Short- and long-term dental arch spatial changes following premature loss of primary molars
Notice bibliographique
Résumé
Aim: The aim of this study was to evaluate the dental arch spatial changes in maxillary and mandibular arches after premature loss of primary molars. Introduction: Primary teeth must be maintained during the change from primary to mixed and then permanent dentition, to preserve and maintain the dental arch. When this normal process is disturbed, usually due to severe decay requiring extraction before normal exfoliation, it can result in migration of adjacent teeth toward the missing space resulting in decreased arch length and malocclusion in the permanent dentition. Materials and Methods: A comprehensive search was conducted using electronic databases such as PubMed Central, Cochrane Database of Systematic Reviews, Google Scholar, LILACS, and ScienceDirect. The title and abstract were screened to find relevant articles, which were then reviewed in full to see if they were worthy of inclusion. All longitudinal and observational studies that looked at space changes after the loss of primary first or second molars were included. Quality assessment of the studies was done based on the Newcastle-Ottawa scale as all the included studies were non-randomized studies. Results: Four thousand five hundred and seventy-eight articles were identified by screening electronic database and assessed for eligibility, 12 full-text articles were assessed, and 4 full-text articles were excluded as they did not match the inclusion criteria. Thus, eight articles were included in this systematic review. Short term and long term space changes and loss of maxillary and mandibular molars were studied individually. In the short term changes, the distal migration of the primary cuspid towards the missing space within 1 month was attributable to early space changes after premature loss of the mandibular first molar, and the greatest space loss was recorded in the first 3 months after premature loss. After the premature loss of the maxillary first molar, immediate space loss of 1mm was documented due to distal migration of the primary canine. Studies found that space loss was caused by the distal migration of primary canines in the case of mandibular primary first molar loss, and that space loss was larger in the mandibular arch after premature loss of second primary molars. Conclusion: The greatest repercussions occurred during the first 3 months after the deciduous molars were extracted, and a space maintainer was recommended in the majority of cases, mainly when there is premature loss of mandibular second primary molar as it leads to mesial displacement of the first permanent molar.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,004 | 0,016 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,000 |
| Méta-épidémiologie (sens large) | 0,003 | 0,004 |
| Bibliométrie | 0,004 | 0,003 |
| Études des sciences et des technologies | 0,000 | 0,001 |
| Communication savante | 0,002 | 0,002 |
| Science ouverte | 0,001 | 0,001 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,003 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».