Page 52 - MDA SCATE 2024 Programme Book

ORAL PRESENTATION

ABSTRACTS

A retrospective study on the prevalence of impacted premolars and
its association with premature loss of deciduous molars in paediatric
Abstract 4
dental patients, Hospital Serdang
NMRR Registration Number: NMRR ID-23-00517-6EL

Subramanyan, S., Subramaniam, S. D., & Mohamad Jaafar, I. B.1
1
2
1. Orthodontic Unit, Seri Kembangan Dental Clinic, 43300 Seri Kembangan,
Selangor.
2. Department of Paediatric Dentistry, Hospital Sultan Idris Shah, Serdang.

Introduction: Impacted premolars are premolars which fail to erupt within
the expected date of eruption and can no longer be expected to do so.
When deciduous molars are lost early before their natural exfoliation, mesial
migration of permanent molars leading to space loss and impaction of
premolars may occur.
Objectives:
i) To determine the prevalence of impacted premolars among patients with
early loss of deciduous molars and retained deciduous molars
ii) To determine the age of early loss of deciduous molars among patients
with impacted premolars
iii) To investigate the association between impacted premolar and early loss
of deciduous molar
iv) To describe the mean age of patients according to the position of premolar
impaction
Methodology: A total of 401 patients with Premature Loss of Deciduous
Molars (PLDM) were screened in this cross-sectional retrospective study and
this includes all impacted premolar tooth case records and radiograph from
the year 2017-2019. Demographic data, the age of PLDM, prevalence and
position of premolars impaction on orthopantomograms were collected.
Results: Among 401 cases, 23 presented with impacted premolars. Mean
age of PLDM among patients with impacted upper premolar was 4.8 years,
whereas those without impacted premolars was 5.7 years. Chi-square test
was performed and there was no significant association between impacted
premolar and PLDM. Impacted maxillary second premolars were classified
into seven types of positions, in which the group with PLDM having a
tendency to fall into types IV & VII. The other premolars were described as
vertical, horizontal and angular and the group with PLDM were observed in
the vertical position.
Conclusion: Although no significant association were observed between
PLDM and impacted premolars, impacted premolars were seen in the earlier
age group at which the deciduous molars were lost.

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