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Purpose <p>Restoration of the bite force is an indication of biomechanically sound stomatognathic system. It is however unclear if the alloplastic total joint replacement (TJR) restores the bite force when used for the treatment of temporomandibular joint ankylosis (TMJA). The purpose of the present study was longitudinal analysis of the bite force after alloplastic TJR in TMJA patients.</p> Methods <p>A prospective study was implemented on TMJA patients planned for treatment with alloplastic TJR. The primary objective was to measure the bite force at 1-week, 1-month, 3-month, 6-month and 1-year follow-up (test group). The secondary objective was to compare the measured the bite force with that of age, sex matched normal individuals (control group), measure maximal incisal opening (MIO), record re-ankylosis and assess the quality of life (QOL). The bite force was recorded using specially designed strain gauge based transducer using wheatstone bridge based electronic circuit. Quantitative data was summarized as mean and SD. Mann Whitney U Test and Friedmann test were used for comparing the bite force. Pearson’s correlation coefficient was tested the significance of correlation between test variables. P-value of &lt; 0.05 was considered as statistically significant difference.</p> Results <p>The study sample included 13 TMJA patients (Male: Female = 8:5) treated with alloplastic TJR. The control group had 13, age and sex matched individuals. The mean age was 26 + 11.6 and 29.1 + 3.9 years in the test and control group respectively. For the purpose of the bite force measurement the patients were followed up for 1-year. Statistically significant increase in the bite force was seen from a follow-up of 1-week to 1-year post TMJ-TJR (<i>p</i> = 0.001) Although, there was significant difference from control group, the final mean bite force was within the range as reported in literature. Assessment of the QOL questionnaire revealed satisfaction with chewing as qualitatively recorded for change in chewing, satisfaction with chewing and no difficulty in chewing post TMJ TJR.</p> Conclusion <p>TJR in TMJA patients progressively restores the bite force significantly. The bite force achieved though sufficient to provide adequate chewing ability, is lower than that in the normal individuals. This may be due to the decreased surface reattachment of stripped muscles of mastication after TJR.</p>

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Does the Reconstruction with Total Joint Replacement Help in Improving the Bite Force in Patients with Temporomandibular Joint Ankylosis?

  • 期刊论文

  • 发表日期：

    2026年3月4日

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  • Pawan Kumar,
  • Poonam Yadav,
  • Ongkila Bhutia,
  • Rahul Yadav,
  • Devalina Goswami,
  • Ajoy Roychoudhury

摘要

Purpose

Restoration of the bite force is an indication of biomechanically sound stomatognathic system. It is however unclear if the alloplastic total joint replacement (TJR) restores the bite force when used for the treatment of temporomandibular joint ankylosis (TMJA). The purpose of the present study was longitudinal analysis of the bite force after alloplastic TJR in TMJA patients.

Methods

A prospective study was implemented on TMJA patients planned for treatment with alloplastic TJR. The primary objective was to measure the bite force at 1-week, 1-month, 3-month, 6-month and 1-year follow-up (test group). The secondary objective was to compare the measured the bite force with that of age, sex matched normal individuals (control group), measure maximal incisal opening (MIO), record re-ankylosis and assess the quality of life (QOL). The bite force was recorded using specially designed strain gauge based transducer using wheatstone bridge based electronic circuit. Quantitative data was summarized as mean and SD. Mann Whitney U Test and Friedmann test were used for comparing the bite force. Pearson’s correlation coefficient was tested the significance of correlation between test variables. P-value of < 0.05 was considered as statistically significant difference.

Results

The study sample included 13 TMJA patients (Male: Female = 8:5) treated with alloplastic TJR. The control group had 13, age and sex matched individuals. The mean age was 26 + 11.6 and 29.1 + 3.9 years in the test and control group respectively. For the purpose of the bite force measurement the patients were followed up for 1-year. Statistically significant increase in the bite force was seen from a follow-up of 1-week to 1-year post TMJ-TJR (p = 0.001) Although, there was significant difference from control group, the final mean bite force was within the range as reported in literature. Assessment of the QOL questionnaire revealed satisfaction with chewing as qualitatively recorded for change in chewing, satisfaction with chewing and no difficulty in chewing post TMJ TJR.

Conclusion

TJR in TMJA patients progressively restores the bite force significantly. The bite force achieved though sufficient to provide adequate chewing ability, is lower than that in the normal individuals. This may be due to the decreased surface reattachment of stripped muscles of mastication after TJR.