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Open research questions in dental development and anomalies

121 unresolved questions extracted from the limitations and future-work sections of 4,583 dental development and anomalies papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • Several limitations should be acknowledged. First, this work represents a narrative review with conceptual framework development rather than a systematic review. Although a structured and purposive search strategy was employed, the thresholds and associations proposed are based on the best available evidence and may require refinement as new data emerge. Consistent with the narrative review design, no formal quality appraisal of individual studies was performed. Second, the selection of six sentinel findings was intentional to maintain clinical usability; however, other potentially relevant findings facial dysmorphisms, or skeletal asymmetries) were not included and may warrant incorporation in future iterations. supernumerary specific teeth, (e.g., to specialist services. Many in clinical settings. Consequently, use of Third, the framework has not yet undergone prospective validation. Its diagnostic performance, including sensitivity, specificity, and impact on referral patterns, remains to be the established framework may result in false-positive triggers (i.e., referral of patients without an underlying syndrome) and potential overreferral sentinel findings demonstrate limited diagnostic specificity when considered in isolation, and phenotypic expression of syndromic conditions may vary considerably between individuals, increasing the risk of both false-positive referrals and missed presentations. These risks are inherent to screening-oriented approaches and should be balanced against the potential benefit of earlier recognition and timely referral. Furthermore, over-reliance on thresholdbased reasoning could inadvertently reduce reliance on broader clinical judgment; therefore, the framework is intended as an adjunct to, rather than a replacement for, comprehensive clinical assessment.

    A conceptual clinical reasoning framework for early syndromic recognition in dental practice · 2026 · DOI

  • Prospective validation of the framework is essential before routine clinical implementation. Future research should follow a stepwise approach: • Content validation using structured expert consensus methods (e.g., Delphi methodology) to refine sentinel findings, thresholds, and referral criteria. • Retrospective case–control studies comparing confirmed estimate specificity, cases sensitivity, and non-syndromic syndromic diagnostic performance positive predictive value). (e.g., to • Inter-clinician reliability studies (e.g., kappa statistics) to framework application among assess consistency of general dental practitioners. • Prospective pilot studies in general dental settings to evaluate referral appropriateness, feasibility, and potential effects on time to syndromic recognition. real-world clinical utility, tools Integration with digital decision-support systems may further enhance usability. Emerging technologies such as AI-based facial phenotyping (e.g., Face2Gene, GestaltMatcher) may complement pattern recognition, although their role in routine dental practice remains exploratory (17). The framework may also be expanded to include additional sentinel findings as evidence evolves. Its educational value could be evaluated through structured assessments such as objective structured clinical examinations or script concordance testing (54).

    A conceptual clinical reasoning framework for early syndromic recognition in dental practice · 2026 · DOI

  • Despite the absence of statistically significant differences in the systemic IGF, IGFBP, and HGH levels between the individuals with and without hypodontia, the findings remain informative in an underexplored area of dental research.

    Preliminary Insights into Association of Growth Factors with Hypodontia: A Clinical Study · 2026 · DOI

  • clinical Future multicenter studies including broader populations, detailed confirmatory risk-factor profiling, diagnostic methods such as cone-beam computed tomography or histopathological analysis when indicated are warranted to further the epidemiological understanding of radiographically detected dental anomalies and jawbone lesions.

    Panoramic radiographic prevalence of dental developmental anomalies and jaw lesions in Mallorca, Spain: a retrospective cross-sectional study · 2026 · DOI

  • Con- versely, O’Meara [25] reported conflicting results, finding no association between increased frequency and bilateral occurrence. With respect to unilateral or bilateral occurrence, there is no consensus in the literature.

    Ectopic eruption of permanent first molars: a cross-sectional study in the mixed dentition · 2026 · DOI

  • Generally, it has to be remarked that panoramic radiographs are less precise than periapical radiographs or CBCTs for the determination of root resorptions, but due to the retrospective study set-up, these data did not exist.

    Apical root resorption in Class III patients following pronounced mandibular incisor retraction with lingual high precision fixed appliances: a retrospective cohort study · 2026 · DOI

  • This study presents several methodological limitations that must be acknowledged for accurate interpretation of the findings. First, the cross-sectional and retrospective design prevents the establishment of causal or temporal relation- ships between tooth agenesis and altered root morphology. Despite the verified statistically significant associations, the findings should be interpreted as correlations rather than cause-and-effect relationships. Second, the sample was ex- clusively obtained from private dental radiology centers, which may introduce a selection bias and limit the exter- nal validity of the results to broader populations, including those found in public healthcare systems. Additionally, the reduced sample size in specific subgroups may have de- creased the statistical power and limited the generalization of some analyses. Although three calibrated professionals carefully reviewed the records and rigorously excluded un- certain cases, the lack of access to complete clinical records represents an additional limitation, as it restricts the abil- ity to verify potentially confounding conditions. Root mor- phology assessment was based solely on two-dimensional periapical radiographs, which are less capable of detecting subtle three-dimensional variations than cone-beam com- puted tomography. Furthermore, the study did not incor- porate genetic or environmental variables, which influence dental development. Genes involved in root morphogene- sis, such as WNT10A and MSX1, as well as environmental factors during odontogenesis, may have contributed to the outcomes but were not assessed in this dataset. These limi- tations evidence the need for future prospective and multi- center studies that integrate clinical, radiographic, and ge- nomic data to deepen the understanding of root anomalies associated with tooth agenesis. Moreover, the imbalance between the groups with and without agenesis may compromise the precision of the esti- mates and limit the generalizability of the findings, particu- larly in the subgroups with lower representativeness. Future studies with more balanced samples and prospective multi- center designs are necessary to validate these findings with more robustness. Finally, this study suggests the need for future research investigating the interaction of environmental and epige- netic factors with genetic predispositions to influence root morphology, considering that the existing literature ad- dresses these factors in isolation rather than integrating their contributions for advanced development. Longitudinal studies, such as that of Intarak et al. [8], may provide valu- able insights into the impact of external factors on tooth development and their clinical implications.

    Association between tooth agenesis and root morphology assessed by periapical radiographs · 2026 · DOI

  • Future research should focus on multicenter, prospective studies with standardized clinical assessment protocols to improve data accuracy and generalizability. Incorporating broader population samples and evaluating additional 6 https://doi.org/10.2147/CCIDE.S607554 Clinical, Cosmetic and Investigational Dentistry 2026:18 Powered by TCPDF (www.tcpdf.org)Powered by TCPDF (www.tcpdf.org) Torabi and Eshraqi variables, including socioeconomic and behavioral factors, would provide a more comprehensive understanding of the epidemiology of partial edentulism.

    Prevalence of Partial Edentulism Based on Kennedy Classification in a Teaching Hospital: A Retrospective Study · 2026 · DOI

  • The paper presents only a single case of a 20.6-year-old patient treated with anchor plate for mesial molar movement in skeletal Class III malocclusion with congenital premolar absence; no multi-center prospective cohort study or age-stratified comparison exists to establish efficacy and safety profiles across different age groups, particularly in younger individuals where superior stability is claimed.

    Skeletal Class III surgical orthodontic case of mandibular first molars mesially moved using an anchor plate for closing space from the congenital absence of mandibular second premolars · 2026 · DOI

  • The paper notes that substantial mesial movement of mandibular molars can be achieved with miniscrews by modifying biomechanics or performing corticotomy, but does not establish specific biomechanical load recommendations, force vectors, or corticotomy protocols optimized for mesial molar movement in congenital absence of mandibular second premolars cases.

    Skeletal Class III surgical orthodontic case of mandibular first molars mesially moved using an anchor plate for closing space from the congenital absence of mandibular second premolars · 2026 · DOI

  • The paper states that anchor plate placement requires more invasive mucoperiosteal flap elevation than miniscrew insertion, resulting in increased post-operative facial swelling and pain, but provides no quantitative comparison of swelling duration, pain severity scores, or healing timelines between these two skeletal anchorage techniques in younger patients undergoing mesial molar movement.

    Skeletal Class III surgical orthodontic case of mandibular first molars mesially moved using an anchor plate for closing space from the congenital absence of mandibular second premolars · 2026 · DOI

  • While the paper demonstrates that anchor plates achieve stronger anchorage and reduce permanent tooth root damage risk compared to miniscrews during mesial molar movement, no long-term stability data (beyond 2.9 years post-treatment) or comparative clinical trials quantifying root resorption rates between anchor plate and miniscrew techniques in Class III surgical cases are presented.

    Skeletal Class III surgical orthodontic case of mandibular first molars mesially moved using an anchor plate for closing space from the congenital absence of mandibular second premolars · 2026 · DOI

  • The paper identifies that miniscrew placement in the mandibular premolar area becomes challenging when cortical bone thickness and interradicular space are insufficient, yet no comparative biomechanical analysis or clinical decision-making framework is provided to determine when anchor plate skeletal anchorage should be selected over miniscrew anchorage for mesial molar movement in patients with these anatomical constraints.

    Skeletal Class III surgical orthodontic case of mandibular first molars mesially moved using an anchor plate for closing space from the congenital absence of mandibular second premolars · 2026 · DOI

  • Since little is known on the morphology of the CEJ in animals, the aim of this study was to characterize the structure of the CEJ of dog teeth by SEM.

    Morphology of the Cementoenamel Junction in Permanent Teeth of Dogs: A Scanning Electron Microscopic Study · 2020 · DOI

  • OBJECTIVE: Root resorption due to orthodontic tooth movement may adversely affect the root-crown (R/C) ratios of permanent teeth, especially in patients with Short Root Anomaly (SRA), a poorly understood disorder affecting root development.

    Ethnic differences in the root to crown ratios of the permanent dentition · 2019 · DOI

  • The present results indicate that when clinical findings and dental X-rays alone are insufficient to allow a secure diagnosis, CBCT offers an effective alternative which will enable the appropriate treatment to be selected more reliably.

    CBCT-based Diagnosis of Periapical Lesion of Maxillary First Premolar Mimicking That of Second Premolar · 2016 · DOI

  • The occurrence of SRA in two families further confirms a hereditary component and supports a distinct nosology and nomenclature, hereditary idiopathic root malformation (HIRM) and warrants further investigation.

    Characterization of short root anomaly in a Mexican cohort – hereditary idiopathic root malformation · 2015 · DOI

  • BACKGROUND: Limited studies have proposed protocols for the management of failure of eruption (FOE) of permanent molars with no clear consensus or guidelines.

    Failure of eruption of permanent molars: a diagnostic dilemma · 2015 · DOI

  • The etiology of MIH has not been fully clarified; however it is supposed that environmental and systemic conditions may be possible reasons for this condition.

    Büyük azı ve kesici diş hipomineralizasyonu: etiyolojisi ve kliniği · 2015 · DOI

  • AIM: To gain further insights and resolve conflicting results in the literature regarding prevalence, predominant location and morphologic variability of maxillary sinus septa.

    Prevalence, location and morphology of maxillary sinus septa: systematic review and meta‐analysis · 2012 · DOI

  • Axially rotated maxillary CT and the severe periodontitis that they precipitate, have not been previously described as a discrete dental disease entity.

    Dental diastemata and periodontal disease secondary to axially rotated maxillary cheek teeth in three horses · 2010 · DOI

  • Bone resorption in incompletely impacted mandibular third molars and acute pericoronitis Minoru Yamaoka, Yusuke Ono, Masahiro Takahashi, Ryosuke Doto, Kouichi Yasuda, Takashi Uematsu, Kiyofumi FurusawaMatsumoto Dental University, School of Dentistry, Shiojiri, Nagano, JapanAbstract: Acute pericoronitis (AP) arises frequently in incompletely impacted mandibular third molars, but it remains unknown whether bone resorption in aging is associated with acute inflammation of the third molar.

    Bone resorption in incompletely impacted mandibular third molars and acute pericoronitis · 2009 · DOI

  • AIMS: The ability to predict the morbidity of retained deciduous teeth with no permanent successors, a characteristic of hypodontia, would be of considerable value in treatment planning, but is hampered by lack of data.

    Root resorption in retained deciduous canine and molar teeth without permanent successors in patients with severe hypodontia · 2001 · DOI

  • Lower second premolars account for approximately 24 per cent of impactions, excluding third molars, even though most reports in the literature relating to impacted teeth address the maxillary canine, with relatively few reports on the lower second premolar.

    Conservative management of lower second premolar impaction · 2000 · DOI

  • Abstract Background Despite previous anatomical studies on PMFMs, detailed classification and comprehensive measurements remain limited, and the association between crown and root morphology has not been systematically investigated.

    Three-dimensional morphological analysis of 67 primary mandibular first molars based on CBCT reconstructions · 2026 · DOI

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121 open questions have been extracted from the limitations and future-work passages of 4,583 dental development and anomalies papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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