Biomedical subjects

K Fareed

Publications and source records attributed to K Fareed.

7 recordsLinked to original sources

PubMed1994

Lateral and protrusive contact schemes and occlusal wear: a correlational study in a young adult Saudi population.

This study investigated the influence of occlusal contacts on the location and severity of occlusal wear during various mandibular movements. The study population consisted of 80 dental students with a mean age of 22 years, within the age range of 19 to 25 years. A dentition wear index--in addition to anterior, canine, and posterior subindexes--was derived from a tooth-by-tooth evaluation of casts. Lateral excursive and protrusive contact relationships were obtained by clinical examination. There was no correlation between the distribution of occlusal wear and the type of lateral excursive contact scheme. The location of contacts in protrusive movement demonstrated a distinct correlation with occlusal wear in overall severity and distribution according to segmental wear subindexes. The results indicate that the role of "disclusive protection" in the occurrence of occlusal wear may be questioned; the efficacy of "mutual protection" is similarly unsubstantiated, and the results lend further support to the concept of multifactorial etiology of occlusal tooth wear.

Adult↗

PubMed1993

Comparison of the prevalence, severity and possible causes of occlusal tooth wear in two young adult populations.

Most reports of the prevalence and severity of tooth wear in contemporary Western populations claim that advanced wear in uncommon by comparison with certain non-Western populations. Differing methods of wear evaluation in the various studies, however, preclude accurate comparisons from being made. This study records mean total and segmental wear indices obtained from the casts of a selected Swedish patient population sample, and age- and sex-matched Saudi high-wear and random samples. The wear experience of the Saudi random sample compared favourably with that of the Swedish selected one, while the wear of the Saudi high-wear sample was significantly higher than that of the Swedish sample (P < 0.01). The findings from a questionnaire revealed certain significant correlations between aetiological factors and wear, most notably, the relatively greater presence of bruxism (P < 0.01), absence of biting habits and minimal cola consumption (P < 0.01) in the Swedish sample. Harsh environmental and climatic conditions probably account for the Saudi experience of high wear.

Adolescent↗

PubMed1991

Analysis of possible factors influencing the occurrence of occlusal tooth wear in a young Saudi population.

The purpose of this study was to attempt to correlate possible etiologic factors with the occurrence of occlusal tooth wear in a young Saudi population. The material comprised 90 individuals with a mean age of 22 years within a range of 19-25 years. A dentition wear index, in addition to anterior and posterior wear subindices were derived from tooth-by-tooth evaluations of casts. Factors found to correlate significantly with increased occlusal wear were bruxism, biting habits such as pen- and nail-biting, use of an indigenous chewing-stick called miswak, and high intake of fruit juices. There was no correlation between subjects from differing geographic and/or climatic habitats and the severity of tooth wear. The common element of a harsh desert terrain may constitute the dominant passive abrasive etiologic factor in the present sample.

Adult↗

PubMed1990

Prevalence and severity of occlusal tooth wear in a young Saudi population.

An epidemiologic investigation of the prevalence and severity of occlusal wear was carried out in a young Saudi population. Occlusal wear was evaluated on a tooth-by-tooth basis on study casts made for 206 dental students, using an ordinal scale. The reliability of the scale was assessed by percentage inter- and intra-observer concordance. The mean occlusal wear was high for the population studied. The sample presented the highest wear scores in the incisor region, maxillary canines, and mandibular molars. Comparison with other studies of similarly aged Western populations showed a more extensive pattern of wear in the present sample, pointing to the possible role of environmental influences.

Adult↗

PubMed1989

Making a fixed restoration contour guide.

A silicone matrix of the diagnostic wax-up of the abutment teeth serves as a guide during tooth preparation and final contouring of the restoration. A cast with the castings on it with surrounding gingival tissues formed in silicone is made. This cast, along with the silicone matrix, provides the technician with definite guides for the axial contouring of the tooth-colored portion of the fixed restoration.

Dental Abutments↗

PubMed1989

Vital root retention: a clinical procedure.

Retention of vital roots retards the resorption of residual alveolar ridges under complete dentures. It also eliminates the patient's responsibility of maintaining the periodontal health of overdenture abutments. The procedure involves (1) preparing the teeth to be retained from a periodontal standpoint to reduce the possibility of contamination of the surgical site, (2) removing hopeless teeth, (3) sectioning and contouring the teeth so that the retained roots are contiguous with the crestal bone, (4) preparing and suturing labial and lingual flaps to cover the prepared roots and maintain proper vestibular depth, and (5) placing an immediate denture relined with tissue-conditioning material.

Adult↗

PubMed1989

Bone stress distribution for three endosseous implants.

Axisymmetric finite element models of three geometries were evaluated: a serrated solid with a 2-degree taper and a rectangular cross section; a cylindrical screw-type solid; and a finned solid with a 1 degree 9' taper and a circular cross section. Ten moduli of elasticity ranging from 0.348 to 74.96 psi x 10(6) were used for each geometry. Contour plots of the resulting Von Mises stresses were used to study the changing stress distribution patterns within the surrounding cortical bone. The results indicated that the serrated geometry led to high-stress concentrations at the tips of the bony ingrowth and near the neck of the implant. Low moduli of elasticity emphasized these concentrations. The nontapered screw-type geometry had high-stress concentrations at the base of the implant when high moduli were studied and at the neck of the implant when low moduli were studied. The conclusion of this study was that a tapered endosseous implant with a high elastic modulus would be most suitable for dental implantology. However, the design must not cause high-stress concentrations at the implant neck that commonly cause bone resorption.

Alveolar Process↗