乳牙遲遲不退應檢查恒牙胚

1、乳牙遲遲不退應檢查恒牙胚網(wǎng)傳貴州一 24歲小伙乳牙滯留，令其多年來只能喝湯不能吃肉。專 家稱引起乳牙遲遲不退原因很多，這個小伙的病情來推斷，有可能是因為 恒牙胚缺失導致的。一般來說兒童在46歲以后開始進行乳牙脫落，恒牙萌出的過程。這 個過程一般持續(xù)到12歲以后。但是根據(jù)兒童的發(fā)育情況和飲食生活情況 的不同，可能略有提前或者延遲。臨床上我們經(jīng)常見到的是個別牙位的乳 牙滯留、恒牙萌出位置異常等情況。換牙延遲的原因有很多，可能是個休 發(fā)育的差異性造成，也有可能是天生恒牙胚缺失等原因。牙齒脫落循序漸進有的兒童在四歲左右就開始換牙，但有些兒童甚至延遲到9歲以后才 開始。另外有些乳牙滯留造成恒牙不能正常萌

2、出，可能在異常的位置萌出, 造成牙齒排列不齊。乳牙脫落是由于恒牙胚發(fā)育到一定程度，向齦向萌出，壓迫乳牙牙根, 造成乳牙牙根吸收，促使乳牙脫落。如果先天性恒牙胚缺失，缺少對乳牙 根的壓迫，因此并沒有造成乳牙根吸收，這樣乳牙還是可以比較長時間地 保留在體內(nèi)。但是由于乳牙的大小和結(jié)構(gòu)性問題，其承擔咀嚼功能和耐受 咬合力的能力與恒牙比有一定差距，因此造成報道里該患者的生活困擾。補鈣不能使牙齒生長速度加快不少家長認為自己孩子牙齒長得慢就是因為缺鈣惹的禍。但是研究證實補鈣與出牙快慢，兩者沒有直接關(guān)系。如果孩子全身缺鈣，可能會對長 牙有影響，但更會對全身影響更明顯。影響出牙早晚的主耍因素是基因，身體發(fā)育狀況

3、、營養(yǎng)狀況、飲食習 慣等，也會對出牙有一些影響。實際上，從牙科的角度來說，早點晚點出 牙都不是問題。如果太晚了，比如到一歲還沒有長牙，可能會有一些潛在 的疾病，比如說一些基因上的疾病，會導致牙齒的晚生。此時建議家長帶 孩了去做全科檢查。孩子出生時，口腔內(nèi)沒有牙齒，出生后約6個月，下頜中切牙開始萌 出，直到2歲半乳牙全部萌出。寶寶出生后1年內(nèi)（15個月個月）所有 乳牙釉質(zhì)礦化完成，出生后2年內(nèi)（6個月24個月）所有乳牙萌出。恒牙：是繼乳牙脫落后的第二付牙齒，脫落后不再萌出?？谇粌?nèi)共有 恒牙32個，每側(cè)各16個。約在六歲左右，第一恒磨牙萌出，此時為混合 牙列期的開始。大約到12歲左右乳牙全部被恒牙

4、所替換，則混合牙列期 結(jié)朿。日常生活中，父母要了解兒童換牙的標準吋間和換牙的順序，如果發(fā) 現(xiàn)乳牙未在正常的時間萌出或者未在正常的位置萌出，建議還是到專業(yè)的 兒童牙科進行檢查。但由于個體情況有很大差異，因此并不能確定距離標準時間多久未換牙才算是不正常。 因此如果父母對此類問題有懷疑時可以到醫(yī)院就診。遲遲未換牙的孩子首先應該做牙齒的x光牙片檢查，檢查一下是否乳 牙下方有恒牙胚的存在以及恒牙胚的發(fā)育情況。如果恒牙胚距離乳牙還有 一定距離，可能由于發(fā)育較慢的原因。如果恒牙胚上方乳牙根已吸收，但 并未在正常時間萌出，可以考慮拔除乳牙幫助恒牙萌出。如果恒牙胚缺失, 可以考慮暫時保存乳牙，為成年后修復治療保

5、存修復空間。因此只有確定 了未換牙的原因，才能針對不同的情況作出相應的治療。network transmission of a guizhou 24 year old guy retained deciduous teeth, somany years only soup can't eat meat. experts say the cause of deciduous teeth did notreturn for many reasons, this guy's condition to infer, probably because of the abs

6、enee of the permanent teeth .in general children in 4-6 years later began shedding of deciduousteeth, toothadorable out process. this process normally continues until after the age of12. but according to the development of children's diet and life situation is different, may be slightly in a

7、dvanee or delay. clinically, we often see is the in dividual tooth bit retai ned deciduous teeth, tooth adorable position abnormal situation. there are many reasons for changing delay, may be caused by differe nces of in dividual developme nt, also has the possibility is the in born deficiency of pe

8、rma nent tooth . tooth loss step by some of the children started teething at about age four, but some children evendelayed until 9 years later. in addition some deciduous teeth can not be causedbynormal adorable, may be in the position of adorable anomaly, causedby irregular teeth arrangement.sheddi

9、ng of deciduous teeth is due to the permanent tooth germ development to a certain extent, to the gingiva to adorable, oppression of deciduous teeth, cause rootresorpti on, the sheddi ng of deciduous teeth .if the congen ital abse nee of permanent tooth germ, the lack of primary root of oppression, a

10、nd therefore did not cause theprimary root resorption of deciduous teeth, it can still relatively long time to retain in vivo. but because of the size and structural problems of the teeth, the bearmasticatory functionand tolerance ability and permanent teeth bite force than a certain gap, resulting

11、in the patient's life trouble report, calcium can not make the teeth grow fastermany parents believe that their kids teeth grow slowly because of calcium deficie ncyto blame but the study con firmed that calcium and its speed, there is nodirectrelationship. if the child body calcium deficien

12、cy, may have an impact onthe teeth,but more on the gen era i effects more obvious.the main factors affecting the teething sooner or later is genetic, physical development status, nutritional status, dietary habits, may also have some effect on the dentition. in fact, from den tai perspective, late t

13、eething problems are not earlier. if it is too late, for example, to one year is not long teeth, there may be some underlying diseases, such as genetic diseases, can cause tooth of the younger. this suggested that parents with children to do the whole department. deciduous teeth did not return shoul

14、d check the permanent tooth germwhen the child was born, no teeth in the mouth, about 6 months after birth,mandibular incisor began adorable, until 2 and a half years old teeth all the adorableout after the baby was born 1 years (1.5 11 mon ths) all en amel min eralizati on ,withi n 2 years after th

15、e birth of (6 24 mon ths) all adorable out of deciduous teethpermanent: is the shedding of deciduous teeth after second teeth, shedding nolonger adorable out a total of 32 permanent teeth in the mouth, 16 on each side.about six year old, the first permanent molar adorable, this time for the mixedden

16、tition period beginning. about to 12 years old baby teeth are replaced bypermanent teeth, mixed dentition period. in daily life, parents should understand the standard time children perma nentteethand permanent teeth in order, if found in deciduous teeth is not at the normal time ornot in the positi

17、on of adorable adorable normalz or recomme ndati ons totheprofessional children's dental examination. but because theindividualcircumstancesare very different, and therefore can not determine how long distanee standard timewithout changing is not normal. therefore, to thehospital can if pare

18、nts have doubts about such problems.wwweader- has not yet been teething children should do first teeth x light den tai check, checkwhether the teeth below the permanent tooth germ of the existenee and developme ntofperma nent tooth germ .if there is a certai n dista nee from the teeth of permanent tooth germ, probably due to the slow development of. if the permanent toothgermabove primary root absorbed, but not in normal time adorable, can consider removal of deciduous teeth ad