Influence of vertical dimension on the degree of dentoalveolar compensation in patients with severe Class III malocclusion
Journal Title: Journal of Stomatology (Czasopismo Stomatologiczne) - Year 2015, Vol 68, Issue 5
Abstract
Introduction. The range of dentoalveolar compensation accompanying severe Class III malocclusions should be taken into consideration when planning orthodontic- surgical treatment. Aim of the study. To evaluate the effect of bones bases inclination on dentoalveolar compensation in patients with severe Class III malocclusions, in whom treatment plan includes SAMRE or TPD therapy. Material and methods. Cephalometric images in the lateral projection and 42 models with skeletal Class III. The material was divided into three groups based on the bones bases angle NLML, accepting the following criteria: less than 20.5° – group of low angle (L), in the range of 20.5°-26.5° – group of average angle (A), more than 26.5° – group of high angle (H). Measurements were made on models using an electronic caliper accurate to 0.01 mm using WALA and FA points for both dental arches (6±6, 5±5, 4±4, 3±3). In estimation of the compatibility of distribution the Shapiro-Wilk test was used. Nonparametric methods were used in statistical conclusions. The evaluation of the differences in the distribution of the quantitative variables between the three groups (L, A, H) was performed using the Kruskal-Wallis test. Post hoc Dwass-Steele- Critchlow-Fligner test and non-parametric Spearman correlation coefficient were used additionally. Results. A statistically significant relationship between the size of the bases angle NLML and widths of the WALA alveolar processes measured at the lower canines region (p=0.042) and upper canines area (p=0.019) was found. A positive correlation between the bases angle and width of the alveolar process in areas: 6+6 (r=0.34, p=0.028), 5 + 5 (r=0.32, p=0.042), and 3+3 (r=0.45, p=0.003) was obtained. The widths of dental arches in the teeth 3-3 and 3+3 regions correlated with the vertical dimension, r=042, p=0.006; r=0.48, p=0.001, respectively. The width between WALA and FA points at 4-4 teeth area correlated negatively with NLML angle (r= -0.32, p=0.039). The evaluation of severity of dental Class III malocclusion by Angle on the right side (KL IIIP) and the left side (KL IIIL) showed statistical significance in both measurements. A positive correlation between M angle and the bones bases inclination (r=0.35, p=0.023) was stated. Conclusions. Bones bases angle NLML determines a more important role in alveolar bone transverse dimension compared with the dental arches. The bones bases inclination has an influence on the dentoalveolar compensation.
Authors and Affiliations
Piotr Buczko, Iga Szarmach, Monika Grycz, Izabela Szarmach
Keywords
Related Articles
- EP ID EP77061
- DOI -
- Views 101
- Downloads 0
Survey-based evaluation of oral hygiene habits among students of several Cracow universities – part I
Introduction. Oral health status is integrally related to the overall body health as well as general well being. Parents should implement proper hygienic habits from the earliest age to be continued over a lifetime. Asse...
Selection of patients for orthodontic therapy: Part two: Principles and practical aspects of selection of patients for orthodontic therapy
The report considers principles involved in the selection of patients for orthodontic therapy in order to offer a fair and defensible system for use on a population basis. After a critical review of established methods i...
Ponticulus posticus: radiographic findings on the posterior arch of the atlas vertebrae – review article
The ponticulus posticus is a bony arch located on the posterior arch of the atlas vertebrae. It lies in relationship with the vertebral artery. The presence of ponticulus posticus on the atlas vertebrae has been associat...
Salivary lipids – description and significance
Lipids in the human body play an important role in the physiological and pathological processes. Laboratory analysis of blood lipid parameters is an important test of health and disease. Saliva contains many organic comp...
Endodontic procedures used by dental practitioners in daily dental practice – questionnaire study
Introduction. In order to increase the effectiveness of root canal treatment, in 2006 the European Society of Endodontology prepared guidelines for endodontic treatment. However, epidemiological studies indicate that des...