PhD Scientific Days 2025

Poster Session III. - S: Dental Research

Early Space Management through Premolar Enucleation: A Retrospective Analysis of Class I Crowding Cases

Előadó neve

Dr. Heckenast Lili

Neptun code

h9uyhw

Előadó munkahelye

Department of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, Semmelweis University

Előadó telefonszáma

+36306445272

Előadó e-mail címe

heckenast.l@gmail.com

Az előadás címe

Early Space Management through Premolar Enucleation: A Retrospective Analysis of Class I Crowding Cases

Szerző(k) neve és munkahelye

Dr. Lili Heckenast¹, Domingo Martín², Bálint Nemes¹, Andreu Puigdollers³, Dorottya Frank⁴

1: Department of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, Semmelweis University
2: Private Practice Martin-Goenaga, San Sebastián, Spain
3: Department of Orthodontics and Dentofacial Orthopaedics, Faculty of Dentistry, International University of Catalunya
4: Department of Dentistry, Oral and Maxillofacial Surgery, University of Pécs

Bemutatás módja

Poszter

Szekció

Poster Session III. - S: Dental Research

Language of the presentation

Hungarian

Preferred session

Dental Research

Összefoglaló szövege

Introduction
Premolar enucleation, a less explored variant of serial extraction, aims to create early space in the dental arch to encourage spontaneous alignment. Unlike traditional serial extraction, it involves removing premolars before eruption, potentially reducing treatment complexity.

Aims
The present research investigates the effects of premolar enucleation on incisor inclination, molar position, and alignment in cases of severe crowding.

Method
This retrospective study reviewed records of 43 Class I patients (19 males, 24 females) with severe crowding, treated via a modified serial extraction protocol. The sequence involved removal of deciduous canines, deciduous first molars, and enucleation of permanent first premolars. No appliances were used during this phase; fixed multiband appliances followed later.
Plaster models were analyzed at T0 (pre-enucleation) with Moyers analysis and at T1 (before fixed appliances) using arch length discrepancy.
Cephalometric changes in incisor inclination, molar tipping, overjet, and overbite were measured digitally at T0 and T1.
All measurements were performed independently three times by two experienced orthodontists.

Results
Out of 43 patients, 23 met inclusion criteria.
Model analysis showed arch space improvement: upper from −9.07 mm to +4.07 mm, and lower from −10.83 mm to +4.17 mm.
Cephalometric analysis revealed increases in the interincisal angle (+4.73°) and overbite (+1.66 mm), and decreases in lower incisor to NB distance (−0.82 mm) and angle (−2.98°). Molar angulation changed, with L6 inclination increasing by 3.85° (p = 0.004) relative to the mandibular plane and U6 by 3.57° (p = 0.008) relative to the palatal plane. L6 mesial movement along the NB line was ≈0.78 mm (p < 0.01). Other parameters showed no significant change.

Conclusion
Premolar enucleation appears effective in addressing severe crowding in Class I cases, promoting spontaneous alignment and significant space gain without early appliance use. The procedure supports controlled incisor retrusion, mesial molar movement, and a moderate increase in overbite, contributing to favorable vertical development of the occlusion. Though promising, patient variability underscores the need for careful case selection.

Funding
This study received no external funding.

University

Semmelweis University

Supervisor

Prof. Dr. Rózsa Noémi Katinka habil. PhD, Dr. Frank Dorottya PhD

Publication of my abstract

I give consent to the publication of my abstract on the website of the congress.

phd.section.field

in doctoral studies before complex exam (PhD)

Kind

Szabad

Status

elfogadva

Accepted presentation method

poszter

Előadás fájl jóváhagyás

nem rendelkezett róla

Előadó

8922

Start

14:00

End

14:06