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Related Experiment Videos

Marginal bone level in the normal primary dentition.

B Sjödin1, L Matsson

  • 1Postgraduate Dental Education Center, Orebro, Sweden.

Journal of Clinical Periodontology
|October 1, 1992
PubMed
Summary
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The normal radiographic distance between the cemento-enamel junction (CEJ) and marginal bone level (MBL) in primary teeth is typically 1.0 mm. Factors like permanent tooth eruption can influence this measurement.

Area of Science:

  • Pediatric Dentistry
  • Periodontology
  • Dental Radiology

Background:

  • Establishing normal radiographic parameters is crucial for diagnosing periodontal conditions in primary dentition.
  • The cemento-enamel junction (CEJ) to marginal bone level (MBL) distance is a key indicator of periodontal health.

Purpose of the Study:

  • To determine the normal radiographic CEJ-MBL distance in primary teeth.
  • To identify physiological and pathological factors influencing this distance.

Main Methods:

  • Radiographic and clinical examinations of primary molars and canines in 128 children aged 7-9 years.
  • Measurements included CEJ-MBL distance, plaque, bleeding on probing, probing depth, and tooth mobility.
  • Statistical analysis using chi-squared test and variance components analysis.

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Main Results:

  • The overall mean CEJ-MBL distance was 1.0 mm, with a range of 0.0-4.0 mm.
  • Eruption of permanent teeth and exfoliation of primary teeth were associated with larger CEJ-MBL distances.
  • Excluding these factors yielded a CEJ-MBL range of 0.0-2.0 mm.

Conclusions:

  • The normal radiographic CEJ-MBL distance in primary dentition is generally within 2.0 mm when accounting for specific developmental stages.
  • These findings provide a baseline for assessing periodontal status in children's primary teeth.