School Work

Simultaneous Presence

of 3
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Related Documents
  INTRODUCTION A majority of the unusual anomalies of human teethbecome evident during the childhood years. Anomaliesof teeth are classified according to their abnormalitiesin number, shape, color, structure and texture,eruption and exfoliation, and position. Exfoliation ofthe primary teeth and eruption of the permanentteeth is a normal and predictable physiological process. The most frequently occurringsequence of eruption in the maxilla is as follows: permanent first molar, central incisor, lateralincisor, first premolar, second premolar, canine, second and third molars.Prolonged retention of primary teeth isnot uncommon finding. The possiblecauses for that anomaly are: (1) agenesisof the succedaneous teeth, (2) thepresence of dense sclerosed bone aroundthe crown of the succedaneous teeth, (3)failure of the normal resorption of theroots of the primary teeth, and (4)aberrations in the eruption of the teethdue to systemic disorders 1, 2 . Retainedmandibular primary incisor frequently causes lingual eruption of corresponding permanentsuccessor. Impacted or deflected permanent canine causes retention of its primary predecessor.Missing premolar often result in retention of the primary molar. The purpose of this paper is to report a case of the simultaneous presence of primary secondmolar and second premolar associated with missing lateral incisors in the same jaw of a healthyadult. CASE REPORT A 22-year-old male attended the clinic for routine restorative care. His physical developmentwas within normal limits and the medical and dental histories were unremarkable. SIMULTANEOUS PRESENCEOF A PRIMARY SECOND MOLAR ANDSECOND PREMOLAR IN THE SAME JAWOF ADULT MALE: REPORT OF CASE ABSTRACTSimultaneous presence of a primary molar andcorresponding successor in adult is a rare feature. Thispaper describes an unusual case in which the maxillaryprimary second molar was retained between eruptedsecond premolar and first permanent molar in thesame jaw concomitant with congenitally missinglateral incisors. This case presents questions concerningetiology of over-retention of primary teeth.Faiez N. Hattab, BDS, PhD a and Juan J. Segura, DDS, MD, PhD b Address for correspondence: Dr. Faiez N. Hattab, DentalHealth Services, Primary Health Care, P.O.Box 7604,Doha, State of Qatar, E-mail: a Consultant and Chief of Dental Health Services, Primary Health Care, Doha, State of Qatar. b Associate Professor, Dental Pathology and Therapeutics, Faculty of Dentistry, University of Seville, Spain.    D   E   N   T   A   L   N   E   W   S ,   V   O   L   U   M   E   X ,   N   U   M   B   E   R   I   I   I ,   2   0   0   3 SIMULTANEOUS PRESENCEOF A PRIMARY SECOND MOLAR ANDSECOND PREMOLAR IN THE SAME JAWOF ADULT MALE: REPORT OF CASE ã SIMULTANEOUS PRESENCE OF A PRIMARY SECOND MOLAR AND SECOND PREMOLAR IN THE SAME JAW OF ADULT MALE: REPORT OF CASE ã 09  No history of dentofacial trauma was recalled. Extraoral examination was noncontributory.Intraoral examination revealed no hard or soft tissues abnormalities. A clinical dentalexamination showed bilateral absence of maxillary lateral incisors and the following teethwere present in the maxillary right quadrant: 11, 13, 14, 15, 55, 16, 17, and 18. The rest ofpermanent teeth, including the third molars, were present in the contralateral side of the arch(Fig. 1). All mandibular teeth were present inaligned position. The over-retained maxillaryright primary second molar showed attrition,mobility, tenderness to percussion, but wasfree of restoration or caries (Fig. 2). Themaxillary right second premolar developedmesial to the primary second molar.The mesiodistal crown diameters of themaxillary central incisors and maxillary rightsecond premolar were 8.1 mm and 5.5 mmrespectively; i.e., approximately 10% and 21%smaller than their counterpart in the general population 3 . The maxillary midline diastemameasured 5.1 mm. It was observed further an anterior open bite of 2 mm, with occlusioncontact mainly found on the permanent first molars. There were marked interdental spacesbetween the maxillary anterior teeth while the posterior teeth of the affected side (rightmaxillary quadrant) showed lack of interdental spaces resulted in malalignment of teeth andslightly intruded second permanent molar (Figs. 1 and 2). In the contralateral side, thepermanent second molar was palatally displaced. Otherwise the teeth showed normalmorphology.Radiographic examination confirmed the missing of maxillary lateral incisors and complete rootresorption of the over-retained maxillary right primary second molar. Treatment involvedextraction of the symptomatic retained tooth and referring the patient for orthodonticintervention. (Fig. 1) Maxillary cast showing the right second premolar erupted mesial to the over-retained primary second molar.The lateral incisors were congenitally missing.(Fig. 2) Clinical appearance of the over-retained primary  second molar. Note occlusal attrition of the primary second molar and crowding posterior teeth.    D   E   N   T   A   L   N   E   W   S ,   V   O   L   U   M   E   X ,   N   U   M   B   E   R   I   I   I ,   2   0   0   3 ã SIMULTANEOUS PRESENCE OF A PRIMARY SECOND MOLAR AND SECOND PREMOLAR IN THE SAME JAW OF ADULT MALE: REPORT OF CASE ã 10  DISCUSSION In the normal development sequence exfoliation of a primary tooth usually precedes eruptionof the permanent successor. Exception are not infrequent, however, since only slightdisplacement of the succedaneous tooth germ (particularly in the incisor region) will causethese teeth to erupt with the primary predecessors remain in situ.The literature on displaced teeth is usually limited to ectopic eruption of permanent first molarand teeth transpositions. Ectopic eruption of first permanent molar refers to abnormal positionof this tooth, causing premature resorption of the distal surface of the second primary molar 4 .Tooth transposition is a unique type of ectopic eruption in which adjacent teeth haveinterchanged position in the dental arch 5, 6 .The present report describes unusual case manifested by: (1) over-retained primary secondmolar between erupted second premolar and first permanent molar, (2) complete rootresorption of the retained tooth in the absence of underneath permanent successor, and (3)congenital missing of the lateral incisors in the same jaw. None of the causes reported forprolonged retention of primary teeth could explain the over-retention of the present case.Further, the root resorption of the retained tooth in the absence of succedaneous tooth deniesthe effect of proximity as a determinant factor in the process of resorption. Joshi and Bhattreported similar observation 7 .It is interesting to consider why this condition occurred. The most likely explanation is thattooth #55 was retained because its successor was drifted mesially subsequent to median shiftof the first premolar into the space created by missing lateral incisor. This was evident fromspace deficient in the lateral incisor region (Fig. 1). The mesial migration of the first premolarcould be explained by premature loss of the primary first molar and early eruption of the firstpremolar into the space available anteriorly. History of trauma, however, cannot be excludedwith certainty as a factor of mesial development of the second premolar germ. Earlierdiagnosis and removal of the retained primary second molar may allowed mesial shifting of thepermanent first molar into the space previously occupied by the primary second molar withresulting alignment of teeth and functional occlusion. 1. Stewart RE, Barber TK, Troutman KC, Wei SHY. Pediatric Dentistry: scientific foundations and clinical practice. St Louis:The C.V. Mosby Co. 1982:276-277.2. Dayal PK, Shodan KH, Bihani VK. Prolonged retention of multiple primary teeth. J Dent Child 1982; 49:145-146.3. Hattab FN, Al-Khateeb S, Sultan I. Mesiodistal crown diameters of permanent teeth in Jordanians. Archs Oral Biol 1996;41:641-645.4. McDonald RE, Avery DR. Dentistry for the child and adolescent. St. Louis: The C.V. Mosby Co., 1987, pp.772-774.5. Peck S, Peck L. Classification maxillary tooth transposition. Am J Dentofac Orthop 1995; 107:505-517.6. Segura JJ, Hattab FN, R?os JV. Maxillary canine transpositions in two brothers and one sister:† Associated dentalanomalies and genetic basis. J Dent Child 2002; 69:54-58.7. Joshi MR, Bhatt NA. Canine transposition. Oral Surg Oral Med Oral Pathol 1971; 31:49-54. REFERENCES ã SIMULTANEOUS PRESENCE OF A PRIMARY SECOND MOLAR AND SECOND PREMOLAR IN THE SAME JAW OF ADULT MALE: REPORT OF CASE ã 11
Related Search
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks