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Volume 6

Journal of Oral Hygiene & Health

Endodontics & Orthodontics 2018

August 17-18, 2018

AUGUST 17-18, 2018 TOKYO, JAPAN

ANNUAL CONGRESS ON

Endodontics, Orthodontics,

Prosthodontics and Dental Implants

Durr e Shahwar Malik, J Oral Hyg Health 2018, Volume 6

DOI: 10.4172/2332-0702-C1-008

Association between maxillary posterior segment discrepancy and the angulation of maxillary molars

in patients with different vertical growth patterns

Durr E Shahwar Malik

Aga Khan University, Pakistan

Statement of the Problem:

The impaction of maxillary third molars causes the crowns of maxillary first and second molars

to tip distally in patients with maxillary posterior segment discrepancy. The aim of this study was to compare the maxillary

first and second molar angulations in patients with Maxillary Posterior Segment Discrepancy (MPSD) with Non-Maxillary

Posterior Segment Discrepancy (N-MPSD) and evaluate the effect of their angulations on various divergence patterns.

Materials & Method:

A cross-sectional study was conducted using the pre-treatment lateral cephalograms of 180 subjects

which were divided into two groups i.e. MPSD and N-MPSD. The Mann-Whitney U test was applied to compare various

skeletal and dental parameters between the two groups and a pairwise comparison was made among the vertical growth

patterns.The KruskalWallis test was used to compare themeanmolar angulations and overbite among the three divergence patterns.

Result:

The ratio of anterior to total palatal plane (p≤0.001) and the molar angulation (p≤0.001) showed significant differences

between the MPSD and N-MPSD groups. In the MPSD group, significant differences were found between the overbite in

the normodivergent versus hyperdivergent (p≤0.001) and hypodivergent versus hyperdivergent groups (p≤0.001) and in the

angulation of the first maxillary molars in the normodivergent versus hyperdivergent groups (p≤0.001).

Conclusion & Significance:

MPSD causes reduced maxillary first and second molar angulations. A ratio of the anterior palatal

plane to total palatal plane length of ≥0.51 was seen in patients with impacted maxillary third molars.

Biography

Durr E Shahwar Malik is the resident at the Orthodontics Department of the Aga Khan University Hospital, Pakistan.