Evaluation of Photogrammetry Technique in Full-Arch Implant-Supported Fixed Prostheses

Year 2022, Volume: 4 Issue: 2, 90 - 102, 30.06.2022

Seher Badur , Serkan Sarıdağ

Abstract

Dental implants are one of the most widely used therapies for the rehabilitation of partially or completely edentulous patients. Passive fit of the implant-supported prosthesis significantly improves the long-term prognosis of these treatments. Fabricating an accurate and precise implant-supported, complete-arch prosthesis is challenging because the process involves many clinical and laboratory steps. The classic system for the manufacture of an full arch implant-fixed prosthesis supported by multiple implants consists of taking impressions with impression materials and then achieving the casting. However, in this conventional impression technique, many factors result in the inability to transfer the impression copings in accurate position or their exposure to micro-motions within the impression. Although the digital impressions taken with intraoral scanners in digital dentistry have started to find a comprehensive place in clinical practice, their reliability for full-arch implant supported dentures continues to be discussed. Photogrammetry is another new option that allows the positions of intraoral implants to be recorded in 3-dimensional via photographic images. By transferring digital impressions taken with optical markers to the CAD/CAM workflow, the error chain is shortened, and it is aimed to produce prostheses with high precision and passive fit.

Keywords

Photogrammetry, digital implantology, passive fit, CAD/CAM

Tam-Ark İmplant-Destekli Sabit Protezlerde Fotogrametri Tekniğinin Değerlendirilmesi

Abstract

Dental implantlar, kısmen veya tamamen dişsiz hastaların rehabilitasyonu için en yaygın kullanılan tedavilerden biridir. İmplant destekli protezin pasif şekilde oturması ise bu tedavilerin uzun vadeli prognozunu önemli ölçüde iyileştirmektedir. Doğru ve hassas, tam ark implant destekli protez üretmek zordur çünkü süreç birçok klinik ve laboratuvar adım içerir. Çoklu implant destekli tam ark sabit protezler yapmak için geleneksel yöntem, ölçü materyalleri ile ölçü almak ve kalıp elde etmekten ibarettir. Ancak, bu teknikte birçok faktör ölçü kopinglerinin doğru pozisyonda transfer edilememesine veya bunların ölçü içinde mikro hareketlere maruz kalmasına neden olur. Dijital diş hekimliğinde, ağız içi tarayıcılarla alınan dijital ölçüler, klinik pratiğinde kapsamlı bir yer bulmaya başlasa da tam-ark implant destekli protezler için güvenilirliği tartışılmaya devam etmektedir. Fotogrametri, implantların konumlarının fotografik görüntüler aracılığıyla 3 boyutlu kaydedilmesini sağlayan bir başka seçenektir. Optik belirteçlerle alınan dijital ölçülerin CAD/CAM iş akışına aktarılmasıyla hata zinciri kısaltılır, hassasiyeti yüksek ve pasif oturan protezlerin üretilmesi amaçlanır.

Keywords

Fotogrametri, dijital implantoloji, pasif uyum, CAD/CAM

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