Mandibular Implant‐Retained Overdentures: Potential Accelerator of Bone Loss in the Anterior Maxilla?
Purpose To compare the residual ridge resorption (RRR) of the anterior maxillary bone beneath complete dentures when opposed by mandibular complete dentures (CD) and implant‐retained overdentures (IRO). Materials and Methods 18 patients were rehabilitated with maxillary CD opposing mandibular IRO, a...
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Published in | Journal of prosthodontics Vol. 28; no. 2; pp. 131 - 137 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
Wiley Subscription Services, Inc
01.02.2019
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Subjects | |
Online Access | Get full text |
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Summary: | Purpose
To compare the residual ridge resorption (RRR) of the anterior maxillary bone beneath complete dentures when opposed by mandibular complete dentures (CD) and implant‐retained overdentures (IRO).
Materials and Methods
18 patients were rehabilitated with maxillary CD opposing mandibular IRO, and 4 patients were prescribed with conventional CD. Cone beam computed tomography (CBCT) scans of the maxilla were acquired before and 1 year post‐treatment and converted into 3D models using Mimics research software. RRR was quantified by measuring the changes in bone volume following superimpositioning and sectioning of these models at the anterior maxillary region. Subsequently, the sectioned 3D models of the anterior maxilla were exported to 3‐Matic software to reveal the predominant region and depth of RRR.
Results
The mean reduction in bone volume of the anterior maxilla in the CD group was 2.60% (SD = 1.71%, range = −4.89 % to −0.92%, median = −2.30%), while the mean reduction in the IRO group was almost three times higher at 7.25% (SD = 3.16%, range = −13.25 to −1.50, median = −7.15%). The predominant areas of RRR were on the buccal and occlusal ridge of the anterior maxilla.
Conclusion
Within the limits of this study, it may be concluded that an IRO caused significantly higher RRR of the anterior maxilla than a CD. |
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Bibliography: | This study was funded by Universiti Teknologi Mara, Malaysia (UiTM) and Malaysia Higher Education Fundamental Research Grant Scheme (FRGS/1/2015/SKK14/UITM/02/2). The authors deny any conflicts of interest in regards to this study . ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1059-941X 1532-849X |
DOI: | 10.1111/jopr.12999 |