Occlusal (prosthetic) plane

In forming the occlusal plane guided by a symmetrical arrangement of anatomical structures of the face. From a clinical point of view, it is advisable to divide the occlusal plane into three segments - one front and two side. The front segment of the occlusal plane of the natural bite is usually symmetrical and parallel to the pupillary line, that is, the line connecting the two after the loss of natural teeth front segment of the occlusal plane is mounted on roller occlusive respectively pupillary line. Clarifying the parallel lateral segments of the occlusal plane and lateral parts of a person engaged by many authors. Most significant for prosthetic dentistry, investigate Dutch anatomist Peter Camper, who found that the line connecting acanthion the base of the ear canal, parallel to the lateral segment of the occlusal plane. This line is called Prosthodontics Kampers line, horizontal or nasal-ear line. It is projected on the face of the wing base of the nose to the middle ear tragus. Thus, after the loss of natural teeth, nasal-ear line are signs pointing to the reduced lateral segments of the occlusal plane. If the lateral segments bite block formed parallel to the nasal-ear line (two-way), and for setting the teeth of a dental leadership, artificial teeth in the lateral parts are mounted symmetrically on the left and the right, that is as natural teeth were located. The definition starts with the occlusal plane of the front segment. Initially determined by the height of the upper bite block in front of the segment. In this case, it should be guided by: cutting edge of the central incisors when the mouth is closed coincide with the line of closing of the lips, and the conversation protruding from under the edge of the upper lip 1-2 mm. Typing pattern in the mouth, the patient asked to close his mouth. In this position, the roller clamp is applied to the line of the lips and it determines its height. If the edge of the roller below the closing, it should be shortened, if the above - to build a strip of wax. After that, check the height of the shaft a half-open mouth. In this case, the edge of his 1-2 mm should extend from the upper lip. Once is the height of the front segment, should bring it in line with the pupillary line. To do this, take the line, one of them mounted on the occlusal surface of the front segment, the other - on the pupillary line. Parallelism of lines indicates proper formation of the occlusal plane of the anterior bite block. Then forms the occlusal plane in the lateral segments. Occlusal plane of the roller in the lateral segments should be parallel kampers horizontally. To verify the correctness of its parts, as in the first case, use two lines. One placed on the occlusal surface of the roller, the other - on the nasal-ear line. Parallelism of lines indicates the correct direction prosthetic plane. If parallelism is not present, then it should be created by adding or removing wax it, depending on the circumstances. When working with wax patterns and roller application of deformation from heat in the mouth, from the warm spatula, etc. In order to prevent its templates with bite block should be periodically lowered into the cold water. After preparation, the occlusal plane of the upper roller start to fit the lower to the upper platen. At the same time achieve tight clamping rollers in anteroposterior and transversal directions, and location of their buccal surfaces in the same plane. Corrections that may be needed to produce only the lower platen. A well checking bite block occlusal surfaces are flush with each other all over. When closing the mouth at the same time they come into contact, both in front and in the lateral parts. Correctly closing rollers checked visually. Initially controlled fit them together in the anteroposterior direction. In the case of non-simultaneous closing at survey sees a shift in the rollers. Thus, if the closing occurs before the rollers in the back of, in the front section they fall later. Deficiencies noted are corrected by removing wax build-up or in the relevant sections of the lower bite block. Disturbances in the fitting in the occlusal surfaces of the rollers and the transverse direction, but it is harder to detect. In this case, the rollers in the first closing of the mouth, for example, come in contact with the right, and a little later - to the left. Sometimes it is a violation of visually elusive, since the serried ridges gap between them is found. The reason is that the patterns on the one hand and hang down between them and the mucous membranes of the alveolar process a gap that the doctor does not see. To detect sagging roller insert between cold spatula. If they are closed tightly and at the same time are on the alveolar process, insert a spatula without the efforts will not succeed. If the roller with one hand hang down between occlusal surfaces with the introduction of a spatula easily detected gap. All known defects eliminated, and all corrections are made only on the lower platen, and not on the top. The latter is not correct, because his prosthetic plane and orientation lines in the future will serve as guidelines for making teeth. Permissible only fix the vestibular surface of the top roller to restore a person in accordance with the aesthetic optimum or desired patient.

Date: 2015-01-02; view: 1434