ORTHO
Internal rotation according to Bjork and Skieller, which is correct-
Can be backward if jaw lengthens; anterior dimension > posterior dimensions
The simplest form of orthodontic movement: A. Bodily movement B. tipping C. Rotation D. extrusion E. Intrusion.
B
SNA increases what happens? ! !
-Prognatic maxilla!
9. In which case eruption of the permanent first molar mesially compressed adjacent primary teeth cause resorption of the root? a) ectopuc eruption b) intrafollicullar resorption c) internally resorption
A
A functional appliance becomes active when A. screws and springs are added B. arch expansion is added C. finger springs are added D. answer all the above
A
A screw in a Schwartz type active plate opens A. 1mm per complete turn B. 0.5 mm C. 0.25 D. 5mm E. none is correct
A
Convex facial profile: A. Indicates skeletal CLass II B. Class III C. Can result from maxilla too far backward D. " " Mandible too far forward. E. Answers A and C are correct
A
Easily retained? a) Upper canine b) Upper premolar c) Lower first premolar d) Lower central incisor
A
First order bends used in standard edgewise technique, in contemporary prefabricated/preadj.....are replaced by: A. different bracket-base thickness for various groups of teeth B. different wire dimensions in anterior and posterior segments C. different ways of tying the wire in the bracket slots D. are not compensated in contemporary brackets
A
In primary dentition, there is congenital missing lateral incisor, which of the following is most likely to occur? a) permanent lateral incisor is also missing b) permanent lateral incisor is slow to erupt d) permanent lateral incisor is normal eruption e) permanent lateral incisor is transposed with permanent canine
A
Mandible angle decreases and decreases lower facial height A. Total deep bite B. Partial deep bite C. Open bite D. ... E. all
A
Reinclusio dentis is not: A. most frequent for lower primary incisors B. getting worse during the growth of the patient C. most frequent for lower primary molars D. usually due tro ankylosis E. answers A and B are correct
A
The first doctor that invented the headgear? A.Norman Kingsley B.Angle C. Harvold D. Moyer
A
Timming of Orthognathic surgery A. in patient with problems of excessive growth orthognathic surgery should be delayed until growth is essentially completed B. In pateints with problems of excessive growth should be undertaken during mixed dentition period C. In pateints with growth deficiency surgery should be always performed before growth completes. D. Surgical advancement of the maxilla is a treatment of choice in Class III in patients before growth is completed. E. Surgical Bone grafting in cleft lip and palate patient us usually performed the age 4-5
A
Which fo the following are the least likely to result from persistent long-term thumb-sucking? A. a deep bite B. protrusion of maxillary incisors C. Constriction of maxillary arch D. Open bite. E. lingual inclination of lower incisors
A
Which of the following are the least likely to result from persistent long-term thumb-sucking? A. a deep bite B. protrusion of maxillary incisors C. Constriction of maxillary arch D. Open bite. E. lingual inclination of lower incisors
A
the advantages of the twin block A. Nearly full range of mandibular movement. B. Displacement of incisors. C. very good distinctive speech D. All are correct E. A and B
A
The type of tooth movement usually produced by a removable appliance is: B A. torque B. tipping C. rotation D. bodily movement (translation) E. true intrusion
B
What can we see on the cephalogram when patient has clef lip, palate, and anterior crossbite a) protrution of maxilla b) retrution of maxilla c) protrution of mandile d) retrution of mandible
B
50. Best way to change Mandibular Deficiency A. Relax Muscle B. Apply force to move mandible forward C. Move mandible forward by self control D. A&C E. all
B
A patient has ● forward position of the chin with point Pg in front of anterior border of biometrical space ● reverse overjet ● class III relationship on molars The patient has: B. position mandubulae anterior C. distoocclusio totalis D. mesioocclusio totalis E. pseudomesioocclusio F. pseudodistoocclusio
B
Alveolar secondary Bone graft in the cleft lip & palate patients: A. is performed at the age of 15 B. is to obtain stability of the cleft area and to create a healthy environment erupting permanent teeth C. the graft is placed after eruption of the permanent cainine. D. the grafting of alveolar bone can result in excessive tension of the upper lip. E. grafting can be concidered only in a unilateral cleft lip and palate.
B
Angles classification describes: A. Class I, II, III B. Normal, Class I, II, II C. The transversal relation of the first permanent molars (sagittal would be correct) D. A and C E. B and C
B
Combinaded surgical and orthodontic treatment: A. severe skeletal disharmony in a growing patient is the main indication for orthognathic surgery B. severe skeletal discrepancy in a non-growing patient is an indication to consider orthognathic surgery C. camouflage treatment is the best option in severe skeletal discrepancy D. surgical set back of the mandible should be considered even in mixed dentition as early as possible E. the stability of the chin augmentation and reduction is very problematic
B
Kollman's rule is: A. space between primary incisors just before dental exchange B. equal height of three parts of the face in permanent dentition C. entire profile of the patient fits into biometric space D. upper incisors ahead of the lower incisors
B
Mandibular Dystosis (Treacher Collins Syndrome)? which is correct? A. Most common congenital defect involving face and jaws B. Generalized lack of mesenchymal tissue C. Occurs only on one side of face D. Is Synostosis problem E. Ears are never involved
B
Posterior crosbite: A. may be skeletal when the palatal width is adequate B. may be dental when the palatal width is adequate C. may be dental when the palatal width is too narrow D. a and c E. no answer is correct
B
Presurgical Orthodontics A. Usually requires more than 2 years of treatment B. the aim of pre surgical orthodontics is to align the arches and make them compatible C. at the end of orthodontic preparation for the surrey very elastic thin arch wire are placed surgeon to manipulate the teeth D. decompensation of the class III malocclusion the class III inter maxillary traction is used E. decompensation of the Class II malocclusion the class II inter maxillary traction is used
B
The adenoidal face is characterized by: A. narrowing of lower arch B. buccal crossbites C. no changes in lower facial height D. retruded upper incisors E. all the answers are correct
B
The decrease of Go angle and NL/ML angle combined with decrease of lower facial height is typical for patient with a) skeletal open bite b) skeletal deep bite c) vertical maxillary excess d) dental alveolar open bite e) deformation of mandible due to rachitis
B
The following drawing a) first order ; second order ; third order b) second order ; first order ; third order c) first order ; third order ; second order d) third order ; second order ; first order e) third order ; first order ; second order
B
ability to provide anchorage (from big to small) 1)maxillary central incisor 2)maxillary canine 3)maxillary first molar 4)mandibular incisors a)2314 b)3214 c)3241 d)1423
B
in lingual crossbite A. the upper arch can be too narrow B. the lower arch can be too narrow C. usually both arches are too wide D. this malocclusion can be only bilateral E. answers B and D are correct
B
lingual crossbite: A. lingual cusps of lower posterior teeth are in contact with central sulcus of posterior upper teeth B. palatal surfaces of upper posterior teeth are in contact with buccal surfaces of lower posterior C. buccal cusps of upper posterior teeth are in contact with buccal cusps of lower posterior teeth D. can be observed only unilaterally E. can be observed only bilaterally
B
mark the malocclusion in relation to frontal plane: A. upper arch constriction B. prognathic maxilla C. functional lateral shift of the mandible D. lingual crossbite E. excessive overbite
B
Analysis of lateral cephalogram revealed increase ANB angle, decreased SNB angles and no changes in SNA angle. This is typical for: A mesioocclusio partialis B pseudodistoocclusio C position mandubulae posterior D distoocclusio totalis E pseudomesiooclusio
C
Bolton analysis concerns: A. Evaluation of dental arch length B. Space analysis in mixed dentition period C. evaluation of proportionality in size of lower and upper teeth D. evaluation of teeth rotations E. evaluation of dental arch width
C
Choose contraindication for serial extractions: A. narrow face and basal bones B. space deficiency between 8 and 15mm C. decreased lower facial height and profile concavity D. convex profile E. correct sequence of dental exchange evaluated on pantomogramic radiograph pano for treatment
C
Choose the most typical archwire sequence for patient treated with straight line wire technique with .018 slot? a) round .016NITI. rectangle:.022x.022 NiTi. co-axial .015SS. rectangle .016x.016SS b) rectangle .016x.016 NiTi. rectangle .016x.016SS. co-axial .015SS. round.016NiTi c) co-axial .015SS. round .016NiTi. rectangle .016x.016NiTi. rectangle .016x.016SS d) rectangle .016x.022SS. co-axial .015SS. round .016NiTi. rectangle .016x.016NiTi e) co-axial .015SS. rectangle .016x.016NiTi. round.016NiTi. rectangle .022x.016SS
C
Decreased angle between maxillary plane and mandibular plane is typical for: A. supraoccusio B. buccal crossbite C. skeletal deep bite D. mesiocclusio totalis E. is not decreased in all listed above
C
How would you treat 8-years old patient with anterior crossbite due to retroclination of upper incisors and sufficient space for upper teeth: A. with lower active plate with active lower labial bow B. with low pull headgear C. with upper plate with active spring at palatal surface of upper incisor in crossbite D. with vestibular plate E. treatment should be delayed until eruption
C
In long face individuals: A. lower anterior face height decreases B. the mandible rotates forward C. there is an increased mandibular plane angle D. there is a nearly horizontal palatal angle E. plane is rotated down posteriorly
C
Internal rotation of mandible according to Bjork and Skieller A. connected only with rotation around the condyle (matrix rotation) B. connected only with rotation centred within the body of the mandible ( C. may be backward if it lengthens anterior dimensions more than posterior ones D. in long face individuals it brings the chin forward E. in short face individuals it brings the chin downward and backward
C
Removing the cause and eliminating the remerging irregularities in the short period of time characterize: A. Preventative Actions B? C. Appropriate treatment D? E?
C
Second physiological deep bite: A. is usually observed in 14 years old females and 16 years old males B. vertical overlap of primary incisors before eruption of primary molars C. deeper vertical overlap of permanent incisors in early mixed dentition D. horizontal overlap of permanent incisors bigger than 5 mm E. malocclusion observed in 9 years old children
C
Space for eruption of permanent mandibular molars is created by A. apposition of the alveolar process B. apposition at the anterior border of the ramus C. resorption at the anterior border of the ramus D. Resorption at the posterior border of the ramus
C
What are changes in lateral cephalogram in class III malocclusion with forward position of the mandible? A. ANB increased, SNA normal, SNB increased B. ANB increased, SNA decreased, SNB increased C. ANB decreased, SNA normal, SNB increased D. ANB increased, SNA decreased, SNB decreased E. ANB decreased, SNA normal, SNB decreased
C
the bone formation of maxilla is not characterized by: A. taking place in membrances of connective tissue B. beginning in the embryo C. bone cells replacing chondrocytes D. collagen matrix undergoing ossification E. osteoprogenitor cells differentiated into osteoblasts
C
Concave face, convex face?
Convex= Class II (retrognathism, overjet) Concave= Class III (Proganthism)
42. The term "subdivision" refers to ; A. less severe type (cusp to cusp) class II malocclusion B. less severe type of class III malocclusion C. Class II and Classs III malocclusions with lingual crossbite D. unilateral Class II or Class III malocclusion E. class II or class III malocclusion with deep overbite
D
57. Presented on this picture (Nance appliance) a) is passive and fixed b) can be used for space maintain c) can be used to reinforce the posterior anchorage d) all of above e) none of the above
D
Active tooth borne appliances A. they have springs or screws B. the have screw for arches expansion C. they have springs to move teeth D. all correct E. A+B correct
D
Anterior crossbite of permanent incisor in mixed dentition is commonly associated with: a) problem with upper frenum b) unexplained genetic factor c) lingually situated supernumerary teeth d) prolonged retention of a primary tooth [causing upper incisor eruption in the palatal direction e) none of the above
D
Bone formation by endochondral ossification A. occurs in cranial vault B. is observed in Meckel's cartilage, the initial cartilaginous form of mandible C. is observed only in long bones D. is typical for bones of cranial base E. occurs only in postnatal lift
D
Cephalometrics is useful in assessing which of the following relationship? A. tooth-to-tooth B. bone-to-bone C. tooth-to-bone D. all of the above E. none of the above
D
Choose active element among those given below: A. facets for posterior B. buccal shields C. occlusal bite blocs D. finger spring for tipping E. Adam's clasps
D
Closure of the secondary palate: A. occurs at 13-14th week of development B. Follows the closure of the primary palate by 6 weeks C. occurs in Pierre Robin's syndrome D. occurs by elevation of the palatal shelves E. B and D
D
Differences in development of removable in Europe and USA A. Angles approach to occlusion heavy impact in US B. European Social Welfare system development C. Problems with precious metals in Europe. D. All are correct E. Answers A and C
D
Frequency of malocclusions : A. Class III malocclusions are less frequent than class II malocclusions B. the open bite is more frequent in black than in white populations C. the frequency of midline diastema decreases with age. D. answer A. B . and C are correct. E. all previous answers are false.
D
In Children it is very difficult to evaluate A. Type of swallowing B. Wrong pronunciation C. Type of breathing D. Centric Relation Position E. Lip Competence
D
Increased Nasolabial angle A. Malformation of nose B. Retruded upper lip C. Protrusion of maxilla and mandible D. A & B E. all above
D
Mandible grows by A. direct surface apposition and remodeling B. endochondreal activity C. periosteal activity D. A,B,C E. A and C
D
Originally the Crozat appliance considered of: A. Clasp for first molar B. heavy gold wires as a framework C. lighter gold finger springs D. all correct E. A + C correct
D
Orthodontic correction of which of the following malocclusion is most a) Midine diastema in adult b) Rotation of lower incisor c) Expansion of lower dental arch d) Incisor crossbite with correct overbite e) Skeletal deep bite in adult p't
D
Orthodontic stainless (SS) wires and NiTi wires of the same dimension : A. SS wires have bigger range and bigger stiffness than NiTi wires B. SS wires have smaller range and smaller stifness than NiTi wires C. SS wires have bigger range and smaller stiffness than NiTi wires D. SS wires have smaler range and bigger stiffness than NiTi wires E. the range and the stiffness of both wires are the same
D
Orthognathic surgery A. is usually performed in a growing patient B. is used mainly in dento-alveolar problems C. the entire orthodontic treatment is commenced after surgery D. orthodontic decompensation of the malocclusion before surgery is required E. most of the desired presurgical tooth movement can be obtained with removable appliance
D
Premature loss of a primary maxillary second molar usually produce a malocclusion in the permanent dentition that is characterized by? A. crowded maxillary incisors B. palatal displacement of permanent canine C. delayed eruption of the permanent first molar D. a pseudo-class II molar relationship on the affected side E. a pseudo-class III molar relationship on the affected side
D
The tooth in the mandibular arch most likely to be maiposed in case of ...........crowding is the : A. first molar B. second molar C. first premolar D. second premolar E. canine
D
Unchanged SNA; increase ANB, ANPg, SNB, SNPg what kind of malocclusion it is?? a) Class I malocclusion b) class II malocclusion c) class III malocclusion d) postsion mandible posterior
D
What is the best choice for performing tooth movment along arches A. co-axial SS wire 0.015 B. round NiTi 0.014 wire C. round NiTi 0.016 wire D. rectangular 0.016 x 0.016 SS wire E. rectangular 0.018 x 0.022 SS wire
D
Anchorage: A. anchorage control is prevention of unwanted teeth movement during orthodontic treatment B. for anchorage reinforcement, more resistance units(teeth) should be added to out C. palatal bow can be used for anchorage control D. soft tissue (lip,palatal mucosa) can be used for anchorage E. all previous answers are correct
E
Chin-cup with elastic traction can ben used for treatment of A. functional forward position of the mandible B. skeletal class II C. skeletal open bite D. skeletal deep bite E. can be used in both A and C
E
Class II relationship of first permanent molars may be due to: A. maxillary protrusion and normal mandibular position B. normal maxillary position and mandibular retrusion C. maxillary protrusion and mandibular retrusion D. bimaxillary retrusion with the mandible more retrusive than the maxilla E. all of the above
E
Class III intermaxillary traction can help in A. forward movement of upper molars B. retraction of lower anterior segment C. space closure during extraction treatment in class III patients D. achieving stable backward position of mandible in non-grwoing patients with macrogenia E. A B and C are correct
E
Comparing skeletal deep bite & supraocclusio (maxillary excess): a) excessive overbite is a typical symptom for both b) they are different terms of the same malocclusion c) it is possible to tell them apart base on soft tissue profile d) both A, B are correct e) both A, C are correct
E
Functional Appliance A. is one that changes the posture of the mandible B. Hold the mandible open and forward C. Causes the stretch of the muscles D. Can cause movement of teeth. E. All answers are correct
E
Herbst appliance ? A- fixed appliance B- removable C- cemented D- bonded E- all the above
E
In steiner's analysis, decrease of SNB angle shows? A. Maxilla protrusion B. Maxilla retrusion C. Maxillary dental arch retrusion D. Mandible protrusion E. Mandible retrusion
E
Intermitten forces cannot be produced by A. Removable appliances B. Headgear C. Screws and Springs D. Elastics E. Fixed appliance
E
Late crowding of lower incisors can be explained by: A .lack of attrition on interproximal surface(+ natural mesial drift of permanent posterior teeth) B. lack of attrition on occlusal surface of posterior teeth(implosion of dental arches) C. pressure from third molars D. late mandibular growth E. all of the above can contribute to the severity of late crowding
E
Measurement of mandibular corpus length for evaluation of morphological changes underlying xxxxx A. in performed on pantomographic radiogram B. enables differential diagnosis between skeletal and dental buccal crossbite C. in based on evaluation of relationship between length of mandibular corpus and length of that permmanent molars roots D. enables differential diagnosis between microdontia and macrogenia E. answers A,B,C and D are false
E
Morphological change in patient with skeletal open bite A. anterior rotation of maxilla B. enlargement of gonial angle C. backward rotation of mandible D. insufficient growth of posterior teeth E. answer A Band C are correct
E
Passive tooth-borne appliances: A. they dont have springs or screws B. they depend on soft tissues stretch and muscular activity C. they are a modification of the activator with springs for tooth movement D. all answers are correct E. A and B
E
Removable appliances are used for: A. Growth modificatiions B. Guidance of eruption of impacted teeth C. May be retention after comprehensive treatment. D. Answers A B C E. Answers A and C
E
Sagittal skeletal discrepancy A. is always succesfuly treated in an growing patient by modification B. should always be treated in growing patient by orthodontic camouflage C. orthodontic surgery should be performed before growth cessation D. if severe should be treated functionally at any age E. all answers given above are false
E
The first removable appliance in the USA A. was developed by George Crozat. B. was designed by William Proffit. C. was fabricated entirely of precious metal. D. all answers are correct E. A and C
E
The sequence of completion of facial growth by planes of space is A. length , width , height B. height , length , width C. width , height , length D. length, height , width E. width, length , height
E
Transpalatal fixed bow (" U" shapred of bihelix) A. can be used for interimolar width expansion B. can be sed for molar derotation C. can reinforce vertical anchorach on molars D. provides root torque control for molars E. all of the above
E
Which elements of removable appliance are for controlling tooth eruption? A. BiteBlock B. LingualShield C. OcclusalStops D. A&Ccorrect E. all above
E
Which feature is xxx typical (xxxxxxx) for the XXXXXXXXX A.bigger interdental space B. attrition on the xxxxxxx surfaces of primary teeth C. differential growth of mandible and xxxxxx D. space for eruption of first molar E. distal step
E
Which kind of speech problems can child with malocclusion have A. Lisp B. /t/,/d/ C. /f/,/v/ D. th,sh,ch E. all above
E
Which of the following are likely to occur during orthodontic therapy with fixed appliances ; A. gingival irritation B. cementum resorption C. increased mobility of teeth D. demineralization of enamel adjacent to appliance in patient with poor oral hygiene E. all of the above.
E
the growth site of maxilla bone is: A. tuberosity region B. anterior part of alveolar process C. oral side of palate D. answers A and B are correct E. answers A and C are correct
E
Removable orthodontic appliance should be worn for how long until a re-visit control at the ! ! dental office is needed
Firs 1-2 weeks follow up 4-6 weeks
Physiological responses to sustained heavy pressure against tooth is: i. blood vessels within PDL partially compressed on pressure side after 3-5 seconds ii. blood vessels within PDL occluded o pressure side after 3-5 seconds iii. metabolic changes occuring chemical messengers affect cellular activity, enzyme levels change after few hours iv. cell death in compressed area after few hours v. tooth movement beginning as osteoclasts oseaoblasts remodel bony socket after 2 days vi. tooth movements occur, undermining resoption removes lamina dura adjacent to compressed PDL after 7-14 days Correct answers: I,III I,III,V II, IV II,IV,VI II,III,IV
II,IV,VI
Postnatally maxilla develops only by?
Intramembranous ossification primary and secondary displacement surface remodeling
Stopping a habit before it turns into an orthodontic problem is called what?
Prevention
SNB decreases what happens?!
Retrognatic mandible!
Central incisor question?!
the height of the contour is distal to the midline of the tooth!
