molar>mand ibular primary anterior teeth E.Maxillary primary incisor>mandibular primary anterior teeth mandibular primary molar>Maxillary primary molar 58 A 7 year's old boy with bilateral loss of the mandibular primary first and second molars,which of the following may be best A.Band and loop respectively B.Lingual arch C.Removable appliances D.Distal shoe E.None ofthem 59 Clinical features of dental fluorosis do not include A.The lesion symmetrically distributed in the mouth,but not all teeth are equally affected B.The least affected teeth are the incisors and first permanent molars C.Changes from fine white opaque lines running across the tooth on all parts of the enamel to features where parts of the chalky white and porous outer enamel become detached and discolored D.The loss of surface enamel in the severest cases results in a loss of anatomical form of the teeth E.Well-demarcated borders lesion along incremental line 60 For intrusive luxation of teeth,the most common complication is A.Pulp necrosis B.Osteitis C. Root resorption D.Alveolar process resorption E.All of above 二、名词解释 a)acquired pellicle b)resistance form c)indirect pulp capping d)retrograde pilpitis e)自发痛和激发痛 f)Dentine hypersensitivity g)Smear layer h)Pulpotomy i)Initial apical file j)Dental plaquemolar> mandibular primary anterior teeth E. Maxillary primary incisor> mandibular primary anterior teeth > mandibular primary molar> Maxillary primary molar 58 A 7 year’s old boy with bilateral loss of the mandibular primary first and second molars, which of the following may be best A. Band and loop respectively B. Lingual arch C. Removable appliances D. Distal shoe E. None of them 59 Clinical features of dental fluorosis do not include A. The lesion symmetrically distributed in the mouth, but not all teeth are equally affected B. The least affected teeth are the incisors and first permanent molars C. Changes from fine white opaque lines running across the tooth on all parts of the enamel to features where parts of the chalky white and porous outer enamel become detached and discolored D. The loss of surface enamel in the severest cases results in a loss of anatomical form of the teeth E. Well-demarcated borders lesion along incremental line 60 For intrusive luxation of teeth, the most common complication is A. Pulp necrosis B. Osteitis C. Root resorption D. Alveolar process resorption E. All of above 二、名词解释 a) acquired pellicle b) resistance form c) indirect pulp capping d) retrograde pilpitis e) 自发痛和激发痛 f) Dentine hypersensitivity g) Smear layer h) Pulpotomy i) Initial apical file j) Dental plaque