ABSTRACT
BACKGROUND: The extraction of teeth for orthodontic purpose has always been a controversial subject in the speciality. The aesthetics impact of the soft-tissue profile might play a key role in deciding on premolar extraction or non-extraction (NE) treatment, particularly in borderline patients. The purpose of this cephalometric study was to examine the soft-tissue treatment effects of Class II Division 1 malocclusion undergoing extraction of all first premolars in comparison with patients undergoing treatment with a NE approach. MATERIALS AND METHODS: Hundred post-pubertal female patients of Class II Division 1 malocclusion were selected. Group 1, treated with four first premolar extractions, consisted of 50 female patients with a mean age of 14 years 1 month. Group 2, treated without extractions, consisted of 50 patients with a mean age of 13 years 5 months. Pre-treatment and post-treatment lateral cephalograms of the patients were obtained. The pre-treatment and post-treatment stage comparison and the intergroup comparison of the treatment changes were conducted between extraction and NE groups of Class II malocclusion samples with t tests. The levels of significance tested were P < 0.05 and P < 0.01. RESULTS: The main soft-tissue differences between the groups at the end of treatment were a more retruded lower lip and a more pronounced lower labial sulcus in those patients subjected to extraction. CONCLUSION: In Class II Division 1 patients, the extraction or NE decision, if based on sound diagnostic criteria, seems to have no systematic detrimental effects on the facial profile.
ABSTRACT
The orthodontic treatment of a young adolesent female with a high Angle Class II Division 1 malocclusion is presented. Successful treatment required a careful diagnosis, specific planning, and efficient biomechanical control of the force systems to correct the disharmony in the vertical and horizontal dimensions. En masse retraction of the six maxillary anterior teeth was done via a Kalra simultaneous intrusion and retraction archwire. Precise mechanics with excellent vertical control made it possible to successfully correct the malocclusion without undesirable sequelae.
Subject(s)
Malocclusion, Angle Class II , Orthodontic Anchorage Procedures , Dental Occlusion , Humans , Malocclusion , Malocclusion, Angle Class II/therapyABSTRACT
INTRODUCTION: Skeletal age had been assessed by comparison between maturation of hand-wrist with stages of cervical vertebrae or canine calcification stages in past and this had been closely related to craniofacial growth. The importance of pubertal growth spurt in various types of orthodontic therapies is already established. AIMS AND OBJECTIVES: Hence, this study was aimed to evaluate the relationship of skeletal maturity by hand-wrist with cervical vertebral maturation indicators and canine calcification stages. MATERIALS AND METHODS: The study consisted of randomly selected 90 children from Lucknow population with 45 males (age range 10-13 years) and 45 females (age range 9-12 years). Lateral Cephalogram, hand-wrist x-ray, and periapical x-rays of maxillary and mandibular right canines were taken. STATISTICAL ANALYSIS: Mean, standard deviation was calculated of different groups. Correlation was made among cervical vertebral maturation, hand wrist maturation, and canine calcification stages at various age groups. RESULTS: There was strong correlation between skeletal maturation indicator and cervical vertebral maturation indicator for both male (0.849) and female (0.932), whereas correlation between skeletal maturation indicator and canine calcification was good for both male and female (0.635, 0.891). CONCLUSION: It was concluded that cervical vertebral maturation indicator and canine calcification stages can also be used for assessing skeletal maturity.
