天津医药
天津醫藥
천진의약
TIANJIN MEDICAL JOURNAL
2014年
3期
268-270
,共3页
颅骨%面部%测颅法%骨和骨组织%磨牙,第三%下颌骨%颌%牙间隙%人体测量术
顱骨%麵部%測顱法%骨和骨組織%磨牙,第三%下頜骨%頜%牙間隙%人體測量術
로골%면부%측로법%골화골조직%마아,제삼%하합골%합%아간극%인체측량술
skull%face%cephalometry%bone and bones%molar,third%mandible%jaw%diastema%anthropometry
目的：比较不同矢状骨面型患者下颌磨牙后间隙（RMS）特征，探讨其与下颌智齿阻生的关系。方法选取25～35岁90例正畸患者，治疗前拍摄全景片、头颅定位侧位片。选择下颌平面角（FH-MP）大小为均角患者，按照头影测量分析ANB角度大小分为安氏Ⅰ类、Ⅱ类、Ⅲ类3组。分别通过全景片观察每组下颌智齿阻生或萌出情况并将其分为阻生组和萌出组。分别测量每组患者以下指标：下颌体长度、下颌角角度、RMS。比较下颌磨牙后间隙与特定的矢状骨面型特征。结果矢状Ⅱ类患者RMS小于矢状Ⅲ类，阻生组的RMS小于萌出组。矢状Ⅲ类患者下颌角角度较大（P＜0.05），萌出状态对下颌角角度无影响（P＞0.05），而阻生组患者下颌体长度较小（P＜0.05）。结论不同矢状骨面型形态特征与下颌智齿的阻生有关，下颌体短且磨牙后间隙减小的患者更易阻生。
目的：比較不同矢狀骨麵型患者下頜磨牙後間隙（RMS）特徵，探討其與下頜智齒阻生的關繫。方法選取25～35歲90例正畸患者，治療前拍攝全景片、頭顱定位側位片。選擇下頜平麵角（FH-MP）大小為均角患者，按照頭影測量分析ANB角度大小分為安氏Ⅰ類、Ⅱ類、Ⅲ類3組。分彆通過全景片觀察每組下頜智齒阻生或萌齣情況併將其分為阻生組和萌齣組。分彆測量每組患者以下指標：下頜體長度、下頜角角度、RMS。比較下頜磨牙後間隙與特定的矢狀骨麵型特徵。結果矢狀Ⅱ類患者RMS小于矢狀Ⅲ類，阻生組的RMS小于萌齣組。矢狀Ⅲ類患者下頜角角度較大（P＜0.05），萌齣狀態對下頜角角度無影響（P＞0.05），而阻生組患者下頜體長度較小（P＜0.05）。結論不同矢狀骨麵型形態特徵與下頜智齒的阻生有關，下頜體短且磨牙後間隙減小的患者更易阻生。
목적：비교불동시상골면형환자하합마아후간극（RMS）특정，탐토기여하합지치조생적관계。방법선취25～35세90례정기환자，치료전박섭전경편、두로정위측위편。선택하합평면각（FH-MP）대소위균각환자，안조두영측량분석ANB각도대소분위안씨Ⅰ류、Ⅱ류、Ⅲ류3조。분별통과전경편관찰매조하합지치조생혹맹출정황병장기분위조생조화맹출조。분별측량매조환자이하지표：하합체장도、하합각각도、RMS。비교하합마아후간극여특정적시상골면형특정。결과시상Ⅱ류환자RMS소우시상Ⅲ류，조생조적RMS소우맹출조。시상Ⅲ류환자하합각각도교대（P＜0.05），맹출상태대하합각각도무영향（P＞0.05），이조생조환자하합체장도교소（P＜0.05）。결론불동시상골면형형태특정여하합지치적조생유관，하합체단차마아후간극감소적환자경역조생。
Objective To compare the retromolar space (RMS) between different antero-posterior (A-P) skeletal patterns, and explore the relationship between the status of third molar eruption/impaction with the different A-P skeletal patterns. Methods A total of 90 orthodontic patients (25-35 years old) were investigated from dental pantomograms (DPTs) and lateral cephalograms (LC). The subjects were divided into three groups according to their ANB angle:skeletal classⅠ, skeletal classⅡ, and skeletal classⅢ. Each group was subdivided into impacted and erupted subgroups. Values of DPT and LC were traced, and the following variables were measured including mandibular body length, third molar angulation and ret-romolar space width. Results The retromolar space width was significantly smaller in classⅡsubjects than that in classⅢsubjects, and RMS was significantly smaller in impacted group than that in erupted group, respectively (P<0.05). There was no significant difference in the mandibular angle in erupted subgroup (P<0.05). There was a smaller mandibular body length in impacted subjects (P<0.05). Conclusion There is a relationship between different morphological characteristics of sagittal skeletal pattern and the impacted status. Patients with shorter mandibular body length and decreased RMS width are more inclined to impaction.
