Device for determining mandibular central incisor lengths

FIELD: medical engineering.

SUBSTANCE: device has two probes and U-shaped plate and U-shaped plate. The U-shaped plate has lateral holes for fixing mould mass. The handle is arranged uniaxially with guide member having blind end, at the place the plate is curved. The probes have springs and restrictors. Probe positioned close to U-shaped plate curvature has length equal to 26 mm, the other probe is 34 mm long.

EFFECT: high accuracy of measurements; accelerated examination process.

2 dwg

 

The invention relates to medicine, namely to the dentist.

During direct restorations in the anterior maxilla in the manufacture of various removable and fixed prosthetic constructions in various pathological processes, such as erosion, significant carious lesions, abnormalities in size, shape and color of the tooth, chipped or atlam coronal part of a tooth due to injury, lack of incisors or fully edentulous, it is necessary to determine the true length of the incisors of the upper jaw. To this end, Hanenberger was a technique to determine the length of the Central incisor of the upper jaw (figure 1), which consists in dividing by 4 segment 1, lying on the prosthetic plane between perpendiculars 2 and 3, is omitted from it to the center of the tool 4 papilla and the line connecting the blind holes 5. On the plaster model in the field of cutting papilla and the blind holes have established rods, measurement of the distance between them was measured with calipers (Ivoclar. System prosthetics / Rbufel etc. - Quintessenz Verlags-GmbH, 1991, P.86-87). For measurement by this method requires two people, one holding the rods, and the other measures the distance between them using calipers. When the measurements are thus occur error - offset rods, AndAlso the absence or fuzzy negative display of the blind holes in the plaster models into force of the anatomical structure of the mouth. Preliminary impressions of teeth and manufacturer of gypsum models increases the time of the survey.

The task of the invention is to improve measurement accuracy and reduce the time of the survey. This is achieved through the use of the device (figa, b, C), consisting of a U-shaped plate 1 with the holes on the sides 2 for fixing the dental impression mass on the plate; the handle 3, in place of the bending plate and on the same axis as the guide having a hollow end 4, which is fixed with the possibility of movement in horizontal and vertical direction of the two probe 5, 6, supplied with springs 7, 8 and limiters for 9, 10, 11, 12. The probe 5 is located closer to the bend of the U-shaped plate that has a length of 26 mm, and the probe 6 - 34 mm

U-shaped plate corresponds to the anatomical structure of the alveolar ridge of the maxilla. The presence of holes on the sides of the plate is necessary for fixing the dental impression mass when installing the device in the oral cavity. Two probe mounted on the guide with the possibility of movement in horizontal and vertical direction, allow the individual measurements. The optimal sizes of the probes worked experimentally.

Before positioning the device in the oral cavity on the plate 1 in the region of the holes 2 put a small amount of silicone to blindly Noah mass for better fixation of the device on the dentition of the upper jaw. After positioning the device, the probe 5 is installed in the cutting area of the papilla, and the probe 6 in the area of the blind holes. The movement of the probe in the horizontal direction is produced by the guide 4. Springs 7 and 8 make it possible to individually adjust the height of the probes for each patient. The device is removed from the oral cavity and measure the distance between the probe 5 and 6. The resulting number is divided by 4, thereby obtaining the length of the Central incisors of the upper jaw.

Device to determine the length of the Central incisors of the upper jaw, containing two of the probe, characterized in that it consists of a U-shaped plate, with holes on the sides for fixing the dental impression mass and knob in place of the bending plate and on the same axis as the guide having a hollow end, on which is fixed with the possibility of movement in horizontal and vertical direction of the probe, supplied with springs and stoppers, and the length of the probe is located closer to the bend of the U-shaped plate, equal to 26 mm, and the length of the other is equal to 34 mm



 

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FIELD: medicine.

SUBSTANCE: device has supporting upright having supporting member bearing a member for fixing ear. The supporting member has T-shaped upper and lower parts arranged in parallel to each other and allowing rotation by 90°. The members for fixing ear, the members for fixing nose and occiput are mounted on the lower supporting member part movable up and down and back and forth. Millimetric rulers arranged as letter U are mounted on the upper supporting member part.

EFFECT: high fixation reliability.

2 dwg

FIELD: medicine.

SUBSTANCE: method involves recording graphic readings. Patient does sagittal and then transverse mandible movements simultaneously recorded with two parallel graphic lines. Maximum sagittal and then transverse mandible movements are recorded from central occlusion position distinguished in that the patient keeps sliding contact between maxillary and mandibular teeth, or maximum movements are recorded in temporomandibular articulation with dentition rows separated to minimum. Sagittal movement amplitudes being symmetric and transverse mandible movements line being immobile, norm is to be diagnosed. Amplitude asymmetry or transformed parallel dimension being the case, functional occlusion disorder or temporomandibular articulation pathology is to be diagnosed.

EFFECT: high accuracy of diagnosis.

2 dwg

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FIELD: medicine.

SUBSTANCE: method involves recording graphic readings. Patient does sagittal and then transverse mandible movements simultaneously recorded with two parallel graphic lines. Maximum sagittal and then transverse mandible movements are recorded from central occlusion position distinguished in that the patient keeps sliding contact between maxillary and mandibular teeth, or maximum movements are recorded in temporomandibular articulation with dentition rows separated to minimum. Sagittal movement amplitudes being symmetric and transverse mandible movements line being immobile, norm is to be diagnosed. Amplitude asymmetry or transformed parallel dimension being the case, functional occlusion disorder or temporomandibular articulation pathology is to be diagnosed.

EFFECT: high accuracy of diagnosis.

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FIELD: medicine.

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EFFECT: high fixation reliability.

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FIELD: medical engineering.

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EFFECT: high accuracy of measurements; accelerated examination process.

2 dwg

FIELD: method and device can be used for determining optical characteristics of multilayer objects (layers of enamel and dentine) containing internal matter which is partially transparent and dissipates light diffusely.

SUBSTANCE: radiation is applied to surface of tested object and subsequently registered at output of receiving light guide. Area of partial darkening is formed onto surface of object at the receiving light guide's exit window. Area of darkening provides distribution of dissipated radiation power density, which changes within space. Dissipated radiation enters input window of light guide and is registered. Optical characteristics of multilayer object are judged from the dissipated radiation. Device for realization of the method has illuminating unit provided with exit window, radiation registration unit, at least two photosensitive elements, signal control and processing unit, and receiving light guide. Illuminating unit's exit window and receiving light guide are mounted coaxial to each other. Photosensitive elements of radiation registration unit are optically matched with exit window of receiving light guide and are disposed coaxial to each other for registration of volumetric distribution of radiation power dissipated by tested object.

EFFECT: improved precision.

7 cl, 5 dwg

FIELD: stomatology.

SUBSTANCE: method can be used for objective estimation of color of solid tissues of teeth, filling material and fillings. Method of estimation includes application of light along lightguide onto part of tooth and guiding of reflected light along lightguide to introduce reflected light into spectrum analyzer. Reflection spectrum is subject to colorimetric treatment to determine coloration. The coloration is compared with pre-known coloration of samples. Color is judged to be identical in case both colorations coincide. Light is applied to non-damaged part of tooth and reflected light is collected by means of photometric sphere. Coordinates of coloration are determined from reflection spectrum. The coordinates are compared with known ones of samples of filling material. If difference in color doesn't exceed 2-3 thresholds then filling material is chosen. If color difference is bigger then two filling materials are chosen and imposed one on the other and the third material is added to reduce color difference till specified threshold. Control determination of coordinates of coloration of filling is carried out and in case the coordinates coincide with coordinates of coloration of non-damaged part of tooth doesn't exceed 2-3 thresholds, the estimation is judged to be identical one.

EFFECT: improved precision; higher truth of estimation of color.

2 cl, 4 dwg, 1 ex, 1 tbl

Dental explorer // 2268683

FIELD: medical engineering.

SUBSTANCE: dental explorer comprises rod, which is provided with the handle at one of its ends and operating tip at the other end and has additional tip. The additional tip is mounted on the rod parallel to the axis of the operating tip for permitting detachment so that to provide the distance between the tips to be no less than the thickness of the wall of periodontal pocket. The free ends of the tips are leveled.

EFFECT: enhanced precision and enhanced efficiency of treatment.

9 cl, 3 dwg

FIELD: medicine; dentistry.

SUBSTANCE: device for electric diagnostics of condition of hard tissues of tooth has measurement unit, active and passive electrodes. Active electrode has holder made of isolation material. There is tip at the end of electrode. The tip is made of current-conducting material. There is contact element on the tip; the contact element is made in form capillary tube. Elastic tube is fastened to holder. One end of the tube is open and the other one is closed. Closed end of the tube is connected with non-working end of capillary tube. Passive electrode is made in form of contact area. Tip has vertical hole and horizontal hole disposed in perpendicular to the tip; the horizontal hole is provided with thread. Removable capillary tube in mounted inside vertical hole; the capillary tube is capable of moving along the hole. Non-working end of capillary tube is connected with elastic tube by connecting coupling. Rest screw is mounted inside threaded hole. Closed end of elastic tube is made in form of elastic bottle placed inside rigid cylindrical case provided with lateral slot along its middle part. Elastic clamp is put onto case. Protecting case is disposed between bottle and case at its top part. Removable dozer in form of plate being congruent to case is mounted onto case. There is vertical protrusion at one end of dozer. The protrusion goes into slot of case for interaction with protecting case. The other end of plate of dozer is inserted into elastic casing. Silver contact area of passive electrode is disposed onto elastic substrate. Removable dozer has vertical protrusion which height can differ.

EFFECT: improved precision of measurement.

1 dwg

FIELD: medicine.

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EFFECT: high operation accuracy; improved dental prosthesis quality.

2 cl, 1 dwg

FIELD: medicine.

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EFFECT: high accuracy and objectiveness of measurements.

1 dwg

FIELD: medicine; medical engineering.

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