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Biomedical subjects

M Abou-Rass

Publications and source records attributed to M Abou-Rass.

At least 19 recordsLinked to original sources
PubMed1998

Long-term prognosis of intentional endodontics and internal bleaching of tetracycline-stained teeth.

A total of 112 severely tetracycline-stained teeth in 20 patients were treated by endodontics and nonthermal internal bleaching. All teeth were healthy, intact, and had no history of trauma. The patients were monitored for 5 to 15 years. Excellent, permanent esthetic results were obtained with no side effects. The quality of endodontic treatment and lingual access restoration were important factors in the longevity of the bleaching results.

Adult↗
PubMed1998

Clinical and microbiological aspects of the Sargon immediate load implant.

A maxillary lateral incisor with severe periodontal destruction was extracted after forced eruption and was replaced with a Sargon Immediate Load Implant. The clinical and microbiological results of the case are reported. The Sargon Immediate Load Implant is an apically expandable, quintapodal, root-form dental implant, designed to be loaded immediately with a provisional fixed restoration in normal occlusion.

Dental Implantation, Endosseous↗
PubMed1998

Microorganisms in closed periapical lesions.

The purpose of this study was to investigate the microorganisms of strictly selected closed periapical lesions associated with both refractory endodontic therapy and pulpal calcification. Definitive criteria were established that assured complete clinical isolation of the periapical lesion from the oral and periodontal environment. A total of 13 criteria-referenced lesions were selected from 70 patients with endodontic surgical indications. A well controlled culturing method was used in all cases and samples were taken by one clinician at three separate sites during each surgery. Samples taken at the surgical window and within the body of the lesion served as controls, whilst a third sample was taken at the apex. In all 13 cases, samples taken from the apex yielded microorganisms comprising 63.6% obligate anaerobes and 36.4% facultative anaerobes. Prevalence of the isolated species was 31.8% for Actinomyces sp., 22.7% Propionibacterium sp., 18.2% Streptococcus sp., 13.6% Staphlyococcus sp., 4.6% Porphyromonas gingivalis, 4.6% Peptostreptococcus micros and 4.6% Gram-negative enterics. The results of this investigation indicate that closed periapical lesions associated with calcified teeth or those resistant to root canal treatment harbour bacteria. The inability to eradicate all root canal microorganisms during root canal treatment, along with anatomical factors, may allow further bacterial colonization of the root apex and surrounding periapical tissues, and consequently prevent healing.

Bacteria, Anaerobic↗
PubMed1993

Endodontic treatment finalization--a systematic endodontic-restorative approach.

Endodontic Treatment Finalization, a system integrating the fields of endodontics, periodontics and restorative dentistry, consists of ordered and logically sequenced steps to determine and provide the extent of treatment needed. The system is presented, along with both scientific and opinion-based rationale for its use.

Clinical Protocols↗
PubMed1992

Post and core restoration of endodontically treated teeth.

This review discusses the multifactorial nature of tooth strength and concludes that endodontic treatment alone does not weaken intact anterior teeth. Therefore, restoration of such teeth does require post placement or full-coverage restorations. Posterior teeth, however, require full-coverage protection. It appears that the full-crown restoration "covers up" some of the disadvantages or deficiencies of some post and core restorations. The literature supports the use of the amalgam coronal-radicular core or the post-retained amalgam core, as well as the composite post and core. The literature does not support use of the glass ionomer post and cores. As to which post system to select, the literature indicates that the parallel-sided, serrated Para-Post or Para-Post plus is a safe post when seated passively in the canal and cemented with zinc phosphate cements or composite resin cement, or when retained with amalgam. Dentin-retained, stress-producing posts such as the threaded posts should be avoided.

Carbon↗
PubMed1990

Endodontic file design and dynamics in automated root canal preparation. Concepts, materials and methods.

Many treatment failures in endodontics are caused by problems that occurred during canal preparation. This article reviews principles of endodontic instrument design and analyzes the design as it relates to an automated handpiece. After a review of the problems of automation, there will be an introduction of a new automated handpiece and a new modified file known as the Anticurvature File.

Equipment Design↗
PubMed1982

The stressed pulp condition: an endodontic-restorative diagnostic concept.

The stressed pulp condition is a clinical concept that describes pulps that have received repeated previous injury and survived with diminished responses and lessened repair potentials. Before performing restorative dentistry the dentist should conduct a comprehensive pulpal health evaluation on teeth to be restored. This evaluation should include (1) traditional pulp-testing methods and (2) a review of the past, present, and planned future treatment of the tooth. This analysis will usually identify teeth with stressed pulp conditions. Teeth with stressed pulps should be treated before complex restorative dentistry.

Crowns↗
PubMed1982

Evaluation and clinical management of previous endodontic therapy.

Endodontic recall studies and clinical experience have resulted in more universal criteria for acceptable and unacceptable endodontic treatment. Before the initiation of restorative treatment on teeth previously treated endodontically, the prosthodontist should evaluate the quality of endodontic treatment to assure that it will provide a risk-free, permanent, solid foundation for the future restorative work. Lack of symptoms alone does not indicate success of endodontic treatment. Radiographic evaluation is also not sufficient. The prosthodontist should use a thorough and combined evaluation of the endodontic history, radiographic evaluation, and tooth and tissue examination, as well as physically assess the treatment of all canals and their seals. As a rule, endodontics of questionable quality should be retreated by way of the canal. The removal of defective restorations is done to facilitate the retreatment effort and assure the soundness of tooth structure. Following retreatment, the tooth is restored and healing of the patient is followed up. Surgical endodontics is avoided unless retreatment is first attempted or the quality of previous root canal therapy is acceptable or the canal obstructed.

Clinical Competence↗