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

Young Woo Song, Jin Young Park, Ji Young Jung, Joo Nyeon Kim, Kyung Seok Hu, Jung Seok Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)116-126
Number of pages11
JournalClinical Oral Implants Research
Volume34
Issue number2
DOIs
Publication statusPublished - 2023 Feb

Bibliographical note

Publisher Copyright:
© 2022 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

All Science Journal Classification (ASJC) codes

  • Oral Surgery

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