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CALCIUM AND PHOSPHORUS
METABOLISM IN GROWTH
INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandentalac...
INTRODUCTION :-
Of all the minerals in our body, Calcium is present in the highest
amount. Our body’s need for calcium is ...
Calcium, combined with phosphate to form hydroxyapatite, is the
mineral portion of human and animal bones and teeth.
The m...
MINERAL ELEMENTS
Minerals elements are present in animal body supplied by the diet.
Minerals elements can be classified as...
2) Trace elements
Essential trace possibly essential non essential
elements elements elements
Iron, iodine,copper nickle,t...
CALCIUM :-
Calcium is essential for living organism, particularly in cell
physiology, where movement of the calcium ion Ca...
Calcium (Latin word calcis meaning "lime") was known as early as
the first century when the Ancient Romans prepared lime
a...
The National Osteoporosis Foundation says, "Calcium plays an
important role in building stronger, denser bones early in li...
Normal value-
In a normal young adult there about 1100 gm. of calcium present in
the body.
It forms about 1.5 % of total b...
Types of calcium :-
Calcium in plasma- is of two type.
- Ionized or diffusible calcium
- Nonionized or nondiffusible calci...
Calcium in bones-
Small quantity of readily exchangeable calcium:-
It helps to maintain the plasma calcium level as it is ...
DIETARY CALCIUM RECOMMENDATIONS
Group Age mg/day
Infants 0-6 months 400
6-12 months 600
Children 1-5 years 800
6-10 years ...
IMPORTANCE OF CALCIUM
Calcium along with phosphorus is essential for the formation and
development of bone and teeth.
Calc...
It is essential for muscular contraction.
It regulates the permeability of membrane.
It is required as a activator for act...
Absorption of Calcium:-
Calcium is taken in diet as – calcium phosphate,Carbonate,Tartrate and
oxalate.
Calcium actively a...
Calcium and phosphorus ratio of 1:2 (2:1 or 1:2 )is the most
convenient for the absorption of both.
www.indiandentalacadem...
PHOSPHORUS :-
The Phosphorus is the other mineral element which is essential for
the formation and development of bone and...
Phosphorus was discovered by German alchemist Hennig Brand in
1674 or 1675. Working in Hamburg.
Phosphorus is a component ...
 It present in the blood in the form of :-
-Inorganic phosphorus - 2-5 mg /100 ml
Organic phosphorus -14-29 mg /100 ml
-p...
Daily requirement :-
Infants - 240 – 400 mg
Children - 800 – 1200 mg
Adults -800 mg.
Absorption:-
- Moderate amount of fat...
Importance of Phosphorus :-
It is essential for the formation and development of bone and teeth
along with Calcium.
It is ...
It is required for the formation of Energy rich compounds like A.T.P.
It is required for the formation of Coenzyms such as...
CALCIUM AND PHOSPHORUS METABOLISM :-
Orthodontist and dentofacial orthopedists manipulate bone. The
biomechanical response...
As we know the Calcium along with phosphorus are the essential
major elements for the formation and development of bones a...
BONE METABOLISM :-
Orthodontics is bone manipulative therapy, and favorable calcium
and phosphorus metabolism is an import...
Maintenance of serum calcium levels at about 10 mg/dl is an
essential life support function.
Calcium is taken through diet...
REGULATION OF BLOOD CALCIUM LEVEL :-
All these process are finely regulated by three hormones.
1.Parathormone
2. Vitamin-D...
PARATHORMONE :-
Secreted by the chief cells of parathyroid glands.
It is protein in nature.
Action of Parathormone :-
prim...
Parathormone acts through cyclic AMP, which acts as second
messenger.
Effect on the bone :-
Responsible for Resorption of ...
Rapid flux of calcium from the bone fluid (occurs in seconds)
PTH---- Attached with receptors on the cell memb. of Osteob...
Short-term response by osteoclasts and osteoblasts (extends from
minutes to days)
In this phase the calcium resorption tak...
Long term control of bone turnover (over weeks to months).
Long term regulation has profound effects on the skeleton.
Biom...
EFFECT ON THE KIDNEYS :-
Increase the Reabsorption of Calcium from renal tubules along
with magnesium ions and hydrogen io...
EFFECT ON GASTROINTESTINAL TRACT :-
By the formation of 1,25 dihydroxy cholecalciferol from vit-D it
increase the Absorpti...
VITAMIN D – 3
Vit. D3 with parathyroid and cacitonin hormone
regulates the amount of Ca and phosphorous in human body.
Par...
ACTION OF 1,25 DIHYDROXY CHOLECALCIFEROL
Increase the absorption of calcium from the intestine.
Increase the synthesis of ...
It promotes interstitial Ca and phosphorous absorption
Vit.D3 increases the bone mass and thus reduces fractures in
osteop...
CALCITONIN :-
Peptide hormone, secreted by intra follicular or C- cells in the thyroid
gland. also called Thyrocalcitonin....
It decreases the Blood Calcium level and thereby counteracts the
action of Paratharmone.
It flows in bloodstream and attra...
It is used in the treatment of Hypercalcemia and Osteoporosis.
Effect on Kidney :-
It increase the excretion of calcium th...
Effect on intestine :-
It prevent the absorption of Calcium from intestine into the Blood.
Ortho consideration
It inhibit ...
www.indiandentalacademy.com
www.indiandentalacademy.com
Disease state:-
Abnormalities in Calcium and Phosphorus metabolism are mainly
associated with some Diseases.
-Hypercalcaem...
Calcium and Phosphorus metabolism in Growth:-
-The role of Calcium and Phosphorus metabolism is most effectively
started i...
BONE GROWTH :-
The embryo has a cartilaginous skeleton. the conversion of cartilage
into bones is called the ossification....
BONE :-
Bone or osseous tissue is a specialized rigid connective tissue that
form the skeleton.
it consist of special type...
FUNCTION OF BONE :-
Protective function --
protect soft tissue and vital organs of the body.
Mechanical function --
Suppor...
Metabolic function –
Bone play an important role in the metabolism and
Homeostasis of calcium and phosphorus in body.
Hemo...
COMPOSITION OF BONE :-
Bone matrix – bone matrix is composed of Protein fibers called
Collagen fibers. These fibers form a...
Bone salt – The crystalline salts present in bones are called “Hydroxy
apatites ‘which contain Calcium and Phosphate.
-Som...
BONE REMODELING :-
- Bone remolding is a process that includes bone resorption
followed by bone formation.
-Bone remodelin...
-Usually bone remolding takes place in group of cells called Basic
multicellular units (BMU)
-Significance of remodeling –...
In adults the remoldeing of bone is responsible for the maintence
of toughness of bone.This because of replacement of old ...
BONE FORMATION :-
The osteoblast activity or the process of bone formation
involves the synthesis of collagen and formatio...
First large quantity of calcium phosphate is deposited . Afterwards ,
the hydroxide and bicarbonate ions are gradually add...
Growth of maxilla
The Maxilla is carried out Downward and Forward growth.
www.indiandentalacademy.com
GROWTH OF MANDIBLE :-
 The Mandible is translated downwards and forwards and grows
upwards and backwards.
Chin moves down...
ROLE OF CALCIUM AND PHOSPHORUS METABOLISM IN
ORTHODONTIC TOOTH MOVEMENT.
Orthodontic tooth movement is a unique process wh...
www.indiandentalacademy.com
Bone resorption take place at the Pressure side.
Bone deposition take place at the Tension side.
Optimum orthodontic force...
Optimum force is equivalent to the capillary pulse pressure which
is 20-26 gm/sq.cm of root surface.
phases of tooth movem...
Journal of Bone and Mineral Metabolism, 2004
Masayoshi Kawakami and Teruko Takano-Yamamoto
Local injection of 1,25-dihydro...
1,25(OH)2D3 was injected locally, at the concentration of 10–10 M, once
every 3 days in the sub mucosal palatal area of th...
These findings suggest that local application of 1,25(OH)2D3 enhances
the reestablishment of supporting tissue, especially...
Source: AJO-DO on CD-ROM (Copyright © 1998 AJO-DO), Volume 1984 May (424 - 430): Root resorption and
tooth movement in ort...
The increased rate of tooth movement in the test animals can be
attributed to increased bone metabolism and decreased bone...
Increased tooth movement was also found to correlate directly with
increased bone turnover and decreased bone density.
Mor...
These findings suggest that tooth movement and root resorption
may be dependent upon bone density and calcium metabolism i...
Quintessence Int. 2001 May;32
Tyrovola JB, Spyropoulos MN
Effects of drugs and systemic factors on orthodontic treatment.
...
On the contrary, thyroid hormones and corticosteroids might be involved
in a more rapid orthodontic tooth movement during ...
Nonsteroidal anti-inflammatory drugs have also been shown to reduce
bone resorption.
Long-term administration of these dru...
CONCLUSION
Calcium and phosphorus are essential elements required for
maintaining the integrity of the skeletal system and...
www.indiandentalacademy.com
Thank you
For more details please visit
www.indiandentalacademy.com
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Calcium&phosphorus metabolisam in growth /certified fixed orthodontic courses by Indian dental academy

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Calcium&phosphorus metabolisam in growth /certified fixed orthodontic courses by Indian dental academy

  1. 1. CALCIUM AND PHOSPHORUS METABOLISM IN GROWTH INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  2. 2. INTRODUCTION :- Of all the minerals in our body, Calcium is present in the highest amount. Our body’s need for calcium is also the highest of any minerals or vitamins. The Phosphorus is the other mineral element which is essential for the formation and development of bone and teeth along with Calcium. www.indiandentalacademy.com
  3. 3. Calcium, combined with phosphate to form hydroxyapatite, is the mineral portion of human and animal bones and teeth. The mineral portion of some corals can also be transformed into hydroxylapatite. www.indiandentalacademy.com
  4. 4. MINERAL ELEMENTS Minerals elements are present in animal body supplied by the diet. Minerals elements can be classified as 1) Principal elements or Macronutrients There are total seven essential elements- calcium , magnesium, sodium, potassium, phosphorus, sulphur and chlorine. www.indiandentalacademy.com
  5. 5. 2) Trace elements Essential trace possibly essential non essential elements elements elements Iron, iodine,copper nickle,tin, silicon aluminium,boron zinc,manganese and lead and mercury Cobalt etc…. www.indiandentalacademy.com
  6. 6. CALCIUM :- Calcium is essential for living organism, particularly in cell physiology, where movement of the calcium ion Ca2+ into and out of the cytoplasm functions as a signal for many cellular processes. As a major material used in mineralization of bones and shells, calcium is the most abundantmetal by mass in many animals. www.indiandentalacademy.com
  7. 7. Calcium (Latin word calcis meaning "lime") was known as early as the first century when the Ancient Romans prepared lime as calcium oxide. Calcium is an important component of a healthy diet and a mineral necessary for life.. www.indiandentalacademy.com
  8. 8. The National Osteoporosis Foundation says, "Calcium plays an important role in building stronger, denser bones early in life and keeping bones strong and healthy later in life.“ Approximately ninety-nine percent of the body's calcium is stored in the bones and teeth www.indiandentalacademy.com
  9. 9. Normal value- In a normal young adult there about 1100 gm. of calcium present in the body. It forms about 1.5 % of total body weight. 99 % of calcium is present in the bone and the rest present in plasma. Normal blood calcium level is 9.4 mg % /100 ml. www.indiandentalacademy.com
  10. 10. Types of calcium :- Calcium in plasma- is of two type. - Ionized or diffusible calcium - Nonionized or nondiffusible calcium Ionized form :- Is found freely in plasma. essential for regulate vital function like neuronal activity, muscle contraction,cardic activity and blood coagulation.. www.indiandentalacademy.com
  11. 11. Calcium in bones- Small quantity of readily exchangeable calcium:- It helps to maintain the plasma calcium level as it is removed from the bone. Large quantity of stable calcium:- It helps in bone remolding since it is constantly removed and deposited in bone. Source of calcium:- Rich source – Milk and Cheese good source- Egg yolk,Nuts,Fish,Beans… www.indiandentalacademy.com
  12. 12. DIETARY CALCIUM RECOMMENDATIONS Group Age mg/day Infants 0-6 months 400 6-12 months 600 Children 1-5 years 800 6-10 years 800-1200 Adolescents and young adults 11-24 years 1200-1500 Men 25-65 years 1000 Women 25-50 years 1000 pregnant or lactating 1200-1500 Post menopausal Receiving estrogen replacement therapy 1000 Not receiving 1500 Men and women >65 years 1500 www.indiandentalacademy.com
  13. 13. IMPORTANCE OF CALCIUM Calcium along with phosphorus is essential for the formation and development of bone and teeth. Calcium is also required in blood coagulation process. Calcium also regulate the neuronal activity. www.indiandentalacademy.com
  14. 14. It is essential for muscular contraction. It regulates the permeability of membrane. It is required as a activator for activate several enzymes like ATPasse,Proteolytic enzymes. www.indiandentalacademy.com
  15. 15. Absorption of Calcium:- Calcium is taken in diet as – calcium phosphate,Carbonate,Tartrate and oxalate. Calcium actively absorbed in upper intestine and regulated by 1,25 Dihydroxycholicalciferol(a metabolite of vit-D),which is produced in liver and kidney in response to decrease plasma concentration. www.indiandentalacademy.com
  16. 16. Calcium and phosphorus ratio of 1:2 (2:1 or 1:2 )is the most convenient for the absorption of both. www.indiandentalacademy.com
  17. 17. PHOSPHORUS :- The Phosphorus is the other mineral element which is essential for the formation and development of bone and teeth along with Calcium. The crystalline salts present in bones are called “Hydroxy apatites ‘which contain Calcium and Phosphate. www.indiandentalacademy.com
  18. 18. Phosphorus was discovered by German alchemist Hennig Brand in 1674 or 1675. Working in Hamburg. Phosphorus is a component of DNA, RNA, ATP, and also the phospholipids which form all cell membranes. It is thus an essential element for all living cells www.indiandentalacademy.com
  19. 19.  It present in the blood in the form of :- -Inorganic phosphorus - 2-5 mg /100 ml Organic phosphorus -14-29 mg /100 ml -phospholipids - 8-18 /100ml Source :- Milk,cheese,egg-yolk,meat,fish…. www.indiandentalacademy.com
  20. 20. Daily requirement :- Infants - 240 – 400 mg Children - 800 – 1200 mg Adults -800 mg. Absorption:- - Moderate amount of fats or acid increase absorption. - high calcium decrease the absorption. www.indiandentalacademy.com
  21. 21. Importance of Phosphorus :- It is essential for the formation and development of bone and teeth along with Calcium. It is required for the formation of Phospholipids,Nucelic acids, and Phosphoproteins. It is required for the formation of Organic phosphates. www.indiandentalacademy.com
  22. 22. It is required for the formation of Energy rich compounds like A.T.P. It is required for the formation of Coenzyms such as NADP,ADP,AMP. It is required for the Absorption of Glucose by phosphorylation. www.indiandentalacademy.com
  23. 23. CALCIUM AND PHOSPHORUS METABOLISM :- Orthodontist and dentofacial orthopedists manipulate bone. The biomechanical response to altered function and applied loads depends on the metabolic status of the patients. Bone metabolism is an important aspect of clinical medicine that is directly applicable to Orthodontics and Orthopedics. Orthodontics is bone manipulative therapy and favourable calcium and phosphorus metabolism is an important consideration. www.indiandentalacademy.com
  24. 24. As we know the Calcium along with phosphorus are the essential major elements for the formation and development of bones and teeth, so we can explain the metabolism of Calcium and Phosphorus as Bone metabolism. www.indiandentalacademy.com
  25. 25. BONE METABOLISM :- Orthodontics is bone manipulative therapy, and favorable calcium and phosphorus metabolism is an important role. Calcium homeostasis is the process by which mineral equilibrium is maintained. www.indiandentalacademy.com
  26. 26. Maintenance of serum calcium levels at about 10 mg/dl is an essential life support function. Calcium is taken through dietary sources.It is absorbed from the G.I.Tract in to Blood and distributed through out the body. www.indiandentalacademy.com
  27. 27. REGULATION OF BLOOD CALCIUM LEVEL :- All these process are finely regulated by three hormones. 1.Parathormone 2. Vitamin-D 3.Calcitonin www.indiandentalacademy.com
  28. 28. PARATHORMONE :- Secreted by the chief cells of parathyroid glands. It is protein in nature. Action of Parathormone :- primary function is to maintain the blood calcium level. It is regulated by the Calcium ion concentration in the Blood. www.indiandentalacademy.com
  29. 29. Parathormone acts through cyclic AMP, which acts as second messenger. Effect on the bone :- Responsible for Resorption of bone or calcium . It occurs in two phase. www.indiandentalacademy.com
  30. 30. Rapid flux of calcium from the bone fluid (occurs in seconds) PTH---- Attached with receptors on the cell memb. of Osteoblast and Osteocytes. Hormone –Receptors complex –increase permeability of the cell memb. For calcium ions This increase the calcium pump mechanism allowing calcium ions to move from these cells to plasma. www.indiandentalacademy.com
  31. 31. Short-term response by osteoclasts and osteoblasts (extends from minutes to days) In this phase the calcium resorption take place by the activation of osteoclast. Osteoclast----released Proteolytic enzyme ----Digest or Dissolve the organic matrix ----- Calcium ions released and slowly move into Plasma. www.indiandentalacademy.com
  32. 32. Long term control of bone turnover (over weeks to months). Long term regulation has profound effects on the skeleton. Biomechanical factors, noncalcific hormones, and the metabolite mechanisms dictate mass, geometric distribution and the mean age of the bone. www.indiandentalacademy.com
  33. 33. EFFECT ON THE KIDNEYS :- Increase the Reabsorption of Calcium from renal tubules along with magnesium ions and hydrogen ions At the same time it also increases the excretion of Phosphates from renal tubules. www.indiandentalacademy.com
  34. 34. EFFECT ON GASTROINTESTINAL TRACT :- By the formation of 1,25 dihydroxy cholecalciferol from vit-D it increase the Absorption of Calcium. Vit- D is essentiol for that. Ortho consideration It increases the tooth movement and consequently influence orthodontic treatment. www.indiandentalacademy.com
  35. 35. VITAMIN D – 3 Vit. D3 with parathyroid and cacitonin hormone regulates the amount of Ca and phosphorous in human body. Parathyroid hormone convert the vit-D in its active metabolite which is known as 1,25 Dihydroxy cholecalciferol . www.indiandentalacademy.com
  36. 36. ACTION OF 1,25 DIHYDROXY CHOLECALCIFEROL Increase the absorption of calcium from the intestine. Increase the synthesis of calcium induced ATP in the intestinal epithelium. increase the synthesis of alkaline phophatase in the intestinal epithelium. www.indiandentalacademy.com
  37. 37. It promotes interstitial Ca and phosphorous absorption Vit.D3 increases the bone mass and thus reduces fractures in osteoporosis. Ortho consideration It can be assumed that they can inhibit tooth movement. www.indiandentalacademy.com
  38. 38. CALCITONIN :- Peptide hormone, secreted by intra follicular or C- cells in the thyroid gland. also called Thyrocalcitonin. Actions of Calcitonin :- Effect on Bone :- It increase the deposition of calcium on bones and also suppress the activity of osteoclasts. Even it inhibits the development of new Osteoclasts. www.indiandentalacademy.com
  39. 39. It decreases the Blood Calcium level and thereby counteracts the action of Paratharmone. It flows in bloodstream and attracts Ca to bone, thus reducing Serum calcium It reduces bone resorption by reducing the no. of osteoclasts. www.indiandentalacademy.com
  40. 40. It is used in the treatment of Hypercalcemia and Osteoporosis. Effect on Kidney :- It increase the excretion of calcium through urine, by inhibiting the reabsorption of calcium from the renal tubules. www.indiandentalacademy.com
  41. 41. Effect on intestine :- It prevent the absorption of Calcium from intestine into the Blood. Ortho consideration It inhibit tooth movement and consequently delays orthodontic treatment www.indiandentalacademy.com
  42. 42. www.indiandentalacademy.com
  43. 43. www.indiandentalacademy.com
  44. 44. Disease state:- Abnormalities in Calcium and Phosphorus metabolism are mainly associated with some Diseases. -Hypercalcaemia -Hypocalcaemia -Rickets -Osteoporosis www.indiandentalacademy.com
  45. 45. Calcium and Phosphorus metabolism in Growth:- -The role of Calcium and Phosphorus metabolism is most effectively started in post natal period.. - Bone remodeling and Bone resorption (Bone metabolism ) procedure occurs continuously throughout life.. www.indiandentalacademy.com
  46. 46. BONE GROWTH :- The embryo has a cartilaginous skeleton. the conversion of cartilage into bones is called the ossification. At the time of birth skeleton consist of 50 % cartilage and 50 % bone. www.indiandentalacademy.com
  47. 47. BONE :- Bone or osseous tissue is a specialized rigid connective tissue that form the skeleton. it consist of special type of cells and tough intercellular matrix of ground substance. through out life the bone is renewed by the process of bone formation and bone resorption. www.indiandentalacademy.com
  48. 48. FUNCTION OF BONE :- Protective function -- protect soft tissue and vital organs of the body. Mechanical function -- Support the body and their attachment to the muscles and tendon. www.indiandentalacademy.com
  49. 49. Metabolic function – Bone play an important role in the metabolism and Homeostasis of calcium and phosphorus in body. Hemopoietic function – Red bone marrow is the site of production of Blood. www.indiandentalacademy.com
  50. 50. COMPOSITION OF BONE :- Bone matrix – bone matrix is composed of Protein fibers called Collagen fibers. These fibers form about 90% of bone. - matrix is embedded in the gelatinous ground substance ,which is formed by extracellular fluid and proteoglycans. www.indiandentalacademy.com
  51. 51. Bone salt – The crystalline salts present in bones are called “Hydroxy apatites ‘which contain Calcium and Phosphate. -Some other salts present like sodium , potassium magnesium. - The salt of the bone strengthen the bone matrix. www.indiandentalacademy.com
  52. 52. BONE REMODELING :- - Bone remolding is a process that includes bone resorption followed by bone formation. -Bone remodeling occurs continuously throughout life. www.indiandentalacademy.com
  53. 53. -Usually bone remolding takes place in group of cells called Basic multicellular units (BMU) -Significance of remodeling – in children the shape of bone is re altered in relation to growth of the body. www.indiandentalacademy.com
  54. 54. In adults the remoldeing of bone is responsible for the maintence of toughness of bone.This because of replacement of old matrix by new matrix. Bone resorption :- It is the process that involves the destruction of entire Bone matrix and Removal of Calcium. The osteoclast responsible for bone resorption. www.indiandentalacademy.com
  55. 55. BONE FORMATION :- The osteoblast activity or the process of bone formation involves the synthesis of collagen and formation of matrix that is mineralized. Mineralization :- The mineralization starts about 10 to 12 days after the formation of osteoid. www.indiandentalacademy.com
  56. 56. First large quantity of calcium phosphate is deposited . Afterwards , the hydroxide and bicarbonate ions are gradually added causing the formation of hydroxyapatite crystals. The process is increased by the enzyme Alkaline phosphatase secreted by osteoblast. www.indiandentalacademy.com
  57. 57. Growth of maxilla The Maxilla is carried out Downward and Forward growth. www.indiandentalacademy.com
  58. 58. GROWTH OF MANDIBLE :-  The Mandible is translated downwards and forwards and grows upwards and backwards. Chin moves downwards Mandible grows upwards And forwards. and backwards www.indiandentalacademy.com
  59. 59. ROLE OF CALCIUM AND PHOSPHORUS METABOLISM IN ORTHODONTIC TOOTH MOVEMENT. Orthodontic tooth movement is a unique process where a solid object(tooth)is made to move through a solid medium (bone) When force is applied on a tooth to bring about orthodontic movement , it result in formation of -Area of pressure in the direction of the tooth movement. -Area tension form in the opposite direction. www.indiandentalacademy.com
  60. 60. www.indiandentalacademy.com
  61. 61. Bone resorption take place at the Pressure side. Bone deposition take place at the Tension side. Optimum orthodontic force :- Is one which moves teeth most rapidly in the desired direction, with the least possible damage to tissue and with minimum patient discomfort. www.indiandentalacademy.com
  62. 62. Optimum force is equivalent to the capillary pulse pressure which is 20-26 gm/sq.cm of root surface. phases of tooth movement. 1. Initial phase 2. Lag phase 3. Post lag phase www.indiandentalacademy.com
  63. 63. Journal of Bone and Mineral Metabolism, 2004 Masayoshi Kawakami and Teruko Takano-Yamamoto Local injection of 1,25-dihydroxyvitamin D3 enhanced bone formation for tooth stabilization after experimental tooth movement in rats The present investigation evaluated the effect of 1,25-dihydroxyvitamin D3 (1,25(OH)2D3) on alveolar bone formation during tooth movement in rats Orthodontic elastics were inserted between the maxillary first and second molars on bilateral sides in male rats www.indiandentalacademy.com
  64. 64. 1,25(OH)2D3 was injected locally, at the concentration of 10–10 M, once every 3 days in the sub mucosal palatal area of the root bifurcation of the molar on the right side. Histomorphometric analysis revealed that tooth movement without application of 1,25(OH)2D3 decreased the mineral appositional rate (MAR) on the compression area at 7 days. Repeated injections of 1,25(OH)2D3 in the orthodontically treated animals distinctly stimulated alveolar bone formation on the mesial side at 14 days. There was a significant increase in MAR associated with elevated osteoblast surface value on the tension surface. www.indiandentalacademy.com
  65. 65. These findings suggest that local application of 1,25(OH)2D3 enhances the reestablishment of supporting tissue, especially alveolar bone of teeth, after orthodontic treatment. www.indiandentalacademy.com
  66. 66. Source: AJO-DO on CD-ROM (Copyright © 1998 AJO-DO), Volume 1984 May (424 - 430): Root resorption and tooth movement in orthodontically treated, calcium-deficient, and lactating rats - Goldie and King A study had been done by Goldie and King on , Root resorption and tooth movement in orthodontically treated, calcium-deficient, and lactating rats. A 60-gm orthodontic force designed to tip maxillary molars mesially was applied for varying times. Since the appliance force was similar for both groups. www.indiandentalacademy.com
  67. 67. The increased rate of tooth movement in the test animals can be attributed to increased bone metabolism and decreased bone density. This study confirms earlier findings that lactation, coupled with a calcium-deficient diet, will produce decreased bone density through secondary hyperparathyroidism. www.indiandentalacademy.com
  68. 68. Increased tooth movement was also found to correlate directly with increased bone turnover and decreased bone density. Morphometric data indicated that animals stressed with lactation and dietary calcium deficiency had significantly less root resorption in the time course of this experiment. . www.indiandentalacademy.com
  69. 69. These findings suggest that tooth movement and root resorption may be dependent upon bone density and calcium metabolism in alveolar bone. www.indiandentalacademy.com
  70. 70. Quintessence Int. 2001 May;32 Tyrovola JB, Spyropoulos MN Effects of drugs and systemic factors on orthodontic treatment. Orthodontic tooth movement and bone remodeling activity are dependent on systemic factors such as nutritional factors, metabolic bone diseases, age, and use of drugs Systemic hormones such as estrogen, androgen, and calcitonin are associated with an increase in bone mineral content, bone mass, and a decrease in the rate of bone resorption. Consequently, they could delay orthodontic tooth movement www.indiandentalacademy.com
  71. 71. On the contrary, thyroid hormones and corticosteroids might be involved in a more rapid orthodontic tooth movement during orthodontic therapy and have a less stable orthodontic result. Drugs such as bisphosphonates, vitamin D metabolites, and fluorides can probably cause a reduction of tooth movement after the orthodontic force is applied. www.indiandentalacademy.com
  72. 72. Nonsteroidal anti-inflammatory drugs have also been shown to reduce bone resorption. Long-term administration of these drugs may therefore delay the necessary bone response to respective tooth-borne pressure and should not be administered for long periods of time to patients undergoing orthodontic tooth movement. The use of the above drugs should be considered by every dentist in evaluating the treatment time and in planning treatment when tooth movement is attempted. www.indiandentalacademy.com
  73. 73. CONCLUSION Calcium and phosphorus are essential elements required for maintaining the integrity of the skeletal system and they assist in mineral metabolism as well. Their importance in orthodontics can never be denied. www.indiandentalacademy.com
  74. 74. www.indiandentalacademy.com Thank you For more details please visit www.indiandentalacademy.com

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