The edge of the general front teeth restorations advocate in subgingival 0.5 - 1.0mm, the posterior teeth can be flush with the gum, put the number of subgingival should look at the depth of the gingival sulcus, it is best to take a periodontal probe to test, (someone who brings body done experiments, concluded that the biological width is 2.47mm) is not damage junctional epithelium, injury combined with the consequences of the epithelium is destroyed the biological width, will lead to gum recession or periodontal pocket formation, I now posterior teeth as much as possible to flush the gums, the front teeth up into the subgingival 0.5mm, feeling so good, will not result in the stimulation of gums, the binder will not be left over.
Then what should be placed for the repair if the gingival edge must be placed in the subgingival deep? The domestic Professor anatomical explanation for dental and periodontal tissues concluded that the average level of the Chinese people, the general requirements placed about 0.6mm subgingival can. To achieve this depth in the prepared tooth before gingival sulcus pressed into a "00" retraction cord, and then to determine the location to repair the edge of the What is adult orthodontics to pay attention abutment to the position of the gingival margin of the online. Subgingival edge not to be too close to the gingival ditch should be retained at least 0.4mm distance from the gingival sulcus is generally shallow, about 0.5 - 1.0mm, tooth preparation, it is easy to hurt the sulcus epithelium and junctional epithelium.
Gingival retraction methods, the most common mechanical retraction cord of gingival retraction cord on the market today have a lot of brand choice when other people get confused to choose a good retraction cord the clinical work is very important;
Generally less formal operation, for example, in adrenaline-soaked cotton twist for retraction cord, although scheduled to open the gum tissue, but the damage to the gums is also irreversible. It is not recommended; renin for some patients with How to care for porcelain teeth heart dysfunction may cause them palpitation, shortness of breath. Therefore, to promote the weave of the model (not the kind of rub up will be dissipated gingival line we use the kind of formal, certain gingival retraction cord woven), this will ensure good gingival.