CAJ | 학술논문

目的通过测量中国人的牙模型与头颅侧位片分别获得正位和侧位高度、深度以及弧度,以获得国人相关数据,以改进拉钩设计,提高拍摄质量. 方法 2008年5月—2010年5月采用便利抽样法从北京大学口腔医院正畸科选择非拔牙矫治完成治疗的患者247例,均为恒牙 ,无牙齿缺失,第二恒磨牙已经萌出;磨牙关系中性,覆合覆盖正常. 分别在治疗后寄存模型和头颅侧位片上确定尖牙点、磨牙点、上齿槽座点、下齿槽座点,上颌第二磨牙远中面外形高点和下颌第二磨牙远中颈缘点. 测量正、侧位拉钩高度,正位拉钩深度、侧位拉钩后部高度和侧位拉钩深度,测量现有正位拉钩和侧位拉钩的高度与深度,比较模型X线片测量与现有拉钩的测量值. 结果模型与X线测量得到正位拉钩高度和侧位拉钩深度分别为(39.54 ±4.29)mm和(36.18 ±3.26)mm,与现有正位拉钩高度(39.20 mm)以及侧位拉钩深度(34. 41 mm)相似,差异无统计学意义(P>0. 05). 模型和X线测量得到的正位拉钩深度为(12.41 ±2.67)mm,小于现有正位拉钩的深度(16.13 mm),差异有统计学意义(P<0.01);模型和X线测量得到的侧位拉钩的高度为(39. 54 ± 4. 29)mm,大于现有侧位拉钩的高度(31. 16 mm),差异有统计学意义(P<0. 01). 结论国人口腔正位拉钩的深度、侧位拉钩的高度与现有正位拉钩和侧方拉钩不相符,需要根据研究结果设计制作出拉钩实物,在临床适用,并与使用传统拉钩拍摄的面像进行对比,找出不足之处进行改进.
목적 통과측량중국인적아 모형여두로측위편분별획득정위화측위고도、심도이급호도,이획득국인상관수거,이개진랍구설계,제고박섭질량. 방법 2008년5월—2010년5월채용편리추양법종북경대학구강의원정기과선택비발아교치완성치료적환자247례,균위항아 ,무아치결실,제이항마아이경맹출;마아관계중성,복합복개정상. 분별재치료후기존모형화두로측위편상학정첨아점、마아점、상치조좌점、하치조좌점,상합제이마아원중면외형고점화하합제이마아원중경연점. 측량정、측위랍구고도,정위랍구심도、측위랍구후부고도화측위랍구심도,측량현유정위랍구화측위랍구적고도여심도,비교모형X선편측량여현유랍구적측량치. 결과 모형여X선측량득도정위랍구고도화측위랍구심도분별위(39.54 ±4.29)mm화(36.18 ±3.26)mm,여현유정위랍구고도(39.20 mm)이급측위랍구심도(34. 41 mm)상사,차이무통계학의의(P>0. 05). 모형화X선측량득도적정위랍구심도위(12.41 ±2.67)mm,소우현유정위랍구적심도(16.13 mm),차이유통계학의의(P<0.01);모형화X선측량득도적측위랍구적고도위(39. 54 ± 4. 29)mm,대우현유측위랍구적고도(31. 16 mm),차이유통계학의의(P<0. 01). 결론 국인구강정위랍구적심도、측위랍구적고도여현유정위랍구화측방랍구불상부,수요근거연구결과설계제작출랍구실물,재림상괄용,병여사용전통랍구박섭적면 상진행대비,조출불족지처진행개진.
Objective To measure Chinese occlusion cast and skull lateral projection to acquired height, depth and arch of normotopia and lateral position, so as to obtain the data of national people for improvement of dental retracter and enhancing photography quality. Methods From May 2008 to May 2010 in Department of Orthodontics Peking University School and Hospital of Stomatology, a total of 247 cases were selected by convenient sampling method. The patients selected completed nonextraction treatment and had all permanent teeth without loss of tooth and second accessional teeth dentia already, and their molar relationship was neutral, and their overbite and overlap were normal. After treatment, we ensured fang′s point, molar point, subspinable, supramentale, maxillary second molar distal to the surface profile and mandibular second molar distal to the neck point by deposit model and skull lateral projection. The dental retracter height and depth of normotopia and lateral position, and we compared the measurement values of dental retracter between existed retracter and retracter model by X-ray. Results The model and X-ray measured depth of normotopia and lateral position, which were (39. 54 ± 4. 29) mm and (36. 18 ± 3. 26) mm compared with a similar size 39. 20 mm and 34. 41mm of existed retracter (P>0. 05). The model and X-ray measured the height of model′s normotopi, which was (12.41 ±2.67) mm and was smaller than 16.13 mm of existed one (P<0.01); the model and X-ray measured the height of lateral position, which was (39. 54 ± 4. 29) mm and bigger than the existed one (31. 16 mm) (P<0. 01). Conclusions The national dental retracter depth of normotopia and height of lateral position are discrepant with existed dental retracter, so it requires to design material retracter for clinical use, and compare with traditional retracter′s surface of image to find out the shortages and improve.