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document
Influence of bony defects on implant stability . INTRODUCTION The purpose of this study was to analyze the evolution of implant mechanical stability in different types/sizes of bony defects using both Periotest and Osstell devices as " objective tools . " MATERIALS AND METHODS Thirty-two implants were randomly allocated to one of the four types of bone defects : marginal bone loss , peri-apical bone defect , constant width dehiscence and constant length dehiscences . Periotest/Osstell measurements were completed before and during staged bone removal ( to enlarge defect size ) . RESULTS Significant differences ( P < 0.05 ) with initial values were found after a 2 mm marginal bone removal ( Osstell/Periotest ) ; for a peri-apical bone lesion , after removal of 5 mm ( Osstell ) or 8 mm ( Periotest ) ; for a 6-mm-long dehiscence , after removal up to 180 degrees of the implant perimeter ( Osstell/Periotest ) ; for a 3-mm-wide dehiscence , after removal of 10 mm ( Osstell ) or 6 mm ( Periotest ) . CONCLUSION Periotest and Osstell are in general not very sensitive in the identification of peri-implant bone destruction , except for marginal bone loss .
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Intervention_Physical
Periotest
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Intervention_Physical
Osstell
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Intervention_Physical
Osstell
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Intervention_Physical
Periotest
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Intervention_Physical
Periotest
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Intervention_Physical
Osstell
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Outcome_Physical
Periotest/Osstell measurements
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Outcome_Physical
peri-apical bone lesion
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Outcome_Physical
Periotest
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Outcome_Physical
Osstell
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Participant_Condition
bony defects
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Participant_Condition
bony defects
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Participant_Sample-size
Thirty-two
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Participant_Condition
bone defects
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Participant_Condition
marginal bone loss
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Participant_Condition
peri-apical bone defect
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Participant_Condition
constant width dehiscence
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Participant_Condition
constant length dehiscences