Evidence map›Paper›PMID 42449067›Full record

ArticleClinical oral investigations2026

Association between implant adjacency and survival of endodontically treated teeth.

Hsuan-Hung Chen, Yu-Ting Yeh, Ava Nazeri, Yi-Ching Ho, Guo-Hao Lin, Richard T Kao

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Article in Clinical oral investigations, 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

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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

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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

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0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

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PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Hsuan-Hung ChenDivision of Periodontics, Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan.
Yu-Ting YehDivision of Periodontology, Department of Orofacial Sciences, School of Dentistry, University of California San Francisco, San Francisco, CA, USA. Yu-ting.yeh@ucsf.edu.
Ava NazeriDivision of Orthodontics and Dentofacial Orthopedics, Roseman University of Health Sciences, Henderson, NV, USA.
Yi-Ching HoDepartment of Dentistry, School of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan.
Guo-Hao LinDepartment of Dentistry, School of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan.
Richard T KaoDivision of Periodontology, Department of Orofacial Sciences, School of Dentistry, University of California San Francisco, San Francisco, CA, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThis retrospective cohort study evaluated the association between implant adjacency and survival of endodontically treated teeth (ETT) and assessed factors associated with tooth loss due to vertical root fracture (VRF). MATERIALS AND

methodsPatient charts were reviewed to identify teeth adjacent and nonadjacent to implants. The primary outcome was cumulative survival of ETT by tooth location and implant adjacency. VRF was the secondary outcome. Kaplan-Meier analysis with log-rank tests compared survival, and multivariable logistic regression with generalized estimating equations accounted for clustering.

resultsA total of 787 patients with 2,048 adjacent and 15,637 nonadjacent teeth were included (mean follow-up: 57.1 months). Among 1,119 ETT, survival was highest in nonadjacent anterior teeth (126.5 months), followed by nonadjacent posterior (84.8 months), adjacent anterior (55.6 months), and adjacent posterior teeth (44.4 months) (p < 0.001). Sixty-three ETT (5.63%) were lost due to VRF. ETT adjacent to implants had significantly higher odds of VRF (aOR = 8.90; 95% CI, 4.03-19.64; p < 0.001), and post placement was independently associated with increased risk.

conclusionsImplant adjacency and posterior location were associated with reduced survival of ETT. Implant adjacency and post placement were independently associated with an increased risk of tooth loss due to VRF. CLINICAL RELEVANCE: ETT adjacent to dental implants may have reduced survival, particularly in posterior regions. Clinicians should be aware of the increased risk of VRF in these teeth, especially when post placement is present. Careful occlusal management and regular follow-up may help mitigate the risk of tooth loss.

Indexed as

Dental ImplantsDental Restoration FailureTooth FracturesTooth, NonvitalAgedFemaleHumansMaleMiddle AgedRetrospective StudiesRisk FactorsDental ImplantsDental implantsEndodontically treated teethImplant adjacencyTooth survivalVertical root fracture

Identifiers

PMID42449067

What OpenQuestion 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 OpenQuestion graph.