The objective of this study was to compare facial groups classified according to their vertical skeletal characteristics (hypodivergent, normodivergent, and hyperdivergent) and to their respective soft tissue morphological features, particularly those relating to the lips and chin. 90 Lateral cephalometric x-rays were collected from the Orthodontic clinic at the Faculty of Dentistry, Beirut Arab University and divided into 3 equal groups based on mandibular plane angle, hypodivergent facial type (SN/MP <27°), normodivergent facial type (SN/MP between 27° and 37°), hyperdivergent facial type (SN/MP >37°). The mean upper and lower lips thickness was maximum among hypodivergent group (8.95 mm and 9.35 mm, respectively). The mean upper lip height was maximum among hyperdivergent group (11.3 mm), while lower lip height was maximum among hypodivergent group (25.32 mm). The mean procumbency of upper (PUL) and lower lips (PLL) was maximum among hypodivergent (2.08 mm and 0.87 mm, respectively). However, the mean chin thickness was maximum among hyperdivergent group (7.84 mm). Statistically significant difference among the three groups were observed only in Hypo vs Normo-divergent groups in ULT. Concerning PUL and PLL, there was a statistically significant differences between the different groups in Hypo vs Normodivergent and Hypo vs Hyperdivergent groups. It was concluded that the thickness of upper and lower lip, height of lower lip, and procumbency of both lips showed to be greater in hypodivergent facial patterns.
Objectives: The aim of this randomized clinical trial is to investigate the rate of canine retraction at different time points between piezotome-corticision assisted and conventional orthodontics. Methods: Fifteen patients were submitted for upper first premolars extraction after leveling and alignment was achieved to facilitate canine retraction. They were randomly divided into test side and control side. On the test side, the canine was retracted using piezotome-corticision assisted orthodontics, while at the control side, the canine was retracted using conventional technique. Both groups were immediately loaded with a horizontal force of 150g for canine retraction. The distance between the canine bracket hook and the first molar band hook were recorded using a digital caliper. The measurements were accomplished immediately after piezosurgery at 1,2,4,8 and 12 week. Results: There was a statistically significant difference in the average amount of canine retraction between test and control groups (P<0.05). The canine on the test side was closed 6 weeks earlier than the control side. Conclusion: Piezocision is minimal invasive which accelerate the rate of canine of retraction approximately 1.5 times faster than that of conventional method.
Objectives: The aim of this study to assess the patient perception of pain, discomfort satisfaction after piezotome-corticision assisted. Methods: Fifteen patients were submitted for upper first premolars extraction to facilitate canine retraction. They were randomly divided into test and control side. On the test side the canine was retracted using piezosurgery, while at control side without piezosurgery. Both groups were loaded with 150g for canine retraction. Pain, swelling and discomfort were evaluated at day 1, 3, 5 and 7 after piezosurgery using a questionnaire. Results: At all times, pain was greater in the test side, although the intensity of pain in the test side was in the mild range, while for day 7 there was no statistically significant difference on either sides. The swelling was statistically significant between the test and the control side at day 1 and 3, whereas there was no statistically significant difference at day 5 and 7. The discomfort was statistically significant at day 1 and 5 at the test side, while there was no discomfort at the control side. Conclusion: Patients reported only mild pain locally at the spot of precision as well as mild swelling and discomfort on test side.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.