恒牙初期安氏Ⅲ类错软组织侧貌特征的X线头影测量及软硬组织相关性分析

目的:探讨恒牙初期安氏Ⅲ类错软组织侧貌特征,分析硬组织改变对软组织侧貌的影响。方法:选择恒牙初期正常、安氏III类错青少年各50名,确定22项常用的软组织侧貌测量指标和9项硬组织测量指标进行X线头影测量。结果:除9项软组织测量值和1项硬组织测量值外,其余软硬组织测量值均有显著性差异(P<0.01)。多因素判别分析筛选出LsNsLi、CmSnLs、NsLi-FH、Ls-E、Li-E5项主要软组织指标。软硬组织有显著相关性(P<0.05)。结论:III类错青少年软组织侧貌明显异常,最敏感的、最能体现III类错软组织侧貌异常的有5项软组织指标。正畸临床中可有针对性的纠正硬组织异常来改善软组织不调。     

恒牙初期安氏Ⅱ类错软组织侧貌特征的X线头影测量及软硬组织相关性分析

目的:通过X线头影测量,探讨恒牙初期青少年安氏Ⅱ类错牙合软组织侧貌特征,分析硬组织改变对软组织侧貌的影响。方法:选择恒牙初期正常牙合、安氏Ⅱ类错牙合青少年各50名,确定22项常用的软组织侧貌测量指标和9项硬组织测量指标进行X线头影测量。结果:除3项软组织测量值和2项硬组织测量值外,其余软硬组织测量值均有显著性差异(P<0.01)。多因素判别分析筛选出5项主要软组织指标。软硬组织测量指标有显著相关性(P<0.05)。结论:Ⅱ类错牙合青少年软组织侧貌明显异常,B’Li-FH、NsLs-FH、LiNsPg’、Li-E、CmSnLs是最敏感、最能体现Ⅱ类错牙合软组织侧貌异常的5项软组织指标。正畸临床中可有针对性地纠正硬组织异常来改善软组织不调。     

恒牙初期安氏Ⅲ类错(牙合)软组织侧貌特征的X线头影测量及软硬组织相关性分析

目的：探讨恒牙初期安氏Ⅲ类错[牙合]软组织侧貌特征，分析硬组织改变对软组织侧貌的影响。方法：选择恒牙初期正常[牙合]、安氏Ⅲ类错[牙合]青少年各50名，确定22项常用的软组织侧貌测量指标和9项硬组织测量指标进行x线头影测量。结果：除9项软组织测量值和1项硬组织测量值外，其余软硬组织测量值均有显著性差异（P〈0．01）。多因素判别分析筛选出LsNsLi、CmSnLs、NsLi—FH、Ls—E、Li—E5项主要软组织指标。软硬组织有显著相关性（P〈0．05）。结论：Ⅲ类错[牙合]青少年软组织侧貌明显异常，最敏感的、最能体现Ⅲ类错[牙合]软组织侧貌异常的有5项软组织指标。正畸临床中可有针对性的纠正硬组织异常来改善软组织不调。     

恒牙初期安氏Ⅱ类错(牙合)软组织侧貌特征的X线头影测量及软硬组织相关性分析

目的：通过X线头影测量,探讨恒牙初期青少年安氏Ⅱ类错[牙合]软组织侧貌特征,分析硬组织改变对软组织侧貌的影响。方法：选择恒牙初期正常[牙合]、安氏Ⅱ类错[牙合]青少年各50名,确定22项常用的软组织侧貌测量指标和9项硬组织测量指标进行X线头影测量。结果：除3项软组织测量值和2项硬组织测量值外,其余软硬组织测量值均有显著性差异（P＜0．01）。多因素判别分析筛选出5项主要软组织指标。软硬组织测量指标有显著相关性（P＜0．05）。结论;Ⅱ类错[牙合]青少年软组织侧貌明显异常,B’Li-FH、NsLs-FH、LiNsPg’、Li—E、CmSnLs是最敏感、最能体现Ⅱ类错[牙合]软组织侧貌异常的5项软组织指标。正畸临床中可有针对性地纠正硬组织异常来改善软组织不调。     

双颌手术后颜面软组织侧貌改变的研究

目的 研究下颌前突伴上颌骨发育不全患者术后颜面软组织侧貌改变.方法 对20例下颌前突伴上颌骨发育不足病例进行术前后Χ线头影测量研究,用SPSS软件对测量值进行统计分析.结果 下唇突点(LI点)、颏唇沟点(Si点)软组织颏前点(PG点)分别以下中切牙点(li点)下牙槽座点(B点)硬组织颏前点(pg点)的92%、97%、92%后移而后移,并得出了相应的回归方程.结论 上颌软硬组织改变无明显相关性,下颌软硬组织改变有非常显著相关性.     

上颌单颌拔牙与双颌拔牙矫治安氏Ⅱ类1分类错(牙合)的软硬组织对比研究

目的探讨上颌单颌拔牙与双颌拔牙矫治安氏Ⅱ类1分类错(牙合)的软硬组织改变的差异.方法选择安氏Ⅱ类1分类患者33例,其中上颌拔除2个前磨牙(甲组)18例,双颌拔除4个前磨牙(乙组)15例,应用X线头影测量技术对其矫治前后的软硬组织的变化进行测量,分析其测量结果.结果两组SNA、SNB、ANB矫治前后的变化无明显差异.乙组上切牙内收与上唇的变化更为显著,颏前点明显前移,下唇凸度明显减小,乙组面型突度变较甲组更为显著.结论上颌单颌拔牙适用于下唇和下切牙凸度小、下颌无拥挤或轻度拥挤的轻中度骨性和牙源性的安氏Ⅱ类1分类患者;双颌拔牙适用于中重度拥挤的中度骨性和牙源性的安氏Ⅱ类1分类患者.     

110例上海地区正常Ya汉族成人软组织侧貌的X线头影测量分析…

本文对上海正常Ｙａ成人作了软组织侧貌的影测量分析，认为侧貌形态的数值化测量，较目测哐照片提供了更为可靠的疗效评价依据，其测量指标，对正颌外科手术设计，有重要的参考价值，甚至具有决策作用。     

上颌单颌拔牙与双颌拔牙矫治安氏Ⅱ类1分类错的软硬组织对比研究

目的 探讨上颌单颌拔牙与双颌拔牙矫治安氏Ⅱ类1分类错(牙合)的软硬组织改变的差异。方法 选择安氏Ⅱ类1分类患者33例,其中上颌拔除2个前磨牙(甲组)18例,双颌拔除4个前磨牙(乙组)15例,应用X线头影测量技术对其矫治前后的软硬组织的变化进行测量,分析其测量结果。结果 两组SNA、SNB、ANB矫治前后的变化无明显差异。乙组上切牙内收与上唇的变化更为显著,颏前点明显前移,下唇凸度明显减小,乙组面型突度改变较甲组更为显著。结论 上颌单颌拔牙适用于下唇和下切牙凸度小、下颌无拥挤或轻度拥挤的轻中度骨性和牙源性的安氏Ⅱ类1分类患者;双颌拔牙适用于中重度拥挤的中度骨性和牙源性的安氏Ⅱ类1分类患者。     

249名广西壮族正常He人软组织侧貌计算机辅助X线头影测量研究

通过计算机辅助测量系统得出２４０名广西壮族正常Ｈｅ人软组织侧貌Ｘ线头影测量结果，分析研究发现，壮族人软组织面型，唇形均为前突形，且随年龄增长侧貌凸度愈明显，男性侧凸度大于女性，性别差异出现早而显著，软组织各部份厚度不尽相同，硬组织间存在一定的补偿机制，各地区人软组织侧貌比较中，以壮族人软组织侧貌最突，以下依次为北京人，上海人和哈尔滨人。     

110例上海地区正常合汉族成人软组织侧貌的X线头影测量分析研究

本文对上海地区正常胎成人作了软组织侧貌的头影测量分析，认为侧貌形态的数值化测量，较目测或照片提供了更为可靠的疗效评价依据，其测量指标，对正颌外科手术设计，有重要的参考价值，甚至具有决定作用。     

Long-term effect of the chincap on hard and soft tissues.

The short- and long-term effects of the chincap used in combination with a removable appliance to procline upper incisors were analysed cephalometrically in 23 patients with Class III malocclusions. The overall changes were compared with growth changes in a closely matched control sample of untreated Class III patients. There was no evidence that the chincap retarded growth of the mandible. During treatment, there was an increase in mandibular length and facial height. The lower incisors retroclined and the upper incisors proclined. The incisor relationship was corrected. Soft tissue changes included an increase in nasolabial angle and improvement in soft-tissue profile, including the nose. Skeletal post-treatment changes included further mandibular growth associated with an increase in angle SNB and Wits measurement. Facial height also increased significantly. The Class I overjet was maintained, although slightly diminished. The soft tissue nose, upper and lower lip, and chin moved anteriorly, and the nasal tip and chin moved inferiorly. At the end of the study period there were no significant skeletal or soft tissue differences between the treated and control groups. The only significant contrasts were in the overjet and the overbite. Chincap therapy combined with an upper removable appliance to procline the upper incisors is effective in producing long-term correction of the incisor relationship by retroclination of lower incisors, proclination of upper incisors, and redirection of mandibular growth in a downward direction. The direction of growth at the chin is maintained subsequent to treatment, as are the changes in incisor inclination, although in diminished form. There are corresponding improvements in the soft tissue profile.     

Headgear—activator治疗下颌后缩的软硬组织变化及相关分析

目的：研究安氏Ⅱ^1错[牙合]畸形应用Headgear-activator矫治器治疗前后软硬组织的变化及其相关性。方法：选择生长发育高峰期的50例安氏Ⅱ^错[牙合]病例,分为治疗组27例,采用Headgear-activator矫治器治疗,对照组23例不进行治疗,定期参加随访,对两组病例治疗前后拍摄X线头颅定位侧位片,对所测角度和线距计算x±s,利用配对t检验比较测量指标的变化,对特定的软硬组织测量指标进行相关分析。结果：大部分指标都发生了明显变化,与对照组比较差异均有统计学意义（P〈0．05）;A＇Ls—FH、NsPg＇-FH、Z angle和GSnPg’的变化与颌骨位置和上切牙倾斜度的相关性明显（P〈0．05）。结论：Headgear—activator可明显改善下颌后缩患者软组织侧貌,其改变主要源于下颌的前伸和上切牙的直立。     

The dentin–pulp border: a dynamic interface between hard and soft tissues

The dentin–pulp border is a dynamic interface where odontoblasts form the organic matrix and mineralize it to form dentin. Even though dentin and odontoblasts are often compared to other mineralized tissues (bone and osteoblasts), dentin is in many ways a unique tissue, and odontoblasts are unique cells with distinct morphological and functional differences from osteoblasts. Unlike osteoblasts, odontoblasts may remain vital for the person's lifetime. Dentin formation and mineralization is also in some ways different from the bone formation. Dentin contains dentinal tubules that may be patent all the way from the dentin–enamel junction to the dentin–pulp border, making dentin (and pulp tissue) theoretically accessible to oral microbes and other noxious stimuli during or immediately after the destruction of enamel or cementum covering dentin. Odontoblasts are the first cells facing the external milieu (oral cavity), and together with the pulp tissue they must be able and ready to react to external microbial or other irritations. Recent discoveries actually indicate that odontoblasts are better equipped to respond to external stimuli than previously believed. In addition to forming dentin, odontoblasts may have sensory functions, and they may also sense and respond to microbial antigens in much the same manner as immunological cells. Both of these functions indicate that odontoblasts are more active in the regulation of the defensive reactions of the dentin–pulp complex, including fine‐tuning pulp inflammatory reactions. The aim of this review is to provide an update on the current knowledge of the different aspects of dentinogenesis, as well as the potential roles of odontoblasts on other functions in the dentin–pulp complex.     

同种异体供牙软硬组织免疫原性的比较研究

目的比较同种异体供牙软硬组织免疫原性的强弱。方法采用Ba_1b／c和C_57BL／b两种主要组织相容性复合体（MHC）完全不相同的近交系小鼠作为实验动物模型，对异体供牙软硬组织的免疫原性进行研究。通过现代免疫法检测宿主的细胞介导的细胞杀伤（CMC）、抗体－补体介导的细胞杀伤（ACMC）水平。结果异体牙移植后，含牙髓牙周膜的异体牙（A）引起的CMC和ACMC与含牙髓的异体牙（B）以及与异体牙硬组织（C）引起的CMC和ACMC两两比较存在显著性差异（A与B：P＜0．05；A与C：P＜0.01；B与C：P＜0.01）。结论异体供牙软硬组织均有免疫原性含牙髓；牙周膜牙免疫原性最强，含牙髓牙次之，牙硬组织免疫原性最弱，但能引起宿主免疫排斥反应。