NEW
Font size
WorksheetsMock Exam BDS 1st Year 2025
Total questions: 30
Worksheet time: 15mins
The developmental stages of teeth are named after the shape of;
Dental papilla.
Dental sac.
Dental lamina.
Epithelial component.
Vestibular lamina.
The 'Dental Sac' will give rise to;
Ameloblasts & Enamel.
Odontoclasts.
Pulp & Dentin.
Cementum, Periodontal ligament & Alveolar Bone.
Odontoblasts.
In 'Cap Stage' of tooth development, the cells of 'Inner Enamel Epithelium' are;
Tall Columnar & in Concavity.
Cuboidal & in Concavity.
Tall Columnar & in Convexity.
Cuboidal & in Convexity.
Flattened cells.
A key feature of the initiation of tooth development is the formation of which of the following within the 'Primary Epithelial Bands'?
Mesenchymal invaginations.
Endodermal tubercles.
Ectodermal lens.
Placodes.
Tuberculum mediatus.
Ectodysplasin (Eda) mutation leads to;
Hyperdontia.
Anodontia.
Cleft lip.
Oligodontia.
Hypodontia.
A prime candidate for the induction of Lhx genes is;
Fgf-6.
Fgf-7.
Fgf-8.
Fgf-12.
Fgf-1.
Which of the following can be regarded as one of the fragmentized product of dental lamina?
Dentigerous cyst.
Odontogenic keratocyst.
Eruption cyst.
Periapical cyst.
Stafne's bone cyst.
In normal physiological architecture of the supporting apparatus of the tooth, 'Epithelial cell rests of Malassez' reside within the mature periodontal ligament. What is their function in this case?
Inflammation.
Mechanoreception.
Repair & Regeneration.
Collagen degradation.
Attachment of PDL to alveolar bone.
Which one of the following structures serves as an organizational centre which orchestrates 'Cuspal Morphogenesis'?
Enamel niche.
Enamel pearl.
Enamel knot.
Enamel lamellae.
Enamel tufts.
Tooth eruption is a process which is void of any bleeding incidence normally. This is because the epithelial barrier it crosses is;
Aneural.
Avascular.
Demineralized.
Anodontic.
Highly mineralized.
Dentin & functional ameloblasts in permanent 1st molars are visible at;
42-48 days.
55-56 days.
14 weeks.
18 weeks.
32 weeks.
The first Branchial arch gives origin to the;
Muscles of facial expression.
Muscles of mastication.
Facial nerve.
Glossopharyngeal nerve.
Hypoglossal nerve.
Cartilage of the third branchial arch will give rise to the;
Body and greater horns of the hyoid bone.
Cartilage of the larynx.
Stapes, styloid process & stylohyoid ligament.
Mandible and maxilla.
Mandible only.
During development, the second pharyngeal pouch is;
Largely obliterated in its connection to the pharynx as it expands into two compartments.
Largely obliterated by the development of the palatine tonsil; however a part persists as the tonsillar fossa.
Expanded to give origin to the inferior parathyroid gland, whereas the ventral component, with its anatomic counterpart from the opposite side, forms the thymus gland.
Expanded to give origin to the superior parathyroid gland, and the ventral portion gives rise to the ultimobranchial body, which in turn gives rise to the parafollicular cells of the thyroid gland.
Responsible for the formation of the otic and the optic placodes.
Which of the following structures are formed with the fusion of maxillary process and the lateral nasal process?
Olfactory placodes.
Optic placodes.
Parathyroid gland.
Nasolacrimal duct.
Primary palate.
The merging of the two medial nasal processes results in the formation of;
Sides of the upper lip.
Lower lip and chin.
Maxilla carrying incisor teeth.
Secondary palate and its portions.
Nasal bridge.
A patient diagnosed with 'Down Syndrome' will present with which of the following features;
Trisomy of chromosome number 20.
Production of monosomy situation.
Facial enlargement & lengthened palate.
Fissured tongue & delayed tooth eruption.
Monosomy of chromosome 21.
The 'Fetal Stage' in comparison to 'Embryonic Stage' is noted for;
Differentiation of major external structures.
Induction of major internal structures.
Growth & maturation.
Extreme vulnerability to congenital defects.
Differentiation into the major germ layers.
Which of the following supports the primitive embryo and is derived from Ectoderm alone?
Notochord.
Prochordal plate.
Secondary yolk sac.
Cardiac plate.
Primary yolk sac.
Within the trunk of the developing embryo, paraxial mesoderm breaks up into;
Thin layers called the intermediate mesoderm.
Thick layers called the lateral plate.
Somites consisting of somatomere components.
Somites consisting of sclerotome, dermatome & myotome components.
Cecal plate & cardiac plate.
Which of the following cells have migrated from neuroectoderm and are the basis for future pigmented cells & sympathetic neurons?
Somite cells.
Ectoderm cells.
Endoderm cells.
Trophoblast cells.
Neural crest cells.
Commonest cause of TMJ ankylosis is?
Trauma.
Developmental disturbances.
Infection.
Atrophy of joint.
Hypertrophy of joint.
The lateral pterygoid muscle;
Is attached to the condylar process and protrudes the mandible.
Is attached to the coronoid process and elevates the mandible.
Is attached to the condylar process and elevates the mandible.
Is attached to the coronoid process and protrudes the mandible.
Depresses mandible only.
The complex movements of TMJ allow all of the following except;
Protrusion, Retrusion, Lateralization of the jaw.
Maintain the correct pressure of the middle ear.
Breathing.
Maintain proper gait.
Phonation.
Which muscle is the most active during right lateral excursion of the mandible?
Left lateral pterygoid muscle.
Right lateral pterygoid muscle.
Right medial pterygoid muscle.
Left medial pterygoid muscle.
Left temporalis and masseter muscles.
A 35 years old female banker presents with pain and clicking in her temporomandibular joints bilaterally. She also has a history of bruxism. You make a provisional diagnosis of an internal derangement of her TMJs. Which of the following may be the LEAST appropriate measure to manage her condition?
Prescription of analgesics.
Provision of the night guard.
Relaxation therapy.
Use of chewing gum.
Use of soft diet.
The permanent incisor and its deciduous tooth germ both develop in a;
Single bony crypt.
Different bony crypt.
Either single or different bony crypts.
A different area.
In an axial & mesial direction.
The dentogingival junction is formed during the;
Pre-eruptive tooth movement.
Post-eruptive tooth movement.
Eruptive tooth movement.
Apical tooth movement.
Mesiodistal tooth movement.
The apical positioning of permanent tooth germ most often fails in;
Maxillary molars.
Mandibular molars.
Maxillary incisors.
Mandibular incisors.
Mandibular canines.
The pattern of resorption in an exfoliating tooth is determined by;
Erupting permanent tooth.
Blood supply to the area.
Oxygen tension in the area.
Acid secretion.
Tyrosinase activity alone.
