8 research outputs found
The Effect of Low-Level Laser Therapy on the Acceleration of Orthodontic Tooth Movement
In clinical practice, Low-Level Laser Therapy (LLLT) is widely used. The main aim of this review is to assess the effectiveness of LLLT on accelerating tooth movement in human subjects. The PRISMA checklist was utilized as a guideline to carry out this systematic review. The electronic databases were searched from Google Scholar (2014-2018) and PubMed, and comprehensive research on this topic was also manually conducted. Therefore, 76 Randomized Clinical Trials (RCT) or Controlled Clinical Trials (CCT) articles were selected. After screening studies, consequently, ten trials met the inclusion criteria. Eight out of ten studies showed LLLT has a significant impact on the acceleration of orthodontic tooth movement, and there was no statistically significant difference in the rate of tooth movement between the laser group and the control group in the two remaining studies. Furthermore, five out of ten articles showed that LLLT has no adverse effects. Although we have some degree of understanding from a cellular point of view to low-level laser therapy effects, we still do not know whether this cellular level changes have any effect on clinical acceleration of the orthodontic tooth movement. The results are inconclusive and cannot be generalized to the public community; therefore, well-structured studies are required
The therapeutic effects of chamomilla tincture mouthwash on oral aphthae: a randomized clinical trial
Introduction: Recurrent aphthous stomatitis (RAS) is a common clinical condition producing painful ulcerations in
the oral cavity. However, there has been no optimal therapeutic approach. Topical and systemic steroids commonly
prescribed for the condition have local and systemic side-effects. Recently, there is growing tendency toward herbal
medication in the modern society. The objective of this study was to assess the efficacy of a chamomilla mouth rinse
on reducing the signs and symptoms of aphthous lesions in comparison with a placebo mouth rinse.
Material and Methods: A randomized, triple-blind, placebo-controlled trial was performed on 36 patients, from
cases diagnosed with RAS, attending the Department of Oral Medicine, Mashhad University of Medical Sciences.
They were randomly divided into two groups: the intervention group(A), receiving chamomilla mouth rinse, and
the control group (B) receiving a placebo rinse. The ability of the solution to control the pain and burning sensation
and the number and size of the ulcers were evaluated.
Results: The number of ulcers in the 3
rd
visit (four days after treatment) showed a significant difference between
the groups (
P
<0.001). The pain and burning sensation (VAS) was reduced significantly in the test group in the 2
nd
(
p
=0.001),3
rd
and 4
th
visit (
P
<0.001).
Conclusions: Chamomilla mouth rinse was effective in the treatment of RAS, controlling the pain and burning
sensation without producing any adverse side effects and can be advised as an alternative RAS treatment
Low Level Laser Therapy (LLLT) for Orofacial Pain
Low-power lasers are a group of lasers with a power less than 500 mW and unlike high-power lasers they have no effect on tissue temperature; they produce light-dependent chemical reactions in tissues. The purpose of this study was to review the clinical applications of these lasers and their success rate in different studies in orofacial pains. The articles with the key word “low level laser therapy” were extracted from pubmed. Clinical trials, meta-analysis, randomized clinical trials, and review articles were selected. Related articles to orofacial region were gathered and selected from the search results and carefully reviewed. Laser therapy may affect many cellular and sub-cellular processes, although exact mechanism has not been well-defined yet. Articles had different points of views as mentioned in the context of this article. Low level laser therapy was effective in orofacial pain relief in most studies, but the use of laser remains controversial. These lasers have analgesic features, and it is according to these features they have been used in the treatment of orofacial pain, Including myofacial pain, mucositis, facial myalgia, temporomandibular joint disorders and neuralgia. It seems that laser therapy can be considered as an alternative physical modality in treatment of orofacial pain
The effect of pregnancy on orthodontic tooth movement in rats
Introduction: The purpose of this study was to investigate the effect of pregnancy on orthodontic tooth movement
in Wistar rats.
Material
and Methods: Forty eight female three-month old Wistar rats with an average weight of 250
±25 g
r were
selected and randomly divided into two experimental (pregnant) and control groups (non-pregnant). Maxillary
central incisors were tipped distally by insertion of springs exerting 30g force. Two, seven and fourteen days
after spring insertion animals were sacrificed. Then the mesioincisal distance between maxillary incisors were
measured. Subsequently, histological sections were prepared to count osteoclasts under a light microscope. The
data on the extent of orthodontic tooth movement, and the number of osteoclasts were analyzed by independent
sample t-test.
Results: The results indicated that 2,7 and 14 days after force application there was no significant difference in
orthodontic tooth movement between experimental and control groups (p>0.05). The number of osteoclasts were
significantly lower in the experimental group 7 and 14 days after spring insertion (p<0.05).
Conclusion: Pregnancy may decrease the amount of tooth movement in the linear phase but it is not statistically
significant. The number of osteoclasts is significantly decreased during pregnancy
The effect of oral contraceptives on orthodontic tooth movement in rat
Introduction: The purpose of this study was to investigate the effect of ethinyl estradiol/norgestrel ? used in some oral contraceptives- on orthodontic tooth movement in Wistar rats. Material and Methods: Forty eight female three-month old Wistar rats with an average weight of 250?25gr were divided into two experimental and control groups. One week prior to appliance insertion and during the appliance therapy period, 100 mcg/kg/day of ethinyl estradiol and 1mg/kg/days of norgestrel were administered to the experimental group by gavage; meanwhile the control group received an equivalent volume of Sodium Chloride 0.9 % (Saline). Maxillary central incisors were tipped distally by insertion of springs exerting 30g force. Two, seven and fourteen days after spring insertion animals were sacrificed. The mesioincisal distance between maxillary incisors were measured. Subsequently, histological sections were prepared for histomorphometric studies. Results: 14 days after force application the orthodontic tooth movement was significantly lower in the experimental group (p<0.05). The number of osteoclasts were significantly lower in the experimental group 2, 7 and 14 days after spring insertion (p<0.05). Conclusion: Ethinyl estradiol/norgestrel (oral contraceptives) can significantly decrease the amount of tooth movement in the linear phase
Coronally advanced flap in combination with acellular dermal matrix with or without enamel matrix derivatives for root coverage
Cephalometric evaluation of soft tissue changes after extraction of upper first premolars in class II div 1 patients
Introduction: Tooth extraction to provide sufficient space, or camouflage of underlying skeletal problems is quite
common in orthodontics. The present study evaluated soft tissue changes after upper first premolars extraction in
class II div 1 patients.
Material and Methods: 20 cases (15 females, 5 males), with a mean age of 17.8±2.9 years with class II div1 malocclusion and normal vertical height, who needed upper first premolars extraction were selected. Pre- and post-
treatment lateral cephalometric radiographs were digitized. Image analysis was conducted by View Box 3.1.1
software. Paired t-test was used for comparison of pre- and post-treatment results.
Results: The relationship of upper and lower lip to E-line and B-line had significant reduction. Dental variables
of U1-NA(mm), U1-NA(°), overjet and overbite showed statistically significant reduction. Interincisal angle had
significant increase. There were no significant difference in lower incisor variables and skeletal variables like SN-
GoGn and FMA.
Conclusions: Extraction of upper first premolars in patients with class II div 1 malocclusion resulted in normal
position of lips as presented by Holdaway, Legan and Ricketts which play a role in aesthetic profile. However, the
amount of lip retraction was different from patient to patient
The Effect of Carbon Dioxide Laser on Aphthous stomatitis Treatment: A Double-Blind Randomized Clinical Trial: Carbon Dioxide Laser and Aphthous stomatitis
Introduction: This randomized clinical trial was designed to investigate the effect of carbon dioxide laser on the treatment of minor recurrent aphthous stomatitis (miRAS) as a painful and common oral ulcer.Methods: Fifteen patients with miRAS entered into this study after compliance with the inclusion and exclusion criteria. The patients were assigned to three groups of pulsed CO2 laser, continuous CO2 laser, and control. A pulsed CO2 laser with a power of 261 W and pulse duration of 180 microseconds and continuous CO2 lasers with the power of 1 W and radiation duration of 5-10 seconds were used. In the control group, topical triamcinolone ointment of 0.1% was used. The degree of pain was measured using the visual analogue scale (VAS). The patients were evaluated in terms of pain intensity before and immediately after the treatment and at follow-up hours, 12, 24, 48, and 72 hours after the intervention, and changes in the size of the ulcers were measured before the treatment and on third, fifth, and seventh days.Results: The effect of CO2 laser with pulsed and continuous radiation on the pain intensity of aphthous lesions, immediately after the treatment and at subsequent follow-up hours were similar and even better than the control group (P<0.05). All three treatments had a similar effect on the size of the ulcer, which was not statistically significant (P>0.05).Conclusion: The results of this randomized controlled trial (RCT) showed that the carbon dioxide laser, whether with pulsed radiation or continuous radiation compared to the control group, had a better impact on the pain relief of aphthous lesions