Finite Element Analysis of Two Fixed Prosthesis Treatment Concepts in Atrophic Maxilla.

doi:10.13701/j.cnki.kqyxyj.2019.10.006

Abstract

Abstract: Objective: To compare two fixed prosthesis treatment concepts supported by four implants in an atrophic maxilla. Methods: Two different treatment concept models were constructed. The conventional group was two mesial vertical implants in the lateral incisor regions and two distal tilted (45°) implants in the second premolar regions of the maxilla. The modified group was two mesial vertical implants in the lateral incisor regions and two short vertical implants in the second premolar regions of the maxilla. Numerical simulation was performed under two loading types. Results: Under the first loading type, the conventional group showed a higher stress concentration than the modified group in the bones. For the implants, the peak of von-Mises stress of the conventional group was lower than that of the modified group. Under the second loading type, the conventional group showed higher stress concentrations than the modified group, either on the bones or on the implants. Conclusion: Both treatment concepts can be applied in edentulous maxilla. Compared to the conventional group, the modified group can transmit less occlusal force to the supporting tissues.

Key words: all-on-4, short implant, tilted implant, finite element analysis

MU Zhixiang, LIU Ting, CHEN Tao, WANG Chao, HUANG Yuanding. Finite Element Analysis of Two Fixed Prosthesis Treatment Concepts in Atrophic Maxilla.[J]. Journal of Oral Science Research, 2019, 35(10): 931-935.

References

[1] Luz J, Greutmann D2, Wiedemeier D, et al. 3D-evaluation of the maxillary sinus in cone-beam computed tomography [J]. Int J of Implant Dent, 2018, 4(1):17.
[2] 张兴,刘英,陈松龄,等.上颌窦内提升不植骨同期种植术——3年临床回顾性研究[J].口腔医学研究,2016,32(1):46-49.
[3] Ayub KV, Ayub EA, Lins do Valle A, et al. Seven-year follow-up of full-arch prostheses supported by four implants: a prospective study [J]. Int J Oral Maxillofac Implants, 2017, 32(6):1351-1358.
[4] Ayna M, Wessing B, Gutwald R,et al. A 5-year prospective clinical trial on short implants (6mm) for single tooth replacement in the posterior maxilla:immediate versus delayed loading [J]. Odontology, 2019, 107(2):244-253.
[5] 王倩倩,陈中中,杨亚茹,等.基于FEA的种植体个性化选择及力学性能评价[J].口腔医学研究, 2017, 33(3):307-310.
[6] Lofaj F, Kucera J, Németh D, et al. Optimization of Tilted implant geometry for stress reduction in All-on-4 treatment concept: finite element analysis study [J]. Int J Oral Maxillofac Implants, 2018, 33(6):1287-1295.
[7] Bhering CL, Mesquita MF, Kemmoku DT,et al. Comparison between all-on-four and all-on-six treatment concepts and framework material on stress distribution in atrophic maxilla: A prototyping guided 3D-FEA study [J]. Mater Sci Eng C Mater Biol Appl, 2016, 69:715-725.
[8] Silva GC, Mendonça JA, Lopes LR, et al. Stress patterns on implants in prostheses supported by four or six implants: a three-dimensional finite element analysis [J]. Int J Oral Maxillofac Implants, 2010, 25(2):239-246.
[9] Maló P, de Araújo Nobre M, Lopes A, et al. All-on-4^® treatment concept for the rehabilitation of the completely edentulous mandible: a 7-year clinical and 5-year radiographic retrospective case series with risk assessment for implant failure and marginal bone level [J]. Clin Implant Dent Relat Res, 2015, 17 Suppl 2:e531-e541.
[10] Chen Y, Wang C, Huang Y, et al. Biomechanical evaluation of the natural abutment teeth in combined tooth-implant-supported telescopic prostheses: a three-dimensional finite element analysis [J]. Comput Methods Biomech Biomed Engin, 2017,20(9):967-979.
[11] Chen J, Zhang Z, Chen X, et al. Influence of custom-made implant designs on the biomechanical performance for the case of immediate post-extraction placement in the maxillary esthetic zone: a finite element analysis [J]. Comput Methods Biomech Biomed Engin, 2017, 20(6):636-644.
[12] Verri FR, Cruz RS, de Souza Batista VE, et al. Can the modeling for simplification of a dental implant surface affect the accuracy of 3D finite element analysis [J]. Comput Methods Biomech Biomed Engin, 2016,19(15):1665-1672.
[13] 周立伟,陈向深,乔永刚,等.纳米羟基磷灰石/聚醚醚酮复合种植体受力的三维有限元分析[J].口腔医学研究,2016,32(4):391-394.
[14] 葛奕辰,蒋少康,李轻如,等.“All-on-4”在不同骨质条件下应力分布的三维有限元分析[J].口腔医学研究,2016,32(12):1252-1256.
[15] Corbella S, Taschieri S, Del Fabbro M. Long-term outcomes for the treatment of atrophic posterior maxilla: a systematic review of literature [J]. Clin Implant Dent Relat Res, 2015, 17(1):120-132.
[16] Sotto-Maior BS, Senna PM, da Silva-Neto JP,et al. Influence of crown-to-implant ratio on stress around single short-wide implants: a photoelastic stress analysis [J]. J Prosthodont, 2015, 24(1):52-56.
[17] Kaleli N, Sarac D, Külünk S, et al. Effect of different restorative crown and customized abutment materials on stress distribution in single implants and peripheral bone: A three-dimensional finite element analysis study [J]. J Prosthet Dent, 2018, 119(3):437-445.
[18] Maló P, Lopes A, de Araújo Nobre M, et al. Immediate function dental implants inserted with less than 30N·cm of torque in full-arch maxillary rehabilitations using the All-on-4 concept: retrospective study [J]. Int J Oral Maxillofac Surg, 2018, 47(8):1079-1085.