Treatment of skeletal Cl II includes functional orthopedic treatment, head-gears, extraction of the upper premolars and orthognathic surgery. To treat any patient with functional appliances (bite jumping) an adequate ...Treatment of skeletal Cl II includes functional orthopedic treatment, head-gears, extraction of the upper premolars and orthognathic surgery. To treat any patient with functional appliances (bite jumping) an adequate overjet is necessary. In this case an 11 years old female patient has skeletal CLII due to mandibular deficiency with ANB angle 8 degrees, overbite: 3 mm, overjet: 1 mm, extremely convex profile and underdeveloped chin due to the hyper muscle contraction of the lower lip to obtain oral seal. To obtain an adequate overjet lower first premolars were extracted and maximum retraction using mini screws (for maximum anchorage) was applied. Afterwards Rahhal functional appliance was used by the patient 16 hours a day for 6 months and 10 hours a day for another 6 months for retention. After that fixed orthodontic treatment was completed. Lateral cephalometrics were taken, traced and analyzed. In the result Skeletal CLI was obtained (ANB 4 degree), straight facial profile, normal over bite overjet and particular chin development were noticed. As a conclusion, in skeletal CLII malocclusions, lower incisor protrusion will cause a contraindication for functional treatment. Extraction of the lower premolars and retraction of the lower incisors followed by functional orthopedic treatment is an efficient method to treat these cases instead of waiting for orthognathic surgery, also reducing the muscle pressure on the chin will change the development characteristics of it.展开更多
目的:利用SanderⅡ功能矫治器的腭导杆、上颌镍钛螺旋扩弓簧和下颌扩弓簧、分体式的独特设计,矫治Angl eⅡ类1分类患者生长高峰前期或高峰期、替牙晚期或恒牙早期的深覆牙合、深覆盖患者。方法:病例纳入标准为Angl eⅡ类1分类生长高峰...目的:利用SanderⅡ功能矫治器的腭导杆、上颌镍钛螺旋扩弓簧和下颌扩弓簧、分体式的独特设计,矫治Angl eⅡ类1分类患者生长高峰前期或高峰期、替牙晚期或恒牙早期的深覆牙合、深覆盖患者。方法:病例纳入标准为Angl eⅡ类1分类生长高峰前期或高峰期、替牙晚期或恒牙早期的深覆牙合、深覆盖患者,下颌平面角为均角或底角。共有13人配戴SanderⅡ功能矫治器1年,拍治疗前后头颅定位侧位片。用西安交通大学口腔医院正畸科X线头影测量分析方法分析治疗前后X线测量数据,并用SPSS18.0软件配对t检验进行统计学处理。结果:ANB°、ANS-Pt m、Co-Pg、U1-APg、L1-NB距、L1-NB角、L6-MP、UL-El i ne、∠N'-Sn-Pg<0.01有非常显著统计学意义;Wi t s值、NA-Pg、U1-SN角、U6-PP、∠N'-Pg'-FH,P<0.05有显著统计学意义。结论:上下颌骨相对位置改变明显,导下颌前伸明显、上颌基骨长度有增长;下颌基骨长度增长显著;面凸角变小;上颌前牙内收明显,上下第一磨牙伸长,下面高增长,但相对全面高协调。软组织上唇突度减小、颏部前移,软组织侧貌与骨组织改建一致。展开更多
文摘Treatment of skeletal Cl II includes functional orthopedic treatment, head-gears, extraction of the upper premolars and orthognathic surgery. To treat any patient with functional appliances (bite jumping) an adequate overjet is necessary. In this case an 11 years old female patient has skeletal CLII due to mandibular deficiency with ANB angle 8 degrees, overbite: 3 mm, overjet: 1 mm, extremely convex profile and underdeveloped chin due to the hyper muscle contraction of the lower lip to obtain oral seal. To obtain an adequate overjet lower first premolars were extracted and maximum retraction using mini screws (for maximum anchorage) was applied. Afterwards Rahhal functional appliance was used by the patient 16 hours a day for 6 months and 10 hours a day for another 6 months for retention. After that fixed orthodontic treatment was completed. Lateral cephalometrics were taken, traced and analyzed. In the result Skeletal CLI was obtained (ANB 4 degree), straight facial profile, normal over bite overjet and particular chin development were noticed. As a conclusion, in skeletal CLII malocclusions, lower incisor protrusion will cause a contraindication for functional treatment. Extraction of the lower premolars and retraction of the lower incisors followed by functional orthopedic treatment is an efficient method to treat these cases instead of waiting for orthognathic surgery, also reducing the muscle pressure on the chin will change the development characteristics of it.
文摘目的:利用SanderⅡ功能矫治器的腭导杆、上颌镍钛螺旋扩弓簧和下颌扩弓簧、分体式的独特设计,矫治Angl eⅡ类1分类患者生长高峰前期或高峰期、替牙晚期或恒牙早期的深覆牙合、深覆盖患者。方法:病例纳入标准为Angl eⅡ类1分类生长高峰前期或高峰期、替牙晚期或恒牙早期的深覆牙合、深覆盖患者,下颌平面角为均角或底角。共有13人配戴SanderⅡ功能矫治器1年,拍治疗前后头颅定位侧位片。用西安交通大学口腔医院正畸科X线头影测量分析方法分析治疗前后X线测量数据,并用SPSS18.0软件配对t检验进行统计学处理。结果:ANB°、ANS-Pt m、Co-Pg、U1-APg、L1-NB距、L1-NB角、L6-MP、UL-El i ne、∠N'-Sn-Pg<0.01有非常显著统计学意义;Wi t s值、NA-Pg、U1-SN角、U6-PP、∠N'-Pg'-FH,P<0.05有显著统计学意义。结论:上下颌骨相对位置改变明显,导下颌前伸明显、上颌基骨长度有增长;下颌基骨长度增长显著;面凸角变小;上颌前牙内收明显,上下第一磨牙伸长,下面高增长,但相对全面高协调。软组织上唇突度减小、颏部前移,软组织侧貌与骨组织改建一致。
