反向型生物调节器在治疗乳牙期和混合牙列期前牙反的应用

目的探讨反向型生物调节器对乳牙列和替牙列前牙反牙合的治疗效果。方法选择生长发育高峰期的乳牙期和替牙期的前牙反牙合病例43例,应用反向型生物调节器进行治疗,并观察疗效和时间。结果除1例乳牙反牙合替牙后出现前牙反牙合复发外,其余病例均能解除反牙合,并能保持疗效,有效率97.6﹪。解除反牙合平均需要5.4个月。结论反向型生物调节器可用于乳牙和混合牙列早期前牙反牙合的治疗。     

反向型生物调节器在治疗乳牙期和混合牙列期前牙反(牙合)的应用

目的探讨反向型生物调节器对乳牙列和替牙列前牙反(牙合)的治疗效果.方法选择生长发育高峰期的乳牙期和替牙期的前牙反(牙合)病例43例,应用反向型生物调节器进行治疗,并观察疗效和时间.结果除1例乳牙反(牙合)替牙后出现前牙反(牙合)复发外,其余病例均能解除反(牙合),并能保持疗效,有效率97.6%.解除反(牙合)平均需要5.4个月.结论反向型生物调节器可用于乳牙和混合牙列早期前牙反(牙合)的治疗.     

Ⅲ类牵引快速矫治儿童前牙反He22例报告

目的 总结早期Ⅲ类牵引矫正儿童前牙反He的临床疗效。方法 22例乳牙期或替牙期前牙反治病例，固定矫治早期行Ⅲ类牵引，观察疗效及疗程。结果 22例均快速解除前牙反He，平均9d(1—21d)；平均疗程6周。结论 固定正畸早期Ⅲ类牵引矫治儿童前牙反He，疗效快，效果好。     

Ⅲ类牵引快速矫治儿童前牙反22例报告

目的　总结早期Ⅲ类牵引矫正儿童前牙反牙合的临床疗效。方法　 2 2例乳牙期或替牙期前牙反牙合病例 ,固定矫治早期行Ⅲ类牵引 ,观察疗效及疗程。结果　 2 2例均快速解除前牙反牙合 ,平均 9d( 1～ 2 1d) ;平均疗程 6周。结论　固定正畸早期Ⅲ类牵引矫治儿童前牙反牙合 ,疗效快 ,效果好。     

功能矫治器FR—Ⅲ与上颌He垫矫治器联合应用治疗替牙期前牙反He的临床效果

目的 观察功能矫治器FR-Ⅲ与上颌He垫矫治器联合应用治疗替牙期前牙反He的效果。方法 选择替牙期前牙反He患者24例，白天戴用上颌He垫矫治器，晚上戴用FR-Ⅲ矫治器，治疗前后拍摄头颅侧位片进行头影测量分析。结果 24例患者均在1个月左右前牙呈对刃关系，5个月后中性He关系完全建立，面型获得较大改善。结论 FR-Ⅲ矫治器与上颌He垫矫治器联合应用，既能快速解除前牙反He，诱导后牙建立正常咬合关系，又能促进上颌骨发育，抑制下颌向前生长。     

双垫反向唇弓矫治器治疗替牙期前牙反的临床应用

目的探讨双垫反向唇弓矫治器治疗功能因素为主的替牙期前牙反的疗效。方法用双垫反向唇弓矫治器矫治以功能因素为主的替牙期前牙反患儿10例,评价其临床效果。结果10例患儿的前牙反解除,建立了正常的覆、覆盖,磨牙达中性或中性偏近中关系。疗程最长6个月,最短2个月,平均3.9个月。结论双垫反向唇弓矫治器对以功能因素为主的前牙反有良好的治疗效果。     

改良矫治器矫治儿童前牙反(牙合)25例

目的 观察替牙期及乳牙期前牙反(牙合)矫治的效果.方法 通过改良的活动矫治器对25例替牙期乳牙期前牙反(牙合)进行矫治.结果 前牙反(牙合)解除快速有效,并使上下颌骨生长向正常方向转化.结论 3～5岁为乳牙反(牙合)矫治的合适年龄;改良式导弓可促使上下颌骨正常生长,而且解除反(牙合)方法简便,疗程短.     

Ⅲ类牵引快速矫治儿童前牙反（牙合）22例报告

目的总结早期Ⅲ类牵引矫正儿童前牙反（牙合）的临床疗效.方法 22例乳牙期或替牙期前牙反（牙合）病例,固定矫治早期行Ⅲ类牵引,观察疗效及疗程.结果 22例均快速解除前牙反（牙合）,平均9 d(1～21 d);平均疗程6周.结论固定正畸早期Ⅲ类牵引矫治儿童前牙反（牙合）,疗效快,效果好.     

改良矫治器矫治儿童前牙反25例

目的观察替牙期及乳牙期前牙反矫治的效果。方法通过改良的活动矫治器对25例替牙期乳牙期前牙反进行矫治。结果前牙反解除快速有效,并使上下颌骨生长向正常方向转化。结论3～5岁为乳牙反矫治的合适年龄;改良式导弓可促使上下颌骨正常生长,而且解除反方法简便,疗程短。     

双(牙合)垫反向唇弓矫治器治疗替牙期前牙反(牙合)的临床应用

目的 探讨双(牙合)垫反向唇弓矫治器治疗功能因素为主的替牙期前牙反(牙合)的疗效.方法 用双(牙合)垫反向唇弓矫治器矫治以功能因素为主的替牙期前牙反(牙合)患儿10例,评价其临床效果.结果 10例患儿的前牙反(牙合)解除,建立了正常的覆(牙合)、覆盖,磨牙达中性或中性偏近中关系.疗程最长6个月,最短2个月,平均3.9个月.结论 双(牙合)垫反向唇弓矫治器对以功能因素为主的前牙反(牙合)有良好的治疗效果.     

Duplication of the premolar dentition

Multiple supernumerary teeth, often associated with various syndromes, is a relatively uncommon isolated dental anomaly. We present a case of a 9-year-old black male patient with complete duplication of the premolar dentition and premolarization of the permanent canines.     

Rehabilitation of the worn dentition

The purpose of this review was to evaluate the literature on the rehabilitation of tooth wear, with some pertinent historical, epidemiological and aetiological aspects of tooth wear provided as background information. In historical skull material, extensive tooth wear, assumed to be the result of coarser diets, was found even in relatively young individuals. Such wear is seldom seen in current populations. Although many of the factors associated with extensive tooth wear in historical material are no longer present or prevalent, new risk factors have emerged. In the young individual, the literature points to a global rise in soft drink consumption as the most significant factor in the development of tooth wear through dental erosion. Among older individuals, lifestyle changes and chronic diseases that are controlled with medications that may, in turn, result in regurgitation and/or dry mouth, are possible reasons amongst others for the widespread clinical impression of an increasing prevalence of tooth wear. The aetiology of tooth wear is multifactorial and the role of bruxism is not known. Clinical controlled trials of restorative and prosthodontic approaches for the range of clinical conditions that wear can give rise to, are limited in number and quality. Equally, the striking lack of evidence regarding the long-term outcomes of treatment methods and materials calls for caution in clinical decision-making. Notwithstanding these observations, clinicians have provided and continue to provide rehabilitative strategies for managing their patients' worn dentitions that range traditionally from extensive prosthodontics to an increasing reliance on adhesive techniques.