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Biomedical subjects

M A Fayyad

Publications and source records attributed to M A Fayyad.

17 recordsLinked to original sources
PubMed2005

A radiographic study of the prevalence of endodontically treated teeth and procedural errors of root canal filling.

The aim of this radiographic investigation was to study procedural errors encounterd in root canal treatment in a Jordanian population as evidenced using periapical radiographs A total of 2380 periapical radiographs including 3178 endodontically treated teeth were assessed in respect of the quality of endodontic treatment. The results indicated that the prevalence of endodontically treated teeth in the maxilla was higher than that in the mandible ( P < 0.001 ), the maxillary central incisors have the highest prevalence of endodontic treatment, and the maxillary second molars have the lowest prevalence of endodontic treatment. In respect of the quality of endodontic treatment, 30.2% of endodontically treated teeth exhibited an ideal length of root canal filling, 23.64% of the evaluated teeth were mummified, 37.45% of the teeth have short root canal fillings, 6.25% were overfilled, 1.35% were with preparations which deviated from the line of the root canal and 1.10% of the evaluated teeth have perforations of the root walls or the floor of the pulp chamber. It is concluded that the Maxillary teeth were found to be endodontically treated more frequently than the mandibular teeth, anterior teeth were found to be endodontically treated more than premolar and molar teeth, maxillary central incisors have the highest prevalence of endodontic treatment whilst the maxillary second molars have the lowest prevalence. The quality of endodontic treatment was disappointing. Therefore, emphasis on continuing education and post graduate courses in endodontics must be a priority in Jordan.

Bicuspid↗
PubMed1997

Failure of dental bridges. IV. Effect of supporting periodontal ligament.

The relationship between bridge failure and the periodontal ligament area of their abutments was studied in 156 dental bridges constructed for 132 patients. Of the bridges constructed at the College of Dentistry, King Saud University, 26.9% did not meet the published criteria of Ante's Law while 50.0% of those made in general dental practice did not meet the same criteria. However, radiographic evaluation of abutment teeth in 56 failed bridges revealed that there were only two cases with evidence of overloading the abutments.

Adolescent↗
PubMed1996

Failure of dental bridges. I. Age and sex of patients and distribution of replaced and abutment teeth.

In this study, 156 dental bridges, constructed in 132 randomly selected patients were evaluated. There was no significant difference between the number of bridges placed in males and the number placed in females. However, the results revealed that the maxillary arch received more prostheses than the mandibular arch. The most-frequently replaced teeth were the mandibular first molars and the least-frequently replaced were mandibular canines. Maxillary second premolars, the mandibular second premolars and the mandibular second molars were the most frequent teeth used as abutments.

Adolescent↗
PubMed1996

Failure of dental bridges. II. Prevalence of failure and its relation to place of construction.

In this investigation 156 dental bridges, constructed for 132 individuals, were evaluated. The bridges inserted at the College of Dentistry, King Saud University (KSU), Saudi Arabia, were compared with those placed in general dental practice. The results revealed that the rate of bridge failure averaged 35.5%. This was made up from failure of bridges inserted at KSU at (15.4%) and those in general dental practice (46.2%). The major reasons for failure revealed by this study were periodontal disease (36.6%) and secondary caries (23.2%). The average lifespan for the bridges was 6.1 years with 4.5 years for the unfailed bridges. The most commonly used material for bridges was metal-ceramics. The most commonly used pontic design was the modified ridge lap (50.8%), but the saddle type accounted for the greatest percentage of failures (59.6%).

Acrylic Resins↗
PubMed1996

Failure of dental bridges: III--Effect of some technical factors.

In this investigation 156 dental bridges, inserted for 132 individuals, were evaluated. Three-unit bridges accounted for the majority of fixed appliances surveyed. The results revealed that the mean longevity of the failed bridges was 6.1 years. There was no relation between the number of units in a bridge and its duration of service. The results also revealed that metal-ceramic retainers were the most commonly used in the series but exhibited the shortest duration of successful service. Of 325 abutments, 11.4% were endodontically treated and 10.8% of those were associated with periapical lesions. Periapical lesions were associated with 4.2% of the abutments presumed vital prior to the study.

Dental Abutments↗
PubMed1995

A visual method of determining marginal placement of crowns: Part I. Marginal placement of anterior crowns.

The cervical margins of crowns are often placed subgingivally to satisfy patients' demands for esthetics, even though subgingival margins can adversely affect gingival health. Photographs of 527 Saudi citizens (285 men and 242 women) with natural and exaggerated smiles were recorded to determine if subgingival margins are always necessary. The photographs indicated that a substantial percentage of the participants did not display the gingival tissue of their anterior teeth during a natural smile. (Percentages ranged from 43.5% to 69.8% of maxillary teeth and from 93.7% to 97.9% of mandibular teeth). The percentage of subjects who did not reveal the gingival tissue of their maxillary anterior teeth during an exaggerated smile ranged from 22.7% to 39.3%; the percentage of mandibular anterior teeth ranged from 54.1% to 72.7%. There was no statistically significant difference between men and women regarding visibility of anterior teeth. Thus, a substantial number of these subjects could receive anterior crowns with supragingival margins without sacrificing esthetics.

Crowns↗
PubMed1995

A visual method of determining marginal placement of crowns: Part II. Marginal placement of posterior crowns.

In the second part of a two-part study on the necessity for subgingival crown placement, photographs of 527 Saudi citizens (285 men and 242 women) with natural and exaggerated smiles were made. The photographs revealed that a substantial percentage of the participants did not exhibit the gingival tissue of their posterior maxillary teeth (41.7% to 70.2%) and mandibular teeth (92.8% to 98.5%) during a natural smile. A comparison of the posterior tooth visibility of male and female subjects revealed statistically significant differences in the following situations: the gingival section of maxillary first molars, the occlusal section of the mandibular first molars, and the occlusal section of the second premolars during a natural smile, and the occlusal section of the mandibular first and second premolars during an exaggerated smile. Therefore, an analysis of each individual's smile should be included among the factors considered when placement of coronal margins is determined.

Bicuspid↗
PubMed1993

Replacement of missing teeth in sites with insufficient space: a case report.

Composite resin-retained fixed partial dentures are widely accepted as an alternative to conventional prostheses. This article describes the treatment of a patient in whom both maxillary lateral incisors were missing and space for normal-sized pontics was insufficient. The incisors were replaced bilaterally with a resin-bonded fixed partial denture consisting of a cantilevered resin-bonded framework with a ceramic pontic that overlapped the mesial portion of the canine's facial aspect. This design created an esthetically acceptable prosthesis through a conservative and simple approach.

Adult↗
PubMed1991

Prevalence of traumatized permanent incisors in Jordanian children, according to age, sex and socio-economic class.

The purpose of this retrospective study was to analyse firstly the prevalence of firsty fractured permanent incisors, secondly their distribution according to age, sex and socio-economic class and thirdly the location of the trauma, in a population sample of schoolchildren from Jordan. The sample consisted of 3041 children aged 7-12 years enrolled in 6 public and private schools from the city of Amman and its outskirts. The prevalence of fractured permanent incisors was 10.5% (12.1% in boys and 8.8% in girls). The largest number of injuries was observed in the 11-12 years group (15.0%) and there was an increase of the prevalence of trauma associated with the increase of age. Significantly more boys suffered injuries than girls (P less than 0.01). The teeth most commonly injured were the maxillary central incisors (79.1%) and 85.2% of children sustained one fractured tooth only. The numbers of traumatized children in each of the low and middle socio-economic classes were significantly higher than those in the high socio-economic class.

Age Factors↗
PubMed1989

Marginal seal of injection-molded ceramic crowns cemented with three adhesive systems.

This in vitro investigation evaluated the marginal seal of an injection-molded ceramic crown system used in combination with three adhesive luting systems. One of these systems was a glass-ionomer cement and the other two were based on composite resin materials. One of the latter materials is claimed by the manufacturer to bond to tooth structure and also to porcelain. The final luting material was used in conjunction with a commercially available porcelain bonding system and specific dentin bonding pretreatments. Following thermocycling, the marginal seal of the crowns was tested by use of a chemical marker intrusion technique. The extent of leakage along the sectioned crown/luting agent/tooth structure interfaces was recorded by using digital imaging microscopy. Minimal microleakage was demonstrated with the composite luting cement used in association with specific porcelain and dentin bonding pretreatments.

Adhesives↗