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With the loss of teeth, the chewing force also decreases due to the fact that the prosthesis is not balanced. Half of patients with movable prostheses say that they chew better when they do not have prostheses.

There is a very significant difference between the maximum biting forces of patients who use full prostheses and patients with full natural teeth. Decapitation is a very important difference between patients who use full prostheses and patients who have full natural teeth.

In a person with natural teeth, the average force on the first molar was measured between 150 and 250 psi. Patients who are clenching or gnashing teeth can exert biting forces approaching 1000 psi. In a toothless patient, the maximum biting force decreases to levels of less than 50 psi. As the duration of toothlessness of patients increases, the amount of force they can usually apply also decreases. in patients who have been using a full prosthesis for more than 15 years, the maximum bite force may decrease to 5.6 psi.


Along with tooth loss, there is also a decrease in chewing efficiency due to a decrease in the chewing force that can be applied and the prosthesis is not balanced. During the same 15-year time december, 90 percent of the nutrients chewed with natural teeth can be passed through the standard sieve No. 12, while in patients using full dentures, this amount drops to 58 percent. A 10 percent decrease in the force that can be applied and a 40 percent decrease in the effectiveness of chewing affect the patient’s ability to chew. 29 percent of patients using prostheses can only eat soft or crushed foods, 50 percent avoid many foods, and 17 percent can chew more comfortably when they are not using their prostheses. in a study conducted with 367 prosthetic users, poor chewing performance was reported in 47 percent of patients. In this group, especially women who take less vegetables, fruits, and vitamin A than are needed stand out. These patients were taking significantly more medications than patients with higher chewing activity.

Another 25 percent were on medication for stomach and intestinal disorders.

In patients with insufficient chewing activity, less intake of foods with a high content of fiber promotes the occurrence of stomach and intestinal disorders. In transfer, a complex and rough bite can weaken the functions of proper digestion and food intake.

There are many reports in literature that insufficient teeth cause poor chewing and swallowing performance, which in turn leads to diseases, deficiencies and a shortening in the expected life expectancy.


The biting force decreases from 200 psi to 50 psi

the biting force decreases to 6 psi in those who have used movable prostheses for 15 years

The effectiveness of chewing is reduced

Further use of drugs is required to treat stomach and intestinal disorders

Life expectancy may be shortened

Food options are restricted

Healthy food intake is reduced.

Edentulous patients fruits, vegetables and other fibrous foods, chewing on the effectiveness of a study they reported that about 10 percent of individuals having difficulties in chewing these foods, and in these individuals, for individuals with natural teeth, in plasma ascorbate and plasma retinol was found to lower levels of a blood test. These two blood tests have been linked to increased skin and vision-related problems in aging individuals.

In one study, patients using prostheses and patients with full natural teeth were compared in terms of chewing efficiency. In this study, when different performance levels and norms were evaluated, it was emphasized that chewing efficiency was as low as one-sixth in those who used full dentures compared to full-toothed patients.

There are many studies that examine the health levels and life expectancy of patients by linking them with dental health. Poor chewing activity at an advanced age can lead to involuntary weight loss and an increase in the number of deaths. However, it has been reported that patients with significant tooth loss have a greater risk of becoming obese.

After taking into account the traditionally known risks of a heart attack, a heart attack is still the most common cause of death, but there is a significant relationship between dental diseases and heart disease. The prediction that restoring the chewing systems of these patients to function normally will improve the quality and duration of life of these patients contains a very consistent logic.

Movable segmented prostheses with soft tissue support are one of the types of prostheses that are positively received by patients at the lowest level. Half of the patients with movable segmented prostheses report that they chew better without prostheses.

According to the results of a 45 year follow-up study, only 81 percent of patients who use this type of prosthesis at end of the first year continue to use their prostheses. In cases of free-ending toothlessness, this rate drops to 60 percent at the end of 4 years.

In another follow-up study conducted in cases of free-ending toothlessness, the rate of patients using their prostheses at the end of five years is about 60 percent. This figure drops to 35 percent at the end of 10 years. In another study, it was reported that the number of prostheses used for more than six years is very small.


Problems with movable segmented prostheses include:

Short service life: 60 percent in four years

35 percent availability in 10 years

The rate of repair of supporting teeth: 60 percent in five years and 80 percent in 10 years

Mobility, plaque, increased bleeding in bone control and decay in supporting teeth

45 percent permanent tooth loss in 10 years

Acceleration of bone loss in the toothless area if a prosthesis with a movable section is used.

Reports on prosthetics with movable partitions reveal that the health of the remaining teeth and surrounding oral tissues is often impaired. In a study in which the emergence of a need to regulate the support tooth was considered a failure, it was reported that the five-year success rate of traditional movable segmented prostheses was 40 percent and the 10-year success rate was 20 percent.

In patients who use removable partial dentures, there is often an increase in movement in the supporting teeth, an increase in tartar, more bleeding when measuring depth, a higher incidence of caries, difficulty speaking, a decreased sense of taste, and an inability to adapt to use. In a study conducted, it was reported that support tooth losses occurred at a high rate of 24 percent in five years and 37 percent in eight years.

In addition, it is necessary to take into account that the rate of bone resorption increases in areas that benefit from soft tissue support. Therefore, alternative treatments are necessary that will improve oral conditions and protect the bone.


Decrease in the width and height of the supporting bone

Painful areas that increase with the prominence of the inner oblique ridges

Gradual decrease in hard tissue

The appearance of the upper shiny tubercles and, with it, painful areas and an increase in the mobility of the prosthesis

Muscle connections in the immediate area on the jawbone

The prosthesis rises in the mouth with muscle contraction of the cheek muscles, which act as a back support

Movement of the prosthesis forward from the anatomical slope (With moderate to advanced bone loss, the lower jaw becomes angled)

Thinning of the tissue, making it susceptible to abrasion

Basic bone loss

The canal of the lower jaw, which shows the opening

Taking on a more active role of the tongue during chewing

The effect of bone loss on the aesthetic appearance of the lower third of the face

Increased risk of trunk fracture in the lower jaw due to advanced bone loss.

Loss of the anterior ridge of the nasal protrusion and, as a result, an increase in the mobility of the prosthesis and painful areas.


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President of Organ Transplant Center at MedicalPark Hospital Antalya

Turkey's world-renowned organ transplant specialist. Dr. Demirbaş has 104 international publications and 102 national publications.

Physician's Resume:

Born on August 7, 1963 in Çorum, Prof. Dr. Alper Demirbaş has been continuing his work as the President of MedicalPark Antalya Hospital Organ Transplantation Center since 2008.

Prof. who performed the first tissue incompatible kidney transplant in Turkey, the first blood type incompatible kidney transplant, the first kidney-pancreas transplant program and the first cadaveric donor and live donor liver transplant in Antalya. Dr. As of August 2016, Alper Demirbaş has performed 4900 kidney transplants, 500 liver transplants and 95 pancreas transplants.

In addition to being the chairman of 6 national congresses, he has also been an invited speaker at 12 international and 65 national scientific congresses. Dr. Alper Demirbaş was married and the father of 1 girl and 1 boy.


Eczacibasi Medical Award of 2002, Akdeniz University Service Award of 2005, Izder Medical Man of the Year Award of 2006, BÖHAK Medical Man of the Year Award of 2007, Sabah Mediterranean Newspaper Scientist of the Year Award of 2007, ANTIKAD Scientist of the Year Award of 2009, Social Ethics Association Award of 2010, Işık University Medical Man of the Year Award of 2015, VTV Antalya's Brand Value Award of 2015.


Doctor of Medicine Degree Hacettepe University Faculty of Medicine Ankara, General Surgeon Ministry of Health Turkey EKFMG (0-477-343-8), University of Miami School of Medicine Member of Multiple Organ Transplant, ASTS Multiorgan Transplant Scholarship. Lecturer at Kyoto University. Lecturer at University of Essen, Research assistant at the University of Cambridge .

Professional Members:

American Society of Transplant Surgeons, American Transplantation Society Nominated, Middle East and Southern Africa Council Transplantation Society 2007, International Liver Transplantation Association, Turkish Transplantation Association, Turkish Society of Surgery, Turkish Hepatobiliary Surgery Association.


Our website contents consist of articles approved by our Web and Medical Editorial Board with the contributions of our physicians. Our contents are prepared only for informational purposes for public benefit. Be sure to consult your doctor for diagnosis and treatment.
Medically Reviewed by Professor Doctor Alper Demirbaş
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