bruxism and sleep bruxism Day bruxism20% of the population Lavigne 2008Repetitive clenching (not grinding)Risk factors – not fully understood, multifactorial Normal clenching20 minutes of the day Grad 1969Day bruxism = usually phychological factors...
between occlusion and digestive tractMastication supresses initial gastric emptying Takada 2012Malocclusion reduces masticatory function, reduces gastric emptying rate, as it takes longer to eat Koike 2018Gastroesophageal reflux (GERD) in class 3...
functional relationship of condyle and glenoid fossa – as condyle articulates with the articular eminence, and not the glenoid fossa Greene 2018Condyle positioning varies on the stage of masticationNo ideal position of the condyle in the fossa...
processHyoid bone has to go up and down to swallow to produce a vacuumMolars have to be in contactSuprahyoid muscles required to elevate hyoid boneInfra hyhoid bone required to depress hyoid bone Relapse of AOB20% Greenlee 2011 S/R Unless new...
resorptionShape of periodontal ligament – middle PDL is the narrowest aspect = biggest risk of hylinisation When hylinisation occursNecrotic tissue require to be removedDone via mono and multinucleated cells- / macropharges. Produce cytoclines which...
shortening of the root due to tooth movement When moving a tooth what happens to the root?Craters in the cementum – due to over activation of cementoblastsCraters resolves on the root servicesBut not on the apex, unsure why Prevalence of RR25%...
tooth movement evidenceEl Angbawi 2015 & Cochrane RV by Fleming 2015 low quality evidence of acceleration of tooth movement How do teeth move quicker with the Regional Accelerated Phynomenon RAPTissue remodellingReduced dentistry of bone=...
in materialNot 3D printedMembrane material same for all patients – different malocclusions, aligners provide same force Defect in efficiency Kravitz 2009, SimonAnterior intrusion and extrusionCanine and premolar rotationincisor...
of alignersAesthetic Thai 2020Less white spot lesions Peter 2019Efficacy:Good for distalising 1.5-2.2mm Simon RaveraPoor expansion, mainly tipping Houle 2017Poor space closure Papadimitriou 2019 Challenges with alignersBodily movementDistalise...
to patients develop expectations?Previous experiencesWord of mouth – friends and familyMedia Experience of impacts due to the conditions RelevanceExpectations determine satisfactionExpectations also determine engagement with treatment Gassem...
