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Kawamata S, Kawai T, Yasuge E, Hoshi I, Minamino T, Kurosu S, Yamada H. Investigation of the Mechanical Strength of Artificial Metallic Mandibles with Lattice Structure for Mandibular Reconstruction. MATERIALS (BASEL, SWITZERLAND) 2024; 17:3557. [PMID: 39063849 PMCID: PMC11278567 DOI: 10.3390/ma17143557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2024] [Revised: 07/14/2024] [Accepted: 07/16/2024] [Indexed: 07/28/2024]
Abstract
Mandibular reconstructive surgery is necessary for large bone defects. Although various reconstruction methods have been performed clinically, there is no mandibular reconstruction method that meets both sufficient strength criteria and the patient's specific morphology. In this study, the material strength of the cylindrical lattice structures formed by electron-beam melting additive manufacturing using titanium alloy powder was investigated for mandibular reconstruction. The virtual strengths of 28 lattice structures were compared using numerical material tests with finite element method software. Subsequently, to compare the material properties of the selected structures from the preliminary tests, compression test, static bending test and fatigue test were conducted. The results showed that there were correlations with relative density and significant differences among the various structures when comparing internal stress with deformation, although there was a possibility of localized stress concentration and non-uniform stress distribution based on the lattice structure characteristics. These results suggest that the lattice structure of body diagonals with nodes and a cell size of 3.0 mm is a potential candidate for metallic artificial mandibles in mandibular reconstruction surgery.
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Affiliation(s)
- Shinsuke Kawamata
- Division of Oral and Maxillofacial Surgery, School of Dentistry, Iwate Medical University, 19-1, Uchimaru, Morioka 020-8505, Iwate, Japan; (S.K.); (E.Y.); (I.H.); (H.Y.)
| | - Tadashi Kawai
- Division of Oral and Maxillofacial Surgery, School of Dentistry, Iwate Medical University, 19-1, Uchimaru, Morioka 020-8505, Iwate, Japan; (S.K.); (E.Y.); (I.H.); (H.Y.)
| | - Erika Yasuge
- Division of Oral and Maxillofacial Surgery, School of Dentistry, Iwate Medical University, 19-1, Uchimaru, Morioka 020-8505, Iwate, Japan; (S.K.); (E.Y.); (I.H.); (H.Y.)
| | - Isao Hoshi
- Division of Oral and Maxillofacial Surgery, School of Dentistry, Iwate Medical University, 19-1, Uchimaru, Morioka 020-8505, Iwate, Japan; (S.K.); (E.Y.); (I.H.); (H.Y.)
| | - Tadaharu Minamino
- Department of Elementary Material Process Technology, Iwate Industrial Research Institute, 2-4-25, Kitaiioka, Morioka 020-0857, Iwate, Japan; (T.M.); (S.K.)
| | - Shingo Kurosu
- Department of Elementary Material Process Technology, Iwate Industrial Research Institute, 2-4-25, Kitaiioka, Morioka 020-0857, Iwate, Japan; (T.M.); (S.K.)
| | - Hiroyuki Yamada
- Division of Oral and Maxillofacial Surgery, School of Dentistry, Iwate Medical University, 19-1, Uchimaru, Morioka 020-8505, Iwate, Japan; (S.K.); (E.Y.); (I.H.); (H.Y.)
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Chen CF, Chen CM, Huang WC, Liu SH, Wang LL, Liu PF, Chen PH. The use of customized 3D-printed mandibular prostheses with pressure-reducing device: A clinical trial. Head Neck 2024; 46:1614-1624. [PMID: 38328961 DOI: 10.1002/hed.27660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 01/08/2024] [Accepted: 01/17/2024] [Indexed: 02/09/2024] Open
Abstract
BACKGROUND Segmental bone defects of the mandible result in the complete loss of the affected region. We had incorporated the pressure-reducing device (PRD) designs into the customized mandible prostheses (CMP) and conducted a clinical trial to evaluate this approach. METHODS Seven patients were enrolled in this study. We examined the association among the history of radiotherapy, the number of CMP regions, the number of chin regions involved, and CMP exposure. RESULTS We included five men and two women with an average age of 55 years. We excised tumors with an average weight of 147.8 g and the average weight of the CMP was 68.5 g. No significant difference between the two weights was noted (p = 0.3882). Three patients received temporary dentures and the CMP remained stable in all patients. CONCLUSION The use of PRD in CMP may address the previous challenges associated with CMP, but further research is necessary.
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Affiliation(s)
- Chun-Feng Chen
- School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Oral and Maxillofacial Surgery, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
- Dental Laboratory Technology, Shu Zen College of Medicine & Management, Kaohsiung, Taiwan
| | - Chun-Ming Chen
- School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Wei-Chin Huang
- Laser and Additive Manufacturing Technology Center, Industrial Technology Research Institute, Hsinchu, Taiwan
| | - Sung-Ho Liu
- Laser and Additive Manufacturing Technology Center, Industrial Technology Research Institute, Hsinchu, Taiwan
| | - Ling-Lin Wang
- KSVGH Originals & Enterprises, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Pei-Feng Liu
- Department of Biomedical Science and Environmental Biology, College of Life Science, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Ping-Ho Chen
- School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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