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Oral Fx repair

Vet Dentistry

Which type of jaw fracture tooth involvement most frequently contributes to tooth morbidity When the fracture line follows the root surface from the gingival margin to the apical region, affecting both the periodontal and endodontic integrity
At what time frame should a re-implanted avulsed tooth receive endodontic therapy? 2 weeks
What liquid should be used for storage of an avulsed tooth pending reimplantation? cool milk
What is the most common location of rostral mandibular fracture in cats? symphysis
What is a type I mandibular fracture in Region A? mandibular symphyseal separation with no break in the mucosa
What is the defining characteristic of type II fracture? soft tissue disruption
What classifies a mandibular fracture in region A as type III? soft tissue disruption combined with comminution of bone fragments, often together with broken teeth
What are 2 different interdental wiring techniques that can be applied to stabelize a symphyseal separation? Stout's or Essig's technique
Which direction does the mandible deviate in the case of a unilateral fracture? toward the side of injury
According to fracture biomechanics, what is the tension side of the mandible? dorsal alveolar border
What is a favorable mandibular fracture? oriented running caudo-dorsally
What is an unfavorable mandibular fracture? oriented running caudo-ventrally
What configuration should be used with intraosseous wires to stabelize an unfavorable mandibular fracture? common placement site in the rostral segment and 2 sites in the distal segment to approximate a perpendicular relationship of the 2 wires (triangle configuration)
What is the most common location of mandibular fracture? Mandibular body, regions B, C, & D
What part of the mandible is considered regions E and F? Vertical ramus
What region is the TMJ part of? Region F
What is salvage tx for injuries to the TMJ that degenerate and limit effective use? condylectomy
What time frame do unilateral fractures dorsal to the condylar process take to heal using a tape muzzle? 2-3 weeks
What time frame do fractures below the condylar process in the vertical ramus take to heal? 4-5 weeks
What time frame is usually sufficient to form a stable callus after stablization of maxillary fracture? 3 weeks
What guidelines are used for placing a tape muzzle/ correct occlusion allowance of a 0.5 to 1.5 cm gap between maxillary and mandibular incisors
What are contraindications for a tape muzzle Brachycephalic breeds, problems with vomiting, respiratory distress
What is an alternative method to tape muzzles to limit oral movement while maintaining occlusion? interarcade wiring
What are 4 basic wiring techniques? osseous interdental adjunct interarcade
What adjunct must be applied with osseous wiring to provide stable fixation? immobilization of jaw as with interarcade bonding
What are 3 fundamental forms of osseous wiring? circumferential transosseous (interfragmentary) transcircumferential
How is circumferential wiring most commonly used in jaw fracture stabelization? for symphyseal separation
What gauge of stainless steel wire is typically used for interfragmentary wiring? 20-28. Usually 24 g
What other instruments are utilized to place interfragmentary wires? 14-20 gauge hypodermic needle and a No. 4 to No. 6 surgical length round bur
Which type of mandibular body fracture is trans-circumferential wiring most commonly used to repair? unfavorable fx
Where is the anchorage hole for trans-circumferential wiring placed? 3-4 mm from the alveolar crest over the fracture site
What is the most common gauge of stainless steel wire used in interdental wiring? 26 g (24-30)
What are the 4 basic types of interdental wiring? Ivy loop Stout's multiple loop Essig's technique Risdon's technique
What is the Ivy loop wiring technique ideal for? to reduce simple fractures between 2 teeth and securing acrylic appliances also can be used as anchorage for other attachments
What is Stout's loop? a single wire method incorporating more than 2 teeth: a continuation of the Ivy loop
In stout's loop technique, what is the working wire? the lead end that is passed back and forth through the interproximal spaces and forms the tightening loops
In stout's loop technique, what is the static wire? the lead that lays against the tooth and is fixed in place by the loops of the working wire lead
In Essig's wiring method, what is the primary wire? the master wire that is passed around all of the teeth to be incorporated in the support (usually incisors, sometimes canines too)
In Essig's wiring method, what are the secondary wires? short segments that are passed through an interproximal space, circling both the lingual and facial strands of the primary wire
When is Risdon's technique ideal? when greater strength of reduction is required
What is the underlying contributor to most potential complications associated with circlage wire stabelization of mandibular symphyseal separation? JVD Fall 2012 overtightening the wires. can lead to necrosis of soft tissues and/or underlying bone, malalignment of the symphysis
When comparing composite resin materials for maxillomandibular fixation in cats for tx of jaw fx and TMJ luxation, which material and technique is superior? Vet surg 2011 partial coronal surface acid etch before use of flowable composite
Why is flowable composite used after partial surface acid etch the best material/technique for fixation of mandibular fx or tmj luxation in cats? Vet surg 2011 maintains a strong bond yet allows easy material removal with a low complication rate
What configuration is considered a 'favorable' mandibular fracture? Vet Surg 2010 running in the rostroventral direction (forces applied by digastricus m. are counteracted by forces applied by masseter m)
in maxillomandibular fixation, what is the ideal distance the mouth should be left open? Why? J Small Anim Pract 2011 10-15 mm between incisor arcades, tips of canine teeth slightly overlapped. So the cat can use the tongue to lick food and the mouth will be closed enough for him to swallow it
What is a common reason for fixation failure when interarcade bonding is performed? J small anim pract 2011 breakage or bond failure of the composite between the canine teeth
What are the 6 categories of luxation? (in order of increasing severity) JVD Fall 2010 concussion, subluxation, lateral luxation, extrusive luxation, intrusive luxation, avulsion
What are the 3 biomechanical factors that should be considered in the choice of mandibular fracture repair technique? JVD Winter 2010 1. masticatory muscles 2. direction of fx line 3. forces involvedon the repair of the fx
in general, how many screws should be used (in plate repair techniques) to best stabelize the plate and structureal rigidity of the repair? JVD Winter 2010 more = better EXCEPT in mand. fx w/'favorable' configuration, decreasing the # of screws does not compromise stabelization (2 screws per side of fx minimum)
What are the 2 most common causes of mandibular fx in cats? JVD Winter 2010 vehicular trauma and falling from height
What is the most common complication of oral fx repair? JVD Winter 2010 malocclusion
What are 2 main goals of mandibular fx treatment? JVD Summer 2009 restoration of normal occlusion and rapid return to function
Created by: lamarron
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