| Along with the advance of the ages and improvement of the living standards of the people, people are not only concerned about mouth cavity repair the request of very much the instauration on the function, but also the beautiful request in the right alone exaltation. Porcelain fused to metal crown (PFM Crown) has applied extensively in clinic. PFM Crown have the intensity of metal crown and the beauty of porcelain crown, bear to whet well, match colors easily, wear well, nature and reality. But because its metals layer is not deeply light, not accurate than color, cervix colors, poor adaptation to differ the etc. problem. Along with the Porcelain fused to metal crown repair of increase, the complications appeared behind to also increase gradually. My section gather the beautiful blemish in cervix of the Porcelain fused to metal crowns problem to the 2003 from 2001~ since then 55 patients , totally 83 roast the porcelain crowns proceeded meticulous mouth cavity in system check and reviews check, looking for the reason and taking the corresponding improvement measure. At the same times prepare Porcelain fused to metal crown of 76 roast use the same upswing method to study the influence of disfigurement of cervix colors and upswing methods. Observe the result after repairing; carry on clinic and statistics analysis. The aim repairs the quantity in the exaltation, creating to the clinical design the metals of the high quantity roasts the porcelain hat provides the help with guide.83 teeth of the Porcelain fused to metal crowns was check-up that the beautiful blemish in cervix colors the Porcelain fused to metal crowns cervix blemish rate to is color 73.5% respectively, anatomy appearance 62.7%, margin adaptation 80.7%, cervix margin ash line 71.1%, gingival condition 81.9%.The reason is that not correct on tooth preparation, impression procedures were not described gingival retraction cords and manufacture in a rough way during crown treatments. It result in gingival damage and affect the cervix colors of Porcelain fused to metal crowns. This text has in the shoulder set position, width, shape...etc. Aspect system strict according to clinical operation standard, and apply to line up the technique of gingival retraction two times, make use of the new impression materials to make impression and cervical ceramic approach increases consumedly the beautiful of Porcelain fused to metal crowns cervix design. After the improvement repairs 83 teeth Porcelain fused to metal crowns cervix blemish decrease difference as color match 54.2%, anatomy appearance 51.9%, marginal integrity 67.4%, cervix margin ash line 71.1%, health of gum 71.1%.The same term 76 teeth Porcelain fused to metal crowns cervix blemish is that color match 10.5%, anatomy appearance 6.6%, marginal integrity 7.9%, cervix margin ash line 0%, health of gum 10.5%. It proves that our improvements in clinical work is valid and give us a direct guidance on clinic works.The influence of cervix beauty that Porcelain fused to metal crowns has a lot of factors. Its appearance, position, width, surface handles is concerned with PFM crowns beauty in margin porcelain closely related. Along with the improvement of PFM crown preparation technology, the influence of metal ceramic restoration margin on gingival designs are more and more paid attention to by the clinical doctor. Request to be in the shoulder set position, width, shape...etc. Aspect system to have strict according to clinical operation standard, and apply to line up the technique of gingival retraction , make the clear and perfect impression and cervical ceramic approach technique etc. exaltation metal-ceramic restoration the beautiful that porcelain whole crown cervix design.After improving to repair the metal ceramic restoration repairs still exists beautiful blemish in cervix, the analysis thinks that in addition to the clinical system has the reason of the method, still have the cognition on the idea shortage, think the contented only a need for and function line. People p... |
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