Effect of Dietary Components on the Shear Bond Strength of Orthodontics Brackets after Thermal Aging

Introduction: The stability of orthodontic brackets throughout orthodontic treatment plays a critical role in the treatment’s effectiveness. The present in vitro study was designed to assess the impact of various dietary components on the performance of orthodontic brackets. Methods: Metal orthodontic brackets were bonded to 66 extracted anterior teeth divided into groups based on the solution type: Milk, Gatorade, Cold Coffee, and a control group using water. Each group consisted of 20 teeth except for the control group, which included six teeth. The bracketed teeth were submerged in their respective solutions for 15 minutes three times daily at different intervals to mimic an in vivo environment and were stored in artificial saliva at room temperature (23?C). The specimens underwent artificial aging through 10,000 cycles of thermocycling (representing one clinical year) between 5?C and 55?C. Shade measurements were taken using a VITA Easy Shade device, capturing the classic shade and L*, a*, and b* values. Delta E values were calculated immediately post-bonding and after 7 days, 1 month, 1, and 2 clinical years. The shear bond strength of each bracket was measured using an ultra-tester machine. Results: After two clinical years, significant differences in ΔE color values were observed across all groups, with the most substantial change noted in teeth immersed in cold coffee. Brackets submerged in milk demonstrated lower shear bond strength than other solutions, whereas the control group exhibited the highest shear bond strength (P = 0.01). Conclusion: The study indicates that dietary components significantly influence tooth color stability and the shear bond strength of orthodontic brackets, underscoring the importance of considering these factors in orthodontic treatment planning.

Effect of self-ligating bracket appliance on the periodontal tissues in patients with chronic periodontitis after orthodontic treatment

Objective:To explore the effect of self-ligating bracket appliance on the periodontal tissues in patients with chronic periodontitis after orthodontic treatment.Methods:A total of 56 patients with chronic periodontitis who were admitted in our hospital were included in the study and divided into the observation group and the control group according to different treatment protocols. The patients in the observation group were given self-ligating brackets, while the patients in the control group were given traditional brackets. The periodontal tissues and tooth motility (TM) before and after treatment in the two groups were observed and recorded. IL-1βand TNF-α levels in the gingival crervicular fluid (GCF) before and after treatment in the two groups were detected.Results:PD, CAL, SBI, and PLI after treatment in the two groups were significantly reduced, while GR was significantly elevated when compared with the control group. PD, CAL, SBI, and PLI after treatment in the observation group were significantly lower than those in the control group, while GR was significantly higher than that in the control group. TM after treatment in the two groups was significantly improved, among which the number of 0° TM was significantly increased, while the number ofⅠ°-Ⅲ°TM was significantly reduced. IL-1β and TNF-α levels in GCF after treatment in the two groups were significantly reduced when compared with before treatment. IL-1β and TNF-α levels in GCF after treatment in the observation group were significantly lower than those in the control group.Conclusions:The self-ligating brackets can effectively improve the periodontal tissues and TM in patients with chronic periodontitis, and reduce the levels of inflammatory cytokines in periodontal tissues, with an accurate efficacy.

Clinical assessment of demineralization and remineralization surrounding orthodontic brackets with FluoreCam

Objective: To determine quantitatively the amount of demineralization and the ability of commercially available products and an experimental cream to inhibit or reverse orthodontic related demineralization.Methods: A total of 20 patients who were 25–35 years old and having orthodontic treatment for 6–8 months were chosen.Caries risk assessments were done for each patient and ones with "moderate risk" were included.Patients with fixed orthodontic appliances were divided into 4 groups(5 patients each) including one control and 3 study groups.All patients used same toothpaste 2 times a day during the 3 weeks study period.Additional to the toothpaste first study group used MI Paste Plus(GC, Tokyo, Japan), second study group used Remin Pro(Voco, Cuxhaven, Germany) and third group used an experimental remineralizing cream per day for 3 weeks.Maxillary central and lateral incisors of each patient were examined by FluoreCam(Daraza Therametric Technologies, USA) device.The examinations were performed at baseline and at the end of 1st, 2nd and 3rd weeks.Results: According to the FluoreCam measurements the control group showed significant amount of demineralization at the end of 3 weeks, moreover the amount of demineralization has gradually increased in time.At the end of the study all 3 study groups showed significant amount of remineralization and the amount of remineralization for all the 3 study groups has gradually increased in time.However the amount of remineralization for 3rd study group was lesser than the 1st and 2nd study groups.The remineralization amounts for the 1st and 2 nd study groups were determined to be identical.Conclusions: This study demonstrated that demineralization is measurable around orthodontic brackets and the demineralization can be completely inhibited and/or reversed by the use of commercially available remineralization products.

Performance of Different Orthodontic Brackets after Exposure to Dietary Components: An <i>in Vitro</i>Pilot Study

Introduction: The aim of this study was to determine whether there was a significant difference in shear bond strength between metal and ceramic brackets when exposed to acidic dietary components (beverages) and to observe the chromogenic potential of each in vitro. Methods: Metal and clear orthodontic brackets were placed on extracted maxillary second premolars and exposed to select beverages three times daily for four weeks. Shade was taken using a colorimeter device at seven intervals and the shear bond strength of each bracket was recorded. Results: There was a variable change in tooth shade with respect to the various beverages in which they were submerged. Coffee and Dr. Pepper had the most pronounced change, whereas Red Bull and water produced little to none, respectively. Compared to controls, brackets submerged in coffee had the greatest reduction in shear bond strength, followed by Dr. Pepper, then Red Bull. Overall, clear brackets showed higher shear bond strength than metal brackets. Conclusion: Acidic dietary components have a negative effect on the shear bond strength of orthodontic brackets, and more pigmented beverages have a higher chromogenic staining potential.

Application of mobile photography with smartphone cameras for monitoring of orthodontic correction with dental BRACKETS

This research was to observe patients,who underwent orthodontic tooth alignment correction with dental brackets,for the purpose of early detection of white spots(early satge of caries)and dynamic measurement of distance between teeth edges based on the digital photographs taken with a smartphone Sony Xperia S.Color reading was realized taking into account the adjustment of color features of a standard ceramic surface(tile)that was selected during the dental brackets installation period,the photo of which was taken simultaneously during the dynamic observation period.The color scale RGB was transformed into CIE L*a*b scale of color measurement with regard to the correction of RGB components of image by usage of correction coefficient for calibration tile surface RGB characteristics.The expert appraisal showed sensitivity of proposed method was between 88.7%and 96.2%(the mean 93.1%)and specificity between 68.4%and 84.2%(the mean 75.4%).The positive predictive value was between 89.5%and94.0%(the mean 91.5%);and the negative predictive value was between 72.7%and 86.7%(the mean 80.6%).The measurement of the distance between teeth edges during the first 10 days following the brackets installation was carried out using a self-scalable ruler that was calibrated,according to the standard sizes of the dental bracket system components.The Android application of self-scalable ruler was developed using Java.The development of a pronounced pain syndrome was observed when the velocity of distance changes between teeth edges was rather high-0.051+0.004 mm/day.The improvement of efficiency of the suggested method is expected due to application of illumination standards during the shooting period.

External apical root resorption and the release of interleukin-6 in the gingival crevucular fluid induced by a self-ligating system

The aim of this study was to investigate the amount of external apical root resorption (EARR) and the release of interleukin (IL)-6 in the gingival crevicular fluid (GCF) in subjects treated with a low-force low-friction system. Sixty patients were assigned to two groups of thirty patients for each: one group received treatment with self-ligating brackets and the other with conventional ligated edgewise brackets. All patients were treated with extraction of the maxillary first premolars. The EARR of the maxillary central incisors was evaluated on the periapical radiographs and cephalograms, taken before and after orthodontic treatment. The GCF was also collected non-invasively from the mesial and distal sides of central incisors by using filter paper strips before and after orthodontic treatment. Enzyme-linked immunosorbent assay (ELISA) kits were used to determine the IL-6 levels in the GCF samples. A significant difference was found in the amount of EARR between the patients with self-ligating brackets and conventional brackets. The mean amount of EARR was significantly lower for self-ligating brackets than conventional brackets (p < 0.05). The GCF levels of IL-6 for the patients with self-ligating brackets appliance were significantly lower than for those with the conventional brackets (p < 0.05). These results show that the mean amount of EARR and the GCF levels of IL-6 were significantly lower in the patients treated using low-force low-friction appliances than conventional brackets. Therefore, self-ligating brackets may be a useful system for reducing inflammation and EARR.

无托槽隐形矫治器治疗骨性Ⅱ类错[牙合]的疗效分析

目的 探讨无托槽隐形矫治器治疗骨性Ⅱ类错[牙合]的疗效。方法 以2021年7月至2023年10月在郑州大学第一附属医院进行正畸治疗的87例骨性Ⅱ类错[牙合]患者为研究对象开展回顾性分析,根据应用矫治器的不同分为传统组(应用传统固定矫治器治疗,n=44)和隐形组(应用无托槽隐形矫治器治疗,n=43)。比较两组矫治效果[采用美国正畸专家认证委员会(ABO)评级系统评定]、侧貌美学指标、牙周指数[探诊深度(PD)、菌斑指数(PLI)及牙龈指数(GI)]及龈沟液炎症因子[白细胞介素-1β(IL-1β)和可溶性细胞间黏附分子1(sICAM-1)]水平。结果 矫治后,隐形组ABO评级系统中的8项分值及总分与传统组比较,差异无统计学意义(P>0.05);矫治后,两组颌凸角、上下中切牙角、U1-PP、FMA、UL-EP、TLL-EP均优于矫治前(P<0.05),其中隐形组上下中切牙角、FMA优于传统组(P<0.05);矫治后,隐形组PD、PLI、GI及龈沟液IL-1β、sICAM-1水平均低于传统组(P<0.05)。结论 无托槽隐形矫治器可有效矫正骨性Ⅱ类错[牙合]畸形,提高患者侧貌美观度,并能减少对牙周组织的损害。

自锁托槽矫治器联合口腔正畸在牙颌畸形患者的应用效果评价

目的评价自锁托槽矫治器联合口腔正畸在牙颌畸形患者的应用效果。方法回顾性分析我院2020年1月~2023年1月进行口腔正畸的牙颌畸形患者102例,按治疗方法分为金属托槽组(n=51)和自锁托槽组(n=51)。金属托槽组采用金属托槽矫治器治疗,自锁托槽组采用自锁托槽矫治器治疗。对比2组治疗效果、治疗前后牙周指数[牙龈指数(gingival index,GI)、龈沟出血指数(Gingival sulcus bleeding index,SBI)]、龈沟液生化指标[谷草转氨酶(aspartate transaminase,AST)、碱性磷酸酶(alkaline phosphatase,ALP)]水平。结果自锁托槽组总有效率96.08%(49/51)较金属托槽组76.47%(39/51)高(P<0.05);治疗后与金属托槽组比较,自锁托槽组TNF-α、IL-1β低(P<0.05);治疗后与金属托槽组比较,自锁托槽组GI、SBI低(P<0.05);治疗后与金属托槽组比较,自锁托槽组AST、ALP低(P<0.05)。结论自锁托槽矫治器联合口腔正畸在牙颌畸形患者中的应用效果显著,能减轻龈沟液炎症,降低相关生化指标水平,改善患者牙周指数。

不同镍钛弓丝对拔牙和非拔牙矫治患者正畸排齐效率和疼痛感知程度的影响

目的:探讨应用低摩擦自锁托槽的拔牙和非拔牙矫治患者中超弹性镍钛弓丝(SENT)与热激活镍钛弓丝(HANT)对下前牙初期排齐效率和患者疼痛程度的影响,为正畸临床中最适弓丝的选择提供依据。方法:将80例接受固定正畸治疗并应用自锁托槽的40例拨牙矫治患者(拔牙矫治组)和40例非拨牙矫治患者(非矫治拔牙组)随机分配到SENT亚组和HANT亚组,由同一名操作者将0.014英寸平直弓丝完全入槽。患者、操作者和数据测量人员均实行盲法。观察各组患者初始弓丝的临床排齐效率并计算患者Little’s指数,记录各组患者在初粘矫治器4 h后及矫治第1周的每天早饭前视觉模拟量表(VAS)评分和疼痛感知情况,对患者初始Little’s指数、性别和年龄进行多元回归分析,分析影响患者疼痛的影响因素。结果:拔牙矫治组和非拔牙矫治组患者年龄、性别和初始Little’s指数比较差异无统计学意义(P>0.05)。治疗4周后,非拔牙矫治组中HANT和SENT亚组患者的Little’s指数均较治疗前降低,但组间比较差异无统计学意义(P>0.05);与非拔牙矫治组中SENT亚组比较,非拔牙矫治组中HANT亚组患者Little’s指数降低(P<0.05);拔牙矫治组中HANT和SENT亚组患者治疗前后的Little’s指数比较差异无统计学意义(P>0.05)。患者初粘矫治器后的疼痛感在第1天达到峰值,随后逐渐降低至基础水平;在拔牙矫治组和非拔牙矫治组患者中,SENT和HANT亚组患者表现出相同的疼痛变化模式;SENT和HANT亚组患者各时间点VAS评分平均值和最高疼痛强度评分比较差异均无统计学意义(P>0.05)。弓丝类型对疼痛程度无明显影响,时间明显影响患者的疼痛程度。多元回归分析,拔牙矫治组患者初始Little’s指数与VAS最高评分间有明显相关性(b=0.359,P=0.033),性别和年龄均不会对2组患者疼痛程度产生影响。结结论论:应用低摩擦自锁托槽正畸治疗时,非拔牙矫治组患者使用0.014英寸HANT弓丝的初始排齐效率优于0.014英寸SENT弓丝;SENT弓丝和HANT弓丝对正畸患者初始疼痛程度无影响。

数字化间接粘接技术在正畸托槽定位中的应用进展

正畸托槽的定位直接影响着矫治结束时牙齿的位置和矫治的最终效果,尤其是现在直丝弓矫治技术盛行,托槽位置的精确定位显得尤为重要。传统间接粘接技术因材料学等因素的限制,在粘接准确性、制作流程上相比与直接粘接无明显优势,所以临床应用有限。随着当今数字化技术的发展,由三维打印技术获得的间接粘接转移托盘使间接粘接技术得到了优化和完善。该文将围绕数字化定位间接粘接技术作一综述,为临床提供参考。

不同矫治技术在口腔正畸治疗中对患者牙周指数及美观度的影响比较

目的:探讨传统固定及无托槽隐形矫治技术对口腔正畸牙周指数及患者美观度的影响。方法:选取2019年4月-2021年4月于笔者医院行正畸治疗的106例患者作为研究对象,依据治疗方式不同分为观察组(n=51)与对照组(n=55)。两组患者入院后均行口腔卫生宣教,并指导患者学习改良Bass刷牙法,患者治疗期间均使用相同的牙膏及牙刷,对照组患者以传统固定矫治技术治疗,观察组患者以无托槽隐形矫治技术治疗。对比两组患者正畸治疗时间、倾斜牙扶正时间及扭转牙转正时间;对比两组患者治疗前后牙龈指数(Gingival index,GI)、菌斑指数(Plaque index,PLI)、龈沟探诊深度(Sulcus probing depth,SPD)、龈沟出血指数(Sulcus bleeding index,SBI)及龈沟液内肿瘤坏死因子-α(Tumor necrosis factor-α,TNF-α)、白细胞介素-1β(Interleukin-1β,IL-1β),评估两组患者治疗后满意度。结果:观察组正畸治疗时间、倾斜牙扶正时间、扭转牙转正时间显著短于对照组(P<0.05)。两组治疗后GI、PLI、SBI水平显著高于治疗前(P<0.05),且观察组GI、PLI、SBI水平显著低于对照组(P<0.05)。两组治疗后龈沟液TNF-α、IL-β水平显著低于治疗前(P<0.05),且观察组龈沟液TNF-α、IL-β水平显著低于对照组(P<0.05)。观察组治疗后美观程度评分显著高于对照组(P<0.05)。结论:相对于传统固定矫治技术,无托槽隐形矫治技术应用于正畸治疗中可缩短正畸治疗时间,且矫治器对正畸患者的牙周健康影响轻微,具有较好的美观度,患者满意度高。

无托槽隐形矫治器与固定矫治器对口腔正畸治疗患者口腔微生物菌群和龈沟液sICAM-1、MMP-8水平的影响

目的探究无托槽隐形矫治器与固定矫治器对口腔正畸治疗患者口腔微生物菌群和龈沟液可溶性细胞间黏附分子-1(sICAM-1)、基质金属蛋白酶-8(MMP-8)水平的影响。方法前瞻性纳入2020年2月至2023年3月在山西省儿童医院接受正畸治疗的106例患者为研究对象,按照随机数字表法对患者分为对照组和研究组,每组各53例。对照组采用固定矫治器,研究组采用无托槽隐形矫治器。比较两组患者矫正前和矫正后3个月口腔微生物菌群情况(卟啉单胞菌、具核梭杆菌、福塞斯坦氏菌和中间型普里沃菌)、牙周健康情况(牙龈指数、龈沟出血指数、菌斑指数及龈沟探诊深度)、龈沟液sICAM-1和MMP-8水平、患者满意度及并发症情况。结果矫正后3个月,两组各菌群水平均较矫正前升高,但研究组卟啉单胞菌、具核梭杆菌、福塞斯坦氏菌、中间型普里沃菌水平分别为0.29±0.06、0.33±0.06、0.33±0.08、0.27±0.06,均低于对照组(0.35±0.07、0.44±0.08、0.45±0.09、0.37±0.09),差异均有统计学意义(P<0.05)。两组组内矫正后3个月的牙龈指数和龈沟探诊深度与矫正前比较,以及组间矫正后3个月的牙龈指数和龈沟探诊深度比较,差异均无统计学意义(P>0.05);两组矫正后3个月的龈沟出血指数及菌斑指数均较矫正前升高,且研究组出血指数及菌斑指数分别为(0.65±0.06)、(0.99±0.12)分,均低于对照组[(0.72±0.08)、(1.23±0.15)分],差异均有统计学意义(P<0.05)。矫正后3个月,两组龈沟液sICAM-1水平均较矫正前升高,MMP-8水平均较矫正前降低,研究组龈沟液sICAM-1、MMP-8水平分别为(166.26±21.02)、(22.12±3.39)ng/mL,均低于对照组[(178.52±23.05)、(26.77±4.12)ng/mL],差异均有统计学意义(P<0.05)。研究组患者矫正后3个月的咀嚼、固定、美观、舒适性、方便程度、言语功能的满意度均高于对照组,差异均有统计学意义(P<0.05)。研究组患者牙龈红肿、牙龈萎缩、局部拥挤等总并发症发生率为7.55%,低于对照组(22.64%),差异有统计学意义(P<0.05)。结论相比固定矫治器矫正,采用无托槽隐形矫治器矫正对口腔微生物菌群和龈沟液中sICAM-1、MMP-8水平具有积极影响,能够提高患者的满意度,降低牙周疾病的发生。

隐适美矫治器与Damon Q自锁托槽非拔牙矫治牙列拥挤的临床疗效比较

目的:探讨隐适美矫治器与Damon Q自锁托槽非拔牙矫治牙列拥挤患者的临床疗效。方法:选取2019年1月-2022年1月在笔者医院完成非拔牙矫正治疗的100例牙列拥挤患者为研究对象,根据不同矫治方式分为隐适美组(使用隐适美矫治器行正畸治疗)52例和Damon Q组(使用Damon Q自锁托槽矫治器行正畸治疗)48例。对比分析两组患者牙弓宽度指标(尖牙间宽度、第一前磨牙间宽度、第一磨牙间宽度),牙周健康指标[牙龈指数(Gingival index,GI)、菌斑指数(Plaque index,PLI)、龈沟出血指数(Sulcus bleeding index,SBI)],龈沟液炎症指标[白介素-1β(Interleukin-1β,IL-1β)、肿瘤坏死因子-α(Tumor necrosis factor-α,TNF-α)],以及口腔相关生活质量评分。结果:治疗结束后,两组患者牙弓宽度均显著增加(P<0.05),但两组比较差异无统计学意义(P>0.05)。治疗后,两组患者GI、PLI、SBI、IL-1β、TNF-α指标均显著高于治疗前,且Damon Q组治疗1个月、2个月、3个月后各指标均高于隐适美组(P<0.05)。治疗期间,两组患者OHIP-14评分均高于治疗前,且Damon Q组治疗3个月、6个月后各指标评分均高于隐适美组(P<0.05);但治疗结束后,两组患者OHIP-14评分均低于治疗前(P<0.05)。结论:隐适美矫治器和Damon Q自锁托槽非拔牙矫治牙列拥挤均有良好效果,可改善牙弓宽度,对患者牙齿口腔卫生影响较小,但隐适美矫治器更易保证牙周健康,控制牙周疾病的发生,值得临床推广应用。

生长发育高峰期均角骨性Ⅱ类错[牙合]患者使用无托槽隐形矫治器前导下颌的临床效果

目的评估处于生长发育高峰期的均角骨性Ⅱ类错[牙合]患者无托槽隐形矫治器前导下颌的临床治疗效果。方法选取2020年1月至2022年12月合肥市口腔医院收治的86例生长发育高峰期均角骨性Ⅱ类错[牙合]患者作为研究对象,按照随机数字表分为对照组(43例)、观察组(43例)。对照组采取Twin-block矫治器治疗,观察组使用无托槽隐形矫治器前导下颌,比较两组矫治效果,评估无托槽隐形矫治器前导下颌的临床效果。结果矫治后,观察组鼻根点到上齿槽座点连线与前颅底平面夹角(SNA)、鼻根点到下齿槽座点连线与前颅底平面夹角(SNB)、SNA、SNB的差值(ANB角)、上齿槽座点和下齿槽座点在功能性[牙合]平面垂足间距离(Wits值)、Co点到Gn点的距离(Go-Gn)、上中切牙长轴与SN平面交线之后下角(U1-SN)、上下前牙覆[牙合](OB)、上下前牙覆盖(OJ)、下唇凹点至H线的垂直距离(Si-H)、牙齿咬合力、咀嚼效率均高于对照组,差异有统计学意义(P<0.05);观察组下颌平面角(FH-MP)、上颌中切牙长轴与下颌中切牙长轴的夹角(U1-L1)、下颌最突切牙切缘到下颌平面的垂直距离(L1-MP)、下颌中切牙切缘至NB连线的垂直距离(L1-NB距)、上齿槽座点至软组织面平面的垂直距离(A-NPo)低于对照组,差异有统计学意义(P<0.05)。结论无托槽隐形矫治器前导下颌应用于生长发育高峰期均角骨性Ⅱ类错[牙合]患者,治疗期间所取效果显著,对于改善上下颌骨形态、牙齿咬合力、咀嚼能力具有突出效果,同时有效改善上下颌骨矢状向关系及软组织侧貌。

3D打印无托槽隐形矫治器与固定矫治器在口腔正畸治疗患者中的应用效果比较

目的比较3D打印无托槽隐形矫治器与固定矫治器在口腔正畸治疗患者中的应用效果。方法以我院2019年4月至2021年4月收治的86例口腔正畸治疗患者为研究对象,根据随机数字表法将其分为对照组(n=43,固定矫治器)和研究组(n=43,3D打印无托槽隐形矫治器)。比较两组的临床疗效、龈下致病菌检出情况、血清指标和口腔功能。结果研究组的治疗总有效率显著高于对照组(P<0.05)。治疗后,研究组的牙龈卟啉单胞菌、具核梭杆菌、变异链球菌、福赛坦氏菌检出率低于对照组(P<0.05)。治疗后,研究组的前列腺素E2(PGE2)、白细胞介素-1β(IL-1β)、可溶性细胞间黏附分子-1(sICAM-1)、基质金属蛋白酶-8(MMP-8)水平均低于对照组(P<0.05)。治疗后,研究组的咀嚼效能、最大咬合力和咬合速率显著高于对照组(P<0.05)。结论相较于固定矫治器,3D打印无托槽隐形矫治器对口腔正畸治疗患者口腔功能影响小,且能改善口腔菌群及血清指标,有助于获得良好的矫治效果。

分析口腔正畸患者采用无托槽隐形矫治技术治疗效果和舒适度

目的探究并分析无托槽隐形矫治技术治疗在口腔正畸患者治疗中的应用及其对治疗效果和舒适度的影响情况。方法通过选取2021-2023年该院收治的口腔正畸患者,经筛选后选择60例符合标准的患者作为本次研究的目标,患者经随机分组平分为两组各30例,对其中一组患者采用传统固定矫治术治疗并标为对照组,另一组患者视为观察组并采用无托槽隐形矫治技术治疗方法。对不同治疗操作下两组口腔正畸患者的临床有效水平、牙周健康情况、患者舒适情况、治疗满意情况进行对比分析。结果对比患者间的治疗效果差异,得到观察组患者在无托槽隐形矫治技术治疗操作下临床有效率获得了更加有效的提升(P<0.05);观察组治疗后的牙周健康情况具有更好的表现(P<0.05);观察组患者在治疗中拥有更好的舒适情况(P<0.05);观察组患者对于治疗操作的过程更加的满意(P<0.05)。结论无托槽隐形矫治技术治疗的应用在口腔正畸患者治疗中具有多方面的积极作用,对于提升治疗效果,满足患者治疗舒适需求等方面都有良好的帮助效果,是临床上对于口腔正畸患者治疗的优秀之选。

3种粘接剂分别粘接金属托槽至抛光及上釉锆瓷的粘接强度

目的:研究3种粘接剂对抛光及上釉锆瓷与正畸金属托槽粘接强度和耐久性的影响。方法:选用2种通用型粘接剂Single Bond Universal(SBU)和Prime&Bond Universal(PBU),以TransbondTMMIP(TM)为对照分别将抛光组、上釉组锆瓷与上颌中切牙金属托槽粘接,试样共6组(n=20)。水浴或水浴+冷热循环储存后测试全部试件剪切粘接强度(SBS),分析断裂形态以及粘接剂残留指数(ARI)。结果:粘接剂(P<0.001)和储存条件(P<0.001)显著影响锆瓷与托槽的剪切粘接强度;抛光或上釉(P=0.09)组间无统计学差异。SBU在各组中都表现出较强的粘接强度和较低的ARI,3种粘接剂间的ARI分数存在显著差异(P<0.001)。结论:粘接金属托槽与抛光及上釉锆瓷时,SBU较PBU和TM有更好的粘接性能。

3D数字化正畸在成人正畸治疗中的应用效果

目的探究三维(3D)数字化正畸在成人正畸治疗中的应用效果。方法选取43例接受正畸治疗的患者作为研究对象。其中22例患者接受了3D数字化正畸治疗记为3D组,21例患者接受了常规舌侧托槽黏接记为常规组。比较2组患者临床效果、上、下尖牙宽度、磨牙宽度、利特尔(Little)指数、拥挤度、Bolton值、美学效果。结果3D组托槽脱落发生率低于常规组(P<0.05),但2组患者吻合精密度、黏接定位准确方面比较,差异无统计学意义(P>0.05)。3D组患者上颌尖牙宽度、上颌磨牙宽度、上颌Little指数、下颌尖牙宽度、下颌磨牙宽度、下颌Little指数大于常规组,覆颌、覆盖、医师椅旁操作时间少于常规组(P<0.05)。3D组上列牙拥挤度、下列牙拥挤度、前牙Bolton值、全牙Bolton值小于常规组(P<0.05)。3D组鼻唇角、颏沟倾角、上唇长、上唇厚大于常规组(P<0.05)。结论3D数字化正畸用于成人正畸治疗中效果明显,托槽固定准确且不易脱落,椅旁操作时间较短,可明显改善侧貌美观。

无托槽隐形矫治对正畸治疗患者牙周指数的影响及其美学效果分析

目的:探讨无托槽隐形矫治技术对正畸治疗患者牙周指数的影响及其美学效果。方法:选取2020年9月-2022年9月华北医疗健康集团邢台总医院收治的102例正畸治疗患者作为研究对象,采用随机数字表法分为对照组(51例)和观察组(51例)。对照组给予传统固定矫治术,观察组给予无托槽隐形矫治术,治疗后随访6个月。比较两组患者的治疗效果,治疗前、治疗24 h后的口腔咬合功能及牙周指数,治疗前及随访6个月后的龈沟液中因子水平、牙齿美学效果,以及随访6个月后的正畸矫治后满意度。结果:治疗后6个月随访,观察组总有效率96.08%,高于对照组的84.31%(P<0.05);与治疗前比较,治疗24 h后两组咀嚼次数、咀嚼效能及最大咬合力均降低,但观察组高于对照组(P<0.05);治疗后两组牙龈指数、龈沟出血指数及菌斑指数均升高,但观察组低于对照组(P<0.05)。与治疗前比较,治疗后6个月随访两组龈沟液天门冬氨酸转氨酶、碱性磷酸酶、白细胞介素-1β、肿瘤坏死因子-α水平均升高,但观察组低于对照组(P<0.05)。与治疗前比较,治疗后6个月随访两组Ⅰ类牙齿美学效果的患者占比均升高,且观察组高于对照组;观察组Ⅱ类牙齿美学效果及两组Ⅲ类牙齿美学效果的患者占比均降低,且观察组Ⅱ类牙齿美学效果的患者占比低于对照组(P<0.05)。治疗后6个月随访,观察组咀嚼功能、固定功能、舒适性、语言功能、修复体形态、修复体与邻牙协调程度满意度评分均高于对照组(P<0.05)。结论:无托槽隐形矫治技术可有效降低患者牙周指数并改善口腔咬合功能障碍,改善正畸治疗患者龈沟液相关因子水平,提高牙齿美学效果,进一步提高治疗效果与患者满意度。

电话回访对青少年患者固定矫治初期托槽脱落率的影响

目的:探讨在青少年患者固定矫治初期电话回访对于托槽脱落率的影响。方法:选取2020年6月-2021年6月于深圳市龙华区人民医院进行固定矫治的160例青少年患者为研究对象,共粘接托槽3200颗,依据初次安放矫治弓丝之后是否进行电话回访分为干预组和对照组,每组80例。干预组患者在第1~6个月每个月固定时间给予2次电话回访,进行矫治后注意事项宣教,记录患者每月复诊时托槽脱落情况,并比较分析。结果:矫治后1~2个月,干预组托槽脱落率明显低于对照组,差异有显著统计学意义(P<0.01),第3个月差异具有统计学意义(P<0.05),第4~6个月托槽脱落率差异不明显,两组中男性患者正畸初期托槽脱落率均高于女性患者(P<0.05)。结论:青少年患者固定矫治初期,男性患者托槽脱落率相对更高;进行电话回访口腔正畸宣教,能够明显减少托槽脱落率。