Optimization of stress distribution of bone-implant interface (BII)

Chunyu Zhang; Chunyu Zeng; Zhefu Wang; Ting Zeng; Yuehong Wang

doi:10.1016/j.bioadv.2023.213342

Optimization of stress distribution of bone-implant interface (BII)

Biomater Adv. 2023 Apr:147:213342. doi: 10.1016/j.bioadv.2023.213342. Epub 2023 Feb 15.

Authors

Chunyu Zhang¹, Chunyu Zeng², Zhefu Wang², Ting Zeng², Yuehong Wang³

Affiliations

¹ Xiangya Stomatological Hospital, Central South University, No. 72 Xiangya Street, Kaifu District, Changsha, 410008, Hunan, China; Xiangya School of Stomatology, Central South University, No. 72 Xiangya Street, Kaifu District, Changsha, 410008, Hunan, China; Hunan 3D Printing Engineering Research Center of Oral Care, No. 64 Xiangya Street, Kaifu District, Changsha, 410008, Hunan, China. Electronic address: zhangchvnyu@csu.edu.cn.
² Xiangya Stomatological Hospital, Central South University, No. 72 Xiangya Street, Kaifu District, Changsha, 410008, Hunan, China; Xiangya School of Stomatology, Central South University, No. 72 Xiangya Street, Kaifu District, Changsha, 410008, Hunan, China; Hunan 3D Printing Engineering Research Center of Oral Care, No. 64 Xiangya Street, Kaifu District, Changsha, 410008, Hunan, China.
³ Xiangya Stomatological Hospital, Central South University, No. 72 Xiangya Street, Kaifu District, Changsha, 410008, Hunan, China; Xiangya School of Stomatology, Central South University, No. 72 Xiangya Street, Kaifu District, Changsha, 410008, Hunan, China; Hunan 3D Printing Engineering Research Center of Oral Care, No. 64 Xiangya Street, Kaifu District, Changsha, 410008, Hunan, China. Electronic address: wangyuehong1999@csu.edu.cn.

PMID: 36841109
DOI: 10.1016/j.bioadv.2023.213342

Abstract

Many studies have found that the threshold of occlusal force tolerated by titanium-based implants is significantly lower than that of natural teeth due to differences in biomechanical mechanisms. Therefore, implants are considered to be susceptible to occlusal trauma. In clinical practice, many implants have shown satisfactory biocompatibility, but the balance between biomechanics and biofunction remains a huge clinical challenge. This paper comprehensively analyzes and summarizes various stress distribution optimization methods to explore strategies for improving the resistance of the implants to adverse stress. Improving stress resistance reduces occlusal trauma and shortens the gap between implants and natural teeth in occlusal function. The study found that: 1) specific implant-abutment connection design can change the force transfer efficiency and force conduction direction of the load at the BII; 2) reasonable implant surface structure and morphological character design can promote osseointegration, maintain alveolar bone height, and reduce the maximum effective stress at the BII; and 3) the elastic modulus of implants matched to surrounding bone tissue can reduce the stress shielding, resulting in a more uniform stress distribution at the BII. This study concluded that the core BII stress distribution optimization lies in increasing the stress distribution area and reducing the local stress peak value at the BII. This improves the biomechanical adaptability of the implants, increasing their long-term survival rate.

Keywords: Biomechanical behavior; Dental implant; Stress concentration; Stress distribution pattern.

Publication types

Review

MeSH terms

Bone and Bones
Bone-Implant Interface*
Dental Occlusion, Traumatic*
Humans
Osseointegration
Stress, Mechanical