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PubMed This is a summary of 15 peer-reviewed journal articles Updated
Dentistry

Recognizing the Signs of Dentinogenesis Imperfecta Type 2

At a Glance

Dentinogenesis Imperfecta Type 2 (DGI-II) is a genetic condition causing amber, bluish-gray, or opalescent teeth. Because the underlying dentin is soft and weak, the outer enamel easily flakes off, leading to rapid tooth wear. Both baby and adult teeth are typically affected.

Dentinogenesis Imperfecta Type 2 (DGI-II) is a genetic condition that affects the development and structure of dentin, the sensitive middle layer of the tooth [1][2]. Because dentin forms the foundation of every tooth, defects in this layer lead to visible changes in the way teeth look and function [3]. Understanding these signs early can help you work with your dental team to preserve your or your child’s smile.

Visible Signs and Color Changes

The most striking feature of DGI-II is the unique color of the teeth. Unlike standard tooth discoloration caused by food or hygiene, this color comes from deep within the tooth structure [4].

  • Opalescent Appearance: Teeth often have a translucent, “glow-from-within” quality [1].
  • Color Spectrum: The teeth may appear amber, yellowish-brown, or a bluish-gray [1][3].
  • Widespread Impact: These color changes typically affect both the primary (baby) teeth and the permanent (adult) teeth [5].

This color occurs because the underlying dentin is hypomineralized (lacks enough minerals) and has a disorganized structure, which changes how light reflects through the outer enamel [4][6].

Why the Enamel Flakes Away

One of the most frustrating aspects of DGI-II is seeing the outer enamel chip or “shear” off, even when the enamel itself is relatively healthy [1]. This happens because of a failure at the Dentino-Enamel Junction (DEJ)—the microscopic “glue” that holds the enamel to the dentin [1][3].

In a healthy tooth, the DEJ is a strong, scalloped border that anchors the enamel. In DGI-II, the underlying dentin is too soft and weak to provide a stable foundation [6][7]. When you bite or chew (occlusal loading), the weak dentin gives way, causing the brittle enamel to lose its support and flake off in large pieces [1][3].

Rapid Progressive Attrition

Once the protective enamel flakes away, the soft, underlying dentin is exposed to the environment of the mouth [5]. This leads to a process called rapid progressive attrition—a very fast wearing down of the tooth surface [1][8].

  • Accelerated Wear: Because the dentin in DGI-II has lower hardness and less mineral content than normal, it wears down much faster than healthy teeth [9][10].
  • Loss of Height: In severe cases, the teeth can wear down until they are level with the gums [5].
  • Bite Changes: As teeth become shorter, the “height” of the bite—known as the Vertical Dimension of Occlusion (VDO)—begins to lose vertical height, which can alter facial appearance and cause potential jaw (TMJ) discomfort [11][12].

Internal Changes (What the X-ray Shows)

While the outside of the tooth shows wear, the inside of the tooth undergoes its own transformation. In DGI-II, the pulp chambers—the hollow spaces inside teeth that hold nerves and blood vessels—often become filled with extra dentin [13].

This process, called pulp chamber obliteration, means that the typical “hollow” look of a tooth on an X-ray disappears as the space is taken over by calcified tissue [14][15]. To learn more about how dentists view these internal changes, see Diagnosing DGI-II and Reading the X-rays.

Common questions in this guide

Why do teeth with dentinogenesis imperfecta type 2 look blue or amber?
The unique color comes from deep within the tooth. The underlying dentin layer lacks proper minerals and structure, which changes how light reflects through the outer enamel and gives the teeth an opalescent, amber, or bluish-gray appearance.
Why does the enamel flake off in DGI-II?
Enamel flakes off because the microscopic connection between the enamel and the underlying dentin is very weak. When you chew, the soft dentin gives way, causing the brittle outer enamel to lose its support and chip away in large pieces.
What is rapid progressive attrition?
Rapid progressive attrition is the exceptionally fast wearing down of the tooth surface. Once the protective enamel flakes off, the softer dentin is exposed and wears away quickly, which can make teeth shorter over time and alter the bite.
What does pulp chamber obliteration mean on a dental X-ray?
Pulp chamber obliteration means the hollow space inside the tooth, which normally holds nerves and blood vessels, becomes filled with extra dentin. On an X-ray, the tooth loses its typical hollow appearance and looks solid.
Are baby teeth affected by dentinogenesis imperfecta type 2?
Yes, DGI-II typically affects both primary baby teeth and permanent adult teeth, meaning structural weakness and color changes can be observed from a very early age.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Based on my child's current level of tooth wear, what is the most immediate priority for protecting the remaining tooth structure?
  2. 2.How would you describe the state of my child's 'vertical dimension' (bite height), and how are we monitoring it?
  3. 3.What signs of 'pulp obliteration' or hidden infections should we be looking for on future X-rays?
  4. 4.Because the enamel can flake off, what specific dietary or brushing modifications do you recommend to minimize further damage?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (15)
  1. 1

    Dentinogenesis imperfecta type II- genotype and phenotype analyses in three Danish families.

    Taleb K, Lauridsen E, Daugaard-Jensen J, et al.

    Molecular genetics & genomic medicine 2018; (6(3)):339-349 doi:10.1002/mgg3.375.

    PMID: 29512331
  2. 2

    A Novel DSPP Mutation in Dentinogenesis Imperfecta Shields Type II: Clinical, Genetic and Stem Cell Perspectives.

    Gao Q, Deng Z, Yang L, et al.

    International dental journal 2025; (75(5)):100937 doi:10.1016/j.identj.2025.100937.

    PMID: 40763686
  3. 3

    Dental Management of a Child with Dentinogenesis Imperfecta: A Case Report.

    Akhlaghi N, Eshghi AR, Mohamadpour M

    Journal of dentistry (Tehran, Iran) 2016; (13(2)):133-138.

    PMID: 27928242
  4. 4

    [Genetic variants analysis and histological observation of teeth in a patient with hereditary opalescent dentin].

    Li F, Liu Y, Liu HC, Feng HL

    Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences 2018; (50(4)):666-671.

    PMID: 30122769
  5. 5

    Dentinogenesis imperfecta type II: Diagnosis, functional and esthetic rehabilitation in mixed dentition.

    Kaur R, Karadwal A, Sharma D, Sandhu MK

    Journal of oral and maxillofacial pathology : JOMFP 2021; (25(Suppl 1)):S76-S80 doi:10.4103/jomfp.JOMFP_172_20.

    PMID: 34083977
  6. 6

    A novel hypothesis based on clinical, radiological, and histological data to explain the dentinogenesis imperfecta type II phenotype.

    Turkkahraman H, Galindo F, Tulu US, Helms JA

    Connective tissue research 2020; (61(6)):526-536 doi:10.1080/03008207.2019.1631296.

    PMID: 31284784
  7. 7

    Dentinogenesis imperfecta type II dentin: nanostructural mechanics analysis.

    Jia G, Tianle J, Haofu J, et al.

    BMC oral health 2025; (25(1)):906 doi:10.1186/s12903-025-06315-5.

    PMID: 40468273
  8. 8

    Early Rehabilitation of Incisors with Dentinogenesis Imperfecta Type II - Case Report.

    Beltrame AP, Rosa MM, Noschang RA, Almeida IC

    The Journal of clinical pediatric dentistry 2017; (41(2)):112-115 doi:10.17796/1053-4628-41.2.112.

    PMID: 28288297
  9. 9

    Nanoscopic wear behavior of dentinogenesis imperfecta type II tooth dentin.

    Mao J, Wang L, Jiang Y, et al.

    Journal of the mechanical behavior of biomedical materials 2021; (120()):104585 doi:10.1016/j.jmbbm.2021.104585.

    PMID: 34010797
  10. 10

    Tooth ultrastructure of a novel COL1A2 mutation expanding its genotypic and phenotypic spectra.

    Intarak N, Budsamongkol T, Theerapanon T, et al.

    Oral diseases 2021; (27(5)):1257-1267 doi:10.1111/odi.13657.

    PMID: 32989910
  11. 11

    An Aesthetic and Economic Approach of Smile Designing for a Patient With Dentinogenesis Imperfecta: A Rare Case Entity.

    Kumar A, Chirom B, Nongthombam R, et al.

    Cureus 2024; (16(2)):e53978 doi:10.7759/cureus.53978.

    PMID: 38469028
  12. 12

    Full Mouth Rehabilitation of Two Siblings with Dentinogenesis Imperfecta Type II Using Different Treatment Modalities.

    Alrashdi M, Schoener J, Contreras CI, Chen S

    International journal of environmental research and public health 2020; (17(19)) doi:10.3390/ijerph17197029.

    PMID: 32992978
  13. 13

    Dentinogenesis imperfecta type II in Swedish children and adolescents.

    Andersson K, Malmgren B, Åström E, Dahllöf G

    Orphanet journal of rare diseases 2018; (13(1)):145 doi:10.1186/s13023-018-0887-2.

    PMID: 30134932
  14. 14

    Novel frameshift mutations in DSPP cause dentin dysplasia type II.

    Lee JW, Hong J, Seymen F, et al.

    Oral diseases 2019; (25(8)):2044-2046 doi:10.1111/odi.13182.

    PMID: 31454439
  15. 15

    A family with homozygous and heterozygous p.Gly337Ser mutations in COL1A2.

    Udomchaiprasertkul W, Kuptanon C, Porntaveetus T, Shotelersuk V

    European journal of medical genetics 2020; (63(6)):103896 doi:10.1016/j.ejmg.2020.103896.

    PMID: 32081708

This page provides educational information about the signs of Dentinogenesis Imperfecta Type 2. It does not replace professional dental or medical advice; always consult your dentist for proper diagnosis and management.

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