In the present experiment,we investigate the effects of orthodontic tooth rotation onneighboring teeth and periodontal tissues.The second maxillary incisors of 16 randomly selecteddogs were subjected to rotation at a ...In the present experiment,we investigate the effects of orthodontic tooth rotation onneighboring teeth and periodontal tissues.The second maxillary incisors of 16 randomly selecteddogs were subjected to rotation at a magnitude of 100 grams and a moment of 550 g·mm in a du-ration of 3 to 56 days.Then sections were prepared for histological examination.The findings re-vealed that,due to tooth rotation,neighboring teeth were drifted and rotated(82%),and therewere disarrangement and hyalinization of the periodontal ligament(88%),remodeling of the pe-riodontium(86%)and root resorption(32%)were also observed.These results demonstratethat tooth rotation may exert marked effects on neighboring teeth and periodontal tissues,whichmay be of important clinical significance.展开更多
Objective. To discover the relation between alkaline phosphatase (ALP) in gingival crevicular fluid (GCF) of implant teeth and the curing results. Methods. We measured the ALP level in GCF among 56 cases of implant te...Objective. To discover the relation between alkaline phosphatase (ALP) in gingival crevicular fluid (GCF) of implant teeth and the curing results. Methods. We measured the ALP level in GCF among 56 cases of implant teeth which included 2 failed cases, 5 cases with bad oral hygiene and gingivitis, and compared it with that in the normal group composed of 10 persons. Results. The ALP levels in normal group and success implant group showed no difference. The ALP levels in normal group and success with gingivitis group showed obvious difference. The ALP levels of the 2 failed cases are the highest of all.Conclusions. The ALP level in GCF is an important index in evaluating the curing result of the implant teeth.展开更多
In a school,the class has just begun.The teacher asked a student:“Mart-in,can you tell us how people know the age of hens?”“According to the teeth,sir.”“But hens don’t have any teeth.”“Perhaps hens don’s have...In a school,the class has just begun.The teacher asked a student:“Mart-in,can you tell us how people know the age of hens?”“According to the teeth,sir.”“But hens don’t have any teeth.”“Perhaps hens don’s have any.But I have.If its flesh is tender,the henis young;if the flesh is hard,the hen is old.”(上海高永伟选辑)展开更多
文摘In the present experiment,we investigate the effects of orthodontic tooth rotation onneighboring teeth and periodontal tissues.The second maxillary incisors of 16 randomly selecteddogs were subjected to rotation at a magnitude of 100 grams and a moment of 550 g·mm in a du-ration of 3 to 56 days.Then sections were prepared for histological examination.The findings re-vealed that,due to tooth rotation,neighboring teeth were drifted and rotated(82%),and therewere disarrangement and hyalinization of the periodontal ligament(88%),remodeling of the pe-riodontium(86%)and root resorption(32%)were also observed.These results demonstratethat tooth rotation may exert marked effects on neighboring teeth and periodontal tissues,whichmay be of important clinical significance.
文摘Objective. To discover the relation between alkaline phosphatase (ALP) in gingival crevicular fluid (GCF) of implant teeth and the curing results. Methods. We measured the ALP level in GCF among 56 cases of implant teeth which included 2 failed cases, 5 cases with bad oral hygiene and gingivitis, and compared it with that in the normal group composed of 10 persons. Results. The ALP levels in normal group and success implant group showed no difference. The ALP levels in normal group and success with gingivitis group showed obvious difference. The ALP levels of the 2 failed cases are the highest of all.Conclusions. The ALP level in GCF is an important index in evaluating the curing result of the implant teeth.
文摘In a school,the class has just begun.The teacher asked a student:“Mart-in,can you tell us how people know the age of hens?”“According to the teeth,sir.”“But hens don’t have any teeth.”“Perhaps hens don’s have any.But I have.If its flesh is tender,the henis young;if the flesh is hard,the hen is old.”(上海高永伟选辑)
