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Factors Influencing Bone Resorption after Augmentation Mentoplasty with Implants: A Retrospective Study Using
Jie Cao1, Jun Zhuang2, Cheng Wang3
1Radiology Department, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China.
Aesthetic Plastic Surgery
|September 13, 2024
Summary
Chin augmentation with implants can lead to bone resorption. Thicker mentalis muscles and thinner cortical bone increase risk. Silicone implants and higher placement may reduce resorption.
Area of Science:
- Oral and Maxillofacial Surgery
- Plastic Surgery
- Biomaterials Science
Background:
- Augmentation mentoplasty using implants is a common cosmetic procedure.
- Bone resorption is a frequent complication following chin augmentation surgery.
- Factors influencing this bone resorption have not been thoroughly investigated.
Purpose of the Study:
- To identify and evaluate key factors contributing to bone resorption after augmentation mentoplasty.
- To analyze the impact of implant material, placement, and patient-specific anatomy on bone resorption.
- To provide data for optimizing surgical techniques and reducing complications.
Main Methods:
- Retrospective analysis of craniofacial Computed Tomography (CT) scans from 105 patients who received mandibular implants and 108 controls.
- Evaluation of implant type (silicone vs. Medpor), placement position (above/below mandibular bone), mentalis muscle thickness, and cortical bone thickness.
- Statistical analysis to determine the influence of these factors on bone resorption.
Main Results:
- Silicone gel implants were associated with a higher incidence of bone resorption compared to Medpor implants.
- Patients experiencing bone resorption exhibited significantly thicker mentalis muscles (6.35 ± 1 mm vs. 5.73 ± 1.25 mm) and thinner cortical bone (3.25 ± 1.65 mm vs. 5.22 ± 2.04 mm).
- Implants positioned superior to the mandibular bone increased the likelihood of bone resorption.
Conclusions:
- This study systematically identifies implant type, placement, mentalis muscle thickness, and cortical bone thickness as critical factors in post-mentoplasty bone resorption.
- Patients with thicker mentalis muscles and thinner cortical bone require careful monitoring for bone resorption.
- Strategic choices, such as using Medpor implants and optimizing implant placement, can mitigate the risk of bone resorption, aiding clinical decision-making.
