Incisor development, wear and loss in sheep and their impact on ewe production, longevity and economics: A review

Small Ruminant Research

Volumn 95, Issue 2-3, 2011, Pages 79-87

  McGregor, B A ^a,b  

^a DEAKIN UNIVERSITY   (Australia)

^b DEPARTMENT OF PRIMARY INDUSTRIES   (Australia)

Author keywords

Broken mouth; Cast for age; Culling; Genetics; Grazing; Management; Nutrition; Prevention; Welfare

Indexed keywords

ANIMALIA; OVIS ARIES;

EID: 79151477899     PISSN: 09214488     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.smallrumres.2010.11.012     Document Type: Review

References (81)

1. Aitchinson G.U., Spence J.A. Dental disease in hill sheep: an abattoir survey. J. Comp. Pathol. 1984, 94:285-300.
2. Aitken W.M., Meyer H.H. Tooth eruption patterns in New Zealand sheep breeds. Proc. N.Z. Soc. Anim. Prod. 1982, 42:59-60.
3. Allden W.G. Undernutrition of the Merino sheep and its sequelae III. The effect on lifetime productivity of growth restrictions imposed at two stages of early post-natal life in a Mediterranean environment. Aust. J. Agric. Res. 1968, 19:981-996.
4. Arnold G.W., Bush I.G. The effects of stocking rate and grazing management on fat lamb production. Proc. Aust. Soc. Anim. Prod. 1962, 4:121-129.
5. Arnold G.W., McManus W.R., Bush I.G. Studies in the wool production of grazing sheep. 5. Observations on teeth wear and carry over effects. Aust. J. Exp. Agric. Anim. Husb. 1966, 6:101-107.
6. Arrowsmith S.P., Steenkamp J.D.G., le Roux P. The influence of breed and plane of nutrition on the chronology of teeth eruption in sheep. S. Afr. J. Anim. Sci. 1974, 4:127-130.
7. Barber D.M.L., Waterhouse A. An evaluation of cutting of incisor teeth of ewes in an attempt to control premature tooth loss. Vet. Rec. 1988, 123:598-599.
8. Barnicoat C.R. Wear in sheep's teeth. N.Z. J. Sci. Technol. 1957, 38:583-632.
9. Bath J.G., Hogg R.J., Edwards M.S.H. Merino wethers v. crossbred ewes and lambs. Vic. J. Agric. 1965, 63:251-258.
10. Belschner H.G. Sheep Management and Diseases 1976, Angus and Robertson, Melbourne.
11. Benzie D., Cresswell E. Studies of the dentition of sheep II. Radiographic illustrations of stages in the development and shedding of the permanent dentition of Scottish Blackface sheep. Res. Vet. Sci. 1962, 3:231-235.
12. Benzie D., Boyne A.W., Dalgarno A.C., Duckworth J., Hill R., Walker D.M. Studies of the skeleton of the sheep 1. The effect of different levels of dietary calcium during pregnancy and lactation on individual bones. J. Agric. Sci. Camb. 1955, 46:425-439.
13. Benzie D., Boyne A.W., Dalgarno A.C., Duckworth J., Hill R., Walker D.M. Studies of the skeleton of the sheep II. The relationship between calcium intake and resorption and repair of the skeleton in pregnancy and lactation. J. Agric. Sci. Camb. 1957, 49:175-186.
14. Benzie D., Boyne A.W., Dalgarno A.C., Duckworth J., Hill R. Studies of the skeleton of the sheep III. The relationship between phosphorus intake and resorption and repair of the skeleton in pregnancy and lactation. J. Agric. Sci. Camb. 1959, 52:7-12.
15. Benzie D., Boyne A.W., Dalgarno A.C., Duckworth J., Hill R., Walker D.M. Studies of the skeleton of the sheep IV. The effect and interactions of dietary supplements of calcium, phosphorus, cod-liver oil and energy, as starch, on the skeleton of growing Blackface wethers. J. Agric. Sci. Camb. 1960, 54:202-220.
16. Bishop A.H., Birrell H.A. Effect of stocking rate, fodder conservation and grazing management on the performance of wether sheep in south-west Victoria. 1. Wool production. Aust. J. Exp. Agric. 1975, 15:173-182.
17. Briggs H.M. Some Effects of Breeding Ewe Lambs 1936, North Dakota Agricultural Experiment Station Bulletin No. 285, Fargo, North Dakota.
18. Cannon D.J., Napier K., Hanrahan P.D. Some sheep-wheat men could reduce costs. Vic. J. Agric. 1971, 69:154-156.
19. Caple I.W., Heath J.A., Grant I.M. Calcium requirements of sheep during pregnancy, lactation and growth. Proc. Nutr. Soc. Aust. 1988, 13:33-40.
20. Cocquyt G., Driessen B., Simoens R. Variability in the eruption of the permanent incisor teeth in sheep. Vet. Rec. 2005, 157:619-623.
21. Coop I.E., Abrahamson M. Effect of teeth condition on intake of grazing sheep. N.Z. J. Exp. Agric. 1973, 1:58-64.
22. Cutress T.W., Healy W.B. Wear of sheep's teeth. II. Effects of pasture juices on dentine. N.Z. J. Agric. Res. 1965, 8:753-762.
23. Denholm L.J., Vizard A.L. Periodontal disease and premature incisor tooth loss (broken-mouth) in Australian sheep: is tooth grinding an effective, acceptable solution?. Wool Technol. Sheep Breed. 1986, 34:113-120.
24. Denholm L.J., Vizard A.L. Trimming the incisor teeth of sheep - another view. Vet. Rec. 1986, 119:182-184.
25. Dove H., Milne J.A. An evaluation of the effects of incisor dentition and of age on the performance of lactating ewes and their lambs. Anim. Prod. 1991, 53:183-190.
26. Drake F.R., Elliott N.M. Rates of stocking investigated at Bengworden. Vic. J. Agric 1963, 61:553-558.
27. Duckworth J., Benzie D., Cresswell E., Hill R., Boyne A.W. Studies of the dentition of sheep I. Clinical observations from investigations into the shedding of permanent incisor teeth by hill sheep. Res. Vet. Sci. 1962, 3:1-17.
28. Duckworth J., Benzie D., Cresswell E., Hill R., Boyne A.W. Studies of the dentition of sheep III. A study of the effects of vitamin D and phosphorus deficiencies in the young animal on the productivity, dentition and skeleton of Scottish Blackface ewes. Res. Vet. Sci. 1962, 3:408-415.
29. Every D., Tunnicliffe G.A., Every R.G. Tooth-sharpening behaviour (thegosis) and other causes of wear on sheep teeth in relation to mastication and grazing mechanisms. J. R. Soc. N.Z. 1998, 28:169-184.
30. Field A.C., Sykes A.R., Gunn R.G. Effects of age and state of incisor dentition on faecal output of dry matter and on faecal and urinary output of nitrogen and minerals, of sheep grazing hill pastures. J. Agric. Sci. 1974, 83:151-160.
31. Franklin, M.C., 1950. The influence of diet on dental development in the sheep. CSIRO Bulletin No. 252. CSIRO Melbourne.
32. Frisken K.W., Laws A.J., Tagg J.R., Orr M.B. Environmental-influences on the progression of clinical and microbiological parameters of sheep periodontal-disease. Res. Vet. Sci. 1989, 46:147-152.
33. Granger W. Selection of breeding ewes: dependence of practicable degree of selection of young ewes upon vital statistics. Aust. Vet. J. 1944, 20:253-260.
34. Gunn R.G. The effects of calcium and phosphorus supplementation on the performance of Scottish Blackface hill ewes, with particular reference to the premature loss of permanent incisor teeth. J. Agric. Sci. Camb. 1969, 72:371-378.
35. Healy W.B., Ludwig T.G. Wear of sheep's teeth. 1. The role of ingested soil. N.Z. J. Agric. Res. 1965, 8:737-752.
36. Healy W.B., Cutress T.W., Michie C. Wear of sheep's teeth. IV. Reduction of soil ingestion and tooth wear by supplementary feeding. N.Z. J. Agric. Res. 1967, 10:201-209.
37. Herrtage M.E., Sauders R.W., Terlecki S. Physical examination of cull ewes at point of slaughter. Vet. Rec. 1974, 95:257-260.
38. Ho L., Field R.A., Russell W.C., Riley M.L., Ercanbrack S.K., Williams F.L. Influence of gender, breed and age on maturity characteristics of sheep. J. Anim. Sci. 1989, 67:2460-2470.
39. Hodge R.W., Pearce G.R., Tribe D.E. Calcium requirements of the young lamb. I. Effects of different intakes of dietary calcium on liveweight gain, bone development, and blood serum calcium levels. Aust. J. Agric. Res. 1973, 24:229-236.
40. Hongo A., Zhang J., Toukura Y., Akimoto M. Changes in incisor dentition of sheep influence biting force. Grass Forage Sci. 2004, 59:293-297.
41. Kwantes L.J. Aging of Omani small ruminants by permanent incisor growth. Trop. Anim. Health Prod. 1994, 26:210-212.
42. Langlands J.P., Donald G.E., Paull D.R. Effects of different stocking intensities in early life on the productivity of Merino ewes grazed as adults at two stocking rates. 3. Survival of ewes and their lambs, and the implications for flock productivity. Aust. J. Exp. Agric. Anim. Husb. 1984, 24:57-65.
43. Laws A.J., Aitken W.M., Spears G.F.S. Dental configuration among different breeds of sheep. Res. Vet. Sci. 1988, 45:317-323.
44. Leech F.B., Sellers K.C. A second survey of losses associated with pregnancy and parturition in Yorkshire sheep. J. Agric. Sci. 1959, 52:117-124.
45. Ludwig T.G., Healy W.B., Cutress T.W. Wear of sheep's teeth. 3. Seasonal variation in wear and ingested soil. N.Z. J. Agric. Res. 1966, 9:157-164.
46. Markham J.H.A., Stewart W.L. Dental conservation in sheep. Vet. Rec. 1962, 74:971-978.
47. Markham J.H.A., Stewart W.L. B. Dent. J. 1962, 112:327. (as cited by Markham and Stewart (1962a)).
48. Mascall L. The Gouernment of Cattel 1662, John Stafford & WG, London, (p. 234 as cited by Purser et al., 1982).
49. McHugh J.F., Edwards M.S.H. Lamb loss investigations at Rutherglen Research Station. Vic. J. Agric. 1958, 56:425-438.
50. McRoberts M.R., Hill R., Dalgarno A.C. The effects of diets deficient in phosphorus, phosphorus and vitamin D, or calcium, on the skeleton and teeth of the growing sheep I. The mineral status of the skeleton and clinical appearance of the teeth. J. Agric. Sci. Camb. 1965, 65:1-10.
51. McRoberts M.R., Hill R., Dalgarno A.C. The effects of diets deficient in phosphorus, phosphorus and vitamin D, or calcium, on the skeleton and teeth of the growing sheep II. Malocclusion of the teeth. J. Agric. Sci. Camb. 1965, 65:11-14.
52. Meyer H.H., Aitken W.M., Smeaton J.E. Inheritance of wear rate in the teeth of sheep. Proc. N.Z. Soc. Anim. Prod. 1983, 43:189-191.
53. Newton J.E., Jackson C. A note on the effect of dentition and age in sheep on the intake of herbage. Anim. Prod. 1983, 37:133-136.
54. Newton J.E., Jackson C. The effect of age on tooth loss and the performance of Masham ewes. Anim. Prod. 1984, 39:421-425.
55. Nolan T., Black W.J.M. Effect of stocking rate on tooth wear in ewes. Ir. J. Agric. Res. 1970, 9:187-196.
56. Orr M. A study of the effects of large worm burdens in lambs on their incisor dentition as adults. N.Z. Vet. J. 1989, 37:38.
57. Orr M.B., Mackey R.D. A pilot study of dietary lime supplementation and periodontal disease in ewes in Southland. N.Z. Vet. J. 1991, 39:111-112.
58. Orr M.B., Suckling G. Broken incisors - a cause of hogget illthrift. N.Z. Vet. J. 1985, 33:104.
59. Orr M.B., Christiansen K.H., Kissling R.C. A survey of excessively worn incisors and periodontal disease in sheep in Dunedin City, Silverpeaks, Bruce and Clutha Counties. N.Z. Vet. J. 1986, 34:111-115.
60. Orr M.B., Mackey R.D., McNally K. A pilot study of the effects of mechanical shortening of ewes' incisors (bite correction) on body weight and the development of periodontal disease. N.Z. Vet. J. 1991, 39:108-110.
61. Pearse E.H. Sheep, Farm and Station Management 1932, Pastoral Review Pty. Ltd., Melbourne. 3th ed.
62. Pearse E.H. Sheep and Property Management 1969, Pastoral Review Pty. Ltd., Melbourne. 8th ed. P.S. Colclough, G. Fethers (Eds.).
63. Peirce, A.W., 1938. Observations on the toxicity of fluorine for sheep. Division of Animal Health and Nutrition Bulletin 121. CSIRO, Melbourne.
64. Ponzoni R.W., Azzarini M., Walker S.K. Production in mature Corriedale ewes first mated at 7-11 or 18 months of age. Anim. Prod. 1979, 29:385-391.
65. Porter W.L., Scott R.S., Manktelow B.W. The occurrence of paradontal disease in sheep in relation to superphosphate topdressing, stocking rate and other related factors. N.Z. Vet. J. 1970, 18:21-27.
66. Purser A.F., Wiener G., West D.M. Causes of variation in dental characters of Scottish Blackface sheep in a hill flock, and relations to ewe performance. J. Agric. Sci. Camb. 1982, 99:287-294.
67. Radostits O.M., Gay C.C., Hinchcliff K.W., Constable P.D. Veterinary Medicine 2007, Saunders, London. 10th ed.
68. Ridler A.L., West D.M. Examination of teeth in sheep health management. Small Rumin. Res. 2010, 92:92-95.
69. SCA, 1990. Feeding Standards for Australian Livestock: Ruminants. Standing Committee on Agriculture. CSIRO, East Melbourne, 266 pp.
70. Spence J.A., Aitchinson G.U. Early tooth loss in sheep: a review. Vet. Ann. 1985, 25:125-133.
71. Spence J.A., Sykes A.R., Atkinson P.J., Aitchison G.U. Skeletal and blood biochemical characteristics of sheep during growth and breeding: a comparison of flocks with and without broken mouth. J. Comp. Pathol. 1985, 95:505-524.
72. Spence J.A., Hooper G.E., Austin A.R. Trimming incisor teeth of sheep. Vet. Rec. 1986, 118:617.
73. Suckling G.W., Cutress T.W., Healy W.B., Mattingley J. The effects of liming a highly leached soil on periodontal health, serum composition, and body weight of sheep. N.Z. J. Agric. Res. 1974, 17:311-316.
74. Sykes A.R., Field A.C., Gunn R.G. Effects of age and state of incisor dentition on body composition and lamb production of sheep grazing hill pastures. J. Agric. Sci. 1974, 83:135-143.
75. Sykes A.R., Field A.C., Gunn R.G. Effects of age and state of incisor dentition on the chemical composition of the skeleton of sheep grazing hill pastures. J. Agric. Sci. 1974, 83:145-150.
76. Tagle E.C., Helman M.B. Consideraciones sobre la edad del ovino. Anim. Breed. Abstr. 1947, 15:34-35.
77. Taylor St.C.S., Murray J.I., Illius A.W. Relative growth of incisor arcade breadth and eating rate in cattle and sheep. Anim. Prod. 1987, 45:453-458.
78. Underwood E.J., Suttle N.F. The Mineral Nutrition of Livestock 1999, CABI Publishing, Wallingford, UK. 3rd ed.
79. Weinreb M.M., Sharav Y. Tooth development in sheep. Am. J. Vet. Res. 1964, 25:891-908.
80. West D.M. Dental disease of sheep. N.Z. Vet. J. 2002, 50:102-104.
81. Williams, A., 1993. Evaluation of tooth grinding as a method for improving economic performance in flocks with premature incisor tooth loss (" broken mouth"). Final Report Project DAV 5 Wool Research and Development Corporation. Victorian Department of Agriculture, Werribee.