INTRODUCTION Diagnosis Correct determination, discrimination, estimation & logical appraisal of conditions found during examination as evidenced by distinctive signs, marks & symptoms
INTRODUCTION Comprehensive database: Case history Clinical examination Study casts Radiographs Photographs Diagnostic aids: Essential & Supplemental
DIAGNOSTIC SETUP H.D. Kesling (1956) Supplemental diagnostic aid Practical aid in treatment planning Derive maximum clinical information A set of trimmed & polished casts
DIAGNOSTIC SETUP Individual teeth & associated alveolar processes- sectioned off & replaced in desired positions Simulate the various planned tooth movements Not necessary to coordinate with cephalometric tracing Allowance for inevitable anchorage loss
REQUIREMENTS Well trimmed casts Fret saw with blades Modelling wax Wax knife Alcohol torch/ Spirit lamp
PROCEDURE Maxillary & mandibular study casts prepared Bases trimmed parallel to the occlusal plane Horizontal cuts made in the mandibular cast 3mm below the gingival margin using Fretsaw blade
PROCEDURE Vertical cuts are made to separate individual teeth All teeth except second & third molars are removed Mesial & distal ends of roots of teeth are trimmed – seating in new position
PROCEDURE Wax blocks placed in the slits formed while cutting the teeth away Mandibular incisors arranged on the study cast at an angle of 65 degrees to the Frankfort Horizontal plane Canines & premolars are placed in the correct contact relationships
PROCEDURE If the remaining space is inadequate to receive the first molars extraction indicated Eliminate 1 st premolars from the setup & place 2 nd premolars in contact with canine or perform incisor or proximal stripping Maxillary teeth cut & repositioned in the wax setup articulating them with the mandibular setup
USES TSALD – directly visualised Estimates if uprighting of the 2 nd molars could solve the arch length discrepancy Visualizes complex orthodontic treatment Possibility of aligning incisors
USES Borderline cases: Extraction / non extraction 1 st premolar or 2 nd premolar Possible types of occlusal arrangement in abnormal occlusal problems Patient can be motivated- simulating various corrective procedures
CONCLUSION Diagnostic setup – very valuable diagnostic aid Routine use - better treatment plan & patient motivation
BIBLIOGRAPHY Textbook of Orthodontics- Gurkeerat Singh, 2 nd edition Orthodontics- The Art and Science- S.I. Bhalajhi , 4 th edition Textboook of Orthodontics- M.S. Rani , 3 rd edition Prep Manual for Undergraduates- Sridhar Premkumar