prosthetic screw fractures in a case with zygoma implants
DESCRIPTION
a case report with recurrent fractures of the prosthetic screws, due to inadequate design of the prosthetic barTRANSCRIPT
![Page 1: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/1.jpg)
Recurrent fractures of prosthetic
screws with zygoma implants
Prosthetic screw No screw broken screw
![Page 2: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/2.jpg)
Situation
• Patient desires: – improved retention of prosthesis in the upper jaw
• Diagnosis:– Ill fitting prosthesis in upper jaw
– Severe atrophy in UJ (Div D, Misch)
• Treatment plan:– Quad zygoma, delayed loading, overdenture
![Page 3: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/3.jpg)
Chronology
• 30/06/2009: Implant placement quad zygoma
• 04/01/2010: second stage
• Prosthetic treatment not in our department
• 09/09/2010: final control
• 05/05/2011: emergency consultation ¾
prosthetic screws were broken
![Page 4: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/4.jpg)
Intake
31/03/2009
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31/03/2009: Intake
![Page 6: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/6.jpg)
31/03/2009: Intake
![Page 7: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/7.jpg)
31/03/2009: Intake
![Page 8: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/8.jpg)
31/03/2009: Intake
![Page 9: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/9.jpg)
31/03/2009: Intake
![Page 10: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/10.jpg)
Implantplanning
![Page 11: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/11.jpg)
Analytical Bone Table
![Page 12: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/12.jpg)
26/04/2009: Implant planning
Implant planning according
to the Stella Technique
![Page 13: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/13.jpg)
Treatment
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30/06/2009: Postoperative
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30/06/2009: Postoperative
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04/01/2010: second stage
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04/01/2010: second stage
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04/01/2010: second stage
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Endresult
09/09/2010
![Page 20: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/20.jpg)
09/09/2010: end result
![Page 21: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/21.jpg)
09/09/2010: end result
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09/09/2010: end result
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09/09/2010: end result
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09/09/2010: end result
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09/09/2010: end result
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09/09/2010: end result
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09/09/2010: end result
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09/09/2010: end result
![Page 29: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/29.jpg)
09/09/2010: end result
![Page 30: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/30.jpg)
09/09/2010: end result
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09/09/2010: end result
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Follow-up > 1 j
05/05/2011
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Emergency consultation
• 06/06/2011
– Problem:
• Bar loosens frequently and repetitive fractures of
the prothetic screws
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05/05/2011: Quad zygoma and repetitive fractures of the prosthetic screws
![Page 35: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/35.jpg)
Prosthetic screw No screw broken screw
05/05/2011: Quad zygoma and repetitive fractures of the prosthetic screws
![Page 36: Prosthetic screw fractures in a case with zygoma implants](https://reader031.vdocuments.us/reader031/viewer/2022020209/568bf1611a28ab893392f1e7/html5/thumbnails/36.jpg)
What are the causes?
What would you do ?