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Ann Maxillofac Surg. 2018 Jul-Dec;8(2):230-233. doi: 10.4103/ams.ams_163_18.

Drill Bit Guiding System for Implant Placement.

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Department of Oral and Maxillofacial Surgery, Sri Ramakrishna Dental College and Hospital, Coimbatore, Tamil Nadu, India.



The implant angulation plays a very important role in the outcome of prosthetic and functional outcome. The conventional surgical stents uses a ring system to drill the pilot drill, only the CAD printed stents provides a guide sleeves for the sequential drill for implant placement.

The Purpose of this Study:

The purpose of the study was to fabricate a drill bit guide for the stent to transfer the angulation and implant placement planned using conventional method in prescribed drilling sequence.

Material and Methods:

A surgical stent with a threaded guide ring system was fabricated with internal drill bit guiding system. The interchangeable sequential drilling allows the drill bit to be in predetermined position throughout the procedure.


The surgical stent with the drill bit guiding system provided less than 1% error with a mean deviation of 0.48%.


The drill bit guide fabricated has a complete limiting system and transfers the angulation and placement as desired with very minimal or no alteration, which enables the predetermined prosthetic outcome.


Drill bit; implant; stent

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