Objectives: The goal of this clinical study was to evaluate the effect of digitally fabricated removable partial denture frameworks, constructed from new milled peek material (Juvora) on the abutment teeth in distal extension bases versus the conventional metallic frameworks.
 

Materials and methods: Twenty partially edentulous patients with distal extension bases were participated in this study. They were randomly divided into two groups. For Group I, a removable partial denture (RPD) frameworks were constructed from milled peek (Juvora).While for group II,(the control group) A conventional casted cobalt chromium RPD frameworks were constructed. Then after delivery of the RPDs,

their effects on the abutment teeth supporting structures were evaluated after 3,6,12 months of follow-up. Pocket depth, gingival index as well as bone height changes were assessed for each abutment tooth .The results were tabulated and statistically analyzed.
 

Results: There was statistically significant difference between the two groups, after six and twelve months of follow up regarding the pocket depth and after twelve months of follow up for the gingival index scores. However , the bone height changes values of milled PEEK RPD group was lower than that of the conventional RPD, but the difference was statistically insignificant throughout the follow up periods, as p

value >0.05.There was gradual increase in the all measured parameters in the two studied groups throughout the follow up period.

 

Conclusion: The digitally fabricated removable partial denture frameworks, constructed from new milled peek material (Juvora) showed more favorable effect on the abutment teeth in distal extension bases than the conventional metallic frameworks in terms of Pocket depth, gingival index as well as bone height changes. However, there were inevitable changes associated with RPD insertion.

Streptococcus mutans and Streptococcus sobrinus have been considered to be the most important pathogens associated with dental caries.The purpose of current study is to detect and correlate the presence of S. mutans and S. sobrinus in the dental plaque of caries active patients using conventional methods, analytical profile index analysis and polymerase chain reaction (PCR) for identification of gtfI and

gtfB of streptococcus species. Total of 130 carries and saliva mixed gingival fluid samples were collected from dental patients attending Outdoor Patient department (OPD) of University Dental Hospital, The University of Lahore during 2017. The samples were cultured on blood agar, subsequently shifted to mannitol salt agar (MSA). Each of the similar colony was than subjected for microbiological and molecular

analysis using specific gentotype primers. It is revealed that 1mm pink colonies on MSA showed gram positive cocci bacteria arranged in chains under microscope and amplified 512bp and 712bp amplicon size PCR product for S. mutans and S. sobrinus respectively. The samples obtained from male dental patients ranging 8-10 years were 100% confirmed as S. mutans and S. sobrinus using either of the technique. Similarly, in female dental patients the highest prevalence of S. mutans (83.33%) and S. sobrinus (66.6%) were observed in same age group. Furthermore, the gender base frequency of S. mutans were found higher in male caries active patients (64.6%) as compare to female caries active patients (56.9%) while for S. sobrinus, the percentage positivity was observed comparatively lower in male dental patients (29.2%) than female (43%). The overall prevalence of S. mutans and S. sobrinus in all the samples were 67.52% and 40.17% respectively. Antibiotic susceptibility test results revealed that all screened isolates was highly sensitive to Chloramphenicol (C), Amoxicillin (AMX), Ciprofloxacin (CIP), Erythromycin (E) Tetracycline (TE) and Ampicillin (AM). Whereas, were resistant to Cefixime (CFM), Clindamycin (CD), Spectinomycin (SPT) and Kanamycin (K).

With dental implants increasing in popularity as alternative treatment choices to conventional dentures and bridges, the complications associated with them are progressively emerging too. Abutment screw fracture is a technical complication associated with implant prosthetic treatment. This case report describes a simple and safe technique to retrieve a fractured implant abutment screw just by engaging surface irregularity of the screw fragment and using spinning action of bur