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    Volume 33, Issue 3 (May 1988)

    Individuality of Human Palatal Rugae

    (Received 25 June 1987; accepted 7 August 1987)


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    Investigators have implied that palatal rugae are unique to each individual. However, these researchers have disagreed as to whether or not legal identification could be based solely on palatal rugae. Previous studies used poor duplicating materials and may not have considered the effects of growth, extractions, palatal expansion, or some combination of these. The inadvertent use of other features of the cast, such as teeth, edentulous ridge morphology, muscle attachments, vestibular depth, or some combination of these, to aid in the identification, may have influenced their results. The purpose of this investigation was to determine if palatal rugae can be relied upon for identification.

    Twenty-five orthodontic cases were selected with pre- and post-treatment casts: orthodontic treatment had taken eighteen to sixty months. One hundred casts were randomly selected as variables. All casts were trimmed so that all areas except for the rugae area of the hard palate were removed. The twenty-five post-orthodontic casts were dispersed within 100 randomly selected casts. Nine investigators were given the twenty-five pre-orthodontic casts and asked to compare them to the other one hundred and twenty-five casts for possible matches. Data were collected as to percentage of correct matches and time required for comparison.

    Each set of pre- and post-orthodontic casts was properly identified (100%) by 8 investigators, and the remaining investigator correctly matched 22 out of 25 casts (88%).

    These conclusions were drawn. The team approach significantly reduced the time required to make correct matches; it appears that the palatal rugae pattern is sufficiently characteristic to discriminate between individuals; and this study supports the hypothesis that palatal rugae are unique and identification could be based upon their comparison.

    Author Information:

    Summitt, JB
    Colonel, Wilford Hall USAF Medical Center/SGDG, Lackland Air Force Base, TX

    Oesterle, LJ
    Colonel, USAF Reg. Med. Center, Wiesbaden,

    Brannon, RB
    Colonel, Wilford Hall USAF Medical Center/SGDM, USAF Academy, CO

    Robison, SF
    Colonel, Wilford Hall USAF Medical Center/SGDG, Lackland Air Force Base, TX

    Morlang, WM
    Colonel, HQ ATC/SGD, Randolph Air Force Base, TX

    English, WR
    Major, CO

    Stock #: JFS12479J

    ISSN: 0022-1198

    DOI: 10.1520/JFS12479J

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    Title Individuality of Human Palatal Rugae
    Symposium , 0000-00-00
    Committee E30