Amaç: Dişsiz alan geometrisinin yani doğrusal ya da kavisli bir dişsiz alan varlığının, dijital ölçü doğruluğu üzerindeki etkisinin değerlendirilmesidir. Gereç ve Yöntemler: İki farklı alçı model oluşturulmuştur. Bu modellerden birinde (Model A) dişsiz alan düz bir geometridedir ve 47-45-43 no.lu dişler bölgesine implant yerleştirilmiştir. İkinci modelde ise dişsiz alan kavisli bir geometriye sahiptir ve implantlar 43-31-33 no.lu dişler bölgesine yerleştirilmiştir. Dijital ölçü gruplarında; CS3600, Itero Element 2, Primescan ve Trios 4 olmak üzere 4 farklı tarayıcı kullanılmıştır. Her bir tarayıcı ile 10 defa tarama yapılmış, taramaların hepsi tecrübeli bir kullanıcı tarafından yapılmıştır. Referans modeller endüstriyel bir tarayıcı ile dijitalize edilmiştir ve elde edilen referans dijital veri ile tarayıcılardan elde edilen veriler özel bir bilgisayar yazılımı (Geomagic Control X) kullanılarak çakıştırılmıştır. Üç boyutlu sapma miktarını belirlemede ortalama sapmanın karesinin karekökü sonucu kullanılmıştır. İstatistiksel analizlerde bağımsız gruplar t-testi ve tek yönlü varyans analizi kullanılmıştır. İstatistiksel anlamlılık p<0,05 olarak kabul edilmiştir. Bulgular: Hiçbir tarayıcı grubunda Model A ile Model B arasında anlamlı farklılık saptanmamıştır (p>0,05). Her iki modelde tarayıcılar arasında sapma değerleri bakımından istatistiksel olarak anlamlı fark olduğu saptanmıştır (p<0,001). Itero tarayıcısına ilişkin sapma değerlerinin CS3600, Primescan ve Trios 4 tarayıcılarından büyük olduğu; Primescan tarayıcısına ilişkin sapma değerlerinin CS3600 ve Trios 4 tarayıcılarından büyük olduğu tespit edilmiştir (p<0,05). Sonuç: Kullanılan tarayıcılarla alınan dijital ölçülerde, dişsiz alan geometrisi ve kavis varlığının ölçü doğruluğuna herhangi bir etkisinin olmadığı saptanmıştır. Trios 4 tüm tarayıcılardan daha düşük sapma değeri gösterirken, Itero cihazı her iki modelde de tüm tarayıcılardan daha yüksek sapma değerleri göstermiştir.
Anahtar Kelimeler: Dental implant; dental ölçü; ağız içi tarayıcı; dijital dental ölçü
Objective: To evaluate the effect of edentulous area geometry, namely the presence of a linear or curved edentulous area, on digital measurement accuracy. Material and Methods: Two different plaster models were created. In one of these models (Model A), the edentulous area is in a flat geometry and the implant is placed in the teeth area 47-45-43. In the second model, the edentulous area has a curved geometry and the implants are placed in the teeth area 43-31-33. In digital measure groups; 4 different scanners were used, namely CS3600, Itero Element 2, Primescan and Trios 4. 10 scans were made with each scanner, all scans were made by an experienced user. The reference models were digitized with an industrial scanner and the obtained reference digital data and the data obtained from the scanners were matched using a special computer software (Geomagic Control X). The root mean square of the mean deviation was used to determine the amount of 3-dimensional deviation. Independent groups test and one-way analysis of variance were used for statistical analysis. Statistical significance was accepted as p<0.05. Results: No significant difference was found between Model A and Model B in any of the scanner groups (p>0.05). There was a statistically significant difference in deviation values between the scanners in both models (p<0.001). The deviation values for the Itero scanner are greater than the CS3600, Primescan and Trios 4 scanners; it was determined that the deviation values of the Primescan scanner were greater than the CS3600 and Trios 4 scanners (p<0.05). Conclusion: Digital impressions that are taken with the scanners used showed that the edentulous area geometry and the presence of curvature do not have any effect on the measurement accuracy. Trios 4 showed lower deviation than all scanners, while Itero device showed higher deviation values than all scanners in both models.
Keywords: Dental implant; dental impression; intraoral scanner; digital dental impression
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