaechi, Bennett
( University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
)