The researchers in this study set out to do just that by investigating what goes wrong with people's permanent dental prostheses in Libya. One hundred patients from the clinic in Gharyan, Libya, who had come in complaining of problems with their fixed dental prostheses were included in the study, and the reasons for their failure were categorized using Manappallil's system. Failures in Class 3 accounted for 30% of all failures, Class 4 for 24%, Classes, 2, and 4 for 8%, Classes 5 and 6 for 15%, and Class 6 for 11%. Class 1 for 8%, Class 2 for 12%, Class 4 for 24% Class 5 for 15 % and Class 6 for 11%. Unserviceable restorations due to poor margins were indicated as the most common cause of failure in class 3 failures in the current study. Keywords: Rehabilitation, Fixed partial dentures, Failure classification, success

Penicillin is a drug commonly used as an antibiotic agent. It is among the earliest discoveries made. It is a natural compound released to the environment by fungi (Penicillium notatum). Penicillin was discovered by Alexander Fleming in 1928 (Davies and Davies, 2010).

 Penicillin is found in various diverse forms and mostly obtained from Penicillium. The basic structures of penicillin and its derivatives are generally very similar and closely related. Penicillin and its derivatives generally have the similar basic ring β-lactam structure, which is formed by valine and cysteine amino acids through an intermediate tripeptide. The tripeptide third amino acid is substituted by an acyl group and this acyl group has specific functions and properties on penicillin and its derivatives

Penicillin G is one of the most used penicillin against microbes and it is not stable in gastric hydrochloric acid (Barker CI,2017). Oral intake of penicillin G is destroyed by stomach gastric acid before its absorbed in the blood and before it acts at the microbial infection site. Hence its route of administration is intra-muscular injection

penicillin is the most effective drug on Gram-positive bacteria. It is also known not to be effective on Gram-negative bacteria and fungi., penicillin act on the bacterial cell wall by breaking it down. Hence this leads to the death of the bacteria.Penicillin is a drug commonly used as an antibiotic agent. It is among the earliest discoveries made. It is a natural compound released to the environment by fungi (Penicillium notatum). Penicillin was discovered by Alexander Fleming in 1928 (Davies and Davies, 2010).

 Penicillin is found in various diverse forms and mostly obtained from Penicillium. The basic structures of penicillin and its derivatives are generally very similar and closely related. Penicillin and its derivatives generally have the similar basic ring β-lactam structure, which is formed by valine and cysteine amino acids through an intermediate tripeptide. The tripeptide third amino acid is substituted by an acyl group and this acyl group has specific functions and properties on penicillin and its derivatives

Penicillin G is one of the most used penicillin against microbes and it is not stable in gastric hydrochloric acid (Barker CI,2017). Oral intake of penicillin G is destroyed by stomach gastric acid before its absorbed in the blood and before it acts at the microbial infection site. Hence its route of administration is intra-muscular injection

penicillin is the most effective drug on Gram-positive bacteria. It is also known not to be effective on Gram-negative bacteria and fungi., penicillin act on the bacterial cell wall by breaking it down. Hence this leads to the death of the bacteria.

ABSTRACT

The goal of this study was to investigate the occurrence and distribution of hyperdontia, hypodontia (which

includes mesiodens and fused teeth), talon cusps, microdontia (which includes peg-shaped lateral incisors), and

macrodontia in patients attending private dental clinics in Gharyan, Libya. During ordinary patient

examinations, the inquiry was undertaken clinically and radiographically. A total of 1219 participants were

included in the study (358 males and 861 females). 57 of patients had dental anomalies in the percentage of

(4.67%), 21 patients (1.72%) had missing teeth, 15 of them had one missing permanent tooth and 6 patients had

two missing permanent teeth (the lower 2nd premolar was the most tooth loss 0.49%). In addition, the study

showed that 16 patients had supernumerary teeth, 10 patients had microdontia and 7 patients had macrodontia,

whereas, two patients had talon cusp. Early detection of a treatable abnormality is critical in developing a

thorough treatment strategy for the patient. Some of the unpleasant impact should be avoidable. In some

circumstances; functional, cosmetic, and occlusal discord can be detected early enough to warrant interpret of

sessional consultation and treatment.

KEYWORDS: dental anomalies; hypodontia; microdontia; macrodontia

Phase I intervention in a skeletal

Class III case can involve

maxillary traction with a facemask,

often combined with rapid

maxillary expansion, followed by

orthodontic correction using Class

III mechanics.1 After cessation of

growth, however, treatment options

may be limited to surgical orthodontic

therapy.2,3 Although surgical treatment might produce

the best results, many patients reject

this option due to apprehension,

cost, or esthetic concerns.4-6

Orthodontic camouflage treatment

is possible in borderline cases, but

it is difficult to decompensate the

dentition and correct the occlusion

without jeopardizing the dentalperiodontal

equilibrium.

ABSTRACT

The goal of this study was to investigate the occurrence and distribution of hyperdontia, hypodontia (which

includes mesiodens and fused teeth), talon cusps, microdontia (which includes peg-shaped lateral incisors), and

macrodontia in patients attending private dental clinics in Gharyan, Libya. During ordinary patient

examinations, the inquiry was undertaken clinically and radiographically. A total of 1219 participants were

included in the study (358 males and 861 females). 57 of patients had dental anomalies in the percentage of

(4.67%), 21 patients (1.72%) had missing teeth, 15 of them had one missing permanent tooth and 6 patients had

two missing permanent teeth (the lower 2nd premolar was the most tooth loss 0.49%). In addition, the study

showed that 16 patients had supernumerary teeth, 10 patients had microdontia and 7 patients had macrodontia,

whereas, two patients had talon cusp. Early detection of a treatable abnormality is critical in developing a

thorough treatment strategy for the patient. Some of the unpleasant impact should be avoidable. In some

circumstances; functional, cosmetic, and occlusal discord can be detected early enough to warrant interpret of

sessional consultation and treatment.

KEYWORDS: dental anomalies; hypodontia; microdontia; macrodontia

The most common antibiotics prescribed by dentists for dental infections in Gharyan city and neighbour regions

Abstract

Purpose: The purpose of this study was to evaluate the fitness of mandibular Kennedy class I PEEK removable partial dentures fabricated with various techniques.

Materials and Methods: Six patients were selected for this study with maxillary completely edentulous arch against mandibular distal extension ridges posterior to canine teeth. each patient was randomly given the following frameworks in a crossover design; Group I: All patients were received PEEK frameworks fabricated by milling via CAD-CAM technique (PEEK disc were used). Group II: All patients were received PEEK frameworks fabricated by injection molding technique (Granular form of medical grade PEEK). For each framework (milled & injected), the fitness evaluation were done by measuring the gap between the framework and oral structures by evaluation the thickness of light body poly vinyl- siloxane impression material.

Results: The mean overall and site specific values of Gap distance beneath frameworks fabricated by CAD-CAM technique was significantly higher than the mean values of Gap distance in frameworks fabricated by injection technique.

Conclusion: Within the limitations of this short-term clinical study it was concluded that: 1) The fitness of both techniques of the RPD PEEK BioHPP frameworks manufacture were clinically accepted by the participants. 2) The RPD PEEK BioHPP frameworks manufactured by CAD / CAM was less fitness values than BioHPP frameworks constructed by Injection molding technique.

The type VI secretion system (T6SS) is a multi-protein complex that injects bacterial effector proteins into target cells. It is composed of a cell membrane complex anchored to a contractile bacteriophage tail-like apparatus consisting of a sharpened tube that is ejected by the contraction of a sheath against a baseplate. We present structural and biochemical studies on TssA subunits from two different T6SSs that reveal radically different quaternary structures in comparison to the dodecameric E. coli TssA that arise from differences in their C-terminal sequences. Despite this, the different TssAs retain equivalent interactions with other components of the complex and position their highly conserved N-terminal ImpA_N domain at the same radius from the centre of the sheath as a result of their distinct domain architectures, which includes additional spacer domains and highly mobile interdomain linkers. Together, these variations allow these distinct TssAs to perform a similar function in the complex.

placing anterior dental implant is a challenging procedure for dental professional