安氏Ⅰ、Ⅱ、Ⅲ类错患者Bolton不调量的分析

目的　了解安氏错患者上下颌Bolton不调量的大小及发生率。方法　选择 4 39例安氏错患者的模型 ,分别测量上下颌 6个前牙 (左右恒尖牙之间 )及 1 2个恒牙 (左右第一恒磨牙之间 )的牙冠近远中宽度总和 ,根据Bolton指数正常值获取上颌Bolton不调量并作统计学分析。结果　 439例安氏Ⅰ、Ⅱ、Ⅲ类错患者中 ,前牙或全牙Bolton不调量绝对值大于或等于 1 5mm的错患者占该类患者的百分比分别为 14.02 %、9.49%、19.32 %或19.63%、15.33%、20.45 %。安氏Ⅰ类错患者前牙Bolton不调量以上前牙牙量减少、下前牙牙量增多为常见 ;安氏Ⅱ类、Ⅲ类错患者 ,前牙或全牙Bolton不调者上颌和下颌牙量偏多偏少 ,差异无显著性。结论　错患者Bolton不调不是引起错发生的主要原因。     

安氏Ⅰ、Ⅱ、Ⅲ类错(牙合)患者Bolton不调量的分析

目的了解安氏错(牙合)患者上下颌Bolton不调量的大小及发生率.方法 选择439例安氏错（牙合）患者的模型,分别测量上下颌6个前牙(左右恒尖牙之间)及12个恒牙(左右第一恒磨牙之间)的牙冠近远中宽度总和,根据Bolton指数正常值获取上颌Bolton不调量并作统计学分析.结果 439例安氏Ⅰ、Ⅱ、Ⅲ类错（牙合）患者中,前牙或全牙Bolton不调量绝对值大于或等于1.5 mm的错（牙合）患者占该类患者的百分比分别为14.02%、9.49%、19.32%或19.63%、15.33%、20.45%.安氏Ⅰ类错(牙合)患者前牙Bolton不调量以上前牙牙量减少、下前牙牙量增多为常见;安氏Ⅱ类、Ⅲ类错(牙合)患者,前牙或全牙Bolton不调者上颌和下颌牙量偏多偏少,差异无显著性.结论 错(牙合)患者Bolton不调不是引起错(牙合)发生的主要原因.     

十堰地区错畸形患者Bolton指数的测量

目的:分析十堰地区各类错牙合畸形患者Bolton指数及Bolton指数不调发生率的差异。方法:随机选择3 2 5例不同类型错牙合畸形患者的记存模型,分别测量上、下颌全牙量和前牙量,计算Bolton指数值及Bolton指数不调的发生率,进行统计学分析。结果:安氏Ⅰ类和安氏Ⅲ类错牙合前牙Bolton指数及全牙弓Bolton指数均大于安氏Ⅱ类1分类错牙合病例,且具有统计学差异(P <0 .0 5 ) ;安氏Ⅰ类错牙合Bolton指数不调发生率大于安氏Ⅱ类1分类及安氏Ⅱ类2分类,安氏Ⅲ类错牙合Bolton指数不调发生率大于安氏Ⅱ类1分类错牙合病例,有统计学差异。结论:不同类型错牙合畸形病例的Bolton指数及Bolton指数不调发生率有统计学差异,正畸治疗前进行Bolton指数分析非常重要。     

十堰地区错畸形患者Bolton指数的测量

目的分析十堰地区各类错(牙合)畸形患者Bolton指数及Bolton指数不调发生率的差异.方法随机选择325例不同类型错(牙合)畸形患者的记存模型,分别测量上、下颌全牙量和前牙量,计算Bolton指数值及Bolton指数不调的发生率,进行统计学分析.结果安氏Ⅰ类和安氏Ⅲ类错(牙合)前牙Bolton指数及全牙弓Bolton指数均大于安氏Ⅱ类1分类错(牙合)病例,且具有统计学差异(P<0.05);安氏Ⅰ类错(牙合)Bolton指数不调发生率大于安氏Ⅱ类1分类及安氏Ⅱ类2分类,安氏Ⅲ类错(牙合)Bolton指数不调发生率大于安氏Ⅱ类1分类错(牙合)病例,有统计学差异.结论不同类型错(牙合)畸形病例的Bolton指数及Bolton指数不调发生率有统计学差异,正畸治疗前进行Bolton指数分析非常重要.     

十堰地区错(牙合)畸形患者Bolton指数的测量

目的:分析十堰地区各类错(牙合)畸形患者Bolton指数及Bolton指数不调发生率的差异.方法:随机选择325例不同类型错(牙合)畸形患者的记存模型,分别测量上、下颌全牙量和前牙量,计算Bolton指数值及Bolton指数不调的发生率,进行统计学分析.结果:安氏Ⅰ类和安氏Ⅲ类错(牙合)前牙Bolton指数及全牙弓Bolton指数均大于安氏Ⅱ类1分类错(牙合)病例,且具有统计学差异(P<0.05);安氏Ⅰ类错(牙合)Bolton指数不调发生率大于安氏Ⅱ类1分类及安氏Ⅱ类2分类,安氏Ⅲ类错(牙合)Bolton指数不调发生率大于安氏Ⅱ类1分类错(牙合)病例,有统计学差异.结论:不同类型错(牙合)畸形病例的Bolton指数及Bolton指数不调发生率有统计学差异,正畸治疗前进行Bolton指数分析非常重要.     

乌鲁木齐地区错[牙合]畸形患者Bolton指数的分析研究

目的探究乌鲁木齐地区三种安氏错[牙合]畸形患者Bolton指数及Bolton比不调的发生情况。方法对240例正畸患者石膏模型的Bolton前牙比和全牙比进行测算,得出Bolton指数范围以及Bolton比不调的发生情况。结果乌鲁木齐地区错牙合畸形患者Bolton指数前牙比及全牙比不调发生率分别为57.08%、40.83%。该地区错[牙合]畸形患者Bolton比与国人平均正常[牙合]Bolton比之间无统计学差异(P>0.05)。Bolton指数不调发生率在安氏Ⅰ类、Ⅱ类、Ⅲ类之间差异具有统计学意义(P<0.05)。男女之间Bolton比值不调发病率不存在统计学差异(P>0.05)。以牙齿大小不调量大于(或)等于1.5 mm作为Bolton不调量的指标,前牙不调和全牙不调发生率分别为15.4%、15%。结论乌鲁木齐地区错牙合畸形患者中Bolton指数不调的发生率偏高,应重视其在指导正畸初诊病例分析诊断中的意义并将其纳入常规正畸诊断分析的重要指标之一。     

各类错畸形的上下颌牙量关系的研究

目的　探讨各类错牙合畸形上下颌牙量关系的差异。方法　本文对 16 6例安氏Ⅰ类、安氏Ⅱ类 1分类、安氏Ⅱ类 2分类、安氏Ⅲ类患者模型的上、下颌牙量 ,上、下前牙量、全牙比及前牙比进行比较研究。结果　未发现组间存在统计学差异 ;同时对错牙合组间Bolton指数不调的比率进行分析 ,亦未发现有统计学差异。但发现纳入各组样本中 ,Bolton指数不调的比率较高。结论　结果临床上对Bolton指数分析应予以足够重视。     

安氏Ⅱ类错(牙合)的牙冠宽度与Bolton指数的测量分析

目的:通过对安氏Ⅱ1类及安氏Ⅱ2类错(牙合)与正常(牙合)模型比较,分析上下颌牙冠宽度、Bolton指数差异,为安氏Ⅱ类错(牙合)矫治设计提供参考.方法:以正常(牙合),安氏Ⅱ1及安氏Ⅱ2错(牙合)各40例为研究对象,分别进行牙冠宽度测量并计算Bolton指数.结果:①安氏Ⅱ1错(牙合)的上下颌侧切牙及第二前磨牙的牙冠宽度比正常(牙合)大,并有显著性差异.②Bolton指数前牙比及全牙比:正常(牙合)＞安氏Ⅱ2错(牙合)>安氏Ⅱ1错(牙合).③正常(牙合)上下颌前牙牙量的直线回归方程:Y=X 10.45;全牙列的直线回归方程:Y=1.13X-2.57.结论:上下颌牙量不调是造成安氏Ⅱ类错(牙合)深覆盖、深覆(牙合)的因素之一;前牙量及全牙量的线性回归方程具有较高的临床应用价值.     

安氏Ⅱ类错的牙冠宽度与Bolton指数的测量分析

目的:通过对安氏Ⅱ1类及安氏Ⅱ2类错与正常模型比较,分析上下颌牙冠宽度、Bolton指数差异,为安氏Ⅱ类错矫治设计提供参考。方法:以正常,安氏Ⅱ1及安氏Ⅱ2错各40例为研究对象,分别进行牙冠宽度测量并计算Bolton指数。结果:①安氏Ⅱ1错的上下颌侧切牙及第二前磨牙的牙冠宽度比正常大,并有显著性差异。②Bolton指数前牙比及全牙比:正常>安氏Ⅱ2错>安氏Ⅱ1错。③正常上下颌前牙牙量的直线回归方程:Y=X 10.45;全牙列的直线回归方程:Y=1.13X-2.57。结论:上下颌牙量不调是造成安氏Ⅱ类错深覆盖、深覆的因素之一;前牙量及全牙量的线性回归方程具有较高的临床应用价值。     

错[牙合]畸形患者Bolton指数分析

目的：通过对错[牙合]畸形患者Bolton指数测量分析,探讨牙冠宽度与安氏各类错[牙合]畸形的关系。方法：错[牙合]畸形患者的初始记存模型382副,按照安氏Ⅰ、Ⅱ1、Ⅱ2、Ⅲ类分组。测量牙冠宽度并计算Bohon指数,测量结果采用Dunean’s检验。结果：382例错[牙合]畸形病例的前牙比、全牙比、后牙比均没有性别间的差异。安氏Ⅰ、Ⅱ1、Ⅱ2类错[牙合]畸形患者前牙比和全牙比与正常[牙合]人群基本一致,而Ⅲ类错[牙合]畸形患者前牙比和全牙比则与正常[牙合]人群间存在差异,安氏Ⅲ类错[牙合]畸形患者的前牙比及全牙比明显高于其他各组,有显著性差异。结论：上下颌间牙量关系不调是安氏Ⅲ类错[牙合]畸形的主要病因之一。     

Tooth-size discrepancy in mandibular prognathism.

A Bolton analysis of seventy-eight cases of Angle Class III malocclusion, twenty-six cases of Angle Class I malocclusion, and twenty-six cases of Angle Class II malocclusion was recorded. Frequency of excess mandibular tooth structure, magnitude of the excess, over-all ratios, and anterior segment ratios were computed and analyzed. Two clinical cases were presented to show the advantage of tooth-size harmony in mandibular prognathism. Analysis of the data as presented above suggests the following conclusions: 1. The frequency of mandibular tooth-size excess (over-all ratio) in this sample was greater in cases of mandibular prognathism than in Angle Class I and Angle Class II cases. 2. In those cases with mandibular tooth-size excess, there was a suggestion that the magnitude of the excess was greater in cases of mandibular prognathism than in Angle Class I and Angle Class II cases. 3. A tooth-size discrepancy analysis should be included as one part of the diagnostic records for mandibular prognathism.     

Bolton anterior tooth size discrepancies among different malocclusion groups

Orthodontic treatment comprises different phases with unique characteristics and challenges. The orthodontic "finishing" phase is recognized for the multitude of details necessary to achieve an excellent result. In some cases, the finishing phase is very difficult, requiring the production of complicated biomechanical forces to reach a satisfactory orthodontic solution. A high percentage of these finishing-phase difficulties arise because of tooth size imbalances that could have been detected and considered during initial diagnosis and treatment planning. The present study aimed to investigate the correlation between anterior tooth size discrepancies and Angle's Class I, II, and III malocclusions, as well as their prevalence in the Brazilian population from Belo Horizonte. We assessed the mesiodistal width of six anterior teeth in 300 patients, who were selected randomly. These patients were allocated to three groups according to their malocclusion. A chi-square test was performed to statistically compare the prevalence of anterior tooth size discrepancies among the three malocclusion groups and two genders. Analysis of variance was used to compare the mean Bolton anterior tooth size ratios as a function of Angle classification and gender. Statistical differences were determined at the 95% confidence level (P < .05). The important conclusions of our study are as follows: (1) Individuals with Angle Class I and Class III malocclusions show significantly greater prevalence of tooth size discrepancies than do individuals with Class II malocclusions; and (2) Mean anterior tooth size discrepancy for Angle Class III subjects was significantly greater than for Class I and Class II subjects.     

ɽ��������ͬ�����ϻ���Boltonָ����������

目的分析山东地区各类错拾患者Bolton指数及Bohon指数不调的发生率。方法选取2005-2009年山东省口腔医院及济南市口腔医院正畸科收治的180例错拾畸形患者的石膏模型,按Angle错铪分类法分为Angle I、Ⅱ、Ⅲ 3组,每组60例。测量并分析Bohon指数。结果山东地区不同错矜患者的BOIton指数前牙比、全牙比在性别及错袷类型方面的差异无统计学意义（P〉0．05）,与中国人正常拾相比差异亦无统计学意义（P〉0．05）。以中国人正常牙争Bohon指数±2个标准差为标准,山东地区错袷患者的前牙比、全牙比不调的发生率分别为14．44％、6．66％,且不同类型错矜间差异无统计学意义（P〉0．05）。以iBohon不调量（TSD）J≥1．5mm为标准时,Bolton指数前牙比、全牙比不调的发生率分别为17．23％、40．00％,Angle I类错矜全牙比不调的发生率与Anglem类错铪相比差异有统计学意义（P〈0．05）。结论中国人正常袷的Bolton指数比值同样适用于山东地区各类错拾患者;与Bolton指数的百分比值相比,TSD的实际值可以为临床正畸医生提供更多有关牙量不调的信息。     

Intermaxillary tooth size discrepancy and malocclusion: is there a relation?

The aims of this study were to identify the possible sex differences in tooth size ratios between males and females, to determine whether there is a difference in the incidence of tooth size discrepancies for both the anterior and overall ratios when comparing with Angle Class I; Class II, division 1; Class II, division 2; and Class III malocclusion groups, to compare the tooth size ratios of different malocclusion groups with the anterior and overall tooth size ratios of 150 untreated normal occlusion subjects. In addition, the aim was to determine the percentage of tooth size discrepancies outside 2 SD from Bolton means for tooth ratios present in each malocclusion group and in the overall sample of this study. This study consisted of 150 subjects who served as the normal occlusion group and 560 patients who showed four different malocclusion characteristics (Angle Class I; Class II, division 1; Class II, division 2; and Class III). Tooth size measurements were performed on the models of normal occlusion and pretreatment models. For statistical evaluation, Student's t-test, analysis of variance and Tukey Honestly Significant Difference tests were performed. A significant sex difference was found only in the overall ratio for normal occlusion subjects (P < .001). All malocclusion groups showed statistically significant higher overall ratios than the normal occlusion group (P < .001). There were no statistically significant differences among malocclusion groups; however, there were a large number of patients within each group who had discrepancies greater than 2 SD from the mean. Further investigations are needed to explain the probable racial differences and relationships between malocclusion and tooth size measurements.     

恩施土家族苗族自治州错畸形患者Bolton指数分析

目的：通过对恩施土家族苗族自治州各民族不同类型的错畸形患者Bolton指数进行测量分析,探讨本州错畸形类型与Bolton指数之间的关系。方法：随机选择错畸形患者记存模型586副,按照安氏分类法分组,各组内再根据民族、性别进一步分组。测量Bolton指数并进行全面统计分析。结果：各类错畸形患者民族、性别间Bolton指数差异无显著性。安氏I类错与正常Bolton指数差异无显著性,但是安氏II类、安氏III类错与正常Bolton指数之间存在差异,安氏II类错Bolton指数偏小,安氏III类错Bolton指数偏大,差异有显著性。结论：上、下颌牙量不调可能是安氏II类I、II类错的主要原因之一。     

Bolton tooth size discrepancies in skeletal Class I individuals presenting with different dental angle classifications

The objective of this study was to investigate the frequency and association of Bolton tooth size discrepancies with dental discrepancies. Forty-eight skeletal Class I, 60 Class II, and 44 Class III subjects with similar skeletal characteristics were included in this study. Analysis of variance was performed to compare the mean ratios of Bolton analysis as a function of the Angle classification and sex. To determine the prevalence of tooth size imbalances among the three groups of occlusions and the two sexes, chi-square tests were performed. To determine the correlation of tooth size imbalances with certain dental characteristics, Pearson's correlation coefficients were calculated. No statistically significant differences were determined for the prevalence of tooth size discrepancies and the mean values of Bolton's anterior and overall ratios among the occlusal groups and sexes. Bolton's anterior ratio discrepancies had significant correlations with midline shifts (P < .05) in Angle Class I cases, with U1-SN angle (P < .01) in Angle Class II cases, and with L1-APog distance (P < .05) in Angle Class III cases. Bolton discrepancies related to overall ratio had significant correlations with overjet (P < .05) in Class I cases, with overbite (P < .05) and U1-SN angle (P < .01) in Class II cases, and with IMPA (P < .01) in Class III cases. A high prevalence of tooth size discrepancies in an orthodontic patient population and the statistically significant correlation of some of these with some dental characteristics suggest that the measurement of interarch tooth size ratios might be clinically beneficial for treatment outcomes.     

不同磨牙关系的安氏Ⅱ类错[牙][合]上下颌牙量关系的对比研究

目的：通过比较不同磨牙关系的安氏II类错殆Bolton指数及Bolton不调量，探讨不同磨牙关系的安氏Ⅱ类错胎患者在上下颌牙量关系方面的差异。方法：以安氏Ⅱ错骀162例为研究对象，按照磨牙关系不同分为磨牙关系远中尖对尖组（简称尖对尖组）114例，磨牙关系完全远中组（简称完全远中组）48例，分别对其模型进行牙冠宽度测量，计算Bolton指数，再根据Bolton指数正常值获取上颌Bolton不调量。两组之间进行统计学分析。结果：完全远中组全牙、前牙Bolton指数比值均大于尖对尖组，有统计学差异（P〈O．05）。两组错胎间全牙Bolton不调的分布比率表现出统计学差异（P〈O．05）。而前牙Bolton不调的分布比率未表现出统计学差异。两组错黯间Bolton不调量总和与Bolton不调程度的分布比率的比较未表现出统计学差异。结论：不同磨牙关系的安氏II类错胎畸形在上下颌牙量关系方面存在差异，在治疗时应该加以重视。     

上海地区213例错He患者Bolton指数的测量分析

目的了解Bolton指数在上海地区的错(牙合)患者中有无性别差异,分布情况如何及应用于各类错(牙合)畸形是否有差异.材料和方法把符合标准的213副模型按Bolton正常值和一个标准差分为过小、正常、过大三组,测量它们的前牙比和全牙比,进行统计分析.结果Bolton指数正常的患者最多,Bolton指数过大的患者最少.前牙比过大的患者中Ⅲ类均数远大于I类;全牙比过小的男性患者中Ⅱ类均数远大于Ⅲ类.结论错(牙合)患者人数分布有差异,Bolton指数在各类错(牙合)畸形中有差异.