The Problem of Overbite in Class II,Division 2 Malocclusion

Abstract

The paper studies 60 Class II, Division 2 malocclusions, from lateral skull radiographs taken before treatment and at least 1 year after the end of retention. In the first part of the paper the nature of the malocclusion is analysed. It usually exhibits a Class II skeletal pattern, and while this is on average milder than for Class II, Division I, there is a marked variation between individuals. Other factors are a high inter-incisal angle, a high lip-line, and in some cases a small lower facial height. The upper and lower facial heights, on the other hand, are not appreciably greater than normal.

The results of treatment are then analysed. Successful overbite reduction would seem to be associated with a reduction in inter-incisal angle and a relative lowering of the lower lip-line. Growth appears to be important in achieving overbite reduction. It is suggested that favourable rotation of the mandible may be a factor in overbite reduction in some cases, and this would repay further study.

Finally attention is turned to the effect of incisor proclination. This was usually more successful in the lower jaw, but again there was wide individual variation.

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References

Atherton

J. D.

(1964) The influence of the face height upon the incisor occlusion and lip posture Transactions of the British Society for the Study of Orthodontics, 87–91.

Backlund

(1958) Overbite and the incisor angle Transactions of the European Orthodontic Society, 277–285.

Backlund

(1960) Tooth form and overbite Transactions of the European Orthodontic Society, 97–103.

Ballard

C. F.

(1956) Morphology and treatment of class II, Division 2 occlusions Transactions of the European Orthodontic Society, 44–54.

Bjørk

(1947) The face in profile Svensk Tandlakare Tidskrift 40, Supplement 5B, 1–180.

Bjørk

(1963) Variations in the growth pattern of the human mandible Journal of Dental Research, 42, 400–411.

Bjørk

(1969) Prediction of mandibular growth rotation American Journal of Orthodontics, 55, 585–599.

Blair

E. S.

(1954) A cephalometric roentgenographic appraisal of the skeletal morphology of Class I, Class II Division I and Class II Division 2 (Angle) malocclusions Angle Orthodontist, 24, 106–119.

Fleming

H. B.

(1961) An investigation of the vertical overbite during the eruption of the permanent dentition Angle Orthodontist, 31, 53–62.

10.

Gould

M. S. E.

and Picton

D. C. A.

(1968) A study of pressures exerted by the lips and cheeks on the teeth of subjects with Angle's class II Division I, class II Division 2 and Class III malocclusions, compared with those of subjects with normal occlusion Archives of Oral Biology, 13, 527–541.

11.

Houston

W. J. B.

(1967) A cephalometric analysis of Angle class II, Division 2 malocclusion in the mixed dentition Transactions of the British Society for the Study of Orthodontics, 46–50.

12.

Isaacson

K. G.

(1970) Overbite and facial height Transactions of the British Society for the Study of Orthodontics, 56, 48–58.

13.

James

G. A.

(1963) Cephalometric analysis of 100 Angle Class II Division 1 malocclusions with special references to the cranial base Transactions of the British Society for the Study of Orthodontics, 39–50.

14.

Marx

(1965) The circumoral muscles and the incisor relationship—an electromyographic study Transactions of the European Orthodontic Society, 187–202.

15.

Mills

J. R. E.

(1968) The stability of the lower labial segment Transactions of the British Society for the Study of Orthodontics, 54, 11–24.

16.

Mills

J. R. E.

(1970) The application and importance of cephalometry in orthodontic treatment The Orthodontist, 2, 32–47.

17.

Møller

(1966) The chewing apparatus. An electromyographic study of the action of the muscles of mastication and its correlation to facial morphology Acta Physiologica Scandinavica, 69; Supplement 280.

18.

Møller

(1970) Unpublished London University Lecture.

19.

Nicol

W. A.

(1954) The morphology of the lips in relation to the incisor teeth Transactions of the British Society for the Study of Orthodontics, 25–28.

20.

Ödegaard

(1970) Mandibular rotation studied with the aid of metal implants American Journal of Orthodontics, 58, 448–454.

21.

Popovitz

(1955) Cephalometric evaluation of vertical overbite in young adults Journal of the Canadian Dental Association, 21, 209–222.

22.

Prakash

and Margolis

H. I.

(1952) Dento-craniofacial relations in varying degrees of overbite American Journal of Orthodontics, 38, 657–673.

23.

Renfroe

E. W.

(1948) A study of the facial pattern associated with Class I, Class II Division 1 and Class II, Division 2 malocclusions Angle Orthodontist, 18, 12–15.

24.

Richardson

(1969) Skeletal factors in anterior open-bite and deep overbite American Journal of Orthodontics, 56, 114–127.

25.

Richardson

(1970) Dento-alveolar factors in anterior open bite and deep overbite Dental Practitioner, 21, 53–57.

26.

Ridley

D. R.

(1960) Some factors concerned with the reduction of excessive overbite in Angle's Class II Division 2 type of malocclusion Transactions of the British Society for the Study of Orthodontics, 118–140.

27.

Robertson

N. R. E.

and Hilton

(1965) Feature of the upper central incisor in Class II Division 2 Angle Orthodontist, 35, 51–53.

28.

Smeets

H. J. L.

(1962) A roentgenographic cephalometric study of the skeletal morphology of Angle's Class II Division 2 malocclusion in adult cases Transactions of the European Orthodontic Society, 247–259.

29.

Wylie

W. L.

(1946) The relationship between ramus height, dental height and overbite American Journal of Orthodontics, 32, 57–67.