Resin cement around tissue and bone level dental implants after two cementation techniques (An In Vitro Study)

Purpose: To detect the retained excess resin cement around tissue and bone level dental implants following two different cementation techniques.  Methods: Fourteen tissue level and fourteen bone level implants (OCO Biomedical, U.S.A.) were embedded in models (Salvin Dental Specialties, U.S.A.) having rubber surface simulating the gingiva. Twenty-eight metal copings were fabricated and cemented to the implant’s abutments by RelyX U200 resin cement (3M, U.S.A.). Each group was subdivided according to the cementation technique into two subgroups: A1 and B1: Tack cure of the excess cement for three seconds, the partially set resin cement was carefully removed before complete cure. A2 and B2: 1mm vent was performed on the occlusal surfaces. Excess cement was carefully removed followed by a final cure. Rubber coverage was removed, retained cement net weight was determined. All specimens were visually examined under 30x magnification using Stereomicroscope (SZ-11, Japan). Results: Tissue level implants following the tack cure protocol had less retained excess cement percentage than the occlusal vent protocol. Statistical comparison showed a significant difference in the excess cement percentage within the tissue level subgroups (p=0.018), No significant difference observed within the bone level subgroups (p=0.096).  &nbsp

Resin cement around tissue and bone level dental implants after two cementation techniques (an in vitro study)

Purpose: To detect the retained excess resin cement around tissue and bone level dental implants following two different cementation techniques.  Methods: Fourteen tissue level and fourteen bone level implants (OCO Biomedical, U.S.A.) were embedded in models (Salvin Dental Specialties, U.S.A.) having rubber surface simulating the gingiva. Twenty-eight metal copings were fabricated and cemented to the implant’s abutments by RelyX U200 resin cement (3M, U.S.A.). Each group was subdivided according to the cementation technique into two subgroups: A1 and B1: Tack cure of the excess cement for three seconds, the partially set resin cement was carefully removed before complete cure. A2 and B2: 1mm vent was performed on the occlusal surfaces. Excess cement was carefully removed followed by a final cure. Rubber coverage was removed, retained cement net weight was determined. All specimens were visually examined under 30x magnification using Stereomicroscope (SZ-11, Japan). Results: Tissue level implants following the tack cure protocol had less retained excess cement percentage than the occlusal vent protocol. Statistical comparison showed a significant difference in the excess cement percentage within the tissue level subgroups (p=0.018), No significant difference observed within the bone level subgroups (p=0.096).&nbsp

Magnetic resonance imaging (MRI) evidence of sacroiliitis in skin psoriasis patients: Relation to disease severity

Background: Psoriasis is a disease of autoimmune imbalance in a genetically susceptible individual. It has a wide range of mild to severe cases. On the contrary to cutaneous affection which attracts the patient attention to seek medical help, articular affection can have a delayed diagnosis. Aim of the work: This study aimed to detect radiologic evidence of sacroiliitis in psoriasis patient not under treatment for articular disease. Patients and methods: Twenty skin psoriasis patients participated in the study. None had been previously diagnosed with articular manifestations related to psoriasis. Imaging of the sacroiliac joint by magnetic resonance imaging- Short TI inversion recovery technique (MRI- STIR technique) was ordered for all patients. The presence of bone marrow edema in T2 weighted image was considered diagnostic of active sacroiliitis. Psoriasis areas and severity index (PASI) score was used to assess skin psoriasis severity. Results: Patients were 11 female and 9 males with mean age of 31 ± 5.7 years and mean disease duration of 6.9 ± 3.1 years. The mean PASI score was 19.5 ± 5.2. Clinical sacroiliitis was detected in 25% of patients, plantar fasciitis in 35% and Achilles tendinitis in one patient (5%). MRI with STIR technique was positive for unilateral sacroiliitis showing bone marrow edema in 3 (15%) patients; one male and two females. There was no association between PASI score and presence of radiologic sacroiliitis. Conclusion: Radiologic sacroiliitis is not uncommon in skin psoriasis patients not known to have articular involvement and was not related to the skin disease severity