This Clinical and radiographic study will be designed to evaluate the temporomandibular joint condition post longstanding mouth opening during dental procedure using rubber dam. primary outcome : preoperative and postoperative assessment of interincisal distance , occlusal biting force , visual analogue scale , lateral excursion movement and Magnetic resonance imaging (MRI). Secondary outcome: investigator will try to answer the question of what is the best duration of time could the dentist use rubber dam isolation in dental procedures without harmful effect on TMJ and its supporting structures?
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Interincisal Distance
Timeframe: Preoperative, immediately postoperative, 2 weeks postoperative.
Occlusal Biting Force
Timeframe: Preoperative, immediately postoperative, 2 weeks postoperative.
Visual Analogue Scale (VAS)
Timeframe: Preoperative, immediately postoperative, 2 weeks postoperative.
Magnetic Resonance Imaging (MRI)
Timeframe: 2 weeks postoperative (for symptomatic patients).
Lateral Excursion Movement
Timeframe: Preoperative, immediately postoperative, 2 weeks postoperative.