Relevant factors of posterior mandible lingual plate perforation during immediate implant placement: a virtual implant placement study using CBCT

BMC Oral Health

Research

Yiqun Zhou¹  Zhijian Xie¹  Yingjia Sun¹  Sai Hu² 

[1] Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, 310000, Hangzhou, People’s Republic of China;The Fourth Affiliated Hospital, Zhejiang University School of Medicine, N1 Shangcheng Road, 322000, Yiwu, Zhejiang, People’s Republic of China;

关键词: Cone-beam computed tomography;    Immediate implant placement;    Mandible;    Molar;    Complication;   

DOI  :  10.1186/s12903-022-02696-z

 received in 2022-09-15, accepted in 2022-12-26,  发布年份 2022

来源: Springer

【 摘 要 】

BackgroundTo explore the influence of cross-sectional type and morphological parameters at the mandibular molar sites on lingual plate perforation (LPP) during the immediate implant placement (IIP).Methods181 implants were virtually placed in the mandibular molar sites on the cone beam computed tomography (CBCT). Each cross-section of the implantation site was divided into the Undercut (U)/Parallel (P)/Convex (C) types. Morphologically relevant parameters were measured on the cross-sections, including width of the upper end (Wb), width of the lower end (Wc), vertical height (V), angle between the natural crown axis and the alveolar bone axis (∠β), LC depth (LCD), LC height, and angle between the horizontal line and the line connecting the most prominent point and the most concave point of lingual plate (∠α). Besides, the distance from the end of the virtual implant and the lingual bone plate of the cross-section (DIL) was calculated. Relationships between all the morphologically relevant parameters and the DIL were further analyzed.ResultsA total of 77 (42.5%) cross-sections were classified as U-type, which was the most common one, accounting for 63% of the second molar regions. All LPP cases and most of the nearly LPP (87.9%) cases occurred at the U-type cross-sections, and the relationship between the DIL and the morphological parameters can be expressed by a multivariate linear equation.ConclusionsThe occurrence rate of U-type cross-sections in the second molar region was very high, and the risk of LPP should be considered during IIP. Except for the U-type, significant large LCD, small Wc, and large ∠β were the important relevant factors. CBCT and multivariate linear equations could help to assess the LPP risk and provide a reference for implant placement design pre-surgery.

【 授权许可】

CC BY   
© The Author(s) 2023

【 图 表 】

Fig. 7

Fig. 3

Fig. 9

Fig. 4