Three-dimensional computer-guided implant placement in oligodontia

Marieke A P Filius,Arjan Vissink,Krista I Janssen,Anita Visser,Gerry M Raghoebar,Joep Kraeima

doi:10.1186/s40729-017-0090-6

Marieke A P Filius, Arjan Vissink + Show 4 more

Open Access

https://doi.org/10.1186/s40729-017-0090-6

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Abstract

BackgroundThe aim of computer-designed surgical templates is to attain higher precision and accuracy of implant placement, particularly for compromised cases.PurposeThe purpose of this study is to show the benefit of a full three-dimensional virtual workflow to guide implant placement in oligodontia cases where treatment is challenging due compromised bone quantity and limited interdental spaces.Patient and methodsA full, digitalized workflow was performed for implant placement in two oligodontia patients. Accuracy was assessed by calculating the coordinates of the entry point (shoulder) and apex (tip) as well as the angular deviation of the planned and actual implants.ResultsImplant placement could be well performed with the developed computer-designed templates in oligodontia. Mean shoulder deviation was 1.41 mm (SD 0.55), mean apical deviation was 1.20 mm (SD 0.54) and mean angular deviation was 5.27° (SD 2.51).ConclusionApplication of computer-designed surgical templates, as described in this technical advanced article, aid in predictable implant placement in oligodontia where bone quantity is scarce and interdental spaces are limited.

Highlights

Oligodontia is the congenital absence of six or more permanent teeth, excluding third molars [1]
Computer-designed surgical templates based on computer tomographic ((CB)CT) images have enabled higher precision and accuracy in implant planning [3]. This technique is promising, it has, as yet, not been tested in oligodontia. In this technical advanced article, we show the benefit of a full threedimensional (3D) virtual workflow to guide implant placement in oligodontia, including an analysis of the accuracy of the actual implant placement in both cases
Eruption of the 34 was already seen after 3 months of Assessment of accuracy of implant placement To assess the accuracy of the implant placement, postoperative CBCTs were made of both patients. 3D models of the postoperative result were obtained and superimposed on the data of the implant planning using a surface based alignment method and the same threshold value as used for the pre-operative scans

Summary

Introduction

Oligodontia is the congenital absence of six or more permanent teeth, excluding third molars [1]. The available interdental space and Computer-designed surgical templates based on (cone beam) computer tomographic ((CB)CT) images have enabled higher precision and accuracy in implant planning [3]. This technique is promising, it has, as yet, not been tested in oligodontia. The aim of computer-designed surgical templates is to attain higher precision and accuracy of implant placement, for compromised cases. Purpose: The purpose of this study is to show the benefit of a full three-dimensional virtual workflow to guide implant placement in oligodontia cases where treatment is challenging due compromised bone quantity and limited interdental spaces. Accuracy was assessed by calculating the coordinates of the entry point (shoulder) and apex (tip) as well as the angular deviation of the planned and actual implants

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Conclusion