Evidence map›Paper›PMID 42518062›Full record

ArticleOdontology2026

Association of molar interradicular distance and angulation with periodontal disease severity: a cross-sectional study.

Yan Wang, Kun Wang, Chuyi Jin, Mengyao Ding, Yifan Xie, Xiaohang Xu, Yunnan Jin, Lipei Liu, Xing Chen, Qiang Chen and 1 more

Abstract read
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In one paragraph

Article in Odontology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
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

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

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.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

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

11 authors.

Yan Wang *Stomatology Center, Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, 310015, China.
Kun Wang *Stomatology Center, Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, 310015, China.
Chuyi JinStomatology Center, Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, 310015, China.
Mengyao DingStomatology Center, Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, 310015, China.
Yifan XieStomatology Center, Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, 310015, China.
Xiaohang XuStomatology Center, Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, 310015, China.
Yunnan JinStomatology Center, Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, 310015, China.
Lipei LiuStomatology Center, Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, 310015, China.
Xing ChenStomatology Center, Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, 310015, China.
Qiang ChenDepartment of Periodontics, Suzhou Stomatological Hospital, Suzhou, China. chenqiang@szkqyy.com.
Cheng DingStomatology Center, Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, 310015, China. cheng0710@gmail.com.

Funding

the Hangzhou Biological Medicine and Health Industry Development Support Science and Technology Project No. 2023WJC034the Suzhou Science and Technology Innovation Project of Medical and Health Care Innovation No. SYW2025082
6 · The paper itself

Abstract

This retrospective cross-sectional study evaluated associations of molar interradicular distance (IRD) and tooth angulation with clinical and radiographic indicators of periodontitis severity in 316 patients. IRD at the cemento-enamel junction (R0), mid-root (R1), and apical third (R2), along with premolar-molar (α) and molar-molar (β) angulation, bone loss (BL), horizontal and vertical furcation bone loss (h-BL and v-BL), and bone-loss pattern, were measured by cone-beam computed tomography (CBCT). Generalized estimating equation (GEE) models adjusted for age, sex, and plaque index (PI) and accounted for within-patient clustering of tooth-level observations. Mandibular molars had wider IRD at all three levels and greater β than maxillary molars (all p < 0.001). In the maxilla, wider R0 and R2 were associated with greater distal clinical attachment loss (CAL) of first molars, whereas R0-R2 were positively associated with mesial probing depth (PD) of second molars (all p < 0.05). β showed negative associations with maxillary CAL and mesial bleeding on probing (BOP) of second molars (p < 0.05). In the mandible, wider R0-R2 were associated with greater distal PD and CAL of first molars (all p < 0.05), and β was positively associated with distal CAL of first molars (p = 0.005). Wider R0 and R2 were also associated with greater distal BL in maxillary first molars (p < 0.01); R0 was associated with v-BL and a vertical bone-loss pattern in maxillary first molars, whereas R0 and R1 were associated with a vertical bone-loss pattern in mandibular first molars (p < 0.05). Overall, IRD and molar angulation showed heterogeneous, site-specific associations with clinical and radiographic periodontal parameters. These cross-sectional findings support interpreting IRD and angulation as adjunctive anatomical correlates of local disease expression rather than primary etiologic determinants or stand-alone predictors of periodontitis.

Indexed as

Cone-beam computed tomographyInterradicular distanceMolar angulationPeriodontitisRoot proximity

Identifiers

PMID42518062

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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.