European Journal of Molecular & Clinical Medicine

Main purpose of dentistry is to deliver best dental care without causing any harm to the patient. To fulfill this purpose many developments and improvement in quality of several materials have come into existence in recent year. One such newly advanced material in dentistry is PEEK. PEEK is a metal free, semi-crystalline, high performance, beige-brown color material with excellent mechanical properties. This article is aimed to review on the clinical application of PEEK in Prosthodontics. An electronic literature search was done via PubMed, Embasse, Google scholar and 20 full text articles were included for this review.

Background and Aim: Screw loosening is one of the most common clinical dilemmas seen in the post operative phases of implant therapy. Screw loosening can lead to ultimate failure of the prosthesis thus entire treatment. Several factors are discussed by different researchers which are responsible for screw loosening. Therefore, this in vitro study was conducted to comprehensively assess the effect of different types of implant abutment with varying loading stresses on early screw loosening.  
Materials & Methods: This study was conducted in the department of Prosthodontics wherein total sixty implant abutment samples were included. Group 1 consisted of twenty standard types abutment. Group 2 consisted castable abutment. Group 3 consisted of CAD-CAM assisted implant abutment. A customized rectangular metal jig was fabricated in which implant fixture fits comfortably. Abutments were tightened over the implants with maximum of 30 Ncm. Dynamic stresses were applied independently on each sample assembly and unscrewing torques was noted carefully. P value less than 0.05 was considered significant (p< 0.05).
Statistical Analysis and Results: Statistical analysis was completed by using statistical software Mean torque value (Unscrewing Torques before Cyclic Loading) for group 1, 2 and 3 was 19.37, 17.82 and 17.43 respectively. Mean torque value (Unscrewing Torques after Cyclic Loading) for group 1, 2 and 3 was 18.17, 16.92 and 16.55 respectively. The measured standard deviation was 0.381, 0.637 and 0.032 for group 1, 2 and 3 respectively. P value was highly significant for group 1. The comparison among the 3 study groups using one-way ANOVA showed highly significant level of significance. Two sample t- test assessments of mean score and standard deviation in three groups showed highly imperative values.
Conclusion: Within the limitations of the study authors confirmed that there was not any significant different in the initial screw loosening stresses with various abutment systems. All the three experienced implant abutment systems showed insignificant change in screw loosening stresses after undergoing cyclic loading.

An implant supported crown or a conventional fpd is the most common treatment for the replacement of maxillary anterior teeth. The maxillary anterior region claims both esthetic and functional rehabilitation. The important factors involved in the replacement are - bone in the edentulous area, occlusal function, systemic conditions, socioeconomic status and willingness of the patients.The aim of this study was to assess the prevalence of tme duration for esthetic zone replacement after extraction. The study was conducted as a retrospective university-based study. Data of patients who underwent fpd treatment in maxillary anterior region was collected and analysed using SPSS software and the results were obtained. Chi square test was used to find the association between groups.The frequency rate of replacement of maxillary anterior was highest in the age group between 26 - 45 years (63.4 %). The frequency of replacement was higher in males (59.7 %) than in females. Most of the replacements were done at 2 months time interval. However, no statistically significant association was found between the groups.

According to the clinical condition and diagnostic findings, American College of prosthodontics (ACP) have developed a classification for partially edentulous patients. They are based on 4 criteria and each is based on 4 classification. The 4 criteria is based on location and extent of the edentulous span, condition of the abutment tooth ( localised adjunctive treatment, insufficient tooth structure), occlusal plane and the condition of the edentulous ridge. This classification is done to provide potential benefits to the clinicians and plan a proper treatment planning for the patients undergoing dental prosthesis. The adjunctive treatment are Periodontal treatment, endodontic treatment and orthodontic treatment involving any of the sextant. Fixed partial denture (FPD) is one of the most commonly employed treatments for replacement of missing teeth. Most of the patients prefer for a fixed replacement of the missing tooth. One such option is fixed partial denture. Splinting the adjacent teeth and replacing the missing teeth is how a fixed partial denture is done. The abutment teeth evaluation and its dental status is at most important for the success of the fixed partial denture. If there is any compromise in the dental status of the abutment teeth, adjunct therapy is done. This study aimed to identify the localised adjunctive treatment involved in the patient who had fixed partial denture treatment in a private dental hospital setup.