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Biomedical subjects

A Ben-Yehouda

Publications and source records attributed to A Ben-Yehouda.

10 recordsLinked to original sources
PubMed1997

Progressive cervical root resorption related to tetracycline root conditioning.

Root resorption is reported as a microscopic finding in trials attempting to regenerate the periodontium using tetracycline or citric acid root conditioning. This report deals with a case of progressive cervical root resorption in a female patient who had been successfully treated by tetracycline root conditioning. The article emphasizes the possibility of this adverse effect, and discusses a possible mechanism inducing this phenomenon.

Adult↗
PubMed1994

The effect of post-surgical flap placement on probing depth and attachment level: a 2-year longitudinal study.

Postsurgical flap placement might affect the outcome of the operative procedure. Modified Widman flap surgery with primary closure and flap approximation (usually away from the bone crest) and apically positioned flap surgery with near crestal bone positioning are both widely used in surgical periodontal treatment. Several comparative investigations have studied these modalities, however, none have been able to show conclusively that either is superior to the other. The purpose of this longitudinal study was to explore the optimal postsurgical flap placement in respect to final probing depth and changes in clinical attachment level. Following routine hygienic phase of treatment, 12 subjects (186 teeth) with adult periodontitis received surgical periodontal treatment. Prior to the flap surgery, probing depth and clinical attachment level were recorded. Sounding depth measurements were taken to record postoperative flap placement. Patients were placed on a 3-month maintenance program. Probing depth and clinical attachment level were again measured at 2 years postoperatively and compared to baseline measurements. An overall positive correlation (R = 0.43; P = 0.0248) was found between immediate postoperative sounding measurements and probing depth after 2 years. Conversely, attachment level changes over the 2-year period showed only weak inverse correlation (R = 0.27; P = 0.0121) with sounding depth measurement immediately postsurgically. Sites where postoperative sounding depth were < or = 3 mm had a mean probing depth (2.52 mm) which was significantly (P < 0.001) smaller compared to sites with sound depth > or = 4 mm (3.58 mm). Changes in clinical attachment level varied between sites and sounding depth groups; however, none of these differences were statistically significant. Based on our findings it is suggested that following periodontal flap surgery, in those cases where minimal probing depth is desired, the flap be secured to the underlying structures at or slightly coronally to the bone crest (< or = 3 mm).(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1994

Lack of evidence for hypophosphatasia as a factor in the pathogenesis of early-onset periodontitis.

Hypophosphatasia, an inheritable metabolic disorder affecting calcification, has been shown to have various oral manifestations. Recently, it was suggested that it may serve as a predisposing factor in the pathogenesis of early-onset periodontitis. The present study was designed to examine the frequency of hypophosphatasia among patients with juvenile periodontitis and rapidly progressive periodontitis. Eighteen patients, nine females and nine males (age 19-37 years, mean 23.2 years), were included in this study. Venous blood and urinary samples were collected and assayed for alkaline phosphatase and urinary phosphoethanolamine. Mean alkaline phosphatase levels (109 +/- 35 IU/L) were within the normal limits for all patients except one who exhibited slightly lower than normal values. Urinary phosphoethanolamine, a typical marker of hypophosphatasia, was absent from all specimens, which rules out the possible diagnosis of such disorder in these patients. Until more information is available, the role of hypophosphatasia as a predisposing factor in early-onset periodontitis is yet to be established.

Adult↗
PubMed1991

Sounding depth measurements: a method for evaluating various surgical techniques.

Fourteen patients undergoing periodontal treatment for moderate to severe adult-type periodontitis were included in the study. Seven patients (a total of 210 sites) were treated with modified Widman flap surgery while the other 7 patients (the same number of sites) were treated with apically-positioned flap surgery. The 2 modalities were compared using sounding depth measurements before and immediately after surgery. The mean sounding depth decreased from 4.89 mm to 3.42 mm in the modified Widman flap group, compared to a drop from 4.77 mm to 2.46 mm in the apically-positioned flap group. Neither of these procedures resulted in the total eradication of all periodontal pockets. The final outcome of modified Widman flap surgery may, at times, result in zero sounding depth (placement of the flap at the crest of the bone); on the other hand, very often the flap was placed far supra-crestally in an intended apically-positioned flap procedure. This lack of consistency between intended and actual flap placement would suggest that studies which try to compare different treatment modalities using a flap approach should include sounding depth measurements immediately post-surgery. This is needed to assure that the intended procedure has actually been carried out.

Alveolar Process↗
PubMed1991

Multiple therapy approach to juvenile periodontitis: a case report.

Various therapeutic techniques for the treatment of juvenile periodontitis are reported in the literature, with occasional contradictory results. One of the reasons for the contradictory results may be differences in patient selection and/or response to treatment. The following report describes the results of various treatment modalities, in different sites in the same individual, on localized juvenile periodontitis.

Adult↗
PubMedDate not supplied

Self-performed subgingival irrigation--a case report.

Self-performed subgingival irrigation with 0.2% chlorhexidine is a simple method of treating isolated, deep periodontal pockets which do not respond favorably to conventional treatment techniques. Subgingival irrigation is most efficient in the anterior region, where it can be easily performed, and the results (resolution of inflammatory signs and pocket reduction) can be achieved within a short period of time (2-4 weeks). A case is presented whereby a non-surgical treatment of a patient with advanced adult type periodontal disease was used. After completion of active therapy, clinical and radiographic follow-up were maintained for three years. The need to depend on the patients's skill and cooperation may, however, limit the use of this technique.

Aged↗