불소는 교정용 와이어의 기계적 성질을 변화시켜 치료결과에도 영향을 줄 수 있습니다.
고농도 불소가 티타늄을 부식시킨다는 논문과도 일맥상통합니다.
따라서 치아교정환자나 임플란트 환자의 구강관리시 특별한 주의가 요구됩니다.
J Contemp Dent Pract. 2018 Mar 1;19(3):283-286.
Evaluation of the Effects of Fluoride Prophylactic Agents on Mechanical Properties of Nickel Titanium Wires using Scanning Electron Microscope.
Gupta AK1, Shukla G2, Sharma P3, Gupta AK4, Kumar A5, Gupta D6.
1
Department of Orthodontics and Dentofacial Orthopedics, Shree Bankey Bihari Dental College and Research Centre, Ghaziabad Uttar Pradesh, India, Phone: +919818758144, e-mail: drajaygupta04@gmail.com.
2
Dr. Gita Shukla Dental Clinic, Noida, Uttar Pradesh, India.
3
Department of Orthodontics and Dentofacial Orthopedics Employees' State Insurance Corporation Dental College & Hospital, Rohini, New Delhi, India.
4
Dentavista Super Speciality Dental Clinic & Orthodontic Center New Delhi, India.
5
Dental Health Centre, Ghaziabad, Uttar Pradesh, India.
6
Align Dentals, Noida, Uttar Pradesh, India.
Abstract
INTRODUCTION:
Orthodontic treatment these days is increasing in demand, and therefore, it is relatively imperative for the orthodontist to prescribe the use of fluoride-containing products, such as mouthwashes and gels, to help prevent dental caries and maintain healthy oral health. The aim of the study was to assess and evaluate the effects of fluoride prophylactic agents on mechanical properties of nickel titanium (NiTi) wires during orthodontic treatment using scanning electron microscope (SEM).
MATERIALS AND METHODS:
We used the commercially available round preformed NiTi orthodontic archwire (3M company) and three different mouthwash solutions, i.e., Phos-Flur gel (1.1% sodium acidulated phosphate fluoride, APF, 0.5% w/v fluoride, pH = 5.1; Colgate Oral Pharmaceuticals) and Prevident 5000 (1.1% sodium fluoride neutral agent, 0.5% w/v fluoride, pH = 7; Colgate Oral Pharmaceuticals). All the specimens were subjected to a three-point bending test on a universal testing machine. To observe the surface morphological changes, one wire from each group was randomly selected and observed under a SEM.
RESULTS:
It was observed that there was not much difference in the values of both modulus of elasticity and yield strength obtained after loading of stress on the wires in all the three experimental conditions. A significant difference in both modulus of elasticity and yield strength was observed during unloading of stress. Further, when the surface characteristics were observed for all the specimens using SEM images, it was observed that NiTi wires treated with Phos-Flur showed large surface defects which appeared as round, pitted areas depicting corrosion, numerous white inclusions, and overall damaged surface structure of the wire as compared with the control.
CONCLUSION:
Thus, fluoridated mouthwashes are essential to maintain good oral hygiene and decrease instance of caries in patients undergoing orthodontic treatment. The prophylactic usage of topical fluoride agents on NiTi wire seems to diminish the mechanical properties of the orthodontic wire that could significantly affect future treatment outcomes.
CLINICAL SIGNIFICANCE:
It has been proved that fluoride mouthwashes/gels do affect the structural surface qualities and strength of wires used during the orthodontic treatment irrespective of the composition of the wires. Therefore, it is the responsibility of the clinician to prescribe these prophylactic agents carefully while keeping in mind their pH so that the overall result of the treatment may not be hampered and delayed due to change in properties of the wires used.
KEYWORDS:
Fluoride mouthwashes; Mechanical properties; Nickel titanium wires Scanning electron microscope.
J Dent (Tehran). 2017 Sep;14(5):254-258.
Effect of Sodium Fluoride Mouthwash on the Frictional Resistance of Orthodontic Wires.
Geramy A1, Hooshmand T2, Etezadi T3.
1
Professor, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Orthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
2
Associate Professor, Department of Dental Materials, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
3
Assistant Professor, Department of Orthodontics, School of Dentistry, Mazandaran University of Medical Sciences, Sari, Iran.
Abstract
Objectives:
The friction between the brackets and orthodontic wire during sliding mechanics inflicts difficulties such as decreasing the applied force and tooth movement and also the loss of anchorage. Therefore, many studies have focused on the factors that affect the friction. The purpose of this study was to assess the effect of 0.05% sodium fluoride mouthwash on the friction between orthodontic brackets and wire.
Materials and Methods:
Four types of orthodontic wires including rectangular standard stainless steel (SS), titanium molybdenum alloy (TMA), nickel-titanium (NiTi) and copper-nickel-titanium (Cu-NiTi) were selected. In each group, half of the samples were immersed in 0.05% sodium fluoride mouthwash and the others were immersed in artificial saliva for 10 hours. An elastomeric ligature was used for ligating the wires to brackets. The frictional test was performed in a universal testing machine at the speed of 10 mm/minute. Two-way ANOVA was used for statistical analysis of the friction rate.
Results:
The friction rate was significantly higher after immersion in 0.05% sodium fluoride mouthwash in comparison with artificial saliva (P=0.00). Cu-NiTi wire showed the highest friction value followed by TMA, NiTi and SS wires.
Conclusions:
According to the results of the current study, 0.05% sodium fluoride mouthwash increased the frictional characteristics of all the evaluated orthodontic wires.
KEYWORDS:
Fluoride; Friction; Orthodontics; Saliva
J Orthod Sci. 2016 Oct-Dec;5(4):121-126.
Fluoride influences nickel-titanium orthodontic wires' surface texture and friction resistance.
1
Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah 21381, Saudi Arabia; Alexandria University, Alexandria, Egypt.
Abstract
OBJECTIVES:
The aim of this study was to investigate the effects exerted by the acidulated fluoride gel on stainless steel and nickel-titanium (Ni-Ti) orthodontic wires.
MATERIALS AND METHODS:
Sixty stainless steel and Ni-Ti orthodontic archwires were distributed into forty archwires used for in vitro study and twenty for in situ study. Fluoride was applied for 1 h in the in vitro experiment while it was applied for 5 min in the in situ experiment. The friction resistance of all wires with ceramic brackets before/after topical fluoride application was measured using a universal testing machine at 1 min intervals of moving wire. Moreover, surface properties of the tested wires before/after fluoride application and before/after friction test were examined by a scanning electron microscope (SEM). Dunnett's t-test was used to compare frictional resistance of as-received stainless steel wires and Ni-Ti wires to the wires treated by fluoride in vitro and in situ (P < 0.05). Two-way ANOVA was used to compare the effect of fluoride application and type of wire on friction resistance in vitro and in situ (P < 0.05).
RESULTS:
Ni-Ti wires recorded significantly high friction resistance after fluoride application when compared to stainless steel wires in vitro, P < 0.05. Fluoride application did not significantly affect the friction resistance of the tested wires in situ, P < 0.05. SEM observation revealed deterioration of the surface texture of the Ni-Ti wires after fluoride application in vitro and in situ.
CONCLUSIONS:
The in vitro fluoride application caused an increase in friction resistance of Ni-Ti wires when compared to stainless steel wires. In vitro and in situ fluoride application caused deterioration in surface properties of Ni-Ti wires.
KEYWORDS:
Fluoride; friction resistance; orthodontics; prophylaxis; surfaces
J Orthod Sci. 2015 Apr-Jun;4(2):52-6. doi: 10.4103/2278-0203.156030.
An in vitro assessment of the mechanical characteristics of nickel-titanium orthodontic wires in Fluoride solutions with different acidities.
Alavi S1, Barooti S1, Borzabadi-Farahani A2.
1
Dental Materials Research Center, Departments of Orthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
2
Department of Orthodontics, Warwick Dentistry, Warwick Medical School, University of Warwick, Coventry, NHS England (Locum Consultant Orthodontist), UK.
Abstract
OBJECTIVES:
The aim was to evaluate the in vitro effects of fluoride solutions with different acidities on load-deflection characteristics of nickel-titanium (NiTi) orthodontic wires.
MATERIALS AND METHODS:
In this study, which lasted 30 days, 36 (3 cm long, 0.016 × 0.022 inches, SENT 1622, G & H wire Company, Greenwood, Indiana, USA) NiTi wires, were divided into three experimental groups of 12 each. Two groups were subjected to 0.05 topical fluoride mouthwash with different acidities (G1, pH 4; G2, pH 6.6) for 90 s, twice a day, and kept in normal saline after that. The third group (G3, the control group) was kept in normal saline only. Load and unload forces were measured with three bracket bending test in a universal testing machine (Testometric Co, Rochdale, UK). Loading and unloading plateaus and hysteresis were also recorded. Data were then analyzed using analysis of variance and honestly significant difference Tukey at P < 0.05.
RESULTS:
During the loading phase, there was a significant difference between deflections (P < 0.001); but there was no interaction effect (P = 0.191) and no significant difference among three groups (P = 0.268). In the unloading phase, there was a significant difference between deflections (P < 0.001) and an interaction effect was also observed (P = 0.008). Further, significant differences noted among three groups (P = 0.037). only in the unloading phase, at deflections of 2.2 through 0.2 mm, significant differences between the mean force values of the G1 and G3 groups were observed (P = 0.037).
CONCLUSION:
Based on this in-vitro study, compared to neutral fluoride solution, daily mouthwash with a fluoride solution with more acidic pH of 4 affected the NiTi wires load-deflection characteristics during the unloading phase. This finding may have clinical implications and can be further validated by in-vivo studies.
KEYWORDS:
Acidity; fluoride mouthwash; nickel-titanium; orthodontic wire
J Mater Sci Mater Med. 2013 Oct;24(10):2287-92. doi: 10.1007/s10856-013-4988-0. Epub 2013 Jun 21.
Coating NiTi archwires with diamond-like carbon films: reducing fluoride-induced corrosion and improving frictional properties.
Huang SY1, Huang JJ, Kang T, Diao DF, Duan YZ.
1
Department of Orthodontics, School of Stomatology, The Fourth Military Medical University, 145 West Changle Rd., Xi'an, 710032, China.
Abstract
This study aims to coat diamond-like carbon (DLC) films onto nickel-titanium (NiTi) orthodontic archwires. The film protects against fluoride-induced corrosion and will improve orthodontic friction. 'Mirror-confinement-type electron cyclotron resonance plasma sputtering' was utilized to deposit DLC films onto NiTi archwires. The influence of a fluoride-containing environment on the surface topography and the friction force between the brackets and archwires were investigated. The results confirmed the superior nature of the DLC coating, with less surface roughness variation for DLC-coated archwires after immersion in a high fluoride ion environment. Friction tests also showed that applying a DLC coating significantly decreased the fretting wear and the coefficient of friction, both in ambient air and artificial saliva. Thus, DLC coatings are recommended to reduce fluoride-induced corrosion and improve orthodontic friction.
무불소 치아재광화 촉진재
임플란트나 교정치료환자의 구강관리(프로케어+자가케어)에 좋습니다.
1 먹어도 인체에 안전한 물질입니다
2 구강내의 세균을 흡착하여 제거하는 효과가 뛰어납니다.
3 에나멜 손상(치면의 미세 흠집)을 수복해 치아를 매끈하게 합니다.
4 치면 하방에 직접 침투하여 탈회(초기충치)를 치료합니다
5 상아세관을 봉쇄하여 시린이 증상을 완화합니다(enamelization)
6 프로케어와 자가케어를 함께할 수 있어 예방치료 효과를 극대화합니다
7 용량과 용법에 제한이 없습니다.
8 남녀노소 누구나 가능합니다.
'충치예방(치아재광화)' 카테고리의 다른 글
| 아파프로 셀프케어(자가케어), 나노 하이드록시아파타이트, 환자혜택 (0) | 2018.05.30 |
|---|---|
| 무불소 충치예방, 나노 하이드록시아파타이트 (0) | 2018.05.30 |
| 아파프로, 아파프로 나노케어 자주하는 질문, FAQ (0) | 2018.04.03 |
| 아파프로 나노케어, 베너와 포스터, 브로셔 (0) | 2018.04.02 |
| 스켈링 말고 PMTC 하세요~ 아파프로 나노케어 (0) | 2018.04.02 |
