Manungso Lawas

Dental Wear

[2-5-14J vbm]@informasi atau data age-at-death PERLU sebab diperlukan u/ kajian2 demografi,paleopatologi & social identity [1600:197]

[2-5-14J vbm]@penentuan age-at-death u/ juvenile lebih mudah [1600:197]

[2-5-14J vbm]@FUNGSI DW
Observation of dental wear patterns is one of the most commonly utilised methods of ageing adult skeletal remains in archaeology [1600:198]

[18mar12M vbm] 988
# The study of attrition patterns was carried out on the first lower molar [LM1], as it is the first permanent molar to erupt, and therefore is exposed to a longer time of abrasive diet. The short life expectancy of the Natufian-Neolithic people (Eshed et al., 2004b), and the fact that the third molar is commonly missing among Natufians (Smith, 1973), make M1 the best choice. To define patterns of tooth wear, 10 teeth, each exhibiting different levels of attrition, were carefully selected from each of the three populations (Fig. 1) [988:147]

# Attrition rates (degree) were recorded on a scale of 1–10, using the scoring system of Littleton and Frohlich (1993). There were two major reasons for using the system of Littleton and Frohlich (1993): 1) it combines previous methods (Scott, 1979; Costa, 1982; Maat et al., 1990) into a single, integral chart; and 2) the method was applied to other Near Eastern populations, allowing easy and reliable comparison [988:147]

[988:148]: attrition varied as:
1. Least worn: point or small dentine exposure in one or more cusps;
2. Moderately worn: dentine exposure in two closed cusps and/or dentine continuity in two or more cusps; and
3. Most worn: half of the crown or more is worn, and/or secondary dentine appears (Hillson, 1986)

^^ Pawon
^^ DW
^^ Lempeng
^^ S-22
^^ Sampung
^^ Perak man
^^ Liang Toge
^^ Wajak
[19-4-14St vbm]
dental wear score 5/3/12

# Molnar’s well known Dental Wear scoring system involves a 1-8 ordinal scale based upon the number of dentine patches and the amount of secondary dentine present on the occlusal surface of a tooth [1537:213]

# Scott [1979] is also ordinal, but involves a 4-40 scale based upon the amount of enamel present on the occlusal surface of the tooth [of American Indian: Indian Knoll, Ft ancient culture and Mississippian culture], because the amount of enamel left on the tooth is the best indicator of the functional life of the tooth [1537:213]

# Secondary dentine provides a “second enamel” but not all individuals in population exhibit secondary dentine. Therefore, it is important to focus upon the amount of enamel present, rather than the amount of secondary dentine present [1537:213]

# The procedure for recording occlusal attrition of molars: divide the occlusal surface of the molar into 4 equal quadrants. Score each quadrant according to the 1-10 scale. The sum of the four quadrants is the score for that tooth [1537:213]

# After the major occlusal features have worn off (scores 1-4) the amount of dentine exposure relative to the amount of enamel present in the quadrant is considered [1537:213]

^^ Scores 1-4: the major occlusal features have worn off [memudar]
^^ Score 5: worn patch covers one-fourth of quadrant or less
^^ Score 6: worn patch greater than one-fourth of quadrant area but still completely surrounded by enamel
^^ Score 7: enamel only partially surrounds worn patch (dentine exposure), being present on two “flanks” or “sides” of the patch
^^ Score 8: enamel occurs on only one side of the worn patch (usually on the outer rim) and the enamel is thick to medium on this edge
^^ Score 9: only a thin strip of enamel is present in the quadrant and it may be worn through at one or more places
^^ Score 10: no enamel is left on any part of the quadrant

# Most of the prehistoric Indian Knoll individuals were likely hunters and collectors with a concentration upon riverine shell fish. The Ft ancient and Mississippian sties represent a food producing horticultural strategy with complex social organization and stratification [1537:214]

# The DW scoring of Scott (1979) is designed to supplement Molnar’s procedure [1537:216]

# The DW scoring of Scott for expressing degree of wear is preferable to Molnar’s if the objective is a principal axis analysis of DW, or by extension, any analysis dealing with [berurusan dg] rate of wear rather than central tendency expressions of degree. It must be pointed out that DW of Scott is useful for molars [1537:217]

# Among primitive peoples dental attrition appears to be a natural phenomenon. Often the degrees and kinds of tooth wear vary from population to population. This variability is possibly related to certain material aspects of culture such as diet, food preparation techniques and tool usage. In order to learn about these relationships, extensive cross cultural comparison must be made [1536:175]

# Dietary specialization and division of labor appear to be responsible for the degree and type of wear [1536:175]


Kerstin Engel DW hominoid

Murphy & Smith DW score

Lovejoy DW score

Dental attrition
dental wear [2] 02/02/2-12

^^ Dental wear1
^^ Dental wear2

Dental wear 30/01/2012


[14jan12 irishway]



[27-4-14M vbm]@GUNA DW
Wear [menjd aus] patterns can be used to make inferences about diet [makanan], food preparation techniques & habitual activities involving the teeth. Dental attrition [erosi, pengurangan] is also important source of data on the age structure of prehistoric populations [p.169 ]


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