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Absence of all permanent second molars
Radiology forum
Volume70 Number 5
Fig.
1. Radiograph showing metallic object.
Fig.
Fig. 2. Removed object turned out to be tip of dental elevator.
Zuhair Haidar, DDS, MSc Oral and Maxillofacial Surgery College of Dentistry King Saud University P.O. Box 5967 Riyadh 11432, Saudi Arabia
A
CALCAREOUS
BRIDGE
67-year-old black man had suffered pain in his mouth for 3 weeks when he sought treatment. Clinical examination revealed a fungating mass on the right side of the floor of the mouth and tongue.
1
Diagnosis of squamous cell carcinoma was established. Full-mouth extraction of the periodontally compromiseddentition was indicated before radiation therapy could be commenced. A radiopacity associated with the mandibular anterior teeth, immediately superior to the crestal bone, was noted during panoramic radiography (Fig. 1). This was interpreted as calcareous deposits.However, it turned out to be a horizontally positioned incisor, completely embeddedin calculus without evidence of periodontal attachment. This unusual presentation may represent severe periodontal disease, minor localized trauma, and adherence of the avulsed tooth to the calcareous bridge with further deposits resulting in total encasement of the tooth. Robert Chuong, DMD, MD Douglas L. Starns, DDS Department of Dentistry and Oral Surgery University of Virginia Charlottesville. VA 22903
of dental instruments that break during surgery should be removed whenever the incident occurs.
UNUSUAL
661
ABSENCE MOLARS
A
OF ALL PERMANENT
SECOND
n l&year-old man was referred because his permanent secondmolars were missing, causing both the young man and his mother some concern. Examination revealed a well-developed, healthy looking, fair-haired young man in no acute distress. The maxillary and mandibular second molars were absent; no bulges were palpable on the buccal and lingual aspects of these areas. There was no history
662
Radiology forum
ORAL SURG ORAL MED ORAL PATHOL November 1990
of premature extraction of the first permanent molars. The remaining teeth of the permanent dentition were in good condition; no other eruptive abnormalities were observed. Dental films showed that the teeth were absent; there was only a little calcified massin the alveolus of the maxillary secondmolar on the left side. Dr. Tian Zhi-Min Dental Department Jing An District Central Hospital Shanghai, People’s Republic of China Fig.
1 ANTROLITH
A
59-year-old woman attended the Oregon Health SciencesUniversity Dental Clinics for routine dental care. Full-mouth radiographs showed a round radiopaque mass within the maxillary sinus apical to the maxillary left second premolar. Stereographic viewing of the radiographs indicated that the mass was
Fig.
2
Fig.
3
Fig.
1
Volume70 Number 5
Fig.
1. Radiograph showing metallic object.
Fig.
Fig. 2. Removed object turned out to be tip of dental elevator.
Zuhair Haidar, DDS, MSc Oral and Maxillofacial Surgery College of Dentistry King Saud University P.O. Box 5967 Riyadh 11432, Saudi Arabia
A
CALCAREOUS
BRIDGE
67-year-old black man had suffered pain in his mouth for 3 weeks when he sought treatment. Clinical examination revealed a fungating mass on the right side of the floor of the mouth and tongue.
1
Diagnosis of squamous cell carcinoma was established. Full-mouth extraction of the periodontally compromiseddentition was indicated before radiation therapy could be commenced. A radiopacity associated with the mandibular anterior teeth, immediately superior to the crestal bone, was noted during panoramic radiography (Fig. 1). This was interpreted as calcareous deposits.However, it turned out to be a horizontally positioned incisor, completely embeddedin calculus without evidence of periodontal attachment. This unusual presentation may represent severe periodontal disease, minor localized trauma, and adherence of the avulsed tooth to the calcareous bridge with further deposits resulting in total encasement of the tooth. Robert Chuong, DMD, MD Douglas L. Starns, DDS Department of Dentistry and Oral Surgery University of Virginia Charlottesville. VA 22903
of dental instruments that break during surgery should be removed whenever the incident occurs.
UNUSUAL
661
ABSENCE MOLARS
A
OF ALL PERMANENT
SECOND
n l&year-old man was referred because his permanent secondmolars were missing, causing both the young man and his mother some concern. Examination revealed a well-developed, healthy looking, fair-haired young man in no acute distress. The maxillary and mandibular second molars were absent; no bulges were palpable on the buccal and lingual aspects of these areas. There was no history
662
Radiology forum
ORAL SURG ORAL MED ORAL PATHOL November 1990
of premature extraction of the first permanent molars. The remaining teeth of the permanent dentition were in good condition; no other eruptive abnormalities were observed. Dental films showed that the teeth were absent; there was only a little calcified massin the alveolus of the maxillary secondmolar on the left side. Dr. Tian Zhi-Min Dental Department Jing An District Central Hospital Shanghai, People’s Republic of China Fig.
1 ANTROLITH
A
59-year-old woman attended the Oregon Health SciencesUniversity Dental Clinics for routine dental care. Full-mouth radiographs showed a round radiopaque mass within the maxillary sinus apical to the maxillary left second premolar. Stereographic viewing of the radiographs indicated that the mass was
Fig.
2
Fig.
3
Fig.
1