Evidence map›Paper›PMID 32308325›Full record

ArticleContemporary clinical dentistry

Effect of Indigenously Developed Nano-Hydroxyapatite Crystals from Chicken Egg Shell on the Surface Hardness of Bleached Human Enamel: An

Divya Kunam, Vidhya Sampath, Sujatha Manimaran, Mahalaxmi Sekar

Abstract read
In one paragraph

Article in Contemporary clinical dentistry. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed.

  1. Biological and Mechanical Comparison of Eggshell-Derived Hydroxyapatite, Calcium Hydroxide, and Mineral Trioxide Aggregate.Australian endodontic journal : the journal of the Australian Society of Endodontology Inc · 2026
    Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Remineralization Effect of Calcium Glycerophosphate in Fluoride Mouth Rinse on Eroded Human Enamel: AnJournal of International Society of Preventive & Community Dentistry
    Article
  8. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Divya KunamDepartment of Conservative Dentistry and Endodontics, Narayana Dental College and Hospital, Nellore, Andhra Pradesh, India.
Vidhya SampathDepartment of Conservative Dentistry and Endodontics, SRM Dental College, Chennai, Tamil Nadu, India.
Sujatha ManimaranDepartment of Conservative Dentistry and Endodontics, SRM Dental College, Chennai, Tamil Nadu, India.
Mahalaxmi SekarDepartment of Conservative Dentistry and Endodontics, SRM Dental College, Chennai, Tamil Nadu, India.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveThe objective was to evaluate the effect of nano-hydroxyapatite (nHA) derived from chicken eggshell on bleached human enamel in comparison with commercial casein phophopeptide-amorphous calcium phosphate (CPP-ACP) paste using Vickers microhardness test. MATERIALS AND

methodsnHA powder was prepared from chicken eggshell using combustion method. nHA slurry was prepared by mixing 1.8 g of nHA powder with 0.3 ml of distilled water. Forty intact maxillary anterior teeth were collected and decoronated, and the crowns were embedded in acrylic mold with the labial enamel surfaces exposed. Baseline microhardness evaluation was done (T

resultsBleaching with HP significantly decreased the enamel microhardness. CPP-ACP and nHA derived from chicken eggshell increased the enamel microhardness significantly. There was no significant difference in microhardness values among the CPP-ACP and nHA groups.

conclusionNano-hydroxyapatite sourced from chicken eggshell was as effective as CPP-ACP in remineralizing and restoring the lost microhardness of bleached enamel.

Indexed as

Casein phophopeptide-amorphous calcium phosphatechicken eggshellshydrogen peroxidemicrohardnessnano-hydroxyapatite

Identifiers

PMID32308325
PMCPMC7150555

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.