Evidence mapPaperPMID 41978331Full record

Trial reportClinical implant dentistry and related research2026

Thread Depth Effects on Stability and Positional Accuracy in Guided Immediate Implants: A Randomized Controlled Trial.

Na-Yoon Kwon, Ji-Young Jung, Kyung-A Ko, Seung-Hyun Park, Franz Josef Strauss, Jung-Seok Lee

Abstract readRandomized Controlled Trial
In one paragraph

Trial report in Clinical implant dentistry and related research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

6 authors.

Na-Yoon KwonDepartment of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, South Korea.ORCID https://orcid.org/0009-0008-7682-3704
Ji-Young JungDepartment of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, South Korea.ORCID https://orcid.org/0000-0002-3454-9996
Kyung-A KoDepartment of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, South Korea.ORCID https://orcid.org/0000-0002-4835-8509
Seung-Hyun ParkDepartment of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, South Korea.ORCID https://orcid.org/0000-0002-6207-8036
Franz Josef StraussClinic of Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland.ORCID https://orcid.org/0000-0002-5832-7327
Jung-Seok LeeDepartment of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, South Korea.ORCID https://orcid.org/0000-0003-1276-5978

Funding

Megagen Implant Co., Ltd.National Research Foundation of Korea 2022R1A2C2005537
6 · The paper itself

Abstract

objectivesTo evaluate the influence of implant thread depth on implant stability and positional accuracy in fully guided immediate implant placement. MATERIALS AND

methodsFifty-four patients received a reference tapered (BLT), a standard-thread (MST), or a deep-thread implant (MDT). Fifty-four implants were placed using fully guided surgery and evaluated over 1-year follow-up. Primary outcomes were implant stability (insertion torque, ISQ, ISV). Secondary outcomes included positional accuracy and marginal bone level (MBL) at 12 months.

resultsPrimary and longitudinal stability were comparable across groups. Insertion torque was highest for MDT implants, followed by MST and BLT implants (BLT: 35.28 ± 11.18; MST: 40.00 ± 11.88; MDT: 43.89 ± 10.92 Ncm; p = 0.062). A higher proportion of MDT implants achieved insertion torque ≥ 40 Ncm (MDT: 14/18; MST: 12/18; BLT: 8/18). Angular deviation differed among implant groups (MDT: 5.57° ± 3.71°; BLT: 4.73° ± 2.46°; MST: 3.58° ± 1.81°; p = 0.062). In subgroup analysis comparing implants differing only in thread depth (MST vs. MDT), angular deviation was significantly greater for MDT (p = 0.029), particularly in molar sites. At 12 months, MBL did not differ significantly among groups.

conclusionsIn fully guided immediate implant placement, deeper-thread implants showed higher insertion torque values but were associated with greater angular deviation, while longitudinal stability and marginal bone levels remained comparable. Deeper-thread designs may be beneficial when enhanced primary stability is required, provided careful angulation control is ensured.

trial registrationcris.nih.go.kr Identifier: KCT0009402; This clinical trial was not registered prior to participant recruitment and randomization.

Indexed as

Dental Implantation, EndosseousDental ImplantsImmediate Dental Implant LoadingAdultDental Prosthesis DesignDental Prosthesis RetentionFemaleHumansMiddle AgedTorqueDental Implantsimmediate implantimplant stabilitymacro‐designmarginal bone levelpositional accuracythread depth

Identifiers

PMID41978331
PMCPMC13077180

What Socratic holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.