不同垂直骨面型对青年女性面部侧貌美学评价的意义

背景：不同垂直骨面型的软硬组织发育特点不同已被证实,它提示着患者的发育倾向和需要对支抗的控制程度。目的：评价不同垂直骨面型对面部侧貌美学评价的影响,分析不同评价人群对3种垂直骨面型侧貌感知是否一致。方法：根据投影测量数据及正畸医生的审美,选取高、均、低角骨面型美貌成年女性患者各1例,要求黄色人种、双侧颜面部基本对称、无颌面部其他软硬组织疾病、以往未接受正畸及正颌治疗。收集其面部侧貌图像,利用Dolphin Imaging图像处理软件仅在矢状向做2 mm小范围移动交替改变双唇及颏部突度,使之生成每组25张照片。15位正畸医生以＂可接受面部侧貌＂为筛选条件,最后每组选出11张面部侧貌图。由50名正畸患者家长、50名成年正畸患者和50名外行人作为评价者分别对其行主观美学评价,并于面部侧貌评价结束后对垂直骨面型是否影响面部侧貌美观作出评价。结果与结论：评价者对不同垂直骨面型的直面型侧貌都表示喜爱,评价者还认为颏部稍前突的均角型侧貌、颏部稍后缩的高角型侧貌、下颌稍突或唇部稍后缩的低角型侧貌是美观的。男性和女性间评价结果一致性较高,大多数评价者更喜爱均角和高角的垂直骨面类型。结果表明评价者对不同垂直骨面型侧貌的审美有差别,男性和女性对不同垂直骨面型面部侧貌的审美具有高度一致性,垂直骨面型对评价侧貌美观有影响,大多数评价者更喜爱均角和高角的垂直骨面类型。     

手术优先治疗牙颌面畸形的研究进展

手术优先方法(SFA)治疗牙颌面畸形,初期的正颌外科手术即可令患者的面部畸形得到明显的改善,缩短疗程,而后期的正畸治疗也变得经济和有效.SFA治疗激活了骨组织中相应的破骨和成骨活性,加速了骨的分解和合成代谢,加速了骨改建.相对于传统的正畸-正颌联合治疗,SFA不仅省掉了术前正畸治疗,且在模型外科和正畸设计方面亦有不同.虽然SFA治疗可快速改善患者面形,缩短疗程,但其前瞻性研究和动物试验却相对较少.对于SFA治疗后的临床效果和长期稳定性的相关研究也相对匮乏,特别是在术后骨愈合阶段,不稳定的咬合妨碍上下颌骨处于理想位置而影响其稳定性,从而可能使复发率增加.SFA能否取代传统的正畸-正颌-正畸联合治疗,是一时的流行还是正颌外科领域中的一种模式转变,值得进一步探讨.     

Maxillary canine–first premolar bilateral transposition in a Class III patient: A case report

Tooth transposition is a rare dental anomaly that often represents a challenge for the clinician. The case of a girl with skeletal Class III malocclusion and concomitant maxillary canine–first premolar bilateral transposition, followed from 7 to 17 years of age, is presented. After a first phase of treatment aimed at resolving the Class III malocclusion, the transposition was maintained and the case finalized with a multibracket appliance.     

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??Objective    To evaluate the clinical appearance and periodontal status of impacted maxillary central incisors that had been exposed and aligned after a closed-eruption orthodontic surgical technique. Methods    The subjects consisted of 18 patients who were treated in  Stomatology Hospital of Yantai from 2011 to 2015. Examinations were done after orthodontic treatment for the unilateral labially impacted maxillary central incisors 3 months after retention. The clinical and radiographic variables were compared by SPSS 17.0 software package. Results    The treated central incisors showed no significant difference in plaque and gingival indexes??width of attach gingival or pocket depth??whereas a small but statistically significant increase was found in the clinical crown lengths. The bone support was reduced in the treated incisors??whereas in 4 of the control central incisors??abnormal gingival contour was recorded. Conclusion    This study demonstrates that the overall esthetic and periodontal results can be achieved by treating impacted maxillary central incisors with a closed-eruption orthodontic surgical technique. However??a long term follow-up study on the esthetic outcome is recommended.     

牙槽性上颌前突伴牙列拥挤的外科正畸

目的：研究牙槽性上颌前突伴牙列拥挤牙错位、扭转的手术矫正。方法：选择３５例此类畸形的大龄青年，运用上颌前分截骨矫正的理论，结合单个牙外科正畸的方法并加以改进强调术中应 特别注意对唇侧膜蒂的保护。结果；全部病例伤口愈合良好，无骨不连，骨坏死发生，牙齿无松动。结论：这种手术方法使上颌前突伴牙列拥挤的大龄青年在短期内恢复正常的牙弓形状和咬Ｈｅ关系，面容得到明显的改善。     

Reducing the incidence of unerupted palatally displaced canines by extraction of deciduous canines. The history and application of this procedure with some case reports

The procedure of extracting the deciduous canine to reduce the incidence of the unerupted palatally displaced canine was first described in 1951, and an article solely devoted to the technique appeared in 1959. The procedure then virtually vanished until 1981. A prospective study published in 1988 created the first widespread interest in the method which now appears in major texts. Why the procedure succeeds is uncertain. In the 1950s nonresorption of the deciduous canine was thought to cause palatal deflection of its successor and therefore it appeared appropriate to extract the obstructing deciduous tooth. It has been estimated that the technique should be successful in approximately one in three of all cases in the population aged 10 to 13 years. The earlier the detection the better the prognosis, because the unerupted canine frequently moves more mesially with time. Before the procedure is attempted it is important to discuss possible outcomes with the patient. Three successfully treated cases are illustrated. The first conformed with the guidelines of having an uncrowded maxillary arch and being aged between 10 and 13 years. The second was aged 15 years 2 months at commencement. An unsuccessful surgical exposure of the permanent canines followed by extraction of the deciduous canines was carried out in the third case.