eMedicine Specialties > Dermatology > Diseases of the Oral Mucosa

Oral Frictional Hyperkeratosis: Multimedia

Author: Catherine M Flaitz, DDS, MS, Professor of Oral and Maxillofacial Pathology and Pediatric Dentistry, Department of Diagnostic Sciences, University of Texas Health Sciences Center at Houston, Dental Branch
Coauthor(s): Alfredo Aguirre, DDS, MS, Director of Advanced Oral and Maxillofacial Pathology Training Program, Professor, Department of Oral Diagnostic Sciences, State University of New York at Buffalo; Jose Luis Tapia, DDS, MS, Assistant Professor, Department of Oral Diagnostic Sciences, State University of New York at Buffalo
Contributor Information and Disclosures

Updated: Jul 27, 2009

Multimedia

The white line observed on the cheek is level wit...
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Media file 1: The white line observed on the cheek is level with the biting plane of the teeth. The wear on the occlusal surfaces of the molar teeth suggests that the patient had a habit of bruxism. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.
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The white line observed on the cheek is level wit...

The white line observed on the cheek is level with the biting plane of the teeth. The wear on the occlusal surfaces of the molar teeth suggests that the patient had a habit of bruxism. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.

Prominent linea alba with evidence of cheek bitin...
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Media file 2: Prominent linea alba with evidence of cheek biting. The white line shows a slightly scalloped appearance, which correlates with the buccal surfaces of the teeth against which the mucosa is rubbed. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.
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Prominent linea alba with evidence of cheek bitin...

Prominent linea alba with evidence of cheek biting. The white line shows a slightly scalloped appearance, which correlates with the buccal surfaces of the teeth against which the mucosa is rubbed. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.

This wider area of roughened mucosa is typical of...
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Media file 3: This wider area of roughened mucosa is typical of those produced by the habit of cheek biting or nibbling. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.
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This wider area of roughened mucosa is typical of...

This wider area of roughened mucosa is typical of those produced by the habit of cheek biting or nibbling. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.

This frictional keratotic line shows a roughened ...
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Media file 4: This frictional keratotic line shows a roughened surface. A thicker patch of mucosa is at the anterior end (under the tongue blade edge). This area is exactly level with the occlusal plane and was being chewed constantly by the patient (same patient as in Media File 5). Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.
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This frictional keratotic line shows a roughened ...

This frictional keratotic line shows a roughened surface. A thicker patch of mucosa is at the anterior end (under the tongue blade edge). This area is exactly level with the occlusal plane and was being chewed constantly by the patient (same patient as in Media File 5). Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.

Anterior rough surface area at the occlusal plane...
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Media file 5: Anterior rough surface area at the occlusal plane of the teeth (same patient as in Media File 4). Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.
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Anterior rough surface area at the occlusal plane...

Anterior rough surface area at the occlusal plane of the teeth (same patient as in Media File 4). Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.

Oral frictional hyperkeratosis of the lateral bor...
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Media file 6: Oral frictional hyperkeratosis of the lateral border of the tongue from chronic biting habit. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.
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Oral frictional hyperkeratosis of the lateral bor...

Oral frictional hyperkeratosis of the lateral border of the tongue from chronic biting habit. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.

Oral frictional hyperkeratosis of the attached ma...
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Media file 7: Oral frictional hyperkeratosis of the attached maxillary gingiva from inappropriate toothbrushing technique. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.
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Oral frictional hyperkeratosis of the attached ma...

Oral frictional hyperkeratosis of the attached maxillary gingiva from inappropriate toothbrushing technique. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.

Oral frictional hyperkeratosis of the retromolar ...
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Media file 8: Oral frictional hyperkeratosis of the retromolar pad is also referred to as a ridge callus. This lesion is caused by masticatory irritation. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.
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Oral frictional hyperkeratosis of the retromolar ...

Oral frictional hyperkeratosis of the retromolar pad is also referred to as a ridge callus. This lesion is caused by masticatory irritation. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.

Low-power view of stratified squamous epithelium ...
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Media file 9: Low-power view of stratified squamous epithelium with marked hyperkeratinization, acanthosis, and a prominent granular cell layer. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.
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Low-power view of stratified squamous epithelium ...

Low-power view of stratified squamous epithelium with marked hyperkeratinization, acanthosis, and a prominent granular cell layer. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.

High-power view of the surface keratin layer and ...
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Media file 10: High-power view of the surface keratin layer and a prominent granular cell layer. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.
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High-power view of the surface keratin layer and ...

High-power view of the surface keratin layer and a prominent granular cell layer. Courtesy of Catherine M. Flaitz, DDS and Alfredo Aguirre, DDS.

More on Oral Frictional Hyperkeratosis

Overview: Oral Frictional Hyperkeratosis
Differential Diagnoses & Workup: Oral Frictional Hyperkeratosis
Treatment & Medication: Oral Frictional Hyperkeratosis
Follow-up: Oral Frictional Hyperkeratosis
Multimedia: Oral Frictional Hyperkeratosis
References
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References

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Further Reading

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Keywords

oral frictional hyperkeratosis, FK, frictional keratosis, friction keratosis, oral friction keratosis, oral lesion, denture friction, broken teeth, fractured, teeth, oral hyperkeratinization, toothbrush keratosis, tongue thrust keratosis, chronic cheek biting, chronic lip biting, cheek bite keratosis, lip bite keratosis, morsicatio buccarum, morsicatio linguorum, ridge callus, oral ridge callus

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Contributor Information and Disclosures

Author

Catherine M Flaitz, DDS, MS, Professor of Oral and Maxillofacial Pathology and Pediatric Dentistry, Department of Diagnostic Sciences, University of Texas Health Sciences Center at Houston, Dental Branch
Catherine M Flaitz, DDS, MS is a member of the following medical societies: American Academy of Oral and Maxillofacial Pathology, American Academy of Oral Medicine, American Academy of Pediatric Dentistry, American Dental Association, International Association for Dental Research, and International Association of Oral Pathologists
Disclosure: Nothing to disclose.

Coauthor(s)

Alfredo Aguirre, DDS, MS, Director of Advanced Oral and Maxillofacial Pathology Training Program, Professor, Department of Oral Diagnostic Sciences, State University of New York at Buffalo
Alfredo Aguirre, DDS, MS is a member of the following medical societies: American Academy of Oral and Maxillofacial Pathology
Disclosure: Nothing to disclose.

Jose Luis Tapia, DDS, MS, Assistant Professor, Department of Oral Diagnostic Sciences, State University of New York at Buffalo
Disclosure: Nothing to disclose.

Medical Editor

Daniel J Hogan, MD, Clinical Professor of Internal Medicine (Dermatology), NOVA Southeastern University; Investigator, Hill Top Research, Florida Research Center
Daniel J Hogan, MD is a member of the following medical societies: Alpha Omega Alpha, American Academy of Dermatology, American Contact Dermatitis Society, and Canadian Dermatology Association
Disclosure: Nothing to disclose.

Pharmacy Editor

Michael J Wells, MD, Associate Professor, Department of Dermatology, Texas Tech University Health Sciences Center
Michael J Wells, MD is a member of the following medical societies: Alpha Omega Alpha, American Academy of Dermatology, American Medical Association, and Texas Medical Association
Disclosure: Nothing to disclose.

Managing Editor

Drore Eisen, MD, DDS, Consulting Staff, Department of Dermatology, Dermatology Research Associates of Cincinnati
Drore Eisen, MD, DDS is a member of the following medical societies: American Academy of Dermatology, American Academy of Oral Medicine, and American Dental Association
Disclosure: Nothing to disclose.

CME Editor

Catherine Quirk, MD, Clinical Assistant Professor, Department of Dermatology, Brown University
Catherine Quirk, MD is a member of the following medical societies: Alpha Omega Alpha and American Academy of Dermatology
Disclosure: Nothing to disclose.

Chief Editor

Dirk M Elston, MD, Director, Department of Dermatology, Geisinger Medical Center
Dirk M Elston, MD is a member of the following medical societies: American Academy of Dermatology
Disclosure: Nothing to disclose.

 
 
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