HOW TO SELECT AN IMPLANT OF SUFFICIENT LENGTH NEAR iAN CANAL
Selecting maximum lenghth for an implant close to the ian canal is always a challenge, A cbct is definitely invaluable and so are pans but not all clinics with facility for implants have access to pans in an operatory We order cbct images in difficult cases Panorams are requested as a pre - post operative assessment tools but we depend hugely on digital IOPAs intraoperatively and for selection of the implant lenghts
The following procedure describes a simple method to determine the length of available bone from the crest to the superior border of the inferior alveolar nerve canal.
.Using a preoperative IOPa, select an endodontic post ,as a tentative length
We use mani stainless steel posts which are available in 4mm-19mm lengths
The selected post is measured in an endobloc
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| mani ss post |
Mani provides endodontic posts
in an assorted box
Cover the sensor with a cello foil,
Use cyano acrylate quick set adhesive, dip the selected post in the adhesive and with a pair of tweezers place it parallel to the to the sensor , the post adheres immediately and will not fall off accidentally during imaging ,an additional security measure would be to insert this assembly into a protection sleeve.
Imaging is now carried out as routinely, A calibration tool in the imaging software can now be applied to calulate the elongation or shortening. The errors can be virtually eliminated if we use a rinn holder, however it is advisable to manually measure
Repeat the xrays with still bigger post till the selected post is 2.5 mm superior to the superiormost radioopaque border of canal
A color temperature tool will demarcate the anatomy precisely
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| color tool |
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| a rinn type of sensor hoder |
