Abstract
BackgroundImplant-supported fixed restorations are considered as the standard treatment for replacement of missing teeth. These can be either screw or cement retained. The success or failure of implant restorations depend upon amount of marginal bone loss (MBL). The present study is to determine the MBL around cement and screw-retained implant prosthesis and to determine various predictors of the MBL.Material and MethodsA retrospective charts review was conducted at the dental clinics, Aga Khan University Hospital, Karachi from February 2017 to June 2017 in which 104 implants restorations were assessed using periapical radiographs. MBL was calculated at baseline and at 12 months and the difference was recorded on a proforma. SPSS version 21.0 was used for statistical analysis. Descriptive statistics was computed. Generalized estimation equation analysis (GEE) was applied to determine the predictors of MBL. Level of significance was kept at ≤ 0.05.ResultsThere were 104 implant restorations belonging to 41 patients. Screw retained prosthesis showed significantly greater MBL than cement retained prosthesis (p-value =0 .018) (irrespective of crowns or fixed partial dentures). Other factors that turned out to be significant predictors of MBL were male gender (p-value= <0.01), age >65 yrs. (p-value=0.028) and sites where bone grafting was performed (p-value=0.003).ConclusionsMale patients of age >65 yrs. with sites needing bone grafts who were provided with screw retained prosthesis (irrespective of crown or fixed partial dentures) had significantly greater marginal bone loss around implants. Key words:Dental implants, dental prosthesis, implant supported dental prosthesis, alveolar bone loss.
Highlights
Fixed implant-supported restorations have shown predictable success as a modality of treatment for missing teeth [1]
Subtracting the bone level at 0 month from the bone level at 12 months measured the amount of marginal bone loss (MBL) for both the cement-retained and screw-retained prosthesis
Descriptive statistics including mean and standard deviation was computed for MBL in both the groups
Summary
Fixed implant-supported restorations have shown predictable success as a modality of treatment for missing teeth [1]. Appearance and mastication of partially or totally edentulous patients have been greatly improved using implant based restorations [3,4] These restorations can be screw or cement retained to the implant, or both [4,5]. Implant-supported fixed restorations are considered as the standard treatment for replacement of missing teeth These can be either screw or cement retained. Screw retained prosthesis showed significantly greater MBL than cement retained prosthesis (p-value =0 .018) (irrespective of crowns or fixed partial dentures). With sites needing bone grafts who were provided with screw retained prosthesis (irrespective of crown or fixed partial dentures) had significantly greater marginal bone loss around implants Other factors that turned out to be significant predictors of MBL were male gender (p-value= 65 yrs. (p-value=0.028) and sites where bone grafting was performed (p-value=0.003) Conclusions: Male patients of age >65 yrs. with sites needing bone grafts who were provided with screw retained prosthesis (irrespective of crown or fixed partial dentures) had significantly greater marginal bone loss around implants
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