What Are the Common Reasons for Rework in Denture Processing?

Denture rework is the last thing doctors and denture processing companies want to see, it is related to the doctor's reputation, but also related to the credibility of the enterprise and costing. How to control denture rework and improve the reputation of dental restorations is a problem that every dentist and denture processor cannot ignore and must solve. If the denture enterprise can properly solve the rework problem, it can win the initiative of the market, and create good conditions for the rapid development of the enterprise. Common reasons for rework of denture are as follows: 

1. The occlusal surface elevated or lowered

Analysis: Doctors do not wear temporary crowns for patients after preparing teeth, resulting in the natural elevation of the patient's abutment teeth; technicians adjust and grind the occlusion to wear the opposite jaw teeth; inaccurate occlusion, such as free loss, wax to take the jaw, waxing is easy to deform; affect the occlusion of the gypsum tubercle technicians did not remove.

2. Ceramic bridge can not be in place

Analysis: The doctor took the mold too early to take off the mold, resulting in deformation of the model; remodeling with two kinds of gypsum mold filling, because of its expansion coefficient is not the same, when filling the mold, the back of the impression is not suspended to form a fulcrum, resulting in deformation of the model; the doctor prepared the abutment teeth is relatively rough, the abutment surface is not polished there are small fulcrums; preparation of the teeth after the patient patients did not wear a temporary crown, resulting in the abutment teeth physiological displacement; the generation of the type of cutting deformation; generation of the type of inaccurate repositioning; Incorrect treatment of inverted concavity; denture polishing is not in place, long edge, adjacent points are too tight; the edge of the doctor's mold is not clear, the edge of the technician's error in judgment, resulting in a long edge of the denture can not be in place.

3. Incorrect color

Analysis: the doctor than color error, resulting in denture color and neighboring teeth have color difference; base teeth preparation amount is insufficient, through the bottom layer of color; technician operation error, read the wrong list, take the wrong porcelain powder; porcelain powder color and the doctor than color plate has differences and so on. 

4.The teeth do not look good

Analysis: patients have special needs; technicians and doctors do not agree with the aesthetics; technicians are too poor, denture and the patient's neighboring teeth are not coordinated.

5.Neck edge does not fit

Analysis: The edge of the doctor's mold is not clear, the edge of the substitute type technician's error in judgment; the technician's grinding is inaccurate, the edge of the grinding is short;

6.Neck margin reveals black line

Analysis: the technician operation is not standardized, shade layer coating, the bottom of the crown edge of the shade powder did not form a droplet; polishing the handpiece speed is too fast, resulting in denture edge porcelain powder chipping.

7.Chipped porcelain

Analysis: in the fixed denture repair process, if the dentist in the patient's dental preparation for grinding the amount of teeth is not enough, may lead to the porcelain layer is too thin, porcelain strength is not enough, thus triggering the chipping; denture design is unreasonable, the porcelain layer is too thick, the gold-porcelain demarcation line is in the occlusal point; the doctor is not designed reasonably, the bridge is too long, the patient is too much internal stress when chewing.

8.Other reasons