成人骨性反He畸形的手术前后正畸

目的：以本院近期收治１０例骨性反Ｈｅ所患者为例,介绍采用正畸－正颌手术联合治疗的手术前后正畸及术前的准备工作。方法：正畸主要是去代偿,矫正上下颌前牙唇舌倾斜,后牙的颊舌倾斜,排齐牙齿,协调上下牙平整Ｈｅ曲线,建立正颌术前良好的牙Ｈｅ关系。术前准备主要是;术前电脑模拟手术,模拟外科,Ｈｅ板制作 。     

成人严重骨性Ⅲ类错畸形手术前后的正畸治疗

目的:研究成人严重骨性Ⅲ类错畸形在正颌外科治疗的术前与术后正畸的特点及难点。方法:成人严重骨性Ⅲ类错病例35例,对该类畸形的临床特点、正颌手术前后正畸治疗方法和注意事项进行分析研究。结果:术前正畸治疗必须完成个别牙齿错位的调整,纠正牙弓形态与宽度的不调和牙齿代偿的去除;术后正畸的主要目的是牙弓内残留间隙的关闭和咬合关系的进一步精细调整。结论:只有完善的术前、术后正畸治疗与正颌外科手术相互配合,才能较好地完成成人严重骨性Ⅲ类错的临床治疗。     

成人严重骨性Ⅲ类错(牙合)畸形手术前后的正畸治疗

目的：研究成人严重骨性Ⅲ类错耠畸形在正颌外科治疗的术前与术后正畸的特点及难点。方法：成人严重骨性Ⅲ类错胎病例35例，对该类畸形的临床特点、正颌手术前后正畸治疗方法和注意事项进行分析研究。结果：术前正畸治疗必须完成个别牙齿错位的调整，纠正牙弓形态与宽度的不调和牙齿代偿的去除：术后正畸的主要目的是牙弓内残留间隙的关闭和咬合关系的进一步精细调整。结论：只有完善的术前、术后正畸治疗与正颌外科手术相互配合，才能较好地完成成人严重骨性Ⅲ类错胎的临床治疗。     

骨性Ⅲ类错畸形术前术后正畸治疗的临床研究

目的探讨经正畸正颌联合治疗的骨性Ⅲ类错畸形患者的术前术后正畸治疗特点。方法 25例经完善的正畸正颌联合治疗的骨性Ⅲ类错畸形患者,分析治疗前(T0)、术前正畸治疗后(T1)、及矫治结束后(T2)的头颅定位侧位X线片,分析其不同时期的硬组织变化,总结术前术后正畸治疗特点。结果所有患者面部外形都较治疗前明显改观,咬合及功能改善。尽管头影测量结果显示骨面型:面角、颌凸角等变化明显,但术前正畸去代偿并不完全,上颌牙齿的代偿依然存在。术后的正畸主要是稳定手术后的颌骨关系和精细调整咬合,类似于综合性的正畸治疗。结论正畸正颌联合是治疗骨性Ⅲ类错畸形的有效手段,而治疗效果的日臻完善需要正畸正颌治疗的密切配合。     

成人严重骨性Ⅲ类错(牙合)畸形手术前后的正畸治疗

目的:研究成人严重骨性Ⅲ类错(牙合)畸形在正颌外科治疗的术前与术后正畸的特点及难点.方法:成人严重骨性Ⅲ类错(牙合)病例35例,对该类畸形的临床特点、正颌手术前后正畸治疗方法和注意事项进行分析研究.结果:术前正畸治疗必须完成个别牙齿错位的调整,纠正牙弓形态与宽度的不调和牙齿代偿的去除;术后正畸的主要目的是牙弓内残留间隙的关闭和咬合关系的进一步精细调整.结论:只有完善的术前、术后正畸治疗与正颌外科手术相互配合,才能较好地完成成人严重骨性Ⅲ类错(牙合)的临床治疗.     

骨性安氏Ⅱ类错的外科与正畸联合治疗

目的 :探讨外科与正畸联合治疗骨性安氏Ⅱ类错的方法和特点。方法 :总结分析近年来经外科与正畸联合治疗的骨性安氏Ⅱ类错病例 2 2例 ,介绍典型病例治疗过程 ,着重讨论拔牙时机、术前后正畸治疗特点及术式选择。结果 :本研究 2 2例患者经联合治疗后 ,颌骨关系正常 ,牙弓形态及曲线正常 ,牙排列整齐 ,咬合关系好 ,面形及功能均获明显改善 ,疗效满意。结论 :外科与正畸联合治疗是改正成人骨性安氏Ⅱ类错的有效方法 ,正确的术式选择及合理的正畸治疗是治疗成功的关键。     

成人骨性安氏Ⅱ类1分类错的正颌-正畸联合治疗

目的 采用正畸-正颌手术联合治疗骨性安氏Ⅱ类Ⅰ分类错(牙合)患者,介绍手术前后正畸及术前的准备工作。方法 11例成人骨性安氏Ⅱ类Ⅰ分类错(牙合)患者,均经术前正畸-正颌手术-术后正畸的治疗过程。手术前后正畸目的是矫正上下颌前牙前突,排齐牙列,协调上下牙弓,平整牙(牙合)曲线,建立正颌术后良好的咬合关系。术前准备包括术前电脑模拟手术、模型外科、(牙合)板制作。结果 11例患者建立了良好的咬合关系及协调的上下颌骨关系,面容美观改善。结论 骨性错(牙合)畸形患者采用正畸-正颌联合治疗,能获得功能和美观的满意效果,术前正畸、电脑模拟手术、模型外科、(牙合)板制作及术后正畸,每一操作步骤的精确到位均十分重要。     

正畸与正颌联合治疗成人骨性反后咀嚼肌肌电变化

目的 :检查对比分析成人骨性反牙合正畸与正颌手术联合矫治前后的主要咀嚼肌肌电 ,揭示正畸与正颌手术联合矫治后咀嚼肌功能的变化规律。方法 :2 0名正畸与正颌手术联合治疗的成人骨性反牙合患者 ,利用肌电图仪测试治疗前后咬肌、颞肌前束、二腹肌前腹在功能活动中肌电变化。结果 :正畸与正颌手术联合矫治对咬肌、颞肌前束、二腹肌前腹的功能活动均有不同程度的影响 ,其中对咬肌的功能影响最明显。结论 :正畸与正颌手术联合治疗成人骨性反牙合 ,咀嚼肌的异常肌张力多数得到纠正 ,但咀嚼肌的功能未能得到满意的恢复 ,咀嚼肌的功能恢复是一个复杂而长期的过程 ,还需要较长的功能锻炼恢复期     

成人前牙反畸形的正畸矫治

目的总结16例成人前牙反畸形正畸矫治的经验。方法回顾性分析此类病例正畸矫治适应证、矫治设计、矫治方法等。结果16例成人正畸患者经5个月至1年半的治疗，牙列排齐，反解除，覆覆盖正常，面型改善，患者对治疗效果满意。结论成人前牙反的正畸矫治，只要掌握其适应证，设计合理，通过固定正畸技术矫治，即可达到治疗目的，获得满意效果。     

牙外科正畸术矫治成人重度深覆

前牙深覆是一种常见的错畸形,严重的可影响面容、功能、牙周组织健康及义齿修复等,而用常规正畸治疗较为困难。作者用牙外科正畸手术矫治100余例,收到良好效果。本文讨论了手术的适应症、手术方法及术后注意事项。     

骨性安氏Ⅰ、Ⅲ类错(牙合)舌骨位置的对比研究邪

目的:对比骨性安氏Ⅰ类及骨性安氏Ⅲ类早期恒牙患者的舌骨位置.方法:选取骨性安氏Ⅰ类及骨性安氏Ⅲ类错患者,每组30例,对其头颅侧位片上舌骨的位置进行比较分析.结果:与安氏Ⅰ类错者相比,安氏Ⅲ类错者的舌骨位置更靠前,且与下颌平面呈顺时针方向旋转关系.结论:舌骨的位置变化与下颌骨的位置改变有关.     

骨性安氏Ⅰ、Ⅲ类错(牙合)舌骨位置的对比研究邪

目的:对比骨性安氏Ⅰ类及骨性安氏Ⅲ类早期恒牙患者的舌骨位置.方法:选取骨性安氏Ⅰ类及骨性安氏Ⅲ类错患者,每组30例,对其头颅侧位片上舌骨的位置进行比较分析.结果:与安氏Ⅰ类错者相比,安氏Ⅲ类错者的舌骨位置更靠前,且与下颌平面呈顺时针方向旋转关系.结论:舌骨的位置变化与下颌骨的位置改变有关.     

A prospective clinical trial of the effects produced by the Connecticut intrusion arch on the maxillary dental arch

ObjectiveTo assess and compare the effects produced in the maxillary dental arch by means of Connecticut intrusion arch (CIA) with or without a cinch back on the distal end of the tube of the first molars.Materials and MethodsThis study included 44 patients with a mean age of 13.1 ± 1.8 years treated for deep bite with a CIA randomly divided into two groups: group 1 (G1), 22 patients with initial mean age of 12.72 ± 1.74 years treated with the CIA in the upper arch without a cinch back on the distal surface of the tube of the first molars, and group 2 (G2), 22 patients with an initial mean age of 13.67 ± 2.03 years treated with the CIA with a cinch back. Lateral cephalograms were available before treatment (T1) and after intrusion of maxillary incisors (T2). The mean treatment period was 5.5 ± 1.45 months. Intragroup and intergroup changes in the maxillary incisor and molar positions were analyzed by paired and independent t-tests associated with the Holm-Bonferroni correction method for multiple comparisons (P < .05).ResultsThere were significant differences between groups in terms of maxillary incisor displacement. The maxillary incisors flared labially (2.17°) and proclined (1.68 mm) in group 1, whereas a palatal inclination (−1.99°) and retroclination (−1.13 mm) was observed in group 2. No significant differences were found for the molar positions between the groups.ConclusionsThe presence or absence of a distal bend in CIA affects incisor tipping and proclination during intrusion mechanics.     

核素测定在下颌骨发育性不对称畸形诊断中的应用

目的：应用核素测定行下颌骨发育不对称畸形的诊断。方法：对１９例除软组织或颌骨肿瘤、炎症、损伤等因素外下颌骨发育性不对称畸形患者进行９９ｍＴｃＭＤＰ吸收值测定，比较下颌骨双侧髁状突、升支及体部对９９ｍＴｃＭＤＰ的吸收值。结果：１８岁以上患者不对称的下颌骨双侧９９ｍＴｃＭＤＰ吸收值无明显差异，１８岁以下患者的双侧髁状突及体部都有显著差异。随着年龄的增长，双侧下颌骨总的９９ｍＴｃＭＤＰ吸收趋于平衡，但个别畸形在全身发育稳定后仍有继续发展的可能。结论：核素测定的应用对于下颌骨发育性不对称畸形的诊断有所帮助     

Effects of the degree of overbite and overjet on dental health

The purpose of the study was to examine whether any combination of vertical overbite (OB) and horizontal overjet (OJ) may be more favourable than others to dental health in anterior segments. The study group consisted of 74 females and 70 males. The participants were 15-years-old and had 6 anterior teeth in both jaws. The following parameters were assessed: plaque index, gingival index, probing depth, space index, filled surfaces, the number of non-aligned proximal tooth surfaces (NONAS) and the OB/OJ ratio. The results demonstrated that participants with a relatively high OB/OJ ratio (OB/OJ greater than or equal to 1.21) had a more favourable periodontal condition than participants with lower ratios. This was so in both sexes and both jaws. The OB/OJ ratio had little relation to the prevalence of filled surfaces.     

髁突形态与覆深度关系的研究

目的　探讨髁突形态与不同覆深度的关系。方法　选择正常者、开畸形患者、覆正常的错畸形患者和深覆畸形患者各 5 0人 ,均为 18至 2 6岁成人。应用曲面断层片研究左右两侧的髁突形态 ,分别测量并计算上部髁突高度 /升支高度比 (UCH/RH)和髁突高度 /宽度比 (TCH/CW )。将髁突形态分为四种类型 :直立型 (类A) ,前倾型 (类B) ,后倾型 (类C)和尖型 (类D)。结果　开组的上部髁突高度相对升支高度明显小于其他各组 (P <0 0 0 1)。正常组的髁突形态比较粗壮 ,高度宽度比明显小于其他各组 (P <0 0 0 1)。类A和类B属于正常髁突形态 ,占正常组的 99%。类C和类D属于异常髁突形态 ,且在开组中的比例明显高于正常覆组或深覆组。另外 ,只有开组中显示上部髁突高度两侧不对称 (P <0 0 5 )。结论　开组髁突形态与其他各组相比明显不同。     

The effect of overbite and overjet on clinical parameters of periodontal disease: A case control study

AimTo investigate the association of overjet and overbite with clinical parameters of periodontal disease.Material and methodsThe study was performed in Riyadh, Saudi Arabia, from March 2017 to March 2018. 600 Saudi males aged 20–30 years old were included. Participants were divided into three groups (n: 200) depending on the presence of overjet (OJ) or overbite (OB) and its relationship with periodontal disease. Periodontal parameters were assessed clinically and radiographically. One-way analysis of variance was used to test for any significant differences between groups. Tukey’s post hoc comparison test was used to evaluate correlations among parameters.ResultsOJ exceeding 8 mm was correlated with debris, calculus, and periodontal scores on mandibular anterior teeth, especially on the lingual surfaces.Both OJ and OB groups showed significantly increased PD, compared to that of the control group in measurement at the lingual (P = 0.004, 0.003) and proximal (P = 0.002, 0.002) surfaces of the lower anterior teeth. Finally, the CEJ-AB was statistically significantly higher in the OB group compared to the OJ and control groups (P = 0.091, 0.008).ConclusionThe present study found a correlation between OJ and OB and periodontal disease, as measured using specific parameters. This indicates that periodontal treatment may be insufficient unless the overjet or overbite is corrected.     

儿童替牙期骨性AngleⅢ类错(牙合)咀嚼肌肌电研究

目的:研究儿童替牙期骨性AngleⅢ类错(牙合)与正常(牙合)的咀嚼肌肌电变化规律.方法:对20例替牙期AngleⅢ类骨性错(牙合)儿童及20名正常(牙合)儿童进行咀嚼肌肌电图检查,测量嚼肌深浅层和颞肌前后束在姿势位、牙尖交错咬合位、前伸运动边缘位、后退运动边缘位的肌电活动,所得数据进行统计学分析.结果:骨性安氏Ⅲ类错(牙合)姿势位嚼肌与颞肌的肌电活动均大于正常(牙合);牙尖交错咬合位嚼肌、颞肌肌电位均较正常(牙合)小;下颌前伸时颞肌前束肌电显著性高于正常(牙合);下颌后退时,嚼肌显著性高于正常(牙合).结论:替牙期AngleⅢ类骨性错(牙合)肌电有其特征性,提示早期矫治替牙期AngleⅢ类骨性错(牙合)不仅能解决美观问题,更有利于改善咀嚼肌收缩功能,减少肌功能对颅面形态的不良影响.     

Descriptive epidemiology of dental malocclusion in Najran patients seeking orthodontic treatment

BackgroundUntreated malocclusion can lead to compromised aesthetic function, depression, and low self-esteem. The aim of this study was to evaluate dental malocclusion in Najran, Saudi Arabia as no data existed before.MethodThis was a retrospective study analyzing the casts of all patients in Najran, Kingdom of Saudi Arabia, seeking orthodontic management for malocclusion between 2017 and 2019.MeasurementsThe consultant orthodontist is the single investigator involved in collecting the details of demographics followed by molar relationships, overjet, overbite, crowding and spacing using digital caliper on each dental cast. Data were analyzed using IBM SPSS Statistics for IOS Version 25 (Armonk, NY: IBM Corp.ResultsA total of 326 patients sought treatment for different types of malocclusion. There were 143 males and 183 females with an M:F ratio of 1:1.3. Age ranged from 6 to 55 years with a mean SD of 22.6 ± 8.98. The prevalence for Class I, II and III malocclusions at 95% CI was (0.76 (0.757, 0.774)), 0.251 (0.243, 0.260) and 0.529 (0.519, 0.539) respectively. Fifty-one (15.6%) patients had reversed overjet, 65 (19.9%) reduced overjet, and 86 (26.4%) increased overjet. One hundred and sixty-four (50.3%) cases of reduced overbite and 99 (30.4%) cases of deep overbite were also observed. Tooth size arch length discrepancy were noticed with crowding and spacing in 83 (26.4%) and 71 (21.8%) patients, respectively.ConclusionsThis study has shown the prevalence of Class I, Class II, and Class III malocclusion to be 72.7%, 11.6% and 15.6% respectively. Increased over jet and crowding was demonstrated in more patients, though it is not statistically significant.