TITLE: Custom intraosseous implant with built-in dental prosthetic parts using 3D printing techniques for patients with oral defects survived from oral cancers - a 3D finite element study
AUTHORS (LAST NAME, FIRST NAME): Fuh, Lih-Jyh; Shen, Yen-Wen
Introduction: According to National Health Department based Cancer Registry Data (excluding carcinoma in situ) and
Cause of Death Statistics, Ministry of Health and Welfare, in 2012 the standard cancer incidence in the oral,
oropharynx and hypopharynx region was 22.3 per 100,000 people in Taiwan. And, oral cancer survivors usually
suffered difficulties for chewing, swallowing and speech leading to poor quality of life due to varying degrees of
sequelae by treatments. The most frustrated situation for both dentists and patients in the rehabilitation phase was to
deal with the sequelae after cancer treatments in the oral and related region, including redundant tissue of grafted flap or tight fibrous scar tissue, restricted movement of tongue, limited mouth opening, high risk of osteoradionecrosis, reduced saliva and defects for teeth, bone or keratinized tissue etc. If we can integrate proofed intraosseous implant technique and removable dentures fabricated with satisfied esthetics, patients would be function well due to providing good stability and withstand occlusal loading.
Method: A 3D finite element analysis (Ansys workbench 10.0) simulated for the patients with oral defects of mandible
from dental Cone beam computed tomography after operation in China Medical College Medical Center, Taiwan. We
designed two types custom intraosseous implant with six patterns occlusal loading. Element Type was SOLID185,
SOLID187 Tetrahedron and Element Size was alveolar bone 0.8 mm, 2.0 mm custom intraosseous implant.
Results: The results showed the custom intraosseous implant with fixation on both buccal and lingual cortical bone had lower maximumdisplacement and stress. Loading on the buccal side of defect had lower maximumdisplacement and stress.
The results of this FEA study is to provide personalized titanium alloy based reconstruction framework with denture
bearing abutment access using 3D printing technology based on the occlusion design for oral cancer patients before
cancer surgery .This project aims to provide conformity and continuity of the jaw bones to improve the quality of life
and promotes merits of clinical services by reducing complexity and suffering of multiple grafting surgeries for survived