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- Title
Improved anchoring nails: design and analysis of resistance ability.
- Authors
Zhou, Z. H.; Chen, X. Z.; Chen, X. W.; Wang, Y. X.; Zhang, S. Y.; Sun, S. F.; Zhen, J. Z.
- Abstract
Background: Anchorage is one of the most important treatments for severe temporomandibular joint disorder (TMD). Anchoring nails have shown great success in clinical trials; however, they can break under pressure and are difficult to remove. In this study, we aimed to evaluate an improved anchoring nail and its mechanical stability. Methods: The experiment consisted of two parts: a tensile test and finite element analysis (FEA). First, traditional and improved anchoring nails were implanted into the condylar cortical bone and their tensile strength was measured using a tension meter. Second, a three-dimensional finite element model of the condyles with implants was established and FEA was performed with forces from three different directions. Results: The FEA results showed that the total force of the traditional and improved anchoring nails is 48.2 N and 200 N, respectively. The mean (±s.d.) maximum tensile strength of the traditional anchoring nail with a 3–0 suture was 27.53 ± 5.47 N. For the improved anchoring nail with a 3–0 suture it was 25.89 ± 2.64 N and with a 2–0 suture it was above 50 N. The tensile strengths of the traditional and improved anchoring nails with a 3–0 suture was significantly different (P = 0.033–< 0.05). Furthermore, the difference between the traditional anchoring nail with a 3–0 suture and the improved anchoring nail with a 2–0 suture was also significantly different (P = 0.000–< 0.01). Conclusion: The improved anchoring nail, especially when combined with a 2–0 suture, showed better resistance ability compared with the traditional anchoring nail.
- Subjects
TEMPOROMANDIBULAR joint surgery; COMPACT bone; FINITE element method; MATERIALS testing; SUTURES; PRODUCT design; TENSILE strength; SURGERY
- Publication
BMC Oral Health, 2018, Vol 18, Issue 1, pN.PAG
- ISSN
1472-6831
- Publication type
Article
- DOI
10.1186/s12903-018-0606-3