CC BY-NC-ND 4.0 · Dental Journal of Advance Studies 2019; 07(01): 028-034
DOI: 10.1055/s-0039-1685129
Original Article
Bhojia Dental College and Hospital affiliated to Himachal Pradesh University

Comparison of Crown-Root Relationships of Maxillary Central Incisors in Various Malocclusions

Rajwinder Singh Brar
1  Department of Orthodontics and Dentofacial Orthopedics, Bhojia Dental College and Hospital, Baddi, Himachal Pradesh, India
,
Mandeep Bhullar
1  Department of Orthodontics and Dentofacial Orthopedics, Bhojia Dental College and Hospital, Baddi, Himachal Pradesh, India
,
Sanjay Mittal
1  Department of Orthodontics and Dentofacial Orthopedics, Bhojia Dental College and Hospital, Baddi, Himachal Pradesh, India
,
Divya Singla
1  Department of Orthodontics and Dentofacial Orthopedics, Bhojia Dental College and Hospital, Baddi, Himachal Pradesh, India
,
Isha Aggarwal
1  Department of Orthodontics and Dentofacial Orthopedics, Bhojia Dental College and Hospital, Baddi, Himachal Pradesh, India
› Author Affiliations
Further Information

Publication History

Received: 26 November 2018

Accepted after revision: 07 February 2019

Publication Date:
04 April 2019 (eFirst)

  

Abstract

Objective The purpose of this study is to compare the crown-root and labial crown-root angles in class I, class II division (div) 1, and class II div 2 malocclusions, using cephalometric radiographs, and to find a correlation between crown-root angulation and labial crown-root angle.

Materials and Methods A sample of 45 patients (23 females and 22 males) with age range from 11 to 27 years and mean age of 17 years was taken. The sample was divided into class I, class II div 2, and class II div 1 malocclusions with 15 patients in each group. The means for various parameters for each group were calculated, and multiple comparisons were made. For correlation of two parameters, Pearson's correlation was used for normally distributed data.

Results Mean crown-root angle for class I was 5.8 ± 6.5; for class II div 1, it was 5.3 ± 4.2; and for class II div 2, it was 15.6 ± 9.69 degrees. Mean labial crown root angle for class I was 28.8 ± 5.8; for class II div 1, it was 27.06 ± 4.9; and for class II div 2, it was 39.8 ± 9.8 degrees.

Conclusions Statistically higher values were seen for crown-root angle and labial crown-root angle in class II div 2 malocclusion. A significant correlation was seen between crown-root angle and labial crown-root angle in class I, class II div 1, and class II div 2 malocclusion.