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Clinical Oral Investigations

, Volume 18, Issue 5, pp 1525–1531 | Cite as

The necessity of a test reading after 1 week to detect late positive patch test reactions in patients with oral lichen lesions

  • Camilla Ahlgren
  • Marléne Isaksson
  • Halvor Möller
  • Tony Axéll
  • Rolf Liedholm
  • Magnus Bruze
Original Article

Abstract

Objectives

Establishing the clinical relevance of contact allergy to dental materials in patients with oral lichen lesions (OLL) may be difficult, and tests are often read only on day 3 or day 4; also, concentration of the tested allergens may vary. Several studies on dermatitis patients have shown that additional positive patch test reactions can be found after day 4. Therefore, the aim of the present study was to analyse the frequency of late positive reactions to potential allergens in patients with OLL.

Material and methods

Eighty-three of 96 consecutive patients with biopsy-verified OLL were patch-tested with a recently developed lichen series. The patches were removed after 48 h and reactions read 3 and 7 days after application.

Results

A total of 129 contact allergies were found, and 26 (20.2 %) of the allergic reactions in 23 patients were seen on day 7 only. The 25.2 % increase in positive test reactions with an additional reading on day 7 in addition to day 3 was statistically significant. Metals were the substances with the highest frequency of late positive reactions.

Conclusions

Patients with OLL cannot be considered properly investigated with regard to contact allergy, unless the testing has been performed with mandatory readings on day 3 (or day 4) and day 7.

Clinical relevance

Late patch test readings are crucial in order to elucidate the role of contact allergy to dental materials in the aetiology of OLL.

Keywords

Epicutaneous tests Late positive test reactions Dental materials Oral lichen lesions 

Notes

Acknowledgments

The National Board of Health and Welfare, Sweden and The Swedish Dental Association funded the study. We thank Monica Andersson and Bodil Sjöström for skilful assistance with the patients.

Conflict of interest

All authors have read and approved the manuscript; contributions to the manuscript are as follows:

Camilla Ahlgren, main author and responsible for all administration including ethical application, scientific compilation as well as clinical dental and main editorial work.

Magnus Bruze, medical supervisor, test readings and manuscript editing.

Halvor Möller, medical supervisor, test readings and manuscript editing.

Marléne Isaksson, medical supervisor, test readings and manuscript editing.

Tony Axéll, oral medicine advisor and clinical dental work as well as manuscript editing.

Rolf Liedholm, oral medicine advisor and clinical work as well as manuscript editing.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Camilla Ahlgren
    • 1
  • Marléne Isaksson
    • 2
  • Halvor Möller
    • 2
  • Tony Axéll
    • 3
  • Rolf Liedholm
    • 4
  • Magnus Bruze
    • 2
  1. 1.Department of Prosthodontics, Faculty of OdontologyMalmö UniversityMalmöSweden
  2. 2.Department of Occupational and Environmental Dermatology, Skåne University Hospital MalmöLund UniversityMalmöSweden
  3. 3.Maxillofacial UnitHalmstad Hospital HallandHalmstadSweden
  4. 4.Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of OdontologyMalmö UniversityMalmöSweden

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