Pathogenetic analysis and treatment of bone resorption after chin augmentation with prostheses
10.3760/cma.j.issn.1671-0290.2014.01.006
- VernacularTitle:假体隆颏术后骨吸收的原因分析及治疗
- Author:
Xiaojun TANG
;
Zhiyong ZHANG
;
Lei SHI
;
Lin YIN
;
Wei LIU
- Publication Type:Journal Article
- Keywords:
Prostheses;
Chin augmentation;
Bone resorption;
Microgenia;
Silicone materials;
High-density porous polyethylene (Medpor)
- From:
Chinese Journal of Medical Aesthetics and Cosmetology
2014;20(1):22-25
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze and discuss the possible reasons of the bone resorption beneath the prostheses after chin augmentation.Methods Twelve patients were admitted to our department for further correction after chin augmentation with materials.The bone resorption was observed through the clinical research and X-ray examination.Results All the patients were underwent the removal of the materials,genioplasty was performed in 8 patients,and two patients were treated by chin augmentation with polyethylene.All the patients were satisfied with their facial contouring.Mild bone resorption was found in seven patients (depth of bone resorption ≤2 mm),in which five patients were used with silicone materials,two patients were performed with expanded polytetrafluoroethylene implants.Moderate bone resorption was seen in three cases.All of them were used with silicone implants (2 mm ＜ depth of bone resorption ≤4 mm).Severe bone resorption happened in two patients (depth of bone resorption ＞4 mm).One was used with silicone implant,and the other one was carried out with expanded polytetrafluoroethylene implant.Conclusions The imbalance among mentalis muscle,materials and underlying bone might be one of the key reasons.Thus for mild and moderate microgenia cases,chin augmentation with material is suitable,while long-term fellow-up study is necessary.But for the cases of severe mirogenia or microgenia and micrognathia with dentofacial deformity or mentalis muscle hyperactivity,genioplasty might be performed as well to correct their deformities.
