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Does the fixture thread depth affect the accuracy of implant placement during fully guided immediate implant placement?: A human cadaver study

Authors
 Young Woo Song  ;  Jin-Young Park  ;  Ji-Young Jung  ;  Joo-Nyeon Kim  ;  Kyung-Seok Hu  ;  Jung-Seok Lee 
Citation
 CLINICAL ORAL IMPLANTS RESEARCH, Vol.34(2) : 116-126, 2023-02 
Journal Title
CLINICAL ORAL IMPLANTS RESEARCH
ISSN
 0905-7161 
Issue Date
2023-02
MeSH
Cadaver ; Computer-Aided Design ; Cone-Beam Computed Tomography ; Dental Implantation, Endosseous ; Dental Implants* ; Humans ; Imaging, Three-Dimensional ; Surgery, Computer-Assisted*
Keywords
dental implant ; guided implant surgery ; human cadaver study ; immediate implant placement ; positional accuracy
Abstract
Background: The fixture thread depth reportedly influences the primary stability of dental implant, but its effect on the positional accuracy in immediate implant placement has not been reported previously.

Materials and methods: Fifty-six single-rooted, anterior and premolar teeth were extracted from six human cadavers, followed by installing either regular-threaded implants (RT group, N = 30) or deep-threaded implants (DT group, N = 26) completely relying on the surgical guide. Optical impressions taken after osteotomy and fixture installation were superimposed with the preoperative virtual planning data to measure the vertical, angular, platform and apex deviations that occurred during osteotomy and installation.

Results: While the osteotomy deviations were similar between the two groups, the angular and apex deviation of the DT group (2.67 ± 2.56°; 1.04 ± 0.49 mm, respectively) were significantly larger than those of the RT group (1.61 ± 1.04°; 0.67 ± 0.41 mm, respectively) during installation (p < .05). When the installation deviations were analysed in the anterior and premolar areas separately, the angular, platform and apex deviations of the DT group (3.05 ± 3.26°; 0.75 ± 0.32 mm; 1.08 ± 0.56 mm, respectively) were significantly larger than those of the RT group (1.56 ± 0.73°, 0.59 ± 0.28 mm; 0.62 ± 0.38 mm, respectively) in the anterior site (p < .05), whereas there was no significant intergroup difference in the premolar site.

Conclusion: In immediate-implant surgery, using an implant with a deeper thread might increase the deviations during installation, especially in the anterior area.
Full Text
https://onlinelibrary.wiley.com/doi/10.1111/clr.14023
DOI
10.1111/clr.14023
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Oral Biology (구강생물학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Periodontics (치주과학교실) > 1. Journal Papers
Yonsei Authors
Park, Jin Young(박진영)
Song, Young Woo(송영우) ORCID logo https://orcid.org/0000-0003-1835-5646
Lee, Jung Seok(이중석) ORCID logo https://orcid.org/0000-0003-1276-5978
Hu, Kyung Seok(허경석) ORCID logo https://orcid.org/0000-0002-9048-3805
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/193615
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