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UCIrvineDEPARTMENT OFBIOMEDICAL ENGINEERING
IWK 2007
Virtual Bone Density Measurementfor Dental Implants
Virtual Bone Density MeasurementVirtual Bone Density Measurementfor Dental Implantsfor Dental Implants
Joerg [email protected]
Henry Samueli School of EngineeringUniversity of California at Irvine
September 26, 2007
Joerg MeyerJoerg [email protected]@uci.edu
Henry Henry SamueliSamueli School of EngineeringSchool of Engineering
University of California at IrvineUniversity of California at IrvineSeptember 26, 2007September 26, 2007
UCIrvineVirtual Bone Density Measurement for Dental Implants
Joerg Meyer - [email protected]
DEPARTMENT OFBIOMEDICAL ENGINEERING
Virtual Bone DensityVirtual Bone DensityVirtual Bone Density
• Measuring Osseointegration of Dental Implants
•• Measuring Osseointegration of Measuring Osseointegration of Dental ImplantsDental Implants
UCIrvineVirtual Bone Density Measurement for Dental Implants
Joerg Meyer - [email protected]
DEPARTMENT OFBIOMEDICAL ENGINEERING
PeriometerPeriometerPeriometer
Handheld ProbeHandheld ProbeHandheld Probe
PC Equipped withHigh Speed A/D Card & Instrumentation Software
Signal Conditioning Electronics and Power
Supply
Signal Conditioning Electronics and Power
Supply
Ener
gy R
etur
nEn
ergy
Ret
urn
TimeTime
periometerηη
σσ
CompressionCompressionCompression
TensionTensionTension
Drive CoilDrive CoilDrive CoilPercussion RodPercussion RodPercussion RodAccelerometerAccelerometerAccelerometer
UCIrvineVirtual Bone Density Measurement for Dental Implants
Joerg Meyer - [email protected]
DEPARTMENT OFBIOMEDICAL ENGINEERING
Percussion TestPercussion TestPercussion Test
• Clinically relevant mechanical testing–Loss coefficient of energy (LC)–Energy return profile
•• Clinically relevant mechanical testingClinically relevant mechanical testing–– Loss coefficient of energy (LC)Loss coefficient of energy (LC)–– Energy return profileEnergy return profile
UCIrvineVirtual Bone Density Measurement for Dental Implants
Joerg Meyer - [email protected]
DEPARTMENT OFBIOMEDICAL ENGINEERING
Virtual Bone DensityVirtual Bone DensityVirtual Bone Density
• Measuring Osseointegration of Dental Implants
•• Measuring Osseointegration of Measuring Osseointegration of Dental ImplantsDental Implants
UCIrvineVirtual Bone Density Measurement for Dental Implants
Joerg Meyer - [email protected]
DEPARTMENT OFBIOMEDICAL ENGINEERING
Virtual Bone DensityVirtual Bone DensityVirtual Bone Density
• Measuring Osseointegration of Dental Implants
•• Measuring Osseointegration of Measuring Osseointegration of Dental ImplantsDental Implants
UCIrvineVirtual Bone Density Measurement for Dental Implants
Joerg Meyer - [email protected]
DEPARTMENT OFBIOMEDICAL ENGINEERING
Virtual Bone DensityVirtual Bone DensityVirtual Bone Density
• Measuring Osseointegration of Dental Implants
•• Measuring Osseointegration of Measuring Osseointegration of Dental ImplantsDental Implants
Site 10
Site 12
UCIrvineVirtual Bone Density Measurement for Dental Implants
Joerg Meyer - [email protected]
DEPARTMENT OFBIOMEDICAL ENGINEERING
Implant SitesImplant SitesImplant Sites
• Computed Cross-sections•• Computed CrossComputed Cross--sectionssections
Site 10 Site 12Site 10 Site 10 Site 12Site 12
UCIrvineVirtual Bone Density Measurement for Dental Implants
Joerg Meyer - [email protected]
DEPARTMENT OFBIOMEDICAL ENGINEERING
Implant SitesImplant SitesImplant Sites
• Density Profiles(lingual and buccal side)
•• Density ProfilesDensity Profiles(lingual and buccal side)(lingual and buccal side)
Site 10 Site 12Site 10 Site 10 Site 12Site 12
UCIrvineVirtual Bone Density Measurement for Dental Implants
Joerg Meyer - [email protected]
DEPARTMENT OFBIOMEDICAL ENGINEERING
Implant SitesImplant SitesImplant Sites
• Density Profiles(lingual and buccal side)
•• Density ProfilesDensity Profiles(lingual and buccal side)(lingual and buccal side)
Site 10 Site 12Site 10 Site 10 Site 12Site 12
UCIrvineVirtual Bone Density Measurement for Dental Implants
Joerg Meyer - [email protected]
DEPARTMENT OFBIOMEDICAL ENGINEERING
ResultsResultsResults
• Observations:•–Density profiles similar (initial rise, peak
plateau, fall with increasing distance from apex)
–Deviations from this trend(confirmed by mechanical testing)
–Lingual side bone mass higher(greater loss)
• Observations:Observations:–– Density profiles similar (initial rise, peak Density profiles similar (initial rise, peak
plateau, fall with increasing distance plateau, fall with increasing distance from apex)from apex)
–– Deviations from this trendDeviations from this trend(confirmed by mechanical testing)(confirmed by mechanical testing)
–– Lingual side bone mass higherLingual side bone mass higher(greater loss)(greater loss)
MissingplateauMissingMissingplateauplateau
Site 10 Site 12Site 10 Site 10 Site 12Site 12
UCIrvineVirtual Bone Density Measurement for Dental Implants
Joerg Meyer - [email protected]
DEPARTMENT OFBIOMEDICAL ENGINEERING
SummarySummarySummary
• CT scan of maxilla(cadaver study)
• Computed cross-sections• Density profiles along lingual and
buccal side of implant• Superimpose profile on virtual
cross-sections• Good correlation with mechanical
testing
•• CT scan of maxillaCT scan of maxilla(cadaver study)(cadaver study)
•• Computed crossComputed cross--sectionssections•• Density profiles along lingual and Density profiles along lingual and
buccal side of implantbuccal side of implant•• Superimpose profile on virtual Superimpose profile on virtual
crosscross--sectionssections•• Good correlation with mechanical Good correlation with mechanical
testingtesting
UCIrvineVirtual Bone Density Measurement for Dental Implants
Joerg Meyer - [email protected]
DEPARTMENT OFBIOMEDICAL ENGINEERING
Questions?QuestionsQuestions??
Joerg MeyerUniversity of California, IrvineEECS/BME Department644E Engineering TowerIrvine, CA 92697-2625
[email protected]://imaging.eng.uci.edu/~jmeyer