Orthodontic camouflage treatment of skeletal class II malocclusion with severe maxillary dentoalveolar protrusion

This case report describes the orthodontic treatment of a 14-year-old male patient who presented with prognathic maxilla, severe dentoalveolar proclination, deepbite and retained deciduous tooth. We selected headgear and fixed appliance to correct malocclusion but cooperation towards headgear was found less during treatment. So we chose orthodontic camouflage treatment to correct dentoalveolar problems without altering the skeletal base relation. The final treatment results were good and patient had improvement in esthetic and function.     

正畸患者牙龈卟啉单胞菌基因检测

目的 对正畸患者口腔中牙龈卟啉单胞菌等牙周致病菌进行检测。方法 选择１６例固定正畸患者发生牙周炎症的牙周袋和牙周健康的龄袋为取菌斑样本占。分成牙周炎症组和对照组。根据改良聚合酶链反应检测技术，直接检测临床标本中牙龈卟啉单力的ＦｉｍＡ基因，并做此检测技术的敏感性和特异性实验。结果 牙周炎组牙龈卟啉单胞菌的检测阳性率（５６．３５）显著大于对照组（１８．８％），Ｐ〈０．０５。检测技术的敏感性和特异性较高     

Follow-up control of patients with unilateral posterior cross-bite treated with expansion plates or the quad-helix appliance

The aim of this study was to evaluate the long-term stability of the occlusion after correction of posterior cross-bite with either a removable expansion plate or a quad-helix appliance and to compare the transversal development of the jaws in the plate group, the quad-helix group and a control group.At the start of treatment there were 22 children in each of the treated groups. Two children in the plate group and 1 child in the quad-helix group discontinued the treatment. Two children treated with the quad-helix appliance and 1 child in the plate group could not be reached for the follow-up registration, so the collective finally consisted of 30 boys and 27 girls: 19 subjects in the plate group, 19 in the quad-helix group and 19 controls.The treatment groups were studied with the help of plaster models before treatment, immediately after treatment and at the last registration about 5.5 years after treatment. The control group was studied with the help of plaster models on 2 occasions, at the mean age of 8.8 years and 15.9 years respectively. This was about the same age as the first and the last registrations in the treatment groups.In all children, the posterior cross-bite was corrected by the end of the treatment. At the last registration, the corrected posterior cross-bite had relapsed in 1 child in the plate group and in 3 children in the quad-helix group.The degree of expansion was similar for both groups. The mean treatment time was longer in the plate group than in the quad-helix group: 12.5 months and 7.7 months respectively.Despite a transversal expansion in the treatment groups, the width of the maxillary dental arch did not reach the mean width in the control group, and even at the last registration the width of the maxillary dental arch was significantly greater in the control group than in the treated groups.The conclusions of this study are: 1. The long-term treatment effect in children with posterior cross-bite was somewhat better when they were treated with the removable expansion plate in comparison with treatment with the quad-helix appliance. 2. Both immediately after treatment and at the last registration 5.5 years later, the width of the maxillary dental arch was significantly greater in the control group than in the plate group or the quad-helix group while the width of the mandibular dental arch was equal in all 3 groups.     

Twin-block矫治器在安氏Ⅱ~1类错中的临床应用研究

目的观察Twin-block功能矫治器对于生长发育期安氏Ⅱ1类错的矫治作用,探讨其矫治机制。方法选择18例生长发育期的安氏Ⅱ1类错患者,男10例,女8例,年龄10¹3岁,无矫治史的患者使用Twin-block功能矫治器进行矫治。结果 18例患者经过2013岁,无矫治史的患者使用Twin-block功能矫治器进行矫治。结果 18例患者经过20²4个月的治疗后,前牙覆、覆盖关系基本正常,磨牙关系中性,软组织侧貌改善明显。结论 Twin-block功能矫治器对于生长发育期的安氏Ⅱ1类错患者效果明显。     

口腔矫治器治疗阻塞性睡眠呼吸暂停低通气综合征及上气道形态的变化

阻塞性睡眠呼吸暂停低通气综合征(OSAHS)临床表现为夜问频发的上气道阻塞和呼吸障碍,伴发日间嗜睡、疲倦等.病因机制主要是上气道形态的变化和神经肌因素等.口腔矫治器是治疗轻、中度OSAHS的有效方法,本文对口腔矫治器治疗OSAHS及上气道形态的变化作一综述.     

尖牙后退与磨牙支抗丧失

作者对43例(50侧)拔除上颌第一前磨牙,推尖牙向远中患者进行了矫治前、后牙模的测量.结果是17侧(34%)无磨牙前移支抗丧失,尖牙平均后退4.78mm;33侧(66%)发生磨牙前移支抗丧失,平均前移1.54mm.而尖牙平均后退4.11mm。本结果表明,本文设计的矫正器是确实可行的.同时还讨论了有关问题.     

固定矫治器加平面导板在前牙外伤治疗中的应用

目的：探讨固定矫治器加平面导板对前牙外伤固定治疗的效果，以便为前牙外伤的临床治疗提供更多更有效的方法。方法：选择10例上前牙外伤患者，应用固定矫治器固定外伤前牙，平面导板解除咬He创伤，时间3个月－10个月，结果：10例患者治疗后均取得满意效果。结论：固定矫治器加平面导板治疗前牙外伤是可靠而有效的。     

小儿肺炎合剂的制备及临床应用

目的 建立小儿肺炎合剂的制备方法及质量控制标准，并初步观察其临床疗效。方法 对处方药物成分进行定性鉴别，并通过给药前后对照考察患儿197例。结果 临床总有效率为94．7％。结论 小儿肺炎合剂对小儿肺炎及急性呼吸道感染有显著疗效。     

远中移动磨牙技术的研究进展

近年来不拔牙矫治重新得到正畸医生的重视,远中移动磨牙开拓间隙在临床上广泛应用,常用的推磨牙向远中方法有活动型、固定型、混合型以及近年来发展迅速的种植体支抗。本文对各种远中移动磨牙技术的进展进行综述。     

片段弓技术联合改良Twin—block矫治器治疗替牙期安氏Ⅱ类2分类错[牙合]

目的观察片段弓技术联合改良Twin-block矫治器在替牙期安氏Ⅱ类2分类错[牙合]中的矫治效果。方法对14例替牙期安氏Ⅱ类2分类错胎患者,先在上颌采用片段弓技术,再重建[牙合]关系,采用改良Twin．block矫治器治疗。以X线头影测量分析法评价疗效。结果矫治后所有患者磨牙关系及尖牙关系均达到中性关系,覆胎、覆盖正常,面部外观明显改善。下颌骨向前调位,下面高增加。结论片段弓技术和改良Twin．block矫治器联合应用治疗替牙期安氏Ⅱ类2分类错[牙合]效果理想。