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- W2368708506 abstract "Objective To survey the fluctuating curve of intra-articular pressure(IAP)in temporomandibular joints(TMJ)of miniature pigs following one side posterior teeth extraction and denture restoration.Methods 11 adult female normal miniature pigs were randomly divided into 3 groups:group Ⅰ-control group(2 pigs),group Ⅱ-tooth-extraction without denture restoration(4 pigs),group Ⅲ-tooth-extraction with denture restoration(5 pigs).In group Ⅱ and Ⅲ,pigs' left side upper and lower posterior teeth were pulled out.Co-Cr casting dentures were fabricated for the pigs in group Ⅲ 3 months after teeth missing;the dentures were fixed by implanting titanium nails through the base plate into the alveolar bone.TMJ IAPs of both sides were determined monthly at 3 jaw positions respectively;meanwhile,the weight of pigs were measured to monitor their growth.The experiment period was 6 months.Results Compared with controls,the imbalance of bilateral pressure in group II was showed:the IAP at rest could not maintain subatmospheric identically on both sides;during operator-assisted opening movement,the negative IAP was significantly lower;however,when the jaw was closed,the IAP increased to a higher positive level;and the pressure could not return to baseline or slowly decayed to original values;the severe attrition of teeth in working side was found out.The pressure values of group III indicated that the treatment with denture timely could evidently improve the asymmetric conditions:IAP resumed to be subatmospheric;as the jaw was opened,a negative pressure was presented followed by an increased positive pressure while the mouth was closed;the IAP could immediately decayed to baseline after jaw movement;the bilateral IAP was close to equality and balance ;the attrition of teeth was alleviated.During the 6 months,the pigs maintained their weight within the normal range and grew healthily.Conclusion Missing one side teeth could disturb the balance of occlusion、TMJ and masticatory muscles;on the other hand,denture restoration could regulate the unbalanced relation and make them harmonious." @default.
- W2368708506 created "2016-06-24" @default.
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- W2368708506 date "2008-01-01" @default.
- W2368708506 modified "2023-09-24" @default.
- W2368708506 title "Measurement and analysis of intra-articular pressure in temporomandibular joints of miniature pigs following one side posterior teeth extraction and denture restoration" @default.
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