The 2022 National Dental Practitioner (Assistant) Physician Practical Skills Exam is underway. The editor of Jingshi Xinglin Medical Education will collect and sort out the Oral Practitioner (Assistant) Physician Skills Exam:molar cast metal full crownPractice exam questions, I hope it will help you to review
Molar cast metal full crown preparation:
male,65 years old. 46 Crown Restoration.
one,Doctor-patient communication and posture
1.The doctor communicates with the patient before the operation,Necessary work and processes in operation,And maintain communication with the patient during the operation.
2. When preparing maxillary teeth,maxillary dentition plane and ground45°,The physician is in the right front or right rear of the patient.
3 When preparing mandibular teeth,The mandibular dentition plane is parallel to the ground,The physician should be behind the patient’s head,Adjustable patient chair position,Keep its head slightly above the physician’s elbow.
Second, the selection of equipment routine inspection package, high-speed mobile phone, emery bur.
3. The use of equipment, the use of high-speed mobile phone holding, the use of improved pen-holding style,Pay attention to the location of the fulcrum,Use ring finger as fulcrum,The closer to the tooth the better.
Fourth, the operation method and requirements
1jawSurface preparation: use a cylindrical emery bur (TR-12 or TF-12 bur),Grind out the developmental groove and buccal and tongue tip slightly smaller than1.0mm deep groove as guide groove,Then use a peach-shaped grindstone (F0-25 or F0-27 bur) according tojawface anatomy,even grinding1.0mm,Provide adequate thickness for metal crowns.
2. Buccolingual preparation: use a tapered or cylindrical emery bur (TR-12 or TF-12 bur).Removal of buccal and lingual bulge,Eliminate undercuts,Reduce the maximum circumference of the crown to the gingival margin.
3.adjacentFace preparation: Use a thin, tapered emery bur (TR-11 or TF-11 bur) along the affected toothadjacentCheek and Tongue Grinding,Prepare enough clearance and eliminate undercuts,The mesial and distal planes should be parallel to the long axis of the tooth or converge toward the inspection side2°-5°.
4. Shaft angle preparation: Use emery burs (TR-12 or TF-12 burs) to round the sharp shaft angles and point angles,And form abduction space and buccal-lingual abduction space consistent with tooth anatomy.
5. Neck preparation: generally use a blade-shaped shoulder or a 135° shoulder,Use a tapered or cylindrical emery bur (TR-12 or TF-12 bur) grinding and cutting.
6 Checkjawface clearance method commonly used
(1) Put the thin layer of bite paper on the preparationjawnoodle,bite the patient,an examinationjawThere is no obvious imprint on the surface.
(2) Place a baked soft wax sheet on the affected toothjawface bite,Remove after cooling,Use a wax-up caliper to measure the thickness of the wax at the thinnest point,until appropriate.
(3) It is required that the axial surface of the prepared body has no undercuts,polishedjawFace edge and axis angle,Complete tooth preparation.
The above is the Dental Practitioner (Assistant) Physician Skills Test:molar cast metal full crownSkill practice test questions, more test information, simulation exercises, and test papers are welcome to visit Jingshi Xinglin Medical Examination Network!