Objective: The aim of this study is to determine the reasons for the removal of toothsupported fixed prosthetic restorations, and to investigate the relationship between the service length of a fixed prosthesis and the reason for its removal indicated by the clinician, the fabrication place, and the type of materials used in the fabrication of the prosthesis. Material and Methods: A questionnaire was prepared, and clinical examination was conducted, pertaining to the type of the fixed prosthesis, the service length of the fixed prosthesis, the reason for its removal indicated by the clinician, the number of units involved, the fabrication place, and the type of materials used in the fabrication of the prosthesis. Descriptive statistics, the chi-squared test, the Mann-Whitney U and the Kruskal-Wallis H tests, and the Spearman's rho correlation coefficient were used for statistical analysis. Statistical significance was assumed for p<0.05. Results: The mean service length of fixed prosthesis was 9,28±5,92 years, and the leading reasons for the removal of fixed prosthetic restorations were: renewal (29,7%), multiple reasons (23,2%), tooth extraction (11,6%), and apical pathology (8,4%), respectively. A statistical relationship was not found between the reasons for removal and the length of service of the fixed prosthesis (p>0.05). However, there was a statistically significant relationship between the length of service and the fabrication place and type of materials used in fabrication (p<0.05). Conclusion: The fabrication place and the type of materials used in fabrication are important parameters that determine the service length of the prosthesis.
Keywords: Fixed prosthetic restoration; removal reason; failure
Amaç: Bu çalışmanın amacı, sabit protetik restorasyonların söküm nedenlerini belirlemek ve sabit protezin hizmet süresi ile protez söküm nedeni, protezin yapıldığı yer ve protez materyali arasındaki ilişkiyi araştırmaktır. Gereç ve Yöntemler: Çalışma için sabit protezin tipi (kron veya köprü), sabit protezin hizmet süresi, klinisyen tarafından belirtilen söküm nedeni, üye sayısı, protezin yapıldığı yer (özel muayenehane, kamu hastanesi) ve protez materyaline ilişkin bilgileri kaydetmek üzere anket hazırlandı. Katılımcıların sosyo-demografik verileri ve oral hijyen alışkanlıkları da kaydedildi. Verilerin analizinde tanımlayıcı istatistikler, ki-kare, Mann-Whitney U, Kruskal Wallis H ve Spearman rho testleri uygulandı. p<0,05 seviyesinde anlamlı kabul edildi. Bulgular: Sabit protezin ortalama hizmet süresi 9,28±5,92 yıldı ve sabit protez restorasyonların söküm nedenlerini sırasıyla: yenileme (%29,7), çoklu nedenler (%23,2), diş çekimi (11,6) ve apikal patoloji (%8,4) oluşturmaktaydı. Sabit protezin hizmet süresi ile söküm nedeni arasında istatistiksel olarak anlamlı ilişki bulunmazken (p>0.05), protezin yapıldığı yer ve protez materyali ile ilişki bulunmaktaydı (p<0,05). Sonuç: Sabit protezin yapıldığı yer ve yapımda kullanılan materyal protezin hizmet süresini belirleyen önemli parametrelerdir.
Anahtar Kelimeler: Sabit protetik restorasyon; söküm nedeni; başarısızlık
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