Intra oral radiographs
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Transcript of Intra oral radiographs
INTRA ORAL RADIOGRAPHIC TECHNIQUES
MELBIA SHINY FIRST yr MDS
contents
Periapical Bite wing Occlusal specialised
Basic principles
Types
Periapical Bite wing occlusal
Full mouth set
Periapical radiography
Radiographic technique of oral structure taken by placing film in oral cavity while X ray source is outside oral cavity.
Paralleling technique Bisecting angle technique
Indication
Apical lesion ,cyst & apical surgery Dental caries Mixed dentition analysis Pulp pathology Periodontal status Trauma Unerupted tooth Endodontic treatment & implant
prosthesis
Limitation
Trismus Gagging Large cyst & tumours Two dimensional image
Image receptor
Film Charge coupled device (CCD) Complementary metal oxide
semiconductors(CMOS) Sensors Storage phosphorous plates
Paralleling/fitzgerald technique
Principle
Receptor holding instrument Rinn XCP film holder Rinn XCP-
DS solid state
digital sensor
holder
Digital phosphor plate holder
Masel precision all in one metal holder
Hawe Neos holder
Patient positioning
Angulation of tube head
Receptor placement
Maxillary central incisors
Maxillary lateral incisors
Maxillary canine
Maxillary premolars
Maxillary molars
Distal oblique
Mandibular incisors
Mandibular canines
Mandibular premolars
Mandibular molars
Distal oblique
Bisecting angle technique/ short cone Cieszynski’s rule of isometry
Indications
Large rigid sensors Anatomy of patient
Receptor holding instruments
Receptor placement
Flim & its placement
Position of patient
Angulation of tube head
Vertical : max
mad Incisors +40
-15 Canines +45
-20 Premolars +30
-10 Molars +20
-5
Horizontal angulation
Tube head position
Le master technique/modified bisecting angle technique
Maxillary
central incisors lateral incisor
Maxillary canine
Maxillary
Premolar
Molar
Third molar
mandibular
incisors canine
Mandibular
Premolars molars
Third molar
comparison
Bisecting Paralleling technique1)Distortion of image <2)Superimposition of nozygomatic bone3)Cone cut not4)Alveolar bone fills Interproximal space true relation5)Easier & < space6)Long teeth seen by Vertical angulation
Bite wing/interproximal technique
Interproximal caries Secondary caries Periodontal condition Calculus Deciduous & permanent
Principle
Films
Angulation
Horizontal bite wing receptor
Hawe neos kwikbite horizontal holder
Horizontal bite wing
Rinn XCP DS solid planmeca solid state
statedigital sensor digital sensor
holder
Vertical bite wing receptor
Premolar molar
Anterior bite wing
Occlusal radiography/sandwich radiography
Intra oral technique in which large occlusal areas of maxilla & mandible is recorded.
Indication
Trismus Precise location of roots,
supernumerary, unerupted, & impacted teeth.
Calculi in salivary gland duct Maxillary sinus Trauma Size & extend of cyst & tumours Position of unerupted canine
Maxillary anterior occlusal
Anterior Mandibular occlusal
Maxillary cross section
Mandibular crossection
Lateral Maxillary occlusal
Lateral Mandibular occlusal
Specialized intra oral techniques
1)Mandibular third molarSurgical needle holder technique/
& using film holder
A - emmenix /snap -A-rayB – worth film holderC – artery forceps
Two radiograph technique
Modified X ray cone technique
Gagging /retching
Area sensitive to gagging
management
Attitude Time limit < Exposure sequence – anterior Divert attention Application of LA spray, undiluted
mouth wash,placebo medicines,ice cold water,table salts
Use Bite block & film holding device
Place film packet flat on occlusal plane
Endodontics
Taping film packet
Special endodontic film holder Endo ray film holder
Two different radiographs for separation of root canal
Thin apex Small X ray beam & low KV Rubber dam & saliva ejector
Root length assesment
Edentulous ridge
Paralleling technique with cotton rolls
Paediatric patient
Film size – 0 < 10 yrs – 50% reduce mA ,10 to 15
yrs – 25% reduce mA Show & tell approach Iead apron & thyroid collar.
Modified bisected angle technique
Reverse bite wing radiography
Object localization
Foreign objects Salivary gland stones Canal position Impacted teeth Root piece Broken needle
Buccal object rule/Clark rule/tube shift cone/SLOB
Principle of parallex
Right angle technique
stereoscopy
Radiopaque wire technique
Edentulous patient
Shallow palate
Bony growth
Lingual frenum
Premolar area
Supine position radiography