Canine Occlusal Relationship Changes After Stainless-Steel Crown Placement Under General Anesthesia
Condition: Full Mouth Rehabilitation; Canine Overlap Relation; General Anesthesia
Study type: Interventional

Summary: 
      The aim of the study is to Assess and compare canine occlusal relation in children with
      carious primary molars before they are treated by stainless steel crowns under general
      anaesthesia and after their placement, evaluate the possibility and the time required for the
      post-operative canine relation to resolve and how the treatment affects frequency and type of
      food intake.
    

Detailed description: 
      1. The vertical overlap was determined after closing both arches in maximum intercuspation,
           intruding the tongue inwards away from the occlusal surfaces.

        2. After The patient had been anaesthetised, the measured values were recorded
           preoperatively and immediately after the treatment while the patient was unconscious.

        3. In order to achieve the maximum intercuspal position (MIP) at centric occlusion, it is
           recommended to gently push the tongue while using a metal spatula to close the patient's
           mouth.

        4. The distance between the gingival zenith from the upper to the lower deciduous canines
           was determined by the digital calliper in millimetres (Shenzhen Jiabaili Electronic
           Commerce Co., Ltd) at the right and left sides and a digital camera photographed the
           reading (iPhone 11 dual 12 MP Ultra-Wide and wide camera, Apple Inc.).

        5. The tooth is anesthetised, demineralised dentine will be removed, and if a pulpotomy or
           pulpectomy is needed (pulpotomy with Zinconol; Dentsply Sirona, Charlotte, NC, USA) and
           the subsequent restoration is with high-viscosity glass ionomer cement (GIC), The tooth
           will be prepared by occlusal, proximal reduction and; an SCC (3M™ ESPE™ Stainless Steel
           Primary Molar Crowns) will be tried and adjusted to fit the tooth. The size of the PMC
           that is tight enough to give a feeling of 'spring back' during seating should be
           selected. Occlusion is checked, and the SSC will be sealed with a GIC (CVI Fuji Plus;
           GC).

        6. Pre-operative determination of the vertical overlap of the upper and lower primary
           canines was done; after placement during the operation, four weeks, 2, and 6-month
           follow-up period.

        7. Tooth preparation was done according to the principles of Spedding *1 to have 1-mm
           clearance between the respective tooth and the opposing tooth, and SSCs (3M ESPE, St.
           Paul, MN, USA) were seated, and then the operator checked occlusion.

        8. After discharging the patient from the recovery room and re-establishment the function
           of the facial muscles, a questionnaire was taken from the parent assessing the
           preoperative state of the patient regarding pain and discomfort, swelling and type and
           frequency of food intake.

        9. As part of the measurement process, a single individual was responsible for capturing
           the readings while another person was documenting the results with a camera. This
           protocol was established to ensure accuracy and consistency in the results obtained and
           maintain a clear measurement record.

       10. Relief of symptoms and improvement of type and frequency of food intake were assessed by
           asking the parents.
    

Intervention name(s): Digital Caliper (Shenzhen Jiabaili Electronic Commerce Co., Ltd)
Intervention type(s): Device
Intervention description(s): Measuring the vertical distance between the tip of the upper and lower canine teeth.
Allocation: Non-Randomized
Intervention model: Parallel Assignment
Masking: None (Open Label)
Primary purpose: Screening