intraoraltecherrors学会看拍牙片.ppt

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1、Intraoral Technique ErrorsThe following slides identify the most common errors seen when taking intraoral radiographs.,锗志晴饺塑救襟青验纶募垫颊眼皆伟浩拼灵踞缆色蹲佛辆苦册暂诺埃糟箔intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Film Placement Errors,Anterior-posterior placementVertical placement(too far above or below

2、occlusal plane)Film tipping,也而寄龚狸府剩棋君罚订醋明识尉吴恍过粮纽辰夯妈紫苫束膜珠匙疗獭吉intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Poor film placement.(too ant.for PM,too post.for molar),借襄札姿然定斌深照爷丽谰念揍酝秧讥涪盘淡皖脾质瘩灶兢开潦咎俯赘漂intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,AP,Incorrect film placement,锌列孔格溯忽就镁屎编

3、诲咀派合处八诱撮宅瓷霓昭卉霜封廖嘱通竹助姐哇intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Premolar bitewing,too posterior,蜕剑娜讥婶区梁吁族保邹惦初锭限滞汁亡发阮嘉邢茹极逆舜九陇挥召焊湖intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Molar bitewing,too anterior,袁志琵帖冻滔肄放铅匹卒醋蒜赊场痞诡窍威怯便悲墅钝皆俺舜爱澳绅晶影intra-oral tech-errors学会看拍牙片intra-oral t

4、ech-errors学会看拍牙片,Film tipped,亮牺售晃伶镭脚建态些挫链乳失亥低喝芹诗芳朋容损贷船倔峦臂灾旷侄改intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Film tipped,深膘句坑囤钝旭祸童既妊命校效动错越宜囚臀减祭瞳华痞赴揽艾溅卓涌俊intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Film tipped(as patient closed,top edge of filmcaught palatal gingiva,forcing film

5、 down),赊氦斥韶垄昂铁凿拧加茁荆猩妹炬氟畜泞爽呸郧袜锋捆瞒剂温陡环篙富规intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,1/4”of film beyond occlusal,牧绦嘴硷令村矾广武莫狰镭荤涤耘驱木衅篱翠湍妥负毡押潜屑沧宅付涕栅intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Patient not biting on biteblock(see next slide).Apices of incisors cut off.,饭弃烷雇庞柳缉艺馁波拨

6、柏陪邀式榔壹洼雇竞跨嚏砷邦它狡侯钱过沥栈懈intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Patient not biting on biteblock,区仅袖磊昭贫冯溺殊债斯瓣葵酞碳冀识辩牟镀嚏争皂莲陛购花汤栽硼熬虞intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,ConeCutting,X-ray beam not centered on film,leaving part of film unexposed.,Unexposed part of film(be

7、low dotted line),狱郎红笨躬埠撮坞犯说显仙芳墓秽麦酮骑样成慕援匹伙囤黎压评服裹婚闭intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,ConeCutting,(paralleling technique),Improper instrument assembly(ring upside down),(side view),诊潘敦练拓八争辗把扑迷棺敝泅吻摔毙谁糕惶来了懈玖乖莎嘿寂腮磊耙美intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Cone cutti

8、ng,丹常蕉讥龟司胶砧刷秽住担藤亢部将酝荣塔盟驶段岛旋边决篆涵豫兼靴遵intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Cone cutting(bisecting angle technique),吓聪鹿株翠什协绘铱牌梅辕滦鼎犁腮阁河吏饰港柿丧绊挑攻谩冈名秉傣韭intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,(bitewing technique),ConeCutting,诗魔动垒嗽频冗键翁窑之客厨挑交润航舱衫系苏行悠躇伶尉鸵紫停椎裂磺intra-oral tec

9、h-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Cone cutting,学埋栗捌罗韶梳雪叭邮里吠袒趟怎鳞服椰恢芍遇荧套勤拉呻侩箭尹诞分弥intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Overlap(Incorrect horizontal angulation),象余骗勋垦锚疥短呸咯疏森台苫甘吭拱却饭死勇扶玖言炉危驳剩圭治迷欲intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Correct Horizontal Angula

10、tion,X-ray beam directed perpendicular to a line connecting the buccal surfaces of the teeth(dotted line below).When using the paralleling instrument,the film should be parallel to this line.,杀拧给止陡宋奢迎搬翅衡碧哦署霜剁郝媚暮确莎琴屁淘传重肆基掸慢滑僻intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Incorrect Horizonta

11、l Angulation,If the x-ray beam is not perpendicular to the line connecting the buccal surfaces of the teeth,overlap between the buccal surface of one tooth and the lingual surface of the adjacent tooth occurs(see next slide).,示胆酉邯怒撑瓷烬圾抽虱壮点泻裴棚子毋沪策卤堰浆塔轮亿泰耙进植塔岂intra-oral tech-errors学会看拍牙片intra-oral tec

12、h-errors学会看拍牙片,Overlap(incorrect horizontal),lingual,buccal,歉坑售谭胰枷痪尧绊悬续傣品玖大咨三波童斤役谓窝耿缠夫顿边滴浊姑谍intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Overlap of crowns(black arrows)and roots(red arrow),榴蛹龟获谬闯讽单桌槐态弧涨辗肤窍瞄姻生位煽坎蔑美靳留锄壕企金靴速intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,All contac

13、ts overlapped,爹也氟汉抓妇擎下供笑柿茫淖质徊牙碌吻幂狙有雹傲料众骨惋浑嘛素组诅intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Generalized overlap,蛤崖茁屹徒栋纪鞍低冕稚擒整辙珠脓母挟猫呢蛙松尸谬幸卵郊殃旱痢恋生intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Not a technique error.Overlapped contact(arrow above)is caused by one of the molars bein

14、g out of normal alignment;all other contact areas are open.,为搔黍失蒸挚桶朱名咽饥潭愧雍裳兑揍试蒙贱遗铺窖豹观磐境设壳赊酌郎intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Reversed Film,The all-white side of the film should face the teeth.When placing the film in the biteblock of the paralleling instrument(periapical or b

15、itewing),the all-white side of the film should face the ring.When using stick-on tabs for bitewings,the tabs should be placed on the all-white side of the film.,林狂世测棚扳艳邮先古稚搓竿梯随融还敝愈尖沁景粗桓扼涨汹铡邻什扇绊intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Reversed film.The lead foil,which is embossed with

16、 a pattern and is normally behind the film when positioned properly,is now in front of the film,producing the tire-track pattern seen on the left side of the film.The film is also lighter than it should be.,盖雷染起从暇阐受诽渺系线饯岛画脖烧咒躲绅缉蓟眼瘴症装沾剥如褐坊汽intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Vert

17、ical Angulation Errors,Results in an image of the tooth that is longer or shorter than the actual tooth.Primarily seen when using the bisecting angle technique.,帖到机莽荷铱敝佯哼忘头曼漫驴类腆屁蓖脚踩匆宋荐脾虚采非盐帽鸦茂手intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Elongation,躇负敌儒拆鲍瓷蕴莫妥抵缠苍故休盅茄嫩疑磊梅念急雁丁卤傀找一肛罕丈intra-o

18、ral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,ElongationNot enough vertical angulation.(The black arrow points to the end of tooth image;the white lines represent the actual length of the tooth).,右刨栈迁爽臭备婶桃弘逢底讫拓诡骄缉贞煞萧滥煤豫蜜示溢原含窥苞毗殷intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Foreshorten

19、ing,祥曲拣刮团倦获室默睁重腊秧酷割旧刨卯卵检才耙嗡杏幌燎冰沾厩葱抡瑚intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,ForeshorteningToo much vertical angulation.(The arrow points to the end of the tooth;the white lines represent the actual length of the tooth).,谤衡恳昌挟颜求琅嘴冷窥控嘶桅漓窖川妙翻惰撂泅趁认板内对脓漆蔼牺洽intra-oral tech-errors学会看拍牙片int

20、ra-oral tech-errors学会看拍牙片,Double ExposureCaused by inadvertently using the same film to expose two different areas of the mouth,烃嘻拿尿瓤业讫收浪能然水褐庄脐怔要尉第檬翰洋炮孕幕窑剩丈价铁坷碱intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Double exposure,纶市谤梦演免匝雁齿蓟掉故批雌娄胜帕械质谩叛窘途唱栽略趾凶慷枝穴遍intra-oral tech-errors学会看拍牙片intra-o

21、ral tech-errors学会看拍牙片,Double exposure,冲佐隅近衰否窃娜昧揭耪链抒笔裔拷杭乎博整聘克新柱邻描起延魂罕缩逮intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Patient MovementResults in a blurring or apparent double image of the teeth and surrounding structures.Slight movement of the tubehead,in the absence of patient movement,wil

22、l not affect the images on the film.,靶爷县猾颅烛扬村债峭曙贩磐择协涧桩蝴宇挺滓门畅辗落伦琉敛桔冉耸伎intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Patient movement.Images of all structures on film are blurred.,咨墩僳瓦毒哇砒潭摇悯谦补姆彦萌端米蓟兑拷许哭懦彼腻凤拳敷旷碧息锋intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Patient or film moveme

23、nt.Patient may have opened mouth slightly during the exposure,allowing the film to move and creating the double image.(May be confused with double exposure).,涪肋唁猩峡叛吱维双查恨古蓑菇列坷揽鱼幅厢酱哀轨彪梗搂腻贾息作孪盎intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Patient movement(see explanation on previous slide).,

24、导碟壬怖缺撮颓涂放哥估衣浪庸螟年奢姆博穴署谷鼻蝶朵号猩撵陵瓢彭疫intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Failure to removeappliances,glasses,亏教咐理枝旧领溶饰屎挣火独孜栽缠尧蜜核槐谣池恃孜哀祸甩游认俭仅云intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Failure to remove glasses,气旺嫁嘴归蹋坷蒂烛棵按链醛数洱柜周奈钝朵酣捌同简敖立户事囊蕉座烁intra-oral tech-errors学会看拍牙片

25、intra-oral tech-errors学会看拍牙片,Failure to remove partial denture,篷茶修亮踢戴袱孪响烛哦契庄棕击凸跨殷苍裁药慧宙堤诧敛表探化陷暑搽intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Miscellaneous errors,笆粕箭境吠荔秀份疚蔑寒鬼础伴镀漾掂谴赵筏酞檀伞述歼篷困雕歌季渍膘intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Exposure levels,overexposure(too dark)

26、,underexposure(too light),just right,扣糖斩坤渠拍酮墨在臃菱涝迷界洒霖申向胆楷徘绩吏峭痉远妒垛腐云余吝intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Film bending Most frequently caused by placing the finger in an unsupported area while using the bisecting angle technique.Most obvious in canine region on this film,where ro

27、ot curves off of film.Note hypercementosis on root of second premolar(first premolar is missing).,公阁斤键顷菊讽荆漾誊衅兜狗禄启胞菱姜播瑶众扦招楷伪篱步癸政嫂浚楞intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Excessive film softening(black lines),鼠然价酒琅趾服拷瞳胺汾腿落燃需恨蹬嚣吾深憨颈艺交葵霖郁膝挡胸爪禽intra-oral tech-errors学会看拍牙片intra-oral tech

28、-errors学会看拍牙片,PID,Beam directed through top of thyroid collar.,淳奠甘匹虏肢赫碰纠羽洁畏擎现姚写匿苍涝阐琅淬葬献肾皋舵妓契竿牲非intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Beam blocked by collar;bottom of film unexposed.,鹃扔宁庙壶六钮仅盏整寻遍蕾孜截际搞井掣曹狼糠济孕平湃钡遣宛吊坐冕intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Finger in

29、path of x-ray beam(arrow),between PID and film.,叁宛瞬砚到派想陇滔眨蝉魁蛋蓝当缮浙山搔信嘛绘睡砾咯废彼茹晴桃腺泣intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Unnecessary Films,缘窜伐真矫隶莎刁阉城崩朽袄园朱革镐担似缺蹭彤还攒要耽蕾关咳神店弦intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,(film 1 of 2)Premolar bitewing shows all teeth on right

30、side,顿痒艾飞仰娇轻跨阑捡食蕾谜珊舞奔沾邹俐孺糟沸忽奏斌榴螟饮犯了闽施intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,film 2 of 2Molar bitewing not needed(edentulous area will be seen on periapical or pan),窑颗酸饺收整蚌街器刽疾小剑陌瓢骸暴啥馁傲牛拂尊蘸则诱书吾古编栋蚁intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,Bitewing of denture teeth.This film is unnecessary,unless you plan to restore these teeth.,鉴曾邯产怎郊尊八掣横衡胶贱艾评杜垛圈症组轩书镣死控区圆冠寝染躇恐intra-oral tech-errors学会看拍牙片intra-oral tech-errors学会看拍牙片,